KR101725875B1 - Audio signal transmitting method of display apparatus, audio signal receiving method of glasses apparatus, audio signal transceiving method, display apparatus, audio signal transeiving system - Google Patents

Abstract

A method of transmitting an audio signal of a display device is disclosed. A method of transmitting an audio signal of a display device according to various embodiments of the present invention includes the steps of identifying an eyeglass device based on a message received from an eyeglass device in a method of transmitting an audio signal of a display device, Transmitting the audio signal packet transmission time information regarding the content of the audio signal packet to the spectacle device; and transmitting the audio signal packet to the spectacle device according to the transmission time information.

Description

TECHNICAL FIELD [0001] The present invention relates to an audio signal transmitting method for a display device, an audio signal receiving method for a spectacle device, an audio signal transmitting / receiving method, a display device, a spectacle device and an audio signal transmitting / TRANSCEIVING METHOD, DISPLAY APPARATUS, AUDIO SIGNAL TRANSEIVING SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transmitting and receiving audio signals between a display device and an eyeglass device, and more particularly, to a method of transmitting audio signals between a display device and an active eyeglass device, An audio signal transmission / reception method, a display device, a spectacle device, and an audio signal transmission / reception system.

Dual View  Display, 3D display

With the development of digital technology, various types of electronic products are being developed and distributed. In particular, various display devices such as TVs, mobile phones, PCs, notebook PCs, and PDAs are used in most households.

As the use of display devices has increased, the user needs for more diverse functions have also increased. As a result, efforts of manufacturers of electronic products to meet user needs have increased, and products with new functions that have not been available in the past are emerging.

Especially, recently, there is a high need for a technology in which a plurality of users can view contents desired by a single display device. In addition, 3D (3-Dimensional) image display technology is emerging that can feel a stereoscopic effect in order to watch more realistic images.

As one of technologies for displaying a plurality of contents by one display device and allowing a plurality of users to watch different contents or view 3D images, a technique of alternately displaying a plurality of image frames has recently attracted attention.

This method, called stereoscopic technology, is a method of alternately outputting each image frame of a plurality of contents or alternately outputting a left eye image frame and a right eye image frame constituting 3D contents.

Here, in the case of a plurality of contents, the video frames of one content A are displayed first, and then the video frames of the other content B are displayed. . In the case of 3D content, the left eye and right eye image frames of the same contents are alternately displayed by first displaying the left eye image frame of the content and then displaying the right eye image frame of the same content.

In the case of the former technology, a user who watches any one of the contents needs to watch only the corresponding content. Therefore, there is a need for an eyeglass device specially designed to pass the light only at the timing at which the image frame of the content is displayed and watch the corresponding image. The open timing of the left and right lenses of the spectacles apparatus operates in synchronization with the display timing of the image frame to be viewed. Therefore, when one piece of content A is displayed on the display device, the eyeglass unit opens both the left lens and the right lens, and turns off both the left lens and the right lens when the other content B is displayed. The alternate display of image frames of different contents is performed at a very high speed, and the afterimage effect of the retina is maintained during the closing of the lens, so that the image appears to the user as a natural image.

In the latter technique, in order to view stereoscopic 3D images, an independent image having a difference in depth between the left eye and the right eye must be viewed. Therefore, when the left eye image frame of the content is displayed, A special eyeglass device is required to pass the image to the left eye only. Similarly, when the right eye image frame of the contents is displayed, the eyeglass device should be able to pass the light only through the right eye lens and view the image only in the right eye. The right eye image frame and the left eye image frame have a constant parallax, and the alternate display is performed at a high speed, so that the afterglow effect of the retina is maintained while the lens is closed.

Since the above-described spectacle device has a shutter that can open / close the lens in accordance with the display timing, it is called a shutter spectacle.

Since the shutter glasses have to open or close the shutter at a specific timing, it is necessary to determine and maintain the shutter driving timing through synchronization with the display device.

Bluetooth communication technology can be used as one method for this. The Bluetooth communication technology uses a total of 79 channels, ranging from 240 MHz to 2480 MHz except for the range of up to 2 MHz after 2400 MHz ISM (Industrial Scientific and Medical), and up to 3.5 MHz before 2483.5 MHz. to be.

In a multi-view system, a user who watches different contents needs to listen only to audio sounds of contents he / she watches. Therefore, technical means for transmitting audio signals to individual users is needed. At this time, the audio signal receiving means is included in the spectacle apparatus together with the shutter glass, thereby increasing the efficiency. In addition, in order to ensure the free movement of the user wearing the spectacle device, the audio signal must be transmitted to the spectacle device via wireless communication. As a result, similar to the synchronization signal of the shutter glasses, transmission of audio signals using the Bluetooth channel can be considered.

However, according to the current Bluetooth communication standard, the following points should be considered.

First, if the spectacle device is a slave device, it does not have enough power.

The Bluetooth pairing process typically starts with the transmission of the inquiry message of the master device and the process of the slave device scanning and responding to the inquiry message. Since the slave device needs to search all the channels to which the inquiry message is transmitted in order to scan the pairing object, it requires a lot of power consumption and needs to have sufficient power. It should be considered that when the spectacle device becomes a slave device, it does not have enough power.

Second, if the spectacle apparatus is a slave apparatus, the spectacle apparatus must have a function of selecting any of the plurality of searched display apparatuses.

There may be a plurality of display devices which can be paired with one spectacle device, and the spectacle device can be paired with any one of the plurality of display devices. If the spectacle device is a slave device, the spectacle device should be able to select any one of the plurality of searched display devices. However, having an interface with which the spectacle device can select a pairing object may lead to an increase in manufacturing cost. In addition, since the object to which the spectacle device is connected is a display device that is practically close, the configuration for selecting the display device through the interface will be mostly unnecessary.

Third, the eyeglass device need not be paired with a device other than the display device.

Since the eyeglass device is used only for viewing an output image of the display device, it is not necessary to perform Bluetooth pairing with another device. However, according to the existing Bluetooth communication standard, the eyeglass device tries to pair with all the devices using the Bluetooth channel. Therefore, unnecessary time is required for pairing. In particular, if the spectacle device is a slave device, the user must select a display device among the various devices that can be paired, but this interface is unnecessary for the spectacle device as described above.

Fourth, the glasses device does not require data transmission to the display device.

The eyeglass device operates synchronously with the video frame display timing of the display or only receives the audio signal and does not need to transmit data to the display device. Therefore, it is not necessary to form a separate data link between the display device and each of the spectacle glasses according to the Bluetooth communication standard. That is, unlike a general Bluetooth pairing, bidirectional communication between a spectacle device and a display device is unnecessary.

Fifth, the received audio and the displayed image need to be synchronized.

The display device alternately displays a plurality of content screens, and it takes time for an audio signal to be transmitted to the spectacle device. Accordingly, the finally transmitted audio signal may not be synchronized with the content screen that the viewer perceives visually. The transmitted audio signal needs to be synchronized with the display image.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a display device capable of effectively providing an audio signal and an audio synchronization signal output from a multi- A method of receiving an audio signal of a spectacle device, a method of transmitting and receiving an audio signal, a display device, a spectacle device, and an audio signal transmitting / receiving system.

According to another aspect of the present invention, there is provided a method of transmitting an audio signal of a display device, the method comprising: confirming a spectacle device based on a message received from the spectacle device; Transmitting transmission time information of an audio signal packet relating to at least one content output from the display device to the spectacle device and transmitting the audio signal packet to the spectacle device according to the transmission time information, .

In this case, the transmission time information may include at least one of transmission time information of an audio signal packet for a first content and transmission time information of an audio signal packet for a second content, And transmit at least one of an audio signal packet for the first content and an audio signal packet for the second content according to time information.

The transmitting of the transmission time information of the audio signal packet may include transmitting a sync train packet including transmission time information of the audio signal packet to the spectacle device, And receiving a page packet requesting retransmission of the sync train packet from the spectacle apparatus when the sink train packet can not be found within the set time.

At this time, the sync train packet includes at least one of clock information of the display device, channel map information for frequency hopping, physical address information of the display device, logical address information of the display device, transmission time information of the next sync train packet, The transmission time information of the signal packet, and the transmission time interval information of the audio signal packet.

In addition, the sync train packet may include transmission time information and transmission time interval information of an audio signal packet for the first and second contents constituting the multi-view.

Also, the sync train packet may be transmitted at a predetermined frequency and a predetermined time interval without frequency hopping.

Further, upon receipt of the page packet, the sink train packet may be transmitted to the eyeglass device again.

In addition, the step of checking the spectacle device may include scanning and inquiring an inquiry message transmitted by the spectacle device, and transmitting the inquiry message including a path loss threshold to the spectacle device The method comprising: transmitting an EIR packet (Extended Inquiry Response Packet) to the eyeglass device; and transmitting a combined notification packet requesting association from the eyeglass device if the path loss indicating a signal loss in the transmission process is smaller than the pass- receiving an association notification packet, and transmitting a baseband ACK to the spectacle device upon receipt of the association notification packet.

Also, the pass loss value may be a difference between a transmission power value and an RSSI (Received Signal Strength Indicator) value of EIR.

The audio signal packet may include at least one of clock information of a rising edge of a frame sync, phase information of a rising edge of a frame sync, dual view mode information, information of a frame sync period (integer or fraction), an audio signal, And / or information.

According to another aspect of the present invention, there is provided a method of receiving an audio signal of a spectacle device, the method comprising the steps of: confirming a display device by transmitting a message to the display device; Receiving transmission time information of an audio signal packet for at least one content from the display device; and receiving the audio signal packet from the display device according to the transmission time information.

The transmission time information may be transmission time information of an audio signal packet for any one of a plurality of contents for multi-view.

The receiving of the transmission time information of the audio signal packet may include receiving a sync train packet including transmission time information of the audio signal packet from the display device, And transmitting a page packet requesting retransmission of the sink-train packet to the display device when the sink-train packet can not be found.

In addition, the sync train packet may include transmission time information and transmission time interval information of an audio signal packet for the first and second contents constituting the multi-view.

Also, the step of verifying the display device may include transmitting an inquiry message to the display device, and transmitting the inquiry message including a path loss threshold corresponding to the inquiry message Receiving an EIR packet (Extended Inquiry Response Packet); and transmitting a federation notification requesting association with the display device if a path loss indicating a signal loss in a transmission process is smaller than the pass- Transmitting an association notification packet to the display device; and receiving a baseband ACK corresponding to the association notification packet from the display device.

According to another aspect of the present invention, there is provided a method of transmitting and receiving audio signals, the method comprising: transmitting a message to a display device by a spectacle device; The method comprising the steps of: confirming a spectacle device based on a message; transmitting transmission time information of an audio signal packet relating to at least one content outputted by the display device to the spectacle device; And transmitting the audio signal packet to the spectacle device.

According to another aspect of the present invention, there is provided a display device including: a signal processing unit configured to alternately configure video frames of a plurality of contents; a display unit displaying the configured video frames; A transmission unit configured to transmit the transmission time information of the audio signal packet with respect to the plurality of contents to the eyeglass unit that has transmitted the inquiry message, And a control unit for controlling the transmission to the eyeglass device.

The transmission time information may include at least one of transmission time information of an audio signal packet for a first content and transmission time information of an audio signal packet for a second content, At least one of an audio signal packet for the first content and an audio signal packet for the second content.

According to another aspect of the present invention, there is provided an eyeglass device comprising: a communication unit for transmitting an inquiry message to a display device; And a controller for receiving the transmission time information of the signal packet and receiving the audio signal packet from the display device according to the transmission time information and outputting the packet.

In order to achieve the above object, an audio signal transmitting / receiving system according to an embodiment of the present invention transmits transmission time information of audio signal packets related to a plurality of contents for multi-view to a spectacle device transmitting an inquiry message A display device for transmitting the audio signal packet to the spectacle device according to the transmission time information; and a display device for transmitting the audio signal packet for the plurality of contents from the display device when the display device is confirmed by transmitting the inquiry message. And a spectacle device that receives the transmission time information and receives the audio signal packet from the display device according to the transmission time information and outputs the packet.

According to various embodiments of the present invention as described above, the present invention can efficiently provide an audio signal and an audio synchronization signal output from a multi-view display device to a spectacle device using Bluetooth technology.

Figure 1 illustrates an exemplary system 1000 for viewing multi-view video,
2 is a diagram showing an outline of the operation of the 3D active shutter glasses,
3 shows a high-level system block diagram of a multi-view viewing system identical to that implemented in display and ASG devices,
4 is a high level sequence diagram showing how this Bluetooth connection is made,
Figure 5 is a flow diagram of the sequence diagram of Figure 4,
FIG. 6 is a flowchart showing the synchronization method of FIG. 5 from the viewpoint of a display device;
FIG. 7 is a flowchart showing the synchronization method of FIG. 5 from the perspective of a spectacle device,
FIG. 8 is a sequence diagram illustrating an association process,
FIG. 9 is a flowchart illustrating a method of transmitting an audio signal of a display device including the sequence diagram of FIG. 8;
FIG. 10 is a flowchart illustrating a method of transmitting an audio signal of a display apparatus, which further includes determining a condition for receiving a federation notification packet in FIG.
Figure 11 shows an air format of an EIR payload,
12 shows an air format of a federated notification payload,
13 shows a color shift field format,
14 is a sequence diagram for performing synchronization establishment between a display device and an ASG device to perform audio signal transmission using an audio signal packet (ASP)
FIG. 15 is a flowchart showing a method of establishing synchronization and transmitting an audio signal by the method shown in FIG. 14;
16 is a diagram showing the format of a sink train payload,
17 is a sequence diagram showing a transmission sequence of an audio signal packet,
Figure 18 shows the air format of the ASP payload,
FIG. 19 is a flowchart showing an overall method of transmitting an audio signal packet according to the present invention,
20 is a block diagram illustrating the configuration of an audio signal transmitting / receiving system 1000 according to various embodiments of the present invention.
21 is a block diagram showing the configuration of a display device 100 according to various embodiments of the present invention.
FIG. 22 is a block diagram showing the configuration of the spectacles apparatus 200 according to various embodiments of the present invention.
23 is a diagram showing the shutter-on / close timing,
24 shows a normal 3D mode,
25 shows a dual view mode,
26 is a flowchart showing a combined case, and Fig.
Fig. 27 is a view showing the state transition of the ASG. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

Section 0. Definitions, Abbreviations, Normative References,

First, definitions, abbreviations, and normative references of terms used herein are briefly described.

2D Mode - Mode in which the left and right shutters are opened continuously

3D Display, 3D Display Device (3D Display) - A display device for viewing an image that can be applied to Active Shutter Glasses defined in the present specification, and includes a TV display and a PC display. The display device, the 3D display device, and the 3DD are used interchangeably in the same terminology. In addition, the 3D display device of the present specification can perform the same function as the dual view display device.

Active Shutter Glasses - Glasses for multi-view or 3D video viewing, with an RF transceiver and a pair of shutters in accordance with this specification. In this specification, the ASG, 3DG, and spectacle devices are mixed in the same terminology.

3D mode (3D mode) - A mode for 3D viewing where the left and right shutters are alternately opened and closed to receive light at one time at a given time

Closed, Closed state - When the LC shutter is in an opaque state

Dual-View Mode - mode in which the left and right shutters open and close at the same time

Frame - one of a plurality of still pictures that are displayed sequentially or reproduced at a preset frequency for playing a video or movie

Frame Frequency - The frequency at which 2D images are generated on a 3D display, which is twice the operating frequency of compatible active glasses.

Frame Sync - A signal indicating the timing of the left frame and the right frame. The rising edge and the falling edge of the frame sync represent the starting point of the left frame and the right frame, respectively.

Frame Sync Period (Fraction) - The frame sync period (fraction fraction) represents the fractional part of the time interval between frame syncs.

Frame Sync Period (Integer) - The frame sync duration (integer) represents the integer part of the time interval between frame syncs.

Audio Signal Packet - A packet for transmitting an audio signal. ASP.

Left Frame - Frame for the left eye

Left Shutter - Shutter for left eye (left eye)

Mode-specific shutter operation

Open, open state - Transparent state of LC shutter

Operational Frequency - Shutter Open Frequency

Protocol - A set of rules for RF communication between a 3D display and active glasses to control the motion of the shutter in active glasses

RF Transceiver - An apparatus for transmitting or receiving shutter control information or other information as defined herein.

Right Frame - Frame for right eye (right eye)

Right Shutter - Shutter for the right eye

Shutter Duty Cycle - The ratio of the open period to the open period and the closed period (open period / (open + on period)

Shutter Operation - Shutter operation is on and off.

Shutter, shutter unit - An active shutter cell that is one of a pair installed in active glasses

Section 1. General

1. Scope

This specification describes the electro-optical properties of active shutter glasses for 3D video viewing known as Full HD Active Glasses Initiative Glasses or 3D glasses. Such 3D glasses are simply referred to as ACTIVE SHUTTER GLASSES (hereinafter referred to as ASG) because they can provide a multi-view environment in which a plurality of contents can be viewed by different viewers. Such an ASG enables viewing of content on a TV display, a PC display, a projector, or a theater with a XPAND 3D system (hereinafter referred to as 3D display).

This specification describes a signal transmitted between an ASG and a display. This signal enables the user to view the multi-view video through the Full HD initiative glasses by the multi-view video and timing synchronization means.

The present specification includes conditions for conformance, the environment in which the ASG is tested and operated, the electronic optical characteristics of the ASG providing the display device with the exchange of electronic-optical information, the active shutter characteristics required for the ASG, Describe the protocol used between the ASG and the display.

2. General Description of Active-Shutter Glasses

There are a number of techniques that enable a viewer to record or play a video image in a way that the resulting video has depth and is therefore recognized as 3D. These techniques are referred to as stereoscopic because they operate by transferring multiple video image streams to the left and right eye.

Most stereoscopic 3D systems display images from both the left video image stream and the right video image stream in a single display while embedding images from each eye into a single stream.

Therefore, the difference in these systems can be seen in the way that each system conveys the left image for the left eye and the right image for the right eye. These systems typically allow a user to view a 3D video media at a point where the glasses send an accurate image to each eye, while wearing a certain type of specialized glasses.

While there are external systems for use in commercial cinemas, the most common type of stereoscopic ASG used in consumer electronics is the liquid-crystal shutter mechanism for each eye. Each lens is controlled to pass light electronically only when the intended image in the eyes behind the shutter is displayed on the screen.

This type of shutter system has the advantage of being able to operate with most display types. That is, the provided display can support a sufficiently high frame refresh rate without flickering. The minimum frame update rate for stereoscopic image display without noticeable flicker should typically be at least twice the minimum frame update rate required for a non-stereoscopic image display (or single content display), at least without flicker.

Figure 1 is a diagram illustrating an exemplary system 1000 for viewing video.

This system consists of two subsystems, a display 100 with an RF transceiver and an ASG 200 with an RF transceiver.

In the 3D image viewing system, the display 100 alternately displays images for the left and right eyes. The ASG 200 has a pair of shutters that allow a user to view 3D images through the left and right eyes. An LC device or equivalent device is used for the shutter. When synchronizing with the sequence of images in the display 100, the RF transceiver transmits a set of information determined by the RF communication protocol. The ASG 200 has an electronic circuit including an RF transceiver and is synchronized with the display 100 to control the light transmission of the two shutters. In the case of receiving an RF signal, the shutter operates to stereoscopically provide the image of the display 100 to the user.

The ASG protocol is defined by the following concept.

It should be possible to control the on / off timing of the shutters so that the ASG 200 can operate for any type of display 100 herein.

- It should be possible to use a common protocol even with a shutter device having different ASG types or different features.

- Minimize the impact on the hardware design of the ASG 200 and / or RF transceiver.

2. Operation Overview of Active-Shutter Glasses (Operation Overview of Active-Shutter Glasses)

2 is a diagram showing an outline of the operation of the active shutter glasses.

The shutter operation of the ASG 200 is controlled based on the information transmitted from the display device 100 shown in Fig. When viewing a 3D image, 3D images for the left eye and the right eye are alternately displayed on the display device 100. [ The set of information associated with synchronization is transmitted from the display device 100 to the ASG 200 in the form of RF packets. Such information includes information such as frame frequency, on / off timing of the left shutter and the right shutter, and is periodically transmitted according to the RF communication scheme in a time interval in order to reduce power consumption. The ASG 200 receives such information, demodulates the RF signal, extracts synchronization information, and resynchronizes the operation of the frame frequency of the display device 100 with the left shutter and the right shutter. During a time interval in which there is no synchronization information, the ASG 200 itself controls the shutter while maintaining the same frame frequency at the last frame frequency received.

3. Main Parameters

Table 2 is a table summarizing the main parameters used herein.

Details of each parameter will be described in detail in the related section.

Device Parameters Applicable values unit See RF Transceiver Parameters with
regard to RF communication Value complying with Bluetooth Specification - Section 2 Shutter Operating Frequency 48, 50, 60 and 72 for TV
72 for Cinema Hz Section 3 Contrast Ratio 300: 1
500: 1 (Recommended) -

4. Conventions and notations

4.1. Representation of numbers

The measured value is rounded to the least-significant digit of the corresponding specified value. For example, if the specification value is 1.26, the positive range error is +0.01, and the negative range error is -0.02, the range of the measured value is 1.235 to 1.275.

If a specification value is given such as x units max, x units min, then the measured value is not rounded before comparison with the specification value. This type of parameter will not exceed the limit set specified by the extracted value of x.

Numbers can be expressed in decimal notation given as digits 0-9. Decimal notation is a dot ("."). In hexadecimal notation, it can be expressed as 0-9, A-F, and can be preceded by "Ox". In hexadecimal notation, the letter x represents either 0-9 or A-F. Binary representations and bit patterns can be represented by strings of numbers 0 and 1. In the n-bit pattern, bit [n-1] may be the most significant bit (MSB) and bit [0] may be the least significant bit (LSB). Transmission can be made from bit [0].

4.2. Name (Names)

The names of the entities are indicated by a starting alphabet (eg, specific devices, signals, etc.).

5. General Requirements

5.1. Environments

5.1.1. Test environment

The test environment is a set of specifications for the near-air conditions surrounding the ASG to be tested. It can have the following attributes.

Temperature: 25.0 ° C ± 3.0 ° C

Relative humidity: 45% to 75%

ASG 200 can be tested without strong interference from other electronic devices operating in a 2.4 GHz bandwidth, such as microwave ovens or wireless LAN devices.

It may not be considered for the moisture for ASG 200. Unless otherwise noted, all tests and measurements can be made in this test environment.

5.1.2. Operating environment

The ASG 200 is used in a room without strong interference of other electronic devices operating in a 2.4 GHz bandwidth, such as a microwave oven and a wireless LAN device. Also, there is no condensation of moisture during ASG operation.

Section 2. Radio Transport Specification

6. Bluetooth System Requirement

This section specifies a mechanism for synchronizing the active shutter glasses for the 3D video program being displayed on the display device 100. The synchronization information is communicated using Bluetooth wireless technology.

6.1. System Overview

This specification describes a mechanism for providing synchronization using Bluetooth wireless technology. Bluetooth technology addresses many issues surrounding the use of wired and infrared systems. It also affects the fact that Bluetooth devices are installed in electronic devices for a variety of other purposes to support televisions and Bluetooth remote controls, streaming audio to headsets or speakers, pictures transferred, home automation, and the like.

3 is a high-level system block diagram of a content viewing system identical to that implemented in display device 100 and ASG device 200. As shown in FIG.

The system comprises a display device 100 and an arbitrary number of ASG devices 200. Within display device 100, the display driver controls a display, which may be an LCD, an LED (e.g., OLED), PDP or DLP. The display typically includes a processor capable of operating a Bluetooth host. (Ie, HCI * 1, L2CAP * 1, SDP * 1, other supported profiles, etc. The definition of HCI, L2CAP, SDP will be mentioned in the Bluetooth specification).

On the other hand, although not shown in the figure, the display apparatus 100 transmits an audio signal and a synchronization signal thereto to the ASG apparatus 200. Similarly, audio signals and synchronization signals are transmitted through Bluetooth. This will be described later.

In this specification, the ASG device 200 is connected to the compatible display device 100 via Bluetooth. The setup and synchronization information is communicated to the Bluetooth ASG device 200 via a Bluetooth link. The Bluetooth device in display device 100 will capture the timing of the L / R sync signal (i.e., frame sync) relative to the local Bluetooth clock. The Bluetooth device transmits timing information related to the Bluetooth clock of the display device 100 to the Bluetooth device of the ASG device 200 in order to generate an appropriate signal for controlling the LC shutter associated with the Bluetooth clock of the ASG device 200. [

6.2. Bluetooth Procedure

FIG. 4 is a flow chart of the sequence diagram of FIG. 4, FIG. 6 is a flowchart illustrating the synchronization method of FIG. 5 from the viewpoint of a display device, FIG. 7 is a flowchart showing the synchronization method of FIG. 5 from the perspective of a spectacle device.

Hereinafter, the interaction between the display device 100 and the ASG device 200 will be described. There are three main actions. In the embodiment of the present invention to be described later, an audio signal packet is used as an ASP (Audio Signal Packet).

4 and 5, a method for transmitting / receiving audio signals between a display device and an ASG device includes a step S510 of searching for and associating a display device with a searched display device (S510) (S520) of transmitting the transmission timing information of an audio signal packet (ASP) including a control signal of the ASG device to the ASG device (S520); and displaying the transmission timing information of the audio signal packet (S530). The ASG device outputs the transmitted audio signal packet (ASP). Hereinafter, the ASG device is used in the same terms as the spectacle device.

6, an audio signal transmitting method of a display device according to various embodiments of the present invention includes: receiving a message from a spectacle device and confirming a spectacle device based on the received result (S610) (S620) transmitting transmission time information of an audio signal packet (ASP) related to at least one content to the spectacle device, transmitting an audio signal packet ASP to the spectacle device according to the transmission time information ).

7, a method of receiving an audio signal of a spectacle device according to various embodiments of the present invention includes the steps of: searching a display device and confirming a display device according to a search result (S710) (S720) of receiving an audio signal packet (ASP) for at least one content constituting the audio signal packet (ASP) from the display device (100) Step S730.

Steps S510, S610, and S710 describe substantially the same steps according to the subject of information processing. Steps S520, S620, and S720 also describe substantially the same steps according to the subject of information processing, and steps S530, S630, and S730 are the same.

Each step will be described collectively below.

6.2.1. Association

FIG. 8 is a sequence diagram illustrating an association process, FIG. 9 is a flowchart illustrating a method of transmitting an audio signal of a display device including the sequence diagram of FIG. 8, FIG. 10 is a flowchart FIG. 2 is a flowchart illustrating a method of transmitting an audio signal of a display apparatus according to an embodiment of the present invention.

Referring to FIGS. 8 and 9, the association process includes an inquiry message reception step S910, an EIR packet transmission step S920, a joint notification packet reception step S930, and a baseband ACK transmission step S940.

In step S910, the ASG device transmits (broadcasts) an inquiry message to a plurality of display devices in order to discover the display device.

The Bluetooth pairing process typically starts with the transmission of the inquiry message of the master device and the process of the slave device scanning and responding to the inquiry message. Since the slave device needs to search all the channels through which the inquiry message is transmitted in order to scan the pairing object, it requires a lot of power consumption and needs to have sufficient power. However, when the ASG device is used wirelessly, the ASG may not have sufficient reserve power. In addition, due to the performance limitations of the CPU, registers, etc. of the ASG 200, the information processing capability of the ASG device may be significantly lower than that of the display device. This performance limitation leads to an increase in overall pairing time.

The present invention solves this problem because the display device acts as a slave and the ASG device acts as a master. That is, the ASG device first transmits an inquiry message to the display device, and the display device scans the inquiry message through frequency hopping. Since the display device 100 often has a power source at all times, there is no problem of a standby power limit, and a high data processing speed can be used for fast scanning.

The EIR packet transmission step (S920) is a process in which the display device listens for the IN inquiry message and transmits an EIR packet (Extended Inquiry Response Packet) including a path loss. Frequency hopping method. Here, the path loss is a value indicating a loss rate of a signal, which means a maximum path loss value allowed by the display device to the ASG device. In one embodiment, the pass-through threshold value may have a value of 60-100 dB. As described later, the ASG calculates the pass loss value, compares the pass loss value with the transmitted pass loss threshold value, and determines that the display device is in a proximity state and tries to pair.

The association notification packet reception step (S930) is a process of receiving an association notification packet requesting association based on the path loss from the ASG. That is, the ASG calculates the pass loss value, and when it determines that the display device is in the proximity position, it transmits the association notification packet to the display device. When the ASG device wants to find another display device, it transmits the inquiry packet again (start from S910 again). The process of determining the proximity will be described later with reference to FIG.

The baseband ACK transmission step S940 is a process of transmitting a baseband ACK to the ASG in response to the association notification packet.

Referring to FIG. 10, in an alternative embodiment of the present invention, the association process includes receiving a query message (S1010), transmitting an EIR packet (S1020), comparing path loss values (S1030) S1040), and a baseband ACK transmission step (S1050). S1010, S1020, S1040, and S1050 are substantially the same as the steps S910, S920, S930, and S940 described above, respectively.

The comparison of the pass loss values (S1030) is a process in which the ASG determines that the display device is close to the ASG when the pass loss value is smaller than the pass loss threshold value. The pass loss value is a value obtained by subtracting RSSI (Received Signal Strength Indicator) value from TX power value. The transmit power value is a parameter defined in the BT core spec. And can have a value from -127 to 127 dBm as 1 byte. That is, it is the difference of the signal intensity value detected at the receiving end after the signal loss in the transmission process at the power value when the display device transmits the EIR packet.

The ASG determines whether the display device and the ASG can stably perform synchronization through Bluetooth pairing through the loss rate of the signal.

In one embodiment, the following cases can be assumed.

Pass loss threshold: 60 dB

First EIR

 - TX Power Value = +4 dBm

 - RSSI of EIR packet = -60 dBm

 Path loss = 4 (-60) = exceeds 64 dB threshold, so EIR of other display device is received.

Second EIR

 - Tx Power Value = +15 dBm

 - RSSI of EIR packet = -40 dBm

Path loss = 15 (-40) = 55 dB It falls within the threshold range.

As described above, if the Bluetooth ASG wants to find a display device to which the ASG wants to associate, the association process can be performed. An ASG device can support federation to one target device at a time.

In the federation process, an ASG device that is attempting to find another nearby display device is an in-query device and can actively send in-query requests. A display device that can be discovered can listen to this in-query request and send an Extended Inquiry Response (EIR). Then, the ASG device should select a display device having the minimum path loss defined in Table 4. If the pass loss is greater than the threshold, the ASG looks for another 3D display. The display device can not determine how many ASG devices are listening and does not store any information about the ASG device. When another Bluetooth device such as a keyboard or headphone is associated with the display device, the Bluetooth controller in the display device may schedule their input to one of the seven links of the piconet.

Table 3 is a table explaining the packets for the association process.

packet Packet type User Length (bytes) Direction Packet description
(Packet Description) parameter
(Parameters) Inquiry ID na ASG to display Standard BT Inquiry Sequence EIR
(Extended Inquiry Response) EIR
(Extended Inquiry Response) Per BT Spec 7 Display to ASG Information about the display contained in the EIR packet and sent to the ASG during the query response Length-Manufacturer Specific
Manufacturer Specific,
Fixed ID, Reserved,
Flags,
Path loss threshold 3 Display to ASG Display's EIR transmit power Length-TX Power,
TX Power Level,
TX Power Value Association Notification DM1 17 ASG to
Display Information about the ASG associated with the display is typically used by the display to provide user feedback. ASG BD Address,
Device Type,
Reserved
ASG Version No.
Battery Type
Remaining Battery Voltage
Battery Charging Status
Remaining Battery (ratio)
Remaining Battery (time)
Color Shift
Reserved Baseband ACK NULL na Display to ASG RF Acknowledgment

6.2.1.1. EIR Packet (EIR Packet)

An EIR packet may be transmitted at any time during an in-query response state. This packet may be provided to the ASG device by a display Bluetooth controller on the display device. The EIR packet conforms to Bluetooth standard rules, but has some manufacturer specific run fields. This discovery process is the same as that used in the Bluetooth core specification.

The parameters are described in Table 4 for the manufacturer specific EIR packet provided in the specification. This EIR packet includes the manufacturer specific data of the basic EIR data type and the power value of the transmitting end (Tx Power Value). The power value of the transmitting end (Tx Power Value) is used to find a display device as described above, and this field can be located in the EIR packet. In the future, a new EIR data structure can be added by the FHD3DI to the 'significant part' of the EIR defined in the Bluetooth Core Specification. In addition, any scheduled fields will be ignored by the ASG.

The table here and the description of this specification are in little-endian format.

Parameter Parameter Description (Parameter Description) Length-Manufacturer Specific It is used to include a length value for EIR parsing. Manufacturer Specific May be used for parsing the EIR message.
The designated value '0xFF' may be set to include the manufacturer information. Fixed ID Can be filled by the display. Value may be set to 0x000F, which means the proposed eyeglass profile in the BT-SIG. Reserved It can be set to 1 byte field 0. Flags Multicast capable The ASG is used to verify that the response device (display) is multicast capable. When the value is set to 1, it is a multicast-capable display. Reserved Reserved area is not available. Sending Audio Signal Packet (ASP) It is managed by a Bluetooth controller. DTV sets this bit depending on whether the TV is in 3D mode or dual view mode (set to 1), 2D mode or other mode (set to 0).
1: Bluetooth controller sends ASP
0: Bluetooth controller does not transmit ASP. Reserved (Remote Paired) Bit not used by ASG. FHD3DI may be reserved in the FHD3DI specification to minimize confusion with licensees.
1: Pair with remote control.
0: Not paired with the remote control. Showroom Mode The DTV sets the bit according to whether the TV is in showroom mode (set to 1) or home mode (set to 0).
1: Showroom mode enable
0: Showroom mode disable (showroom mode disable) Reserved (Remote Pairable Mode) Bit not used by ASG. FHD3DI can be defined as reserved within the FHD3DI specification to minimize confusion with licensees.
1: remote pairable mode
0: Not in remote pairable mode Reserved Reserved area is not available. Test Mode for Bluetooth Qualification Body Test Used in ASG enabled test mode. The value is set to 0 in normal mode, and set to 1 if the connected ASG wants to enter test mode (eg used at the factory). Pass loss threshold (
Path loss threshold (dB) The ASG uses this value when it determines that the ASG is within the required distance from the display.
This value indicates the maximum allowable path attenuation from the display's Bluetooth controller to the ASG. Attenuation greater than this value can tell the ASG that the distance is too long and that a different display should be found.
Pass loss = Transmitter power value - EIR_RSSI
(Path loss = TX Power Value - EIR_RSSI) Length-TX Power Used to include a length value for parsing the EIR. TX Power Level Used to parse EIR messages. Specified value 0x0A is set to indicate TX Power Level field. TX Power Value (dBm) The ASG uses this value when it determines that the ASG is within the required distance from the display. This value allows you to set the output power of the display's Bluetooth controller (typically the maximum power) when responding to an in-query.

11 is a diagram showing an air format of an EIR payload.

Table 5 is a table showing EIR payload parameters.

designation Length
(bytes) type Unit value Detail Length-Manufacturer Specific One u_int8 - 6 Manufacturer's unique section length Manufacturer Specific One u_int8 - 0xFF EIR data type: manufacturer's own data Fixed ID 2 u_int16 - 0x000F Reserved One u_int8 - 0 Reserved area, can be set to 0 Flags One - - See Table 6 (parameters in the Flags field) Path loss threshold One dB Typically, a value range of 60-100 dB Length-TX Power One u_int8 - 2 Length of TX power section TX Power Level One u_int8 - 0x0A EIR Data Type: TX Power Level TX Power Value One u_int8 dBm The Bluetooth controller's default TX power
Typically, the value range is 0 - 10 dBm

Table 6 is a table showing the parameters of the Flags field.

The display can set the bits to provide information about the state of the display device.

designation location value detailed description Multicast enabled
(Multicast capable) Bit [0] One Always 1 value.
1: Multicast enabled display
0: Display not capable of multicasting Reserved Bit [1] 0 reservation ASP transfer
(Sending ASP) Bit [2] - Managed by a Bluetooth controller.
1: Bluetooth controller sends ASP
0: Bluetooth controller does not send ASP Reserved (Remote Paired) Bit [3] - 1: The remote control is paired.
0: Remote control is not paired. Showroom Mode Bit [4] - 1: showroom mode enable
0: Disable showroom mode Reserved (Remote Pairable Mode) Bit [5] - 1: remote pairable mode
0: Not in remote pairable mode Reserved Bit [6] - Reserved area, but not available Test Mode for Bluetooth Qualification Body Test Bit [7] - 1: Test mode
0: Normal mode

6.2.1.2. Association Notification Packet

The Bluetooth controller of the display device can listen to association notifications in the frame immediately after the EIR packet is transmitted if the ASG wants to find the associated display device. The ASG device may transmit such a notification if the association with the display device is determined. This specification uses DM1 packets for federated notifications. The Bluetooth controller of the display device informs this message for each Bluetooth protocol. If the ASG device does not receive the baseband ACK, the ASG device repeats the in-query and repeats the federation notification procedure several times. Even if the federation notification fails, the ASG device may consider itself to be associated with the display device. The baseband access is a null packet with an ARQN bit (ARQN bit) set for the ACK in response to the association notification packet.

Table 7 is a table describing the parameters of the association notification payload.

This packet includes the Bluetooth device (BD) address of the ASG device, the device type, and the like.

If the parameter 'ASG Version No' of the association notification packet is 0 ([0000]), the following parameters may be ignored.

Battery type

Voltage of remaining battery

Battery charge status

Remaining battery (ratio)

Remaining battery (hours)

Color Shift

Parameter Parameter Description ASG BD Address Set the address of the Bluetooth device (BD) of the associated ASG.
The display uses this information to identify the ASG associated with it. Device Type The display is used to determine what type of device is associated. The current value is set to 0, indicating only ASG. Reserved One byte field is set to zero. ASG
Version No. Used to specify the version of the ASG that complies with the specification. Battery Type Used to identify battery type Remaining Battery Voltage Used to notify the remaining voltage of the battery Battery Charging Status Used to notify battery change status Remaining Battery (ratio) Used to notify the remaining battery as a percentage of full charge Remaining Battery (time) Used to notify remaining battery time Color Shift Used to compensate for color shift by shutter Reserved 4-byte field reserved for future use.

12 is a diagram showing an air format of the association notification payload.

Table 8 is a table describing the parameters of the association notification payload.

designation Length
(bytes) type Unit detailed description ASG BD Address 6 multiple
bytes - BD address of ASG Device Type One u_int8 - 0: ASG 1-255: Reserved Reserved One u_int8 - Set to 0.
Reserved for future use. ASG Version No. Bit [3: 0] - - 0x01 for Ver.1.0 Battery Type Bit [7: 4] - - See Table 9 for details on factory default settings. Remaining battery voltage (
Remaining Battery Voltage (Vrem)) One u_int8 - 25 * Vrem [mV]
(for Vrem = 0 to 254)
In the case of 3V, Vrem = 120 (decimal = 0x78).
No info (for Vrem = 255) Battery charge status (
Battery Charging Status) Bit [1: 0] - - See Table 10 for details.
Remaining Battery Ratio (
Remaining Battery (ratio) Bit [4: 2] - - See Table 11 for details.
Remaining Battery (time) Bit [7: 5] - - See Table 12 for details.
Color Shift 2 u_int16 - See Table 8 for details. Reserved 4 u_int8 - Set to 0.
Reserved for future use.

Battery Type Field Data Format

Battery type field data can be formatted as shown in the table below.

If the battery type is not known, Bit [7: 4] can be set to 0 or all can be set to 1.

Table 10 is a table showing the state of charge of the battery.

Table 11 shows the remaining battery (ratio).

Table 12 shows the remaining battery (time).

Color shift field data format

13 is a diagram showing a color shift field format.

If color shift data of the ASG is available, this field is used for notification to the display device. The display device can adjust the colorimetry to match the ASG. The color shift field data is formatted as follows.

The S field indicates the display of? U ',? V'. If the value of [Delta] u 'or [Delta] v' is negative, the S field is set to one. Otherwise, it is set to zero. If the value of the color shift is 0, Bit [7: 0] = 0x80 and Bit [15: 8] = 0x80 are transmitted. Bit [7: 0] = 0x00 and Bit [15: 8] = 0x00 are transmitted if there is no information on the color shift. The fields of [Delta] u 'and [Delta] v' represent the distance from the white light source in the u'-v 'coordinate. The value representation method is 1/1000. For example, 0x96 is -0.022 and 0x16 is +0.022. Details are given in section 7.8 of this document.

6.2.1.3. Class of Device

Two classes of devices (CoD: 0x00043C, 0x08043C) from the display device may be used.

6.2.1.4. effect

As described above, the ASG can perform Bluetooth pairing without consuming power.

In addition, having an interface through which the spectacle device can select a pairing object may increase the manufacturing cost. Since the object to which the spectacle device is connected is a display device that is practically close to the display device, a configuration for selecting a display device through an interface is unnecessary, and this configuration merely delays the pairing time.

However, the ASG of the present invention does not have a separate interface for selecting a display device. Instead, when the loss of the signal of the display device is smaller than a preset value (pass loss threshold value), the pairing is performed without any additional condition. Thus, the pairing time is shortened because it is not attempted to connect to a device that is not unnecessarily close.

Moreover, since the ASG does not attempt to pair Bluetooth with other devices other than the display device, the pairing time is significantly reduced.

6.2.2. Synchronization Establishment

Hereinafter, a method of performing initial synchronization for audio signal transmission between the display device and the ASG device will be described.

FIG. 14 is a sequence diagram for performing synchronization establishment between a display device and an ASG device to perform audio signal transmission using an audio signal packet ASP; FIG. 15 is a sequence diagram for establishing synchronization using the method shown in FIG. 14, Fig. 2 is a flowchart showing a method of transmitting a signal. Fig.

Referring to FIG. 15, the audio signal transmission process includes steps S1510 to S1510 of checking the spectacle device, transmission step S1520 of a Sync Train Packet or STP, (S1530), receiving a page packet (S1540), and transmitting an audio signal packet (S1550).

S1510 has been described in detail in the above-described embodiment, and redundant description is omitted here. Hereinafter, a process of transmitting a sync train packet and transmission time information of an audio signal packet (ASP) related to at least one content output from the display device to the eyeglass device after association between the display device and the ASG device is performed .

Table 13 is a table describing packets for such connection establishment.

packet Packet type User payload
(bytes) direction Packet description parameter Page ID Na ASG to
Display Standard BT Page Sequence Sync Train DM3 28 Display to ASG A sequence of periodic packets provides ASG with all the information needed to locate the ASP. Current BT Clock,
Next Broadcast Instant,
AFH Channel Map,
Display BD Address,
LT_ADDR_Audio1,
ASP_Interval_Audio1,
Next Broadcast Offset_Audio1,
LT_ADDR_Audio2,
ASP_Interval_Audio2,
Next Broadcast Offset_Audio2

6.2.2.1 Sync Train Packet

The Sync Train Packet is a sequence of periodic packets transmitted by the display device 100 when the display device expects to transmit an audio signal to the ASG. When the display device transmits a sync train, the ASG device synchronizes to it.

This sync train packet includes all information necessary for the ASG device to receive the audio signal packet (ASP) transmitted from the display device. In particular, it includes transmission time information of an audio signal packet. Further, the sync train packet is transmitted at a predetermined frequency and a predetermined time interval without frequency hopping. Specifically, a plurality of spectacle devices receive a sync train packet broadcast through the same hopping map.

In an extended embodiment, the sink-train packet may additionally include information for transmission of a beacon. That is, the beacon transmission time information may be included. In this case, the ASG device can recognize the transmission timing of the beacon and the audio signal packet by receiving the sync train packet.

The DM3 of the standard Bluetooth packet can be used to send the sink train in a non-standard way. DM3 is small enough to fit within less than one frame. Each field of the sync train is included in one frame at a specific frequency and transmitted. These packets are not used for other purposes due to compatibility issues.

Table 14 is a table that provides parameters and characteristics of sink trains.

The ASG device can easily find the sink train because the display device uses three frequencies in succession. This sink train starts with a page and is transmitted every 120 ms for every 80 ms. However, this example is an embodiment of the present invention, and a sink train may use four or more frequencies or be capable of transmission using less than three frequencies.

Once the ASG device normally receives the sink train, subsequent sink trains are ignored. However, the transmission of this sink train will continue for a while.

Therefore, if there is an ASG device that wants to sink, it can listen to the sink train and reconnect to the display device without page request.

parameter value Explanation Frequency (fquencies) 2402, 2426, 2480 Mhz One DM3 packet per frequency per period can be sequentially transmitted to the master slot. There is no frequency hopping for the sink train. It is always transmitted at the same three frequencies. Period 80 ms (128 slots) The sink train occurs at 80ms intervals. Duration 120 seconds When the display receives a page from the ASG device, it begins to transmit the sink train for a specific time. The sync train is typically transmitted during short time intervals during which the ASG can be synchronized. This minimizes RF signal interference from other devices. Timeout 311.25 ms (166 slots) The ASG device can wait to listen to the sink train. If the ASG device does not find a sync train during this timeout period, it sends a page. Packet Transmission Triggering (1) Sink train transmission to Page Response for Page
(2) the page-page response process exists and thereafter the sink-train transmission Receive from ASG Hopping on that frequency and receiving when matched
Triggering to send page when not receiving

Table 15 is a table for explaining the parameters of the sink train payload.

parameter Parameter Description Current BT Clock ASG can be used to get the first synchronization to the display's Bluetooth clock. Value may be set to the current Bluetooth clock when this packet is transmitted by the Bluetooth controller of the display. Next ASP Clock
(Next Broadcast instant) It can be used by the ASG to determine when the next ASP will occur. Value can be set to the Bluetooth clock when the next ASP is transmitted by the Bluetooth controller of the display. AFH Channel Map It can be used by the ASG to identify which RF channel the display is using. The value can be set to the current AFH map by the Bluetooth controller of the display. The value may be the same as the AFH channel map delivered in the Bluetooth-specific AFH message. The AFH channel map is used for ASP transmission. Display BD Address
(Broadcaster BD Address) Provides a full Bluetooth device address of the display. The value may be set to a unique BC address by the Bluetooth controller of the display device. LT_ADDR Address to use for ASP
LT_ADDR_Audio 1 - LT_ADDR for content 1
LT_ADDR_Audio 2 - LT_ADDR for content 2 ASP Interval It is used by the ASG to identify the duration of the ASP. The value is set by the Bluetooth controller of the display device at the time interval of the ASP.
ASP Interval_Audio1 - ASP Interval for Content 1
ASP Interval_Audio2 - ASP Interval for Content 2 Next Broadcast Offset Audio Sync information for receiving audio streaming
Next Broadcast Offset Audio1 - Next Broadcast Offset for Content 1
Next Broadcast Offset Audio2 - Next Broadcast Offset for Content 2 Version No. It is filled by the display. 1 < / RTI > Display ID It is used for display identification. When used in cinemas, all possible ASGs must turn off the LEDs to prevent interference to the user in a dark cinema environment.

16 is a diagram showing a format of a sink train payload.

Table 16 shows the parameters of the sink train payload.

designation Length (bytes) type Unit detailed description Current BT Clock 4 Snapshot of the current master piconet clock (full 28 bit BT clock) Next ASP Clock 4 The following ASP's Bluetooth clock transmission (full 28 bit BT clock) AFH Channel Map 10 multiple bytes - If the content is not reserved, it contains 79 1-bit fields.
The nth field contains a value for channel n.
Bit 79 is reserved (set to 0 on transmission and ignored on reception)
A 1-bit field is interpreted as follows.
0: Channel n is not used.
1: Channel n is used. Display BD Address 6 multiple bytes - BD address of the display LT_ADDR_Audio1 One LT_ADDR for content 1 ASP Interval_Audio1 2 u_int16 slots ASP cycle for content 1 Next Broadcast Offset_Audio1 One Next Broadcast Offset for Content 1 LT_ADDR_Audio2 One LT_ADDR for content 2 ASP_Interval_Audio2 2 u_int16 slots ASP cycle for content 2 Next Broadcast Offset_Audio2 One Next Broadcast Offset for Content 2 Version No. One u_int8 - 1.
It is not a compatibility issue. Display ID One u_int8 - Set to 0: Household use
1-31: Theater use
32-255: Reserved for future use

As described above, the spectacle device operates synchronously with the display timing of the image frame of the display device, and does not need to transmit data to the display device. Therefore, it is not necessary to form a separate data link between the display device and each of the spectacle glasses according to the Bluetooth communication standard. But instead receives a sync train packet transmitted using the same hopping map by the display device as described above. Thus, the ASP timing information can be received quickly and accurately, and the Bluetooth pairing time is shortened as a whole.

After the ASG receives the sink-train packet, it receives the ASP packet according to the information included in the sink-train packet. In an extended embodiment, the ASG may receive beacons independently of the reception of the ASP. At this time, the ASG turns on / off the shutter glass according to the synchronization information included in the beacon and outputs the audio signal included in the ASP.

The step S1540 of receiving the page packet is a process of receiving a page packet from the spectacle apparatus when the spectacle apparatus can not find the sink train packet within a preset time. When the display device receives the page packet, the display device transmits the sink train packet back to the spectacle device. This is an indication for the display device to start the sink train.

6.2.3. Audio signal transmission operation

17 is a sequence diagram showing a transmission sequence of an audio signal packet.

As shown in FIG. 17, after the ASG device establishes synchronization with the display device, it periodically receives the ASP (audio signal packet) and adjusts the output timing of the audio signal based on the information included in the ASP, thereby performing audio synchronization do.

In the extended embodiment, the ASP and the beacon can be independently transmitted at different timings. Figure 17 shows this embodiment.

Table 17 is a table for explaining the ASP parameters.

packet Packet type User payload
(bytes) direction Packet description parameter ASP DM1 17 Display to ASG Sequence of periodic packets providing timing information of audio and audio signals to ASG
ASG also uses this packet to synchronize to the display's Bluetooth clock. BT clock at rising edge of Frame Sync,
Reserved,
Dual-View Mode,
Reserved,
BT clock phase at rising edge of Frame Sync,
Frame Sync Period (Integer),
Frame Sync Period (Fraction)
Audio signal 1
Audio signal 2
Audio signal 1 offset
Audio signal 2 offset
Can be defined

6.2.3.1. Audio Signal Packet (ASP)

The audio signal packet provides the audio signal and audio signal timing information to the ASG device listening to it. The ASP may be a periodic sequence of DM1 packets providing L / R shutter control information to the ASG device. It provides a frame syncening edge for the Bluetooth controller's Bluetooth clock, and provides shutter control timing related to the frame sync. In addition, the ASP packet may include an audio signal for the contents constituting the multi-view. In this case, the audio signal of each content is compressed or uncompressed and loaded in the ASP packet. The ASG apparatus decodes and outputs the audio signal according to the output timing of the audio signal (if the decoded signal is transmitted) or outputs it as it is. The ASP packet can be transmitted every 80 ms. The ASG device may provide a dual view mode, where each ASP device outputs only the audio signal corresponding to its view.

In an expanded embodiment, the ASP may include information on beacons. That is, an ASP may be a part of a beacon or a form in which a beacon is included in an ASP. In this case, the ADG receiving the ASP or the beacon controls the shutter on / off according to the information contained in the received packet and outputs an audio signal.

Table 18 explains the parameters of the ASP payload. However, it is not necessary to include all parameters of the ASP addition, but it may include only a part of them. For example, if the display start point (audio output start point) of the dual view image is promised, the output timing information of the audio signal may be unnecessary.

It may further include some parameters. For example, if synchronization of the shutter on / off timing of the ASG with audio output is required, it may further include parameters for the shutter on / off timing.

Further, in the dual view mode, the audio signal packets for each view may be transmitted individually or together. That is, the ASP for view 1 and the ASP for view 2 are individually transmitted, and the ASG can confirm the transmission timing of the ASP to be received by the sink train packet. When an audio signal of each view is transmitted together with one ASP, the ASG extracts only the audio signal to be output from the received ASP and discards the remaining audio signals.

parameter Parameter Description BT clock at rising edge of Frame Sync ASG can be used to determine the single frame synching edge time in the Bluetooth clock. If the rising edge of the last frame sync is detected, it can be set to the Bluetooth clock by the Bluetooth controller of the display. Reserved A 2-bit field may be set to zero. Dual-View Mode If the display provides a dual view mode, it is configurable. In the dual view mode, the audio signal to be output must be selected. Reserved The 1 bit field is set to zero. BT clock phase at rising edge of Frame Sync ASG uses a fractional-type Bluetooth clock value to get 1 us accuracy in the frame sync measured by the Bluetooth clock (ASG shall use this fractional BT clock value to obtain 1 frame accuracy as measured by BT clock .)
This provides Bluetooth clock timing for the unit of 1 us frame-synching edge by the display's Bluetooth controller. (This shall be set by the 3D display's BT controller to provide the clock timing for Frame Sync rising edge in units of 1 us.) Frame Sync Period (Integer)
/ Frame Sync Period (Fraction) The value is set by the display's Bluetooth controller and is done for a frame sync period measured in microseconds and 1/256 microseconds. Audio signal 1  Audio signal for view 1 Audio signal 2  Audio signal for view 2 Audio signal 1 Offset  Output offset of audio signal for view 1 Audio signal 2 Offset  Output offset of the audio signal for view 2

18 is a diagram showing the air format of the ASP payload.

Table 19 is a table showing the parameters of the ASP payload.

designation Length
(bytes) Unit type The details BT clock at rising edge of Frame Sync Bit [27: 0] - - BT clock (full 28 bits) Reserved Bit [29:28] - - 0 < / RTI >
Reserved for future use. Dual-View Mode Bit [30] - - 0: 3D mode
1: Dual view mode Reserved Bit [31] - - It is set to 0 but not available. BT clock phase at rising edge of Frame Sync 2 us u_int16 Bluetooth clock duration value in microseconds
It is combined with a Bluetooth clock that arrives at a precise microsecond timing for the frame synchro- nizing edge.
The valid range is 0-624us. Frame Sync Period (Integer) 2 us u_int16 At the microsecond, the frame sync duration interval area, for example, 16666
The valid range is 0-65535 us Frame Sync Period (Fraction) One 1/256 us u_int8 The valid range is 0-255
Frame sync area fractional part in 1/256 us
Can be added to the integer area to reach a full frame sync period.
E.g
Frame sync period Integrator: 16666us
Frame sync duration fraction: 170 (0.6640625 us)
Full frame sync duration: 16666.6640625 us

FIG. 19 is a flowchart showing an overall method of transmitting an audio signal packet according to the present invention.

Referring to FIG. 19, in the audio signal packet transmission method, the ASG first transmits a (query) message to the display device (S1910), and the display device confirms the presence of each other by responding thereto (S1920). Then, transmission time information of an audio signal packet for at least one content output from the display device, that is, ASP, is transmitted to the ASG (S1930). Then, the display device transmits the ASP to the ASG according to the transmission time information (S1940). The ASG outputs the audio signal included in the ASP in synchronization with the video output timing.

Hereinafter, a hardware configuration of the display device and the ASG device will be briefly described.

FIG. 20 is a block diagram illustrating the configuration of an audio signal transmitting / receiving system 1000 according to various embodiments of the present invention. FIG. 21 is a block diagram illustrating a configuration of a display apparatus 100 according to various embodiments of the present invention. And FIG. 22 is a block diagram showing the configuration of the spectacles apparatus 200 according to various embodiments of the present invention.

Referring to FIG. 20, an audio signal transmitting / receiving system 1000 according to various embodiments of the present invention includes a display device 100 and a spectacle device 200. The spectacle device 200 transmits an inquiry message and the display device 100 performs an initial association process by responding thereto. Then, the display apparatus 100 transmits a sync train packet including transmission time information of audio signal packets related to a plurality of contents for multi-view to the spectacle device 200. The audio signal packet is transmitted to the spectacle device according to the transmission time information. The spectacle device 200 receives the transmission time information of the audio signal packet for the plurality of contents from the display device 100 and receives the audio signal packet from the display device 100 according to the transmission time information And outputs the audio by synchronizing with the operation of the shutter glass according to the synchronization information included in the audio signal packet.

In order to operate as described above, the display apparatus 100 includes a signal processing unit 110, a display unit 120, a communication unit 130, and a control unit 140 as shown in FIG.

The signal processing unit 110 performs various signal processing on the received contents including the role of composing image frames of 2D (2-dimensional) contents or 3D (3-dimensional) contents. Specifically, audio data and video data are extracted from the image contents received from the source, and signals for audio data and video data are processed. In particular, the signal processing unit 110 arranges the video frames so that the video frames of the first content and the video frames of the second content, which constitute the multi-view, can be alternately displayed. For each image frame, general signal processing such as scaling and contrast ratio setting is also performed.

The signal processing unit 110 demultiplexes the audio data for each content, separates the audio data from the received video content, and performs signal processing on the audio data. The signal processing unit 110 may decode and output audio data, but may encode or decode audio data related to a specific content constituting the multi-view and packetize the audio data. The packetized audio signal is transmitted via Bluetooth to the eyeglass device worn by a user who watches a specific content.

The display unit 120 outputs the image frame configured in the signal processing unit 110. In particular, the display unit 120 outputs image frames alternately arranged in the signal processing unit 110. When the two contents are alternately displayed, the display unit 120 doubles the frame rate and outputs the images alternately. The frame rate will increase or decrease depending on the number of multi-view contents. The output timing of the video frame is synchronized with the system clock, and the system clock information is transmitted to the glasses device 200 via Bluetooth as described in the audio signal transmitting / receiving method of the present invention.

The display unit 120 may be a liquid crystal display panel, a plasma display panel, an OLED (Organic Light Emitting Diodes), a VFD (Vacuum Fluorescent Display), an FED (Field Emission Display) Display), and includes a frame rate converter and the like.

The communication unit 130 communicates with the spectacle device 200 capable of viewing the image frame. The communication unit can perform communication according to the Bluetooth standard. First, the communication unit 130 scans an inquiry message of the eyeglass unit 200. Then, the EIR packet is transmitted to the eyeglass unit 200 as a result of listening to the inquiry message. When the spectacle apparatus 200 transmits the association notification packet in response to the EIR packet, the communication unit 130 of the display apparatus transmits the baseband ACK in response thereto. When the control unit 140 generates a sync train packet, the communication unit 130 transmits the generated sync train packet to the eyeglass device 200. And transmits the ASP to the spectacle device 200 after transmission of the sink train packet for a predetermined time.

The detailed operation of the communication unit 130 is the same as that described in detail in the above-described audio signal transmitting / receiving method.

The control unit 140 controls the overall operation of the display device 100. Particularly, a sync train packet to be transmitted to the eyeglass unit 200 is configured and the communication unit 130 is controlled to be transmitted. The sync train packet includes system clock information of the display device 100 regarding the display timing of a specific content. Then, the control unit 140 controls the ASP to be transmitted to the eyeglass unit 200. Each packet is the same as that described in detail in the above-described audio signal transmitting / receiving method.

The control unit 140 includes a CPU, an MPU, a cache, and the like from a hardware viewpoint, and is composed of an operating system, embedded software, and applications in software. A control command for the operation of the display device 100 is read from the memory according to the system clock, and an electric signal is generated according to the read control command to operate the respective components of the hardware.

In order to operate as described above, the spectacle apparatus 200 includes a communication unit 210 and a control unit 220 as shown in FIG. Further, although not shown in the drawing, the apparatus further includes left and right shutter glasses, an audio output unit, and a shutter glass driving unit.

The communication unit 210 transmits an inquiry message and receives an EIR message. And transmits the association notification packet to receive the baseband offset. It also receives a sync train packet and an audio signal packet. The communication unit 210 may be implemented using Bluetooth technology. The communication unit 210 may be implemented by receiving an audio signal packet of all contents but discarding audio signal packets of contents other than contents to be viewed at present. Alternatively, it may be implemented by receiving only an audio signal packet of a specific content according to a frequency hopping map. The detailed operation of the communication unit 210 is the same as the explanation of the audio signal receiving method of the ASG, and thus the duplicate description will be omitted.

When the display device is confirmed, the control unit 220 receives the transmission time information of the audio signal packet for at least one content from the identified display device, and receives the audio signal packet from the display device according to the transmission time information .

The control unit 220 is composed of an MPU, a cache, etc. from a hardware point of view, and is composed of an operating system, an embedded software, and an application in software. A control command for the operation of the spectacles apparatus 200 is read from the memory according to the system clock, and an electric signal is generated in accordance with the read control command to operate each component of the hardware.

When the audio signal packet includes not only the audio signal but also the synchronization information of the shutter glass, the spectacles apparatus 200 can output audio in synchronization with the operation of the shutter glass.

The left and right shutter glasses (not shown) transmit or block images according to the received synchronization information. The left and right shutter glasses include a liquid crystal cell and a polarizing plate, and change the polarization characteristics of the polarized image to block a specific directional polarization component, thereby transmitting only the desired image. Conceptually, the image is transmitted when the shutter glass is turned on, and the image is blocked when the shutter glass is turned off.

The shutter glass driving unit (not shown) activates or deactivates the shutter glass independently of the left shutter glass and the right shutter glass. The shutter glass driving unit is controlled by the control unit 220.

An audio output unit (not shown) outputs the audio signal included in the received audio signal packet. If the audio signal packet is encoded and included in the received audio signal packet, decoding is performed first.

As described above, when one ASP includes the audio signals of the multi-view, only the audio signals corresponding to the respective views are extracted and output, and the remaining audio signals are ignored.

Also, when a multi-channel audio signal is included, it is separated for each channel and outputted to a corresponding speaker. When the left and right earphones are present in the eyeglass unit 200, an audio signal of a channel corresponding to each earphone will be output.

6.2.3.2. Power Saving Operation

The ASG device provides a power saving mode because the information in the ASP does not change often. After having established the synchronization, the ASG device will wake up in a plurality of ASP periods and listen to the ASP for the updater to adjust the shutter timing. If the ASP has new timing information, a copy is made to the ASG device register and the shutter of the lens is driven. Since the ASP packet may not change any value, the ASG device may continue to use the timing parameters already stored in the register of the ASG device. However, if the ASG fails to obtain an ASP packet, then the ASG can widen the receiving window slightly to get the next ASP packet.

Section 3. Shutter Device Specifications

7. Specifications for LC Shutter Devices (Specifications for LC Shutter Devices)

7.1. Summary of LC Shutter Devices specifications

Table 20 summarizes the specifications for an LC shutter device.

The following subclasses are mentioned for parameter details:

parameter Requirements Unit Remarks Operational Frequency 48, 50, 60, 72 Hz - Response Time Rise time 2.0 Max ms 10 - 90% Rise time
(Recommended) 1.1Max ms 5 - 60% Fall time 0.5 Max ms - Contrast ratio 300: 1 Min
500: 1 (Recommended) - - Average Transmittance 30 Min % - Maximum Viewing Angle (Recommendation) 20 Min deg Angle maintaining Contrast ratio> 100 Color Shift (Recommendation) 0.02 Max - for any direction of color shift in u 'v' Incident Polarization axis transmitted in Open State 70 ~ 105 deg Linear polarization
0 deg = axis that connects both eyes.

7.2. Shutter Operation timing

The shutter on / off timing is defined using "Normalized Transmittance" when the maximum transmittance of the LC shutter is defined as 100% and the minimum transmittance is defined as 0%. For this purpose, the shutter for each eye is opened or closed at 60 Hz and illuminated with a green LED.

23 is a diagram showing the shutter-on / close timing.

"Left shutter open offset + 900us" and "Left shutter close offset + 100 us" (left shutter open offset and left shutter close offset are defined in section 2) reach normal transmittance of 50% for the rising edge of the frame sync And the time it takes to do this. In the same manner, "Right shutter open offset + 900us" and "Right shutter closure offset + 100 us" (right shutter open offset and right shutterclosure offset are defined in section 2) are 50% of the rising edge of the frame sink Can be equal to the time to reach the normal transmittance. There may be a change of + -200us for each open / close offset.

The normal transmittance S for any shutter transmittance is defined by the following equation.

Packets transmitted from a specific 3D display device to an RF transceiver in the ASG need to optimize their operation in view of the characteristics of the ASG.

7.3. Common measurement conditions for LC shutter specifications (LC Shutter specifications)

Unless otherwise specified, the measurement conditions for the LC shutter specification are as follows.

7.3.1. Light source

The response time, the contrast ratio, and the average transmittance and maximum viewing angle at the maximum viewing angle are measured using a green LED light source having a dominant wavelength of 521 nm.

The white light source is used to measure the polarization axis transmitted in the color shift, open state. The white light sources are synchronized to red, green, and blue LEDs with dominant wavelengths of 635 nm, 521 nm, and 465 nm, respectively. The color temperature (Tc) of the white light source is 6500K.

7.3.2. The angle of the incident light (Angle of Incident light)

The light for measurement is incident perpendicular to the LC shutter plane.

7.3.3. Operational Frequencies

The following four frequencies are used.

(1) 48 ± 0.5 Hz

(2) 50 ± 0.5 Hz

(3) 60 ± 0.5 Hz

(4) 72 ± 0.5 Hz

7.3.4. Luminance meter

What is measured in this item is the luminance meter with the following functions.

(1) Measurement capability equivalent to the CIE 1931 standard colorimetric observer transformed to ISO 11664-1 (CIE 1931 standard colorimetric observer transformed as specified in ISO 11664-1)

(2) Ability to measure luminance with an accuracy of 0.005 cd / m2

(3) Analog voltage output for response time measurement as observed by an oscilloscope

7.4. Response time

The Rise time of the LC shutter changes from closed to open

Liver, and are specified in two ways.

Rise Time 1 ( Tr ): The time from 10% to 90% may be less than 2.0 ms.

Rise Time 2 ( Tr ): The time from 5% to 60% may be less than 1.1 ms.

The fall time of the LC shutter is defined as the transition time from the open state to the closed state and is specified as follows.

Fall time ( Tf ): The time from 90% to 10% can be less than 0.5 ms. This can be seen with reference to A.1 in Exhibit A.

Note: Longer Rise time / Fall time can be used to reduce brightness,

Degradation of the crosstalk phenomenon, and increase of the 3D crosstalk phenomenon. Thus, the response time is sufficiently short such that the shutter may be in an open state for a portion of a reasonable period of the image on the 3D display without leakage light from adjacent periods.

7.5. Contrast ratio

The contrast ratio of the shutter is defined as the ratio of the intensity of light transmitted to the closed state using the incident light of the normal LC shutter plane to the intensity of light transmitted to the open state.

A contrast ratio of 300: 1 can be obtained. However, a 500: 1 contrast ratio is strongly recommended for optimized 3D image quality. See Appendix A.2.

Contrast ratio =

Where

:Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its Open state

: Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its open state

:Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its Closed state

: Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its closed state

Note: The small contrast ratio represents the ability of the shutter to suppress the emission of unwanted light during adjacent periods, thus producing a 3D crosstalk. Basically, the contrast ratio should be higher than the number of quantization steps available in the image.

7.6. Average transmittance

The average transmittance of the shutter is defined as the ratio of the luminous intensity of light transmitted in the open state to the luminous intensity of the incident light expressed in percent. 30% or more can be obtained. See A.3 in Appendix A.

Average Transmittance in the forward direction =

Where

: Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its Open state

: Luminance of monochromatic LED light passed through a diffuser plate and an LC Shutter in its open state

: Luminance of monochromatic LED light passed through a diffuser plate without an LC Shutter

: Luminance of monochromatic LED light passed through a diffuser plate without an LC shutter

Note: The average transmittance is equal to the brightness of the 3D image viewed through the ASG device.

7.7. Maximum Viewing angle (Recommendation)

The maximum viewing angle is defined as the maximum angle (angle) at which the contrast ratio falls to 100. Can be measured by rotating the LC shutter horizontally with respect to the main axis, which is in the shutter plane and is perpendicular to the axes in contact with both sides.

The most viewing angle is degrees or more. See A.4 in Exhibit A.

Note: When the 3D glasses are worn, the angle through which the light passes through the LC shutter depends on the normal orientation of the user's face and position on the display. In general, the best performance of the LC shutter is reached when the LC shutter plane is at normal incidence. Therefore, the partial viewing angle range is defined as the viewing angle when the contrast ratio falls to a prescribed minimum.

7.8. Color shift (Recommendation)

The color shift is defined as the difference in measured value at u'-v 'coordinates by ASG with white incident light. must be less than ± 0.02 in any direction in the u'-v 'space, which is the transformation specified in ISO 11664-1 for the CIE 1931 standard colorimetric observer. See A.5 in Exhibit A.

Color shift of front view =

Where,

: chromaticity coordinates of White LED light passed through a diffuser plate and an LC Shutter in its Open state

: chromaticity coordinates of white LEDs passed through a diffuser plate and an LC Shutter in its open state

: chromaticity coordinates of White LED light passed through a diffuser plate without the LC Shutter

: chromaticity coordinates of white LED passed through a diffuser plate without LC shutter

Note: In general, the transmittance of LC shutters has wavelength dispersion. Therefore, the ASG causes a shift from the original color of the 3D display device 100. [ Such a shift is inevitable, but it should be minimized as much as possible.

7.9. The polarization axis of light transmitted by the shutter (Polarization Axis of Light Transmitted by Shutters)

When the shutter is open, the polarization axis of the transmitted light may be 90 ± 15 degrees. Refer to A.6 in Exhibit A.

Section 4. Home Use Operations

8. LC Shutter Operations for Home Enviornment

8.1. Operation mode

8.1.1. Normal (3D) mode (Normal (3D) mode)

24 is a diagram showing a normal 3D mode.

Referring to FIG. 24, when a viewer views a 3D program, the 3D glasses will operate in a normal (3D) mode. The value of the parameter "dual view mode" of the beacon will be set to 0, and the glasses will be set to a value of " left lens open ", "left lens close "," right lens open " It will operate in four states.

8.1.2. Dual View Mode (Left / Right mode) (Dual-View mode (Left / Right mode))

25 is a view showing a dual view mode.

Referring to FIG. 25, when a viewer sees one of two independent 2D programs, the ASG can operate in a dual view mode. In this mode, the "dual view mode" parameter of the beacon may be set to one. Each eyeglass can be operated in two states as shown in Fig. 22: "both lenses are open" and "both lenses are closet ". The beacon at this time may be included in the above-described audio signal packet ASP or may include an audio signal.

8.2. Association Operation

8.2.1. Association Cases

26 is a flowchart showing a combined case.

The glasses may have a combined function and the following three cases may be supported, but are not limited thereto.

Case 1 (first association): If the user initially performs association with a newly purchased ASG, the ASG does not have TV-BD address information in the register, and the first association is performed as shown in FIG.

Case 2 (resynchronization): When the user powers on an ASG that has already registered at least one piece of federation information (i.e., has TV BD address information in the register), re-synchronization is performed as shown in FIG. 26 Can be performed as shown.

Case 3 (re-association): If the user associates a used ASG that has already registered at least one association information (i.e., has TV BD address information in the res), re-association may be performed as shown in FIG. 26 .

8.2.2. Association Requirements

The glasses have a means of initializing associations such as push buttons. The glasses have at least one register that can remember the last associated TV. For home use, only one TV-BD address register is sufficient, but if used for theater, one or more theater screen registers would be handy.

The ASG is designed to be associated with the nearest TV showing the minimum fade-out threshold detected by the ASG.

9. State Transitions

Fig. 27 is a view showing the state transition of the ASG. Fig.

This section defines three states during the operation of the ASG and one of these three states. Each state is defined according to the operating frequency and its temporal variation detected by the ASG. Three operating states can be prepared in the ASG to achieve stable, safe shutter operation.

9.1. Definite State

The Definite State is a state in which the operating frequency is clear and the shutter operation is performed on the basis of the determination data for the operating frequency for which the operation has been successfully determined. The determination data is generated and fixed when predetermined conditions are satisfied. In this state, the operating frequency of the ASG is deterministic, and ASG performs the shutter open / close as determined by the frame frequency precisely. The user can appropriately recognize the image.

9.2. Maintained State

The holding state is a state in which the operating frequency is maintained and the shutter operation continues on the basis of the fixed determination data.

In this state, the ASG keeps its previous operating frequency for a while, so that ASG does not change its operation immediately upon detection of erroneous information, but operates by ASG for several reasons such as bit-error, interference or interference in RF communication Even if the frequency is erroneously detected, the user does not see the inappropriate image.

9.3. In the indefinite state,

The unconfirmed state means that the field frequency is not deterministic and the shutter operation is stopped. In this state, after the operating frequency is unstable and not determined for a certain period of time, the left and right shutters of the ASG can be opened in terms of health issues.

9.4. Conditions of the State Transitions

Hereinafter, the three conditions, that is, the determination condition, the maintenance condition, and the uncertainty condition, will be described (see FIG. 27).

9.4.1. In a confirmed state

The ASG device will remain in the determined state as long as the change in the operating frequency is within a predetermined value range. The transition to the hold state occurs when the change in the operating frequency is equal to or greater than a preset value.

9.4.2. In Maintained State (In Maintained State)

The transition to the determined state with the determined last operating frequency may occur if the change from the last operating frequency to the operating frequency is within a predetermined value range. The transition to a determined state with a newly determined operating frequency may occur when a change near a newly determined operating frequency is maintained within a predetermined value for a predetermined time. The maximum pre-set time interval may be 5 seconds. The transition to the unconfirmed state may occur if the shutter operation continues for a predetermined time without satisfying any of the two mutation conditions described above. An example of a predetermined time period is 5 seconds.

9.4.3. In the indefinite state,

Transitioning to a determined state with a newly determined operating frequency may occur when the newly determined operating frequency is maintained within a preset value for a predetermined time. The maximum pre-set time interval may be 5 seconds.

Section 5. Cinema Specifications

10. Commercial Cinema Environment

Commercial theater environments have inherent problems compared to home DTV environments. Around the world, theaters range from classical facilities, single-auditorium theaters, and mega-flex with a diverse seating capacity. In addition, the architecture includes a variety of features such as entrances, seats, balconies, and building materials that can affect the propagation of blue-pitch RF signals. Blue pitch ASG technology is also likely to be used at distances or special events where thousands of ASGs can be used simultaneously.

Therefore, in the design, implementation, and installation of the theater's Bluetooth controller system, substantially different settings may be required such as RF power, antenna pattern, antenna mounting location, and so on.

While the physical implementation in each theater auditorium may be different, the theater bluetooth system can be precisely identical to the DTV implementation in terms of federation and synchronization. The theater's Bluetooth controller can have beacon data (or audio signal packets) to ASGs in the theater with 3D synchronization signals (ie, frame syncs) from the theater projectors.

10.1. Cinema Bluetooth System

The Theater Bluetooth system may be associated with ASGs as defined herein.

In addition, the following can be applied to the theater Bluetooth controller.

- Multiple theater Bluetooth controllers can be used in the same auditorium to minimize RF output, maximize signal coverage within the theater, and minimize RF signal intrusion into adjacent theaters.

- Class I Device

The theater environment may be a Class I device.

- antenna

A direct antenna can be used to maximize signal coverage within a theater and to minimize RF interference in adjacent theaters.

An omnidirectional antenna should only be used in a single theater (auditorium).

10.2. Cinema Bluetooth ASG Association

In a theater, the ASG may be associated with a Bluetooth theater emitter and may receive synchronization information as defined in the ASG user manual herein.

10.3. Cinema Optical Requirements

Figure 25 is a diagram showing the optical timing requirements of a theater;

In addition to the optical requirements elsewhere herein, the ASG eyewear must meet the optical requirements described herein (see Table 21). If the open / close transmittance curve of the shutter does not meet the minimum requirements, significant color distortion may occur in the theater environment due to video clipping or crosstalk from previous video frames.

Symbol Characteristic Min. Max. Units Conditions T _OPEN1 Transmittance <5 % Shutter Open Offset T _OPEN2 Transmittance > 60 % Shutter Open Offset + 1100us T _CLOSE1 Transmittance > 98 % Shutter Close Offset - 200us T _CLOSE2 Transmittance <2 % Shutter Close Offset + 900us

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: Display device 200: Active glasses device

Claims (20)

A method of transmitting an audio signal of a display device,
Identifying a spectacle device based on a message received from the spectacle device;
Transmitting transmission time information of an audio signal packet relating to a plurality of contents output from the display device to the spectacle device; And
And transmitting at least one of an audio signal packet for the first content and an audio signal packet for the second content to the spectacle apparatus according to the transmission time information,
Wherein the transmission time information is at least one of transmission time information of an audio signal packet for the first content and transmission time information of an audio signal packet for the second content.
delete The method according to claim 1,
The transmitting of the transmission time information of the audio signal packet comprises:
Transmitting a sync train packet including transmission time information of the audio signal packet to the spectacle device; And
And receiving a page packet requesting retransmission of the sync train packet from the eyeglass device when the eyeglass device fails to find the sync train packet within a predetermined period of time A method for transmitting an audio signal of a device. The method of claim 3,
The sink-train packet includes:
A physical address information of the display device, logical address information of the display device, transmission time information of a next sync train packet, transmission time information of a next audio signal packet, And transmission time interval information of an audio signal packet. 5. The method of claim 4,
The sink-train packet includes:
Wherein the transmission time information and the transmission time interval information of the audio signal packet for the first content and the second content that constitute the multi view are included. The method of claim 3,
Wherein the sync train packet is transmitted at a predetermined frequency and a predetermined time interval without frequency hopping. The method of claim 3,
And transmitting the sync packet to the spectacle device when the page packet is received. The method according to claim 1,
The step of confirming the spectacle device may comprise:
Scanning an inquiry message transmitted from the eyeglass device and listening to the inquiry message;
Transmitting an Extended Inquiry Response Packet (EIR) packet including a path loss threshold to the eyeglass device;
Receiving an association notification packet requesting association from the eyeglass device if the path loss indicative of signal loss in a transmission process is less than the pass-loss threshold; And
And transmitting a baseband ACK to the spectacle device when the association notification packet is received. &Lt; Desc / Clms Page number 19 &gt; 9. The method of claim 8,
The pass-
Wherein the difference is a difference between a transmission terminal power value and an RSSI (Received Signal Strength Indicator) value of the EIR. The method according to claim 1,
The audio signal packet includes:
(At least one of the clock signal of the rising edge of the frame sync, the phase information of the rising edge of the frame sync, the dual view mode information, the frame sync period (integer or fraction) information, the audio signal, And the audio signal is transmitted to the display device. A method of receiving an audio signal of a spectacle device,
Transmitting a message to the display device to confirm the display device;
Receiving transmission time information of an audio signal packet for a plurality of contents from the display device; And
Receiving at least one of an audio signal packet of a first content and an audio signal packet of a second content from the display device in accordance with the transmission time information,
Wherein the transmission time information is transmission time information of an audio signal packet to at least one of transmission time information of an audio signal packet for the first content and transmission time information of an audio signal packet for the second content, How to receive
delete 12. The method of claim 11,
Wherein the step of receiving the transmission time information of the audio signal packet comprises:
Receiving a sync train packet including transmission time information of the audio signal packet from the display device; And
And transmitting a page packet requesting retransmission of the sync train packet to the display device when the sink train packet can not be found within a predetermined period of time. Receiving method. 14. The method of claim 13,
The sink-train packet includes:
And transmission time information and transmission time interval information of an audio signal packet for the first and second contents constituting the multi-view. 12. The method of claim 11,
Wherein the step of verifying the display device comprises:
Transmitting an inquiry message to the display device;
Receiving an EIR packet (Extended Inquiry Response Packet) including a path loss threshold corresponding to the inquiry message from the display device;
Transmitting an association notification packet requesting association with the display device to the display device if a path loss indicating a signal loss in a transmission process is smaller than the pass loss threshold value; ; And
And receiving a baseband ACK in response to the association notification packet from the display device. A method for transmitting and receiving audio signals,
Transmitting a message to the display device;
Identifying the spectacle device based on a message received from the spectacle device;
Transmitting transmission time information of an audio signal packet relating to at least one content output from the display device to the spectacle device; And
And the display device transmitting the audio signal packet to the spectacle device according to the transmission time information. A signal processing unit configured to alternately configure image frames of a plurality of contents;
A display unit for displaying the configured image frames;
A communication unit for receiving an inquiry message from the eyeglass device; And
And a controller for transmitting the transmission time information of the audio signal packet related to the plurality of contents to the spectacle device which transmitted the inquiry message and controlling the transmission of the audio signal packet to the spectacle device according to the transmission time information / RTI &gt; 18. The method of claim 17,
Wherein the transmission time information includes at least one of transmission time information of an audio signal packet for a first content and transmission time information of an audio signal packet for a second content,
Wherein,
And transmits at least one of an audio signal packet for the first content and an audio signal packet for the second content according to the transmission time information. A communication unit for transmitting an inquiry message to a display device;
Receiving the transmission time information of the audio signal packet for at least one content from the identified display device and controlling the receiving of the audio signal packet from the display device according to the transmission time information And a control unit. A display device for transmitting the transmission time information of the audio signal packet for the plurality of contents for multi-view to the spectacle device transmitting the query message, and transmitting the audio signal packet to the spectacle device according to the transmission time information; And
Receiving the transmission time information of the audio signal packet for the plurality of contents from the display device when the display device is confirmed by transmitting the inquiry message and transmitting the audio signal packet from the display device according to the transmission time information And a spectacle device for receiving and outputting the audio signal.

Images