JP2000050209A - Video reproduction method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain repetitive reproduction without sense of incongruity by immediately obtaining a video output, even when a repeat-block start point A is located at any point. SOLUTION: In the video reproduction method, where a video reproduction circuit 14 reproduces video data arriving intermittently, the video data having arrived immediately before the time when no video data arrive are used repetitively to conduct interpolation reproduction, when a 1st command giving a 1st search point is received, the video data given to the video reproduction circuit 14 at present are saved temporarily in a save memory 12, and then interpolated reproduction is executed. In the case of receiving a 2nd command transited to the 1st search point, the video data in the save memory 12 are given to the video reproduction circuit 14 to interpolate the video output until succeeding video data are received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video reproducing method effective for a digital video disk, a so-called DVD reproducing device or the like.

[0002]

2. Description of the Related Art In recent years, DVD video players have been developed and marketed. In the DVD system, in addition to playing discs containing movies, discs containing karaoke,
You can enjoy the disc containing the game.

[0003]

Here, for example, when enjoying karaoke or game software, a repeat playback function may be required. The repeat playback function is a function for repeatedly playing back a section of the disc. Here, the section start point A and the section end point B are designated, but there is a point to be noted in that the video output is stably obtained.

[0004] For example, in the case of karaoke or the like, video data for a still image as a background video is intermittently recorded on a disk, and the interval between the video data for a still image and the video data for a still image is immediately before. The still image data read immediately before is repeatedly used until the next image data for still image is read and stored in the memory.

Here, when the above-mentioned repeat function is operated, if the repeat section start point A does not coincide with the recording position of the still image video data, there is no data to be output. Therefore, in the conventional device, the repeat section start point A
The video data is returned to the recording position of the video data for still image before and the background video signal is output, and the output of the audio signal is obtained only when the repeat section start point A is reached.
As a result, the time until the audio signal of the repeat section start point A is obtained may be irregular or long.

Accordingly, an object of the present invention is to provide a video reproducing method capable of immediately obtaining a video output regardless of the position of the repeat section start point A.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a video reproducing method for reproducing intermittently arriving video data and data reproduced together with the video data by a video decoder. When there is a first command input designating a search point of the data, the video data currently given to the video decoder is temporarily saved in a save storage unit, and the first search point is searched. When there is a second command input to the effect, the data at the search point is searched, and the video data in the save storage unit is supplied to the decoder to output a video.

According to the above method, even if the position of the video data does not match the position of the first search pointer,
The video data output can be immediately obtained even if the processing shifts to the search pointer.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The data read from the optical disk is subjected to error correction by an error correction circuit, and is demodulated to a predetermined number of bits. In the DVD, the demodulated output includes a pack of main video data, sub-video data, audio data, and the like. These packs are standardized to a predetermined byte length, have a pack header, and include a packet having a packet header. The pack header and the packet header include management and control data representing the type and contents of the data in the packet (for example, see Japanese Patent Application Laid-Open No. 8-273304 filed by the present applicant).

Now, description will be made assuming that data from an optical disk on which audio software such as karaoke or music is recorded is handled. On this kind of optical disc, video data for a still image as a background video is intermittently recorded. In another data area, data of each channel for karaoke or music is recorded.

Each packet is sorted by the demultiplexer according to the identification information, and the main video data appears at the input unit 11. In the case of the audio reproduction mode, the main video data of the input unit 10 is temporarily stored in the first memory 11, and is repeatedly used. The video data output from the first memory 11 is input to the main video reproduction circuit 14 via the control circuit 13. The main video reproduction circuit 14
For example, an MPEG decoder decodes and outputs main video data.

On the other hand, the video data stored in the first memory 11 can be stored in the second memory 12. The switching control of the memory operation and the data transfer control at this time are executed by the data transfer control circuit 15.
The video data stored in the second memory 12 is also read out under the control of the write / read control circuit 13 and can be supplied to the main video reproduction circuit 14.

The control circuit 16 is a system control unit for controlling the whole, and can fetch commands based on user operations, and can also analyze the management and control data described above.

FIG. 2 is a flowchart for explaining an operation example of the above-mentioned reproducing apparatus. Now, it is assumed that an optical disk on which audio software such as karaoke or music is recorded is being reproduced. On this kind of optical disc, video data for a still image as a background video is intermittently recorded. In another data area, data of each channel for karaoke or music is recorded.

During normal continuous reproduction, the main video data is
The data is temporarily stored in the memory 11 and supplied to the main video reproduction circuit 14 via the write / read control circuit 13 (steps A1 and A2). Although not shown, the reading position with respect to the optical disk advances sequentially, so that the reproduction of music is continued.

Here, if there is a portion (repeat section start point A) that the user wants to repeat, and the start point is specified by operating the remote controller, the video data (still image data in the memory 11) that is currently performing still reproduction data)
Is transferred to the memory 12 (steps A3 and A4). The external operation input is recognized by the system control circuit 16, and in response, the system control circuit 16 sets the operation mode of the write / read control circuit 13 and the transfer control circuit 15. When the transfer is completed, the state shifts to the normal interpolation reproduction state, the newly captured video data is stored in the memory 11, and the data in the memory 11 is sent to the main video reproduction circuit 14 through the control circuit 13 for still reproduction. (Step A
5). Here, when the repeat section end point B is instructed, the previously stored video data is used (steps A7 and A8).

As a result, a repeat mode is set. Then, the determination of whether there is a repeat reproduction end request is continued (step A9), and if not, it is determined whether the next new still video data is input (step A9).
10), when new video data is input, the video data is fetched into the memory 11, and the video data in the memory 11 is subjected to still reproduction (step A5). Step A
If no new video data has arrived in the judgment of 10, the video data in the memory 12 is repeatedly reproduced. If there is a request to end the repeat reproduction in step A9 or step A6, the repeat mode is canceled and the process returns to step A2.

FIG. 3 shows the movement of the disk reading position of the pickup by the above-described reproducing method. That is, the start point A of the repeat section is between the video data V1 and V2 for the still image, and the end point B of the repeat section.
Indicates that the data exists after the video data V3.
In the repeat operation in such a case, the pickup searches for the start point A of the repeat section and reproduces the audio or sub-picture from this position. Here, since there is no video data in the memory 11 until the video data V2 is obtained, the video data V1 can be used in the section X. This is because the video data V1 is stored in the second memory 12.

Therefore, according to such a reproducing method,
In order to reproduce the audio data from the repeat section start point A, it is not necessary to return to the search to the position of the video data V1.

The present invention is not limited to the above embodiment. FIG. 4 shows another embodiment of the present invention. This embodiment also has a first memory 11 and a second memory 12, but the control method is different.
In the case of this embodiment, the video data from the input terminal 10 is input to the data distribution control circuit 21. The data distribution control circuit 21 includes the system control circuit 1
The memory for writing the video data of the input terminal 10 is switched to the memory 11 or the memory 12 based on the instruction from the memory 6 and used.

The write / read control circuit 13 reads out video data from one of the memories 11 and 12 and supplies the read video data to the main video reproduction circuit 14. FIG. 5 is a flowchart shown to explain the operation of the apparatus of FIG.

During normal continuous reproduction, the main video data is
For example, it is temporarily stored in the memory 11 and supplied to the main video reproduction circuit 14 via the write / read control circuit 13 (steps B1 and B2). Although not shown, the reading position with respect to the optical disk advances sequentially, so that the reproduction of music is continued.

If there is a portion (repeat section start point A) that the user wants to repeat, and the start point is designated by operating the remote controller, the control circuit 21 sends the memory use state to the memory 12 side. Switch (step B4). However, until the video data to be stored in the new memory 12 arrives, the video data in the memory 11 is used.

The external control input is recognized by the system control circuit 16, and in response, the system control circuit 16 sets the operation mode of the write / read control circuit 13 and the data distribution control circuit 21. When new video data arrives, the video data is stored in the memory 12, and the data in the memory 12 is sent to the main video reproduction circuit 14 through the control circuit 13 to be reproduced as a still image.

Here, when there is an operation to designate the end point B of the repeat section, the data distribution control circuit 21 sets the memory 11 in a use state again. For this purpose, the memory 11
Is used as it is (steps B6 and B7).

As a result, a repeat mode is set. Then, it is determined whether or not there is a repeat reproduction end request (step B8), and if not, it is determined whether or not the next new still video data has been input (step B8).
9), when new video data is input, the video data is fetched into the memory 12, and the video data in the memory 12 is set as a new still reproduction target.

If no new video data has arrived in the determination in step B9, the video data in the memory 11 is repeatedly reproduced. If there is a request to end the repeat reproduction in step B5, the repeat mode is released and the use state of the memory 12 is continued, and the video data in the memory 12 is used as it is.

If the end of the repeat reproduction is requested in step B8, the repeat mode is released, and the process goes to step B10. In this case, the memory 12
Move to the use mode of.

Then, it is determined whether or not the repeat section start point A has been designated again (step B11).
Here, if there is a portion where the user wants to perform the repeat reproduction (repeat section start point A) and the start point is specified through the remote control operation, the control circuit 21 switches the memory use state to the memory 11 side (step S1). B
12). However, the video data in the memory 12 is used until video data to be newly stored in the memory 11 arrives. When new video data arrives, the video data is stored in the memory 11, and the data in the memory 11 is sent to the main video reproduction circuit 14 through the control circuit 13 to be reproduced as stills.

Here, when there is an operation to designate the end point B of the repeat section, the data distribution control circuit 21 sets the memory 12 in a use state again. For this purpose, the video data previously stored in the memory 12 (step B10) is used as it is (steps B14, B15).

Thus, a repeat mode is set. Then, the determination of whether there is a repeat reproduction end request is continued (step B16), and if not, it is determined whether the next new still video data has been input (step B17), and the new video data is input. For example, this video data is taken into the memory 11, and the video data in the memory 11 is set as a new still reproduction target. If new video data has not arrived in the determination of step B17, the video data in the memory 12 is repeatedly reproduced.

Step B16 or step B
If there is a request to end the repeat reproduction in step 13, the repeat mode is canceled and the process proceeds to step B2. As described above, in the present invention, when there is no video data when returning to the repeat section start point A, video data stored in advance is used for interpolation. In this case, in the first embodiment, the second memory 12 is used as a dedicated memory for storing interpolation video data. However, in the second embodiment, any one of the interpolation video data is used. The memory 11 and the memory 12 are used alternately each time a repeat section is set without deciding whether to use the memory as a memory.

Further, the present invention is not limited to the above embodiment. In the above-described embodiment, two independent memories are used. However, one memory area is divided into a plurality of areas, and the plurality of areas are divided into a plurality of areas like the first and second memories described above. Of course, it may be handled. That is, when the first command is input, the video data is accumulated in the memory, the address of the storage space is stored, and the address is used in the search operation when the second command is input. It may be.

Next, a DVD reproducing apparatus to which the present invention is applied will be briefly described. FIG. 6 schematically shows the configuration of a DVD reproducing apparatus to which the present invention is applied. A signal read from the optical disk 100 by the pickup 102 is data sliced by the data slice circuit 103 to be binarized, and subjected to error correction processing by the error correction circuit 104. The signal subjected to the error correction processing is guided to a demodulation circuit 105, demodulated into data in units of a predetermined number of bits, and input to a demultiplexer 107 via a track buffer 106. Demultiplexer 107
Then, the main video data packet, the sub video data packet, and the audio data packet are separated and supplied to the video buffer 108, the sub video buffer 109, and the audio buffer 110, respectively. When playing back an audio disc, and when video data of a still picture is recorded on the disc, the packet is input to the still picture buffer 111.

The output of the video buffer 108 is, for example, M
The output of the sub video buffer 109 is input to the PEG decoder 112 and decoded, and the output of the sub video buffer 109 is input to the sub video decoder 113 to demodulate, for example, run-length compressed data. The output of the audio buffer 110 is input to the audio buffer 114, for example, where a linear PCM signal is demodulated. The video signal decoded by the MPEG decoder 112 and, for example, a subtitle video demodulated by the sub-video decoder 113 are synthesized by a synthesizer 115. As a result, the output video becomes a signal in which subtitles are spur imposed.

Reference numeral 121 denotes a servo circuit which detects a synchronization state or picks up by using a clock signal from a PLL (phase lock) circuit created based on a reproduced signal obtained by the data slice circuit 103. A tracking error or the like is detected using the signal obtained from the signal operation. The tracking error signal is fed back to the pickup 102 and used for tracking control, and a signal obtained from the synchronization error information is fed back to the disk drive motor 122, for example.
The rotation phase and the like are also used for control.

The system control circuit 16 is a control unit for managing the whole. Here, the configuration described with reference to FIGS. 1 and 4 is applied to the system of the still image buffer 111 and the MPEG decoder 112.

That is, in the configuration of FIG.
The control circuits 13 and 15 and the memories 11 and 12 are provided in 11. In the configuration of FIG. 4, the correct / incorrect circuits 13 and 21 and the memories 11 and 12 are provided in the still image buffer 111. The present invention is not limited to the above embodiment, and the still image buffer 111 may be used as the first memory 11 and the video buffer 108 may be used as the second memory 12.

[0039]

As described above, according to the present invention, a video output can be obtained immediately regardless of the position of the start point A of the repeat section, and the repeat reproduction can be performed without a sense of incongruity. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the apparatus of FIG. 1;

FIG. 3 is an explanatory diagram showing an example of a relationship between a repeat section and a recording position of a still image in order to operate the apparatus shown in FIG. 1;

FIG. 4 is a diagram showing another embodiment of the present invention.

FIG. 5 is a flowchart illustrating the operation of the apparatus of FIG. 4;

FIG. 6 is a view showing an example of the overall configuration of a DVD reproducing apparatus to which the present invention is applied.

[Explanation of symbols]

11, 12: memory, 13: write / read control circuit, 14: main video reproduction circuit, 15: data transfer control circuit, 16: system control circuit, 21: data distribution control circuit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/92 H04N 5/92 H

Claims (4)

[Claims] 1. A video reproducing method for reproducing video data intermittently arriving and data reproduced together with the video data by a video decoder, wherein a first command input for designating a search point of the data is received. When the video data currently being supplied to the video decoder is temporarily saved in a storage unit for saving, and when a second command input for searching for the first search point is received, the data of the search point is read. And outputting the video data to the decoder by providing the video data in the storage unit for evacuation to the decoder. 2. The video reproducing method according to claim 1, further comprising a memory used as a storage unit during normal reproduction in addition to the storage unit for saving. 3. The storage unit for interpolation and the storage unit for retraction,
It switches alternately each time the first command is input,
3. The video reproducing method according to claim 2, wherein the interpolation and the evacuating are shared. 4. When the first command is input, the video data is stored in a memory, an address of a storage space thereof is stored, and is used in a search operation when a second command is input. The video reproducing method according to claim 1, wherein