JP2000149391A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save electric power by supplying an electric power only to a necessary reproducing system according to kinds of data to be reproduced from a disk. SOLUTION: When a DVD disk is loaded on a disk recording/reproducing part 1, a control unit 3 judges whether the disk is a DSD disk or other disks by a disk identifier, and when it is confirmed as a DSD disk an internal power source switch control part switches off a power source to a program reproducing part, a video reproducing part, and a still picture reproducing part by making off internal power source switches SW1, SW2, SW3. The reproduced data read from the disk recording/reproducing part 1 is reproduced by an audio reproduction part as an audio signal. Since the power supply to unnecessary reproduction systems is switched off when the DSD disk is reproduced like the above, electric power saving is possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for reproducing various DVD disks.

[0002]

2. Description of the Related Art Conventionally, DVD discs include Avd discs containing video data, A discs specialized for audio data and still pictures, and Ds containing only audio data.
There is an SD disk (a disk on which data is recorded using DSD which is a 1-bit signal).

[0003] In addition, since these discs may record computer program data,
The above-described disc reproducing apparatus for compatible reproduction of all discs includes an audio data reproducing unit, a still image reproducing unit,
A playback section for video data and a playback section for computer program data are provided so that all data recorded on the various types of discs described above can be played back.

[0004]

By the way, when a DSD disc is reproduced by the above-described disc reproducing apparatus, a DSD disc is reproduced.
Since only the audio data is contained in the SD disk, only the audio data reproducing unit may be operated, but at the same time, the still image reproducing unit, the video data reproducing unit, and the computer program data reproducing unit also operate. Then, there is a problem that wasteful power is consumed. In particular, the disk playback device is portable,
When the power source is a battery or the like, wasteful power consumption is a serious problem, and causes a problem that battery power is quickly consumed and a reproducible time of the device after charging or battery replacement is shortened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. An object of the present invention is to supply power only to a necessary reproduction system according to the type of data to be reproduced from a disk, thereby saving power. In particular, it is an object of the present invention to provide a portable disk reproducing apparatus capable of extending a disk reproducing time.

[0006]

Means for Solving the Problems In order to achieve the above object, a first aspect of the present invention is a computer program, an Avd disk on which some or all of video data, still picture data and audio data are recorded, and audio data. A program reproducing unit for reproducing a computer program, a video reproducing unit for reproducing video data, and a reproducing unit for reproducing still image data for compatible reproduction of an A disk on which still image data is recorded and a DSD disk on which only audio data is recorded. A disc reproducing apparatus having a still picture reproducing unit for reproducing a still image and an audio reproducing unit for reproducing audio data, determining means for determining whether or not the disk to be reproduced is a DSD disk;
A power saving means for stopping supply of power to the program reproducing unit, the video reproducing unit, and the still image reproducing unit when it is determined that the disk is a D disk.

According to the first invention, when reproducing a DSD disc, power is supplied only to an audio reproducing section for reproducing audio data, and other program reproducing sections are supplied with power.
Since the supply of power to the video reproduction unit and the still image reproduction unit is stopped, a reproduction system unnecessary for reproducing the DSD disk does not consume unnecessary power, and power can be saved.

The second invention is characterized in that a computer program, an Avd disk on which a part or all of video data, still image data and audio data are recorded, an A disk on which audio data and still image data are recorded, and audio data only. A program playback unit for playing back a computer program, a video playback unit for playing back video data, a still image playback unit for playing back still image data, and an audio playback for playing back audio data for compatible playback of the recorded DSD disc. Discriminating means for discriminating the type of data reproduced from the disc, and discriminating means among the program reproducing section, the video reproducing section, the still picture reproducing section, and the audio data reproducing section. Power to the playback unit that does not play back the In that a power saving means for stopping the feeding.

According to the second aspect, when reproducing a DVD disk, power is supplied only to a reproducing system necessary for reproducing recorded data, and power is supplied to other unnecessary reproducing systems. , The power consumption can be finely reduced.

A third aspect of the present invention is characterized in that a computer program, an Avd disk on which a part or all of video data, still image data and audio data are recorded, an A disk on which audio data and still image data are recorded, and audio data only. A program playback unit for playing back a computer program, a video playback unit for playing back video data, a still image playback unit for playing back still image data, and an audio playback for playing back audio data for compatible playback of the recorded DSD disc. A disc reproducing apparatus having a unit and a discriminating unit for judging whether or not the disc to be reproduced is a DSD disc; and when the discriminating unit judges that the disc is a DSD disc, the program reproducing unit, the video reproducing unit, Stop power supply to the still image playback unit. A power saving means, a discriminating means for discriminating a type of data reproduced from the disc when the disc to be reproduced by the discriminating means is a disc other than a DSD disc, and a program reproducing unit and a video reproducing unit. There is provided a second power saving unit for stopping supply of power to a reproduction unit which does not reproduce the data determined by the determination unit in the still image reproduction unit and the audio data reproduction unit.

According to the third aspect, when reproducing a DSD disc, power is supplied only to an audio reproducing section for reproducing audio data, and other program reproducing sections are supplied with power.
Stop supplying power to the video playback unit and still image playback unit,
Also, when playing a disc other than a DSD disc,
Since power is supplied only to a reproduction system necessary for reproducing recorded data and supply of power to other unnecessary reproduction systems is stopped, fine grained power saving can be achieved.

A fourth feature of the present invention is the above-mentioned claims 1 to 3.
In any one of the disk reproducing devices described above, the power is always supplied to the audio reproducing unit during a period in which the device is powered on, and the power is not controlled by the power saving unit.

According to the fourth aspect of the present invention, the audio signal is always recorded on any type of DVD disc, and the audio signal is always reproduced while the apparatus is turned on. Is not consumed, wasteful power is not consumed, and the power saving means can be simplified by the reduced number of objects to be controlled by the power saving means.

According to a fifth aspect of the present invention, there is provided the first to fourth aspects.
In any one of the above-described disc reproducing apparatuses, the audio reproducing unit may extract character data from reproduction data and reproduce the character data.

According to a sixth aspect of the present invention, there is provided the first to fifth aspects.
In any one of the disk reproducing apparatuses described above, the power save unit operates only when a power save instruction is issued from a user, and when there is no power save instruction, power is supplied to all reproduction systems. .

According to the sixth aspect, whether or not to perform power saving can be determined by the user.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a disk reproducing apparatus according to the present invention. The disc reproducing apparatus includes a disc recording / reproducing section 1 for reproducing a DVD disc 100, a reproducing block 2 having a plurality of reproducing sections for decoding and reproducing data read by the disc recording / reproducing section 1, a disc recording / reproducing section. A control unit 3 for individually controlling the playback unit 1 and the playback block 2 and controlling the entire apparatus, an internal power switch control unit 4 for controlling which playback unit is supplied with power, and an internal power switch control unit 4 The internal power switches SW1, SW2 that are turned on and off
SW3 (hereinafter sometimes simply referred to as SW), an operation unit 5 for inputting a user's instruction, a ROM storing a PCM decoding program 61 and a DSD decoding program 62
6. It has a remote controller 7 for remotely inputting user's instructions and a recording system 8 for recording data on the DVD disk 100.

The playback block 2 includes a program playback unit 21 for playing back program data of a computer,
It has a video reproducing unit 22 for reproducing video data, a still image reproducing unit 23 for reproducing still image data, and an audio reproducing unit 24 for reproducing audio data.

The audio reproducing unit 24 includes an audio decoder 241, a low-pass filter 242, a D / A converter 2
43 and an image converter 244. The audio reproducing unit 24 is not controlled by the internal power switch control unit 4 and is assumed to be supplied with power as long as the power of the device is on.

Next, the operation of this embodiment will be described. When the power supply of the device shown in FIG. 1 is turned on, the device is system-initialized in step 201 of FIG. 2, and then the control unit 3 in step 202 in response to a user instruction from the operation unit 5 or the remote controller 7 It is determined whether the mode is the recording mode, and if the mode is the recording mode, step 2 is performed.
In step 03, data is recorded by the recording system 8 on the DVD disk 100 set in the disk recording / reproducing unit 1.

On the other hand, if it is determined in step 202 that the recording mode is not the recording mode, the process proceeds to step 204, where the DVD disk 1 set in the disk recording / reproducing unit 1
The data recorded in 00 is reproduced.

Hereinafter, the overall operation of the apparatus shown in FIG. 1 in the reproduction mode will be described with reference to the flowchart shown in FIG. The control unit 3 reads the disc identifier of the DVD disc 100 set in the disc recording / reproducing unit 1 in step 301, and if the set DVD disc is DS
It is determined whether the disk is a D disk, an Avd disk, or an A disk. In step 302, it is determined whether or not the power save mode is set depending on the type of the set disk. If it is determined that the mode is the power save mode, the process proceeds to the internal power control process of step 312. If not, the process proceeds to the internal power control process of step 303.

In the internal power supply control process of step 303, the control shown in FIG.
After setting the PCM decoding program 61 in step 1, the process proceeds to step 304 to access the disc of the disc recording / reproducing unit 1 and start processing for reproducing a computer program, video, still image, audio data, or character data.

At this time, the audio reproducing section 24 is independent of the power supply stop control of the internal power switch control section 4 and is always supplied with power and operable when the apparatus is powered on. As a result, the audio reproducing unit 24 separates the audio data from the reproduction data input from the disk recording / reproducing unit 1, decodes the audio data with the audio decoder 241, cuts off the unnecessary high-frequency component with the LPF 242, and sets the D / D The signal is converted into an analog audio signal by the A converter 243, and the audio signal 500 is output. Also, the image conversion unit 244 is
By separating the character information data from the output of No. 1 and demodulating it, a character information signal 550 is obtained and output.

Also, the program reproducing section 21 executes step 3
At 05, the program data is separated from the reproduction data,
This is decoded in step 306 to obtain the program signal 2
00, and this is output to an external HDD (not shown) in step 307. In step 308, the video playback unit 22 separates the video data from the playback data,
This is decoded in step 309 and the video signal 300
And this is separately input to the audio playback unit 2 in step 318.
Synchronize with another signal such as the audio signal 500 reproduced in step 4.

In step 310, the still picture reproducing unit 2
3 separates the still image data from the reproduced data, decodes it at step 309 into a still image signal 400, and synchronizes it with another signal such as the audio signal 500 separately reproduced by the audio reproducing unit 24 at step 318. .
In step 319, the video signal 3 synchronized with another signal
00 or the still image signal 400 is output to a television monitor (not shown) or the like, and the process ends.

On the other hand, if it is determined in step 302 that the mode is the power save mode and the process proceeds to step 312, the internal power supply control process performs the control shown in FIG.
After setting the DSD decode program 61 in the audio decoder 241, the process proceeds to step 313 to access the disc of the disc recording / reproducing unit 1 and to perform a process of reproducing audio data or character data.

At step 314, the audio reproducing section 21 separates the audio data from the reproduced data, and decodes the audio data at step 315 to obtain an audio signal 500. If there is a character information signal at step 318, this audio information Synchronize with signal 550.

In step 316, the character information data is separated from the output of the audio decoder 241 by the audio reproducing unit 21 and decoded in step 317 to obtain a character information signal 501. To synchronize with the audio signal 500 reproduced. In step 319, the synchronized audio signal 500 and the still image signal 300 are output to a television monitor (not shown) or the like.
The audio signal 500 is output alone to an audio amplifier (not shown) or the like, and the process ends. The above D
When cueing is performed in the reproduction of the VD disc 100, F3 of the TOC file shown in FIG. 7 is used.

FIG. 4 is a subroutine showing the details of the processing shown in step 303. When the DVD disk 100 is a disk other than the DSD disk, the internal power switch control unit 4 turns on SW1 in step 401 to supply power to the program reproducing unit 21 and in step 402, the internal power switch The control unit 4 turns on the switch SW2 to supply power to the video reproduction unit 22, and
At 3, the internal power switch control unit 4 turns on the switch SW3 to supply power to the still image reproducing unit 23, thereby setting a normal mode without power saving. After that, proceeding to step 404, the control section 3 reads out the PCM decoding program 61 from the ROM 6 and sets it in the audio decoder 241 of the audio reproducing section 24.

FIG. 5 is a subroutine showing details of the processing shown in step 312. In step 501, the internal power switch control unit 4 turns off the switch SW1 and stops the power supply to the program reproducing unit 21.
At 02, the internal power switch control unit 4 turns off SW2 to stop supplying power to the video reproduction unit 22, and at step 503, the internal power switch control unit 4 turns off SW3 to reproduce the still image. The power supply to the unit 23 is stopped. Thereafter, the process proceeds to step 504, where the control unit 3 reads out the DSD decode program 62 from the ROM 6 and sets it in the audio decoder 241 of the audio reproduction unit 24.

According to the present embodiment, when a DSD disc is reproduced, unnecessary power supply to the program reproducing unit 21, the video reproducing unit 22, and the still image reproducing unit 23 is stopped, and unnecessary power is Consumption can be eliminated, and power can be saved. In particular, when the apparatus shown in FIG. 1 is portable and its power source is a battery, this power saving can extend the reproducible time of the apparatus after charging or after battery replacement.

In the above-described embodiment, the power save mode is always set when reproducing the DSD disk. However, only when the user designates the power save mode by the operation unit 5 or the remote controller 7, the DSD disk is reproduced. The power save mode may be set at the time of reproduction.

Although the present embodiment is provided with the recording system 8, it should be called a disk recording / reproducing apparatus, but the present invention is intended to save power when reproducing a disk. The presence / absence is irrelevant to the realization of the invention, and the disc recording / reproducing apparatus operates as a disc reproducing apparatus during reproduction.

FIG. 6 is a flowchart showing another embodiment of the disk reproducing apparatus of the present invention. However, since the configuration of this example is the same as that of the embodiment shown in FIG. 1, the configuration of FIG. Also in this example, the control unit 3 determines whether or not the set DVD disk 100 is an A disk in step 601, based on the identifier of the DVD disk 100 set in the disk recording / reproducing unit 1. If so, step 6
Go to step 05, otherwise go to step 602.
In step 602, the control unit 3 determines whether or not the mode is the power save mode based on a user's instruction from the operation unit 5 or the remote controller 7. If the mode is the power save mode, the process proceeds to step 603 and the power save mode is not set. In this case, the process proceeds to step 607.

The control unit 3 proceeds to step 607, instructs the internal power switch control unit 4 to perform the normal mode (SW1, SW2, and SW3 are all on), and reproduces the DVD 100.

On the other hand, when the control section 3 proceeds to step 603, the currently set DVD disc 100
Judge whether it is an SD disk (SACD disk),
In the case of a DSD disk, the process proceeds to step 604, where a complete power save mode instruction is issued to the internal power switch control unit 4, and the process ends.

As a result, the internal power switch control unit 4 turns off the switches SW1, SW2, and SW3, and turns off the program reproduction unit 21, the video reproduction unit 22, and the still image reproduction unit 23.
In order to stop the supply of power to the audio playback unit 24, only the audio playback unit 24 is supplied with power in the playback block 2.

On the other hand, if the currently set DVD disk 100 is not a DSD disk, the control section 3 proceeds to step 605 to determine the type of data recorded on the currently set DVD disk 100,
In step 606, the power save mode corresponding to the type of data recorded is instructed to the internal power switch control unit 4 and the process is terminated. As a result, the internal power switch control unit 4 turns on or off the switches SW1, SW2, and SW3 according to the designated power save mode.

Further, if it is determined in step 601 that the disc is the A disk, the control section 3 proceeds to step 605 to perform the same processing as described above, and in step 606, the selected power save mode is set. , DVD disc 100
Perform playback.

Here, the processing in the power save mode in step 606 will be described in more detail. In step 605, if the data recorded on the DVD 100 is program data, still image data, and audio data, the internal power switch control unit 4 turns on the switches SW1, 2, and 3, and the program reproduction unit Power is supplied to the video playback unit 21, the video playback unit 22, and the still image playback unit 23 so that program data, video data, still image data, and audio data can be played back. This results in the same as in the normal mode.

Next, when the data recorded on the DVD 100 is video data, still image data and audio data, the internal power switch control unit 4 turns off the switches SW1 and turns on the switches SW2 and SW3. It supplies power to the video playback unit 22 and the still image playback unit 23,
Video data, still image data and audio data can be reproduced.

In the data recorded on the DVD disk 100, if only video data is not recorded, only SW2 is turned off, and if only still image data is not recorded, only SW3 is turned on. Off
The same power save as described above is performed.

Next, when the data recorded on the DVD 100 is still image data and audio data, the internal power switch control unit 4 switches the switch SW
1 and 2 are turned off, SW3 is turned on, and power is supplied to the still image reproducing unit 23 so that still image data and audio data can be reproduced.

When only program data is recorded in addition to audio data among data recorded on the DVD disk 100, only SW1 is turned on, and only video data is recorded. Is S
Only W2 is turned on, and the same power save as described above is performed.

Further, when the data recorded on the DVD disk 100 is only audio data, the internal power switch control unit 4 turns off the switches SW1, 2, and 3, and the program reproduction unit 21, the video reproduction unit 22 Then, the supply of power to the still image reproducing unit 23 is stopped so that only the audio data can be reproduced.

After the above operation is performed by the internal power switch control unit 4, the control unit 3 reads data recorded on the DVD disk 100 from the disk recording / reproduction unit 1 and inputs the data to the reproduction block 2. By doing
The DVD 100 is reproduced in the same manner as in the previous embodiment.

According to the present embodiment, the DVD disc 1
By supplying power only to the necessary reproducing unit in accordance with the type of data recorded in 00, it is possible to save power more finely than in the previous embodiment, and obtain the same effect. be able to.

[0049]

As described above in detail, according to the disc reproducing apparatus of the present invention, power is supplied only to a necessary reproducing system according to the type of data reproduced from the disc, thereby achieving power saving. In particular, the playback time of a portable disk can be extended.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a disc reproducing apparatus according to the present invention.

FIG. 2 is a flowchart showing an operation of the apparatus shown in FIG. 1 when the power is turned on.

FIG. 3 is a flowchart showing an overall operation in a reproduction mode of the apparatus shown in FIG. 1;

FIG. 4 is a subroutine showing details of a process shown in step 303 of FIG. 3;

FIG. 5 is a subroutine showing details of a process shown in step 312 of FIG. 3;

FIG. 6 is a flowchart showing another embodiment of the disc reproducing apparatus of the present invention.

FIG. 7 is a diagram showing a disc structure of a DVD disc.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 disc recording / playback unit 2 playback block 3 control unit 4 internal power switch control unit 5 operation unit 6 ROM 7 remote control 8 recording system 21 program playback unit 22 video playback unit 23 still image playback unit 24 audio playback unit 61 PCM decode program 62 DSD decode program 100 DVD disk 241 Audio decoder 242 LPF 243 D / A converter 244 Image converter SW1 to SW3 Internal power switch

Claims (3)

[Claims] 1. A first disk on which part or all of a computer program, video data, still image data, and audio data is recorded, a second disk on which audio data and still image data are recorded, and only audio data are recorded. In order to play the third disc compatible,
Playback is performed in a disc playback apparatus having a program playback unit that plays back a computer program, a video playback unit that plays back video data, a still image playback unit that plays back still image data, and an audio playback unit that plays back audio data. Determining means for determining whether or not the disk is the third disk; and when the determining means determines that the disk is the third disk, the program reproducing unit, the video reproducing unit, and the still image reproducing unit And a power saving means for stopping the supply of power. 2. A first disk on which a computer program, video data, still image data, and part or all of audio data are recorded, a second disk on which audio data and still image data are recorded, and only audio data are recorded. In order to play the third disc compatible,
In a disc reproducing apparatus having a program reproducing unit for reproducing a computer program, a video reproducing unit for reproducing video data, a still image reproducing unit for reproducing still image data, and an audio reproducing unit for reproducing audio data, Determining means for determining the type of data to be reproduced; power to a reproducing unit which does not reproduce the data determined by the determining means among the program reproducing unit, the video reproducing unit, the still image reproducing unit and the audio data reproducing unit And a power saving means for stopping supply of the disc. 3. A first disk on which a computer program, video data, still image data, and part or all of audio data are recorded, a second disk on which audio data and still image data are recorded, and only audio data are recorded. In order to play the third disc compatible,
Playback is performed in a disc playback apparatus having a program playback unit that plays back a computer program, a video playback unit that plays back video data, a still image playback unit that plays back still image data, and an audio playback unit that plays back audio data. Determining means for determining whether or not the disk is the third disk; and when the determining means determines that the disk is the third disk, the program reproducing unit, the video reproducing unit, and the still image reproducing unit A first power saving means for stopping the supply of power to the disc, and a discriminating means for discriminating a type of data reproduced from the disc when the disc to be reproduced by the discriminating means is a disc other than the third disc. Means, the program reproducing unit, the video reproducing unit, the still image reproducing unit, and the audio data reproducing unit. A disk reproducing apparatus comprising: a second power saving unit that stops supplying power to a reproducing unit that does not reproduce the data determined by the determining unit.