JPH01268384A - Information transmission equipment - Google Patents

Abstract

PURPOSE:To easily carry out an override operation by adding a function for judging the priority of a pluality of signal generators for generating a forcibly receiving signal. CONSTITUTION:The priority is defined to VTR 141-143 for reproducing an overriding video signal is set. An operator, when the override is operated, recognizes a current state and requires no necessity for judging whether the overriding can be executed or not to easily carry out the override operation. When a plurality of the VTRs are selected to override, the override is successively executed automatically according to the priority, an operation for successively executing the override is simplified.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Essentials of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem (Fig. 1) F. Effect G. Example G1 Description of central control unit G2 Terminal device Description H Effect of the invention A Industrial application field The present invention relates to an information transmission device that transmits information such as a video signal from a central control device to a terminal device provided in a passenger seat of an aircraft, train, bus, etc. Regarding.

B. Summary of the Invention The present invention provides a method for generating a forced reception signal from a signal generation device with a higher priority when there are a plurality of video signal and audio signal generation devices for override (forced reception) and when selecting a plurality of signal generation devices. By transmitting more information, the operator can easily perform an override operation.

C. Prior Art The prior art, for example US Pat. No. 4,647,980, describes the provision of individual video displays in passenger seats of vehicles such as aircraft. In other words, video displays are individually installed in passenger seats, multiple video signals are transmitted in parallel to these video displays, and each video display selects and displays one of the signals. be.

D. Problems to be solved by the invention In such a transmission device, the central control device has instructions on how to put on a life jacket, how to write entry procedures, airport information, tourist information, etc.
If there are multiple playback devices such as video tape recorders that play back video signals for overriding content such as physical display of in-flight shipping, and assuming that there is no function to determine priority, when an operator performs an override operation,
Each time, I had to check the current status and decide whether I could override it or not.0For example, when the entry procedure form was overridden, the operator suddenly switched to the airport guidance override. If this is incorrect, there is the inconvenience of giving an unpleasant impression to the passengers.

The present invention takes these points into consideration and facilitates the operator's override operation.

E. Means for Solving the Problems The present invention provides a central control unit with a plurality of signal generators that generate forced reception signals, a determination unit that determines the priority order of the plurality of signal generators, and a plurality of signal generators that generate forced reception signals. and a selection means for selecting a device, and when the selection means selects a plurality of signal generation devices, the determination means determines that the compulsory reception signal from the signal generation device is transmitted based on the priority order. be.

F. Effect In the above configuration, a function is added to determine the priority of multiple signal generators that generate forced reception signals, so when an operator performs an override operation, he or she can check the current status and override. There is no need to judge whether or not.

Also, when specifying multiple overrides, the overrides are automatically made one after the other in order of priority.

G. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1. This embodiment is an example applicable to the transmission of video signals, audio signals, etc. in an aircraft.

Description of G1 central control device In Fig. 1, (1) is a central control device installed in the crew cabin, etc. (11) to (13), (14)
t) to (14) are video tape recorders < v
V'rR (11) to (13) are usually loaded with tape cassettes on which movies, etc. are recorded.VTRs (141) to (143) are loaded with override video. A tape cassette with recorded signals is loaded.0 For example, a tape cassette with instructions on how to write immigration procedures is loaded into the V'l'R (141), and the VTR (lh
) is loaded with a tape cassette containing airport information, and a VTR (143) is loaded with a tape cassette containing tourist information. These VTRs (11) to (13)
), (14t) to (143), respectively, are supplied to the system controller (10).

Further, (15) is a still image playback device, (16) is a television tuner, and (17) is a video camera. The still image playback device (15) is a still image recording medium (C
D-ROM, etc.). Video camera(
17) is installed inside the cockpit and, for example, takes pictures of takeoff and landing. Video and audio signals obtained from the still image player (15), television tuner (16), and video camera (17) are supplied to the system controller (10).

Further, (18) is a microphone for announcements. The audio signal obtained from this microphone (18) is supplied to the system controller (10).

VTR (1,1) ~ (13) , (1
4t) ~' (14)), still image player (15), TV tuner (16), video camera (
17) is supplied with a control signal from a master controller (19) having a microcomputer via a system controller (10) to control its operation. Here, (20) is the keyboard, (21
) is a monitor receiver.

Also, normally, from the system controller (10), V
'rR (11) to (13), still image reproducing machine (15),
Video signals obtained from a television tuner (16) and a video camera (17) are output, and these video signals are supplied to a modulator/demodulator (29) where they are modulated in frequency bands of different channels. When override is turned on by operating the keyboard (20), panel switch of the system controller (10), touch switch on the screen of the monitor receiver (21), etc., the VTR (11)
V1'R (14t) in place of the video obtained from I
The video signal obtained from the one selected from ~(143) is output from the system controller (10), *i
The signal is supplied to the foot opener (29) and modulated.

Also, normally, from the system controller (10), V
TR (11) ~ (13), Still image playback machine (15)
, TV tuner (16) and video camera (17)
The audio signals obtained from the C
It is supplied to the encoder (28) from the A port.

When the override is turned on, the VTR (11)
V'rR(14x) ~
The audio signal obtained from the one selected from (143) is output from the system controller (lO) and supplied to the encoder (28).

Here, V'rR(141) ~(14a) niha,
Priorities are determined in advance in this order. Therefore, VT
R(14t) to (143) (D) When another VTR is selected and override is turned on in an override state where a video signal or an audio signal is being transmitted from either D, the VTR selected later When the priority is lower, the video and audio signals from the VTR selected first are transmitted as they are, and then the video and audio signals from the VTR selected later are transmitted, while the video and audio signals from the VTR selected later are transmitted. When the selected ``rR'' has a higher priority, the video signal and audio signal from the VTR selected later are immediately transmitted, and the video signal from the VTR selected earlier is then transmitted. , audio signals are transmitted.Furthermore, when multiple VTRs are selected at the same time and override is turned on, the VTR with the highest priority is
The video signal and audio signal from 'l''R are automatically transmitted sequentially.

When the announcement is turned on by operating the keyboard (20), panel switch of the system controller (10), touch switch on the screen of the monitor receiver (21), etc., an audio signal obtained from the VTR (11) is used. The audio signal obtained from the microphone (18) is output from the system controller (10) and sent to the encoder (28).
supplied to

Incidentally, when the override is turned on or the announcement is turned on, V'T'R (11) to (13) and the audio playback devices described below are put in a pause state.

Moreover, (25) and (26) are sound reproducing machines each equipped with three compact disc players and three tape recorders. These audio reproduction Ml (25)
and (26) are supplied with control signals from the master controller (19) via the system controller (10), and their operations are controlled. Audio signals obtained from these audio reproducers (25) and (26) are supplied to an encoder (28).

Further, (27) is a data transmitter, and this data transmitter +ff1 (27) is connected to a master controller (19).
A control signal is supplied from the system controller (10) to control its operation.

This data transmitter (27) includes a menu ROM cartridge (22) in which data such as meal menus is stored, and game ROM cartridges (23a) to (23+K) each in which data for different television games is stored.
A program booter is read from the data, and processing such as adding an error correction code to this data is performed. Program data output from this data transmitter (27) is supplied to an encoder (28).

In addition, the master controller (19) outputs control data according to operations using the keyboard (20), panel switches of the system controller (10), touch switches on the screen of the monitor receiver (21), etc. The data is provided to an encoder (28). This control data is, for example, data that puts the terminal device in a forced reception state, data that requests predetermined data from the terminal device, and the like.

Further, the encoder (28) is configured using a conventionally well-known cable digital audio/data transmission system (CAI) A.
system).

The CADA system time-division multiplexes multiple digital audio signals and transmits them using the available CATν television channel band (6MH2), making it possible to transmit music etc. extremely efficiently without sacrificing sound quality. It is a system. Although not shown, the encoder (28) is an A/D
It is configured with a converter and a shift register, and a plurality of audio signals are converted into digital signals by an A/D converter,
This digital data, the program data output from the data transmitter (27), and the master controller (
19) The control data output from the shift register is input in parallel to predetermined positions of the shift register, and is output serially from the shift register at high speed, thereby performing time division multiplexing. Ru.
゛In this example, due to the amount of information, the encoder (28)
Two systems of time-division multiplexed signals are outputted, and these multiplexed signals are supplied to a modulator/demodulator (29) where they are modulated in different channel frequency bands.

FIG. 2 shows the formants of two systems of time division multiplexed signals output from the encoder (28). This signal format is an improved version of the signal format proposed in Japanese Patent Application No. 58-210356 and Japanese Patent Application No. 59-170925.

That is, this multiplexed signal is a serial binary signal St consisting of a large number of superframes, as shown in FIG.
1 to F256, and the l frame is composed of 168 bits as shown in FIG.
The period is 1/32k)Iz. Each frame has, in order, an 8-bit synchronization code 5YNC, a 4-bit service bit SB, a data packet Pct' of 1 bit x 4 ~PCTII, and a 7-bit x 4 error correction bit ECC. ing.

In this case, as shown in FIG.
2 to F256 are frame sync FS, and super frame sync SS and frame sync S have different bit patterns.

Further, although the details of the service bit SB will be described later, one unit is n frames, and the service bit SB includes data such as a command and a seat number.

Further, each of the data packets PCT^ to PCTD is composed of 32 bits, and independently constitutes four packets PCTA to PCTO. And this packet PCTA-PCTO
As shown in FIG.
It is considered to be an excuse.

Therefore, there are four packets PCTA in one frame.
~PCTD and since each packet has four channels M1 to M4, a total of 16 channels of audio signals can be transmitted simultaneously in a time-division manner using one signal St.

In addition, each channel has a sampling frequency of 32k.
Since the number of quantization bits is 8 bits, it is almost the same standard as PCM audio in 8 mm video.

In addition, ROM cartridges (22), (23a
The program data from ) to (23g) is made into a bit-sequential time-division signal in the data transmitter (27), and this signal is used as it is as one of the 16 channel signals, and the data is output from the last bit. When the first bit is sent out, the first bit is sent out again.

Note that one channel is 8 bits, and ROM cartridges (22), (23a) to (23g)
) is 8, so this ROM cartridge (22)
In the channel that transmits the program data from (23a) to (23g), the 1st bit to 8th focus is )<0M cartridge (22), (23a
) to (23g), and the transmission speed of each data is 32 Kbps.

Further, the error 1 correct code ECC performs error correction on each of PCTA-PCTD (each bit is a bucket).

Since the signal St has the above format, its transmission bit rate is 168 bits x 32! Iz = 5.4Mbps
Since 1/2 of the frequency is the Nyquist frequency, the signal St can be transmitted if there is a bandwidth for the video signal.

Further, the service bit SB is used, for example, in the formant shown in FIG. That is, service bit SB
There are 4 bits per frame, and these 4 bits are sequentially designated as bits B1 to B4. As schematically shown in Figure A, if the 77 consecutive frames are arranged vertically in frame units as one set, the service bit Shl is the size of 77 bits vertically x 4 bits horizontally. It's going to be.

Therefore, as shown in Figure B, service bit sB-
? If the 77 bits are taken out in the CM direction and taken as one channel, the first channel CHNA is formed by 771 bits of bit B1, and similarly, each 77 bits of bits 82 to B4 are
2nd to 4th channels CIINB-CHN by 7 pieces
D is formed.

Then, as shown in FIG. B, channels CHNA to C
Each of HND is divided into 7 words of 11 bits each -)IOA-WRI)G, and as shown in Figure C, the first bit in each word is a start bit 5TRT with a "0" level. , the leading 8-bit node is used as the data bit RO TBT, the next 1 bit is used as the parity bit P)lTV, and the last 1 bit is used as the "l" level stop bit 5TOP.

In each of the channels CHNA-CHND, there is one data pitro TBT per word, and there are seven words per '/7 frame, so the data bits l] TBT are fixed (fixed (7 bytes) per '17 frame). Therefore, the total number of data bits DTBT is equal to 1 byte x 4,000 channels.

Of these data bits DTBT, the data bits DTBT of the second channel C)INH have a header HDHR in which the first byte has a predetermined bit pattern ("AA" in hexadecimal value), as shown in the figure. , the second byte is the command CMD, which is used to identify up to 256 types of instructions. Further, the third and fourth bytes are address AD)is indicating the seat number (terminal device number), and the fifth and sixth bytes are status information 5TTS indicating data or parameters accompanying the command CMD.
The last byte is taken as checksum C3.

In this case, control data from the master controller (19) is sent out in correspondence with the command CMI) in the third diagram. For example, when override is on, the master controller (19) generates control data that puts the terminal device in a forced reception state,
It is sent in correspondence with the command CMD part. Also,
The address ADR5 is randomly changed by the user's keyboard operation, thereby specifying any or all of the plurality of terminal devices.

Returning to FIG. 1, from the modulator/demodulator (29), 6-channel signals related to the video signal and the encoder (28)
A frequency multiplexed signal consisting of two channels of signals related to the output of . The other end of this leaky cable (2) is connected to a terminating resistor (2a) for termination.

This leaky cable (2) is, for example, a coaxial cable with a spiral cutout around it to increase the amount of signal leakage.

In addition, terminal devices (6a), (6b), which will be described later,
The signals supplied from ... to the leaky cable (2) are demodulated by the modem (29) of the central control unit (1), and then sent to the CAD via the encoder (2B) and system controller (10). master controller (1
9). Although not mentioned above, the master controller (19) performs processing such as aggregation of the data.

Description of G2 Terminal Device Next, the configuration of the terminal side will be described. The leaky cable (2) mentioned above is stretched throughout the cabin of the aircraft as shown in Figure 4, and the seats for each passenger are divided into three seats (9a) in one set of seat units (9). ),
(9b) and (9c) are provided, and these seat units (9) are arranged to be divided into left and right sides with a central aisle in between. For each seat unit (9), there are antennas (4a) and (4b) for capturing the transmission signal SMF leaking from the leaky cable (2).

(4c), ... are provided.

In Figure 1, each antenna (4a), (4b)
.

The transmission signal SMF captured by (4c), ... is sent to distributors (5a), (5b), (5c),
The distributed signals are then distributed to each seat (9a) in each seat unit (9).

(9b), (9c) terminal device (6
a).

(6b), (6c), etc.

In this example, the seat (9a) corresponding to the terminal device (6a) is set as seat number 1, and the seats corresponding to the terminal devices (6b), (6c), (6d), etc. are assigned seat numbers in order. 2.3.4.....

These terminal devices (6a), (6b), (6c
), = is for each seat (9a), as shown in Figure 4.
(9b) and (9c) are arranged on the back side. In addition, this terminal device (6a) (6b), (6c)
,..., the armrests may be placed in the section.

Terminal devices (6a), (6b), (6c)
, ” are all configured in the same way, so the terminal device (6
A) will be explained, and explanations of other parts will be omitted.

The transmission signal SMF distributed by the distributor (5a) is supplied to a television tuner (61) and a CAD tuner (62). In the TV tuner (61), the transmission signal SMP
Among them, it is configured to be able to selectively receive signals from six channels related to video signals. The video signal output from this TV tuner (6I) is then sent to the monitor receiver (63).
) and the image is displayed.

In addition, in the CADA tuner (62), the transmission signal SMF
Of these, two channels of signals related to the output of the encoder (28) can be selectively received.

The time division multiplexed signal output from this CADA tuner (62) is supplied to a CADA decoder (64). The CAD^ decoder (64) is the above-mentioned CA
I) The A encoder (28) is configured to operate in substantially the opposite manner.

That is, control data is extracted from the time division multiplexed signal.

Moreover, the above-mentioned TV tuner (61) also includes a decoder (
64) and is controlled by the terminal side controller (66), and normally a channel is selected according to the key operation of the operation key (67), but when override is on,
A predetermined channel for override is forcibly selected based on the control data.

In addition, the decoder (64) is connected to the terminal side controller (66).
Normally, the audio signal or program data corresponding to the key operation of the operation key (67) is extracted from the time division multiplexed signal, but when the override is on or the announcement is on, the override is controlled based on the control data. audio signals for use or announcements are forcibly extracted.

The α-oki signal that is 1-transformed from the decoder (64) is supplied to the audio output terminal (66a) through the terminal measurement controller (6(i); (□l). ,...Headphones (68) are connected to the audio output terminal (66a).The program data taken out from the decoder (64) is supplied to the personal computer (65)' and stored in the memory (65a). ). Also, the game terminal (66b) is written from the terminal side controller (66).
) is derived. A joystick (69) is connected to this game terminal (66b).

The non-volatile memory (not shown) of the decoder (64) also includes an ID unit (8a) via transmission@(7a).
The sheet number data supplied by the controller is stored. The forced reception control based on the control data as described above is actually performed only by the terminal device of the seat number designated by the address ADRS.

Further, data is transmitted from the terminal device (6a) to the central control device (1). For example, when the control data requests data, the CPU (not shown) of the decoder (64) generates corresponding data, adds sheet number data to it, and transmits the data.
1Mk (7a). And this transmitter (7
In a), the transmission signal SMF from the central control value 'fl(1) side
After being modulated into a frequency band other than the frequency band of , the signal is supplied to the leaky cable (2) via a distributor (5a) and an antenna (4a).

As a result, the data is supplied from the leaky cable (2) to the modem (29) of the central control unit (1), where it is demodulated and sent to the encoder (28) and the system controller (1).
0) to the master controller (19). In this case as well, C is actually performed only for the terminal device whose seat number is specified by the DNS.

Moreover, FIG. 5 shows an example of the configuration of the panel of the terminal device (6a). The monitor image receiving tM (63) using a flat cathode ray tube is placed on the left side, and the operation keys (
67) section is placed. In this operation key (67) part,
Channel display <67a), Channel up key (67b), Channel down key (67c),
Game selection key (67d), TV selection key (67
e), menu selection key (67f), enter key (6'/g), audio selection key (67h), volume up key (67i) and volume down key (6'7j)
) are provided.

In this case, press the TV selection key (67e), channel down key (67c), channel up key (
By pressing 67b) in sequence, the television channels can be changed in sequence. That is, the TV tuner (61) changes the receiving channel and the audio signal output from the CADA decoder (64), and the screen of the corresponding channel is displayed on the monitor receiver (63), and the audio output terminal (66a) A corresponding audio signal is output. Here, when the combined signal is in two languages, two channels are assigned to one video signal screen, and the first
The channel outputs an audio signal in the language of the first country, and the second channel outputs an audio signal in the language of the second country.

Also, press the audio selection key (67h), channel down key (67c), channel up key (
67b), the music channels can be changed in sequence. That is, the audio signal output from the CADA decoder (64) is changed, and the audio signal output from the audio output terminal (66a) is changed.
The audio signals output from the audio playback devices (25) and (26) are sequentially output.

Also, when the game selection key (67d) is pressed, the personal computer (65) selects the TV tuner (61).
) A display signal indicating the type of ROM cartridge (23a) to (23g) is supplied to the monitor receiver (63), and the type of video game is displayed on the monitor receiver (63). And channel down key (67c)
, select a game by moving the cursor on the display screen using the channel up key (67b), and then press the enter key (67g) to display the selected ROM cartridge (23) from the personal computer (65).
The video signal and audio signal based on the data from a) to (23g) are supplied to the monitor receiver (63) and the audio output terminal (66a), respectively, and the monitor receiver (
The game screen is displayed on the screen 63), and the game sound No. 13 is outputted on the audio output terminal (66a).

According to this example, priority is set for the override videos (VTRs (141) to (14) that generate No. 4 to No. 6), so that when performing an override operation, the operator can It is no longer necessary to check the status of the VTR to determine whether override is possible, and the override operation can be performed easily.Also, when selecting multiple VTRs and turning on override, override is automatically set in priority order. Since the overrides are performed continuously, there is an advantage that the operation is easy when overriding is performed continuously.

In addition, in the above embodiment, V ``l' R(14t
) to (lh), therefore, priority is determined based on the existence of overrides. For example, when overriding is performed for each zone by specifying address 80R3, priority must be determined for each zone. I can do it.

Furthermore, for example, when overriding is performed on the entire area or a predetermined zone by specifying the address AllR5, priority can be set for the entire area or the predetermined zone.

In addition, in the above embodiment, VTR (14t) to (
143), but VTR (1
In addition to 4z) to 4z) to (lh), the priority order may be determined by including the microphone (18) and the like.

Further, in the above embodiment, the number of VTRs for reproducing the override video signal is three, but it goes without saying that the number is not limited to this.

H Effects of the invention According to the invention described above, a function is added to determine the priority order of a plurality of signal generators that generate forced reception signals, so when an operator performs an override operation, the current state There is no longer a need to check and analyze whether or not an override can be performed, and when multiple overrides are specified, the overrides are automatically performed in succession in order of priority, making it easy for the operator to perform override operations. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing the signal format, FIG. 4 is a diagram showing the arrangement of the embodiment, and FIG. 5 is a diagram showing the arrangement of the terminal device. It is a figure showing a panel surface. (11 is the central control unit, (2) is the leaky cable, (
4a>, (4b), <4c) are antennas,
(5a). (51+), (5c) is a distributor, (6a),
(6b), (6c). ... is a terminal device, (7a), (7b),
(7c) is a transmitter, (8a), (8b),
(8c) is 10 units, (10) is a system controller, (lla) to (14a) are indicators, (11), (12), (13),
(14z) to (143) are video tape recorders, (
15) is a still image player, (16) is a TV tuner,
(17) is a video camera, (]8) is a microphone, (
■9) is the master controller, (20) is the keyboard, (21) is the monitor receiver, (22), (23a
) ~ (23g) is) < OM cartridge, (25
), (26) is audio playback (28) is CAD
8-ecoder, (29) is a modem, (61) is a TV tuner, (62) is a CAD 8-ecoder, (63) is a monitor receiver, (64) is a CAt1 8-decoder, (65)
is a personal computer, (65a) is a memory, (6
6) is a terminal side controller, and (67) is an operation key.

Claims (1)

[Claims] In an information transmission device that transmits information from a central control device to a plurality of terminals, the central control device includes a plurality of signal generation devices that generate forced reception signals, and a plurality of signal generation devices that generate forced reception signals. comprising a determining means for determining the priority order and a selecting means for selecting the plurality of signal generating devices, and when the selecting means selects the plurality of signal generating devices, the determining means determines which one has the highest priority. An information transmission device characterized in that the information is transmitted by a forced reception signal from a signal generator.