JP2007122760A - Disk reproducing device and reproducing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control so that an audio under reproduction is not interrupted at the time of track transition of audio data under reproduction, of the audio data and still picture data recorded on an optical disk of DVD audio. <P>SOLUTION: During reproduction of the audio data, an ASVU number of next track of the audio data under reproduction is acquired, and when a remained reproduction time of the audio data of the track under reproduction becomes the predetermined time or shorter, the ASVU of next track of the audio data under reproduction is read to accumulate the ASVU of next track in a buffer memory, and when the reproduction of audio data is transited to the next track, the audio data of next track are reproduced so that the ASVU of next track being accumulated in the buffer memory is reproduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a disk playback apparatus and a playback method for playing back audio / video data recorded on an optical disk, and more particularly to a disk playback apparatus capable of preventing the sound being played back from being interrupted during a track transition of the audio data. It relates to the reproduction method.

In general, audio data that can be reproduced with high quality is divided into a plurality of tracks and recorded on an optical disc of DVD audio (DVD-Audio), which is one standard of DVD (Digital Versatile Disc). In addition to audio data, video data such as still image data is recorded on the DVD audio optical disc. When reproducing the audio data recorded on the DVD audio optical disc, the still image specified by the provider is used. Data can be read into a memory and still image data can be displayed as a background image on the screen of the monitor device. However, the maximum amount of still image data recorded on the DVD audio optical disk is 2 MB, and the recording position of the still image data recorded on the DVD audio optical disk is far away from the recording position of the audio data. There is a problem in that it takes time to transition between tracks, and it takes time to read still image data of background image data during playback of audio data, and the sound being played is interrupted while reading still image data. It was.
As background technology, when playing back audio data and moving image data, the frames necessary for the reproduction processing are pre-read, the audio data and moving image data are synchronized, and the moving image data is reproduced in real time. In some cases, audio data is reproduced in synchronization with real time (see, for example, Patent Document 1).
When playing back data recorded on a DVD-Audio optical disc, when playing back only audio data in the audio zone, it is checked whether the track to be played is an audio zone or a video zone, and the track is a video zone. In some cases, the reproduction of the track is skipped and the audio data of the track in the audio zone is reproduced (for example, see Patent Document 2).
Also, any text data included in the audio data is pre-read, and the pre-read arbitrary text data is synthesized with the image data being played back without considering the correspondence with the image data being played back. In other cases, information of other songs that are not related to the song being played back is displayed on the screen (for example, see Patent Document 3).
JP-A-7-64761 JP 2005-71415 A JP 2003-150177 A

However, in the first one described in the background art, at the time of reproduction of audio data and moving image data, a frame necessary for reproduction processing is pre-read and the audio data and moving image data are synchronized, Data was played back in synchronization with real time, and audio data was played back in synchronization with real time. However, both audio data and video data were synchronized with each other in real time for each frame. The audio data and the moving image data encoded by the prediction / interpolation are reproduced, and the above-mentioned problems are not solved.
In the following, when reproducing data recorded on a DVD audio optical disc, when reproducing only audio data in the audio zone, it is checked whether the track to be reproduced is an audio zone or a video zone, Was in the video zone, the playback of that track was skipped and the audio data of the track in the audio zone could be played back, but the video / still image data recorded in the video zone of the DVD audio optical disc could be played back. This method skips and reproduces only the audio data recorded in the audio zone, and does not solve the above problem.
Further, in the next one, any text data included in the audio data is pre-read, and the pre-read arbitrary text data is reproduced without considering the correspondence with the image data being reproduced. It was combined with the data and displayed on the same screen as the image data being played back, and information on other songs unrelated to the song being played could be displayed on the screen. The user can search for detailed information of other songs that are not related to the above, and is not intended to solve the above problems.
The present invention has been made in view of such problems of the background art, and an object of the present invention is to reproduce audio data recorded on a DVD audio optical disc and still image data. It is an object of the present invention to provide a disk reproducing apparatus and a reproducing method thereof that can prevent the sound being reproduced from being interrupted at the time of track transition.

In order to achieve the above object, according to the present invention, there is provided a disc playback apparatus for playing back audio-video data recorded on a DVD audio optical disc, wherein the ASVU number of the next track of the audio data being played back during playback of the audio data And when the remaining reproduction time of the audio data of the track being reproduced is equal to or less than a predetermined time, the ASVU of the next track of the audio data being reproduced is read and the ASVU of the next track is stored in the buffer memory Storage means, and playback means for playing back the audio data of the next track and playing back the ASVU of the next track stored in the storage means when the playback of the audio data transits to the next track.
When the remaining reproduction time of the audio data of the track being reproduced is equal to or less than the sum of the predicted value of the full stroke time and the estimated reading time of ASVU plus a predetermined margin, the storage means It is preferable to read the ASVU of the next track of data and store the ASVU of the next track in the buffer memory.
By these means, it is possible to prevent the sound being reproduced from being interrupted at the time of track transition of the sound data being reproduced between the audio data recorded on the DVD audio optical disk and the still image data.

According to the disc playback apparatus of the first aspect, during playback of audio data, the ASVU number of the next track of the audio data being played back is acquired, and the remaining playback time of the audio data of the track being played back is full. When the total time of the predicted stroke time and the estimated reading time of ASVU is less than the time obtained by adding a predetermined margin, the ASVU of the next track of the audio data being reproduced is read and the ASVU of the next track is stored in the buffer memory When the playback of the audio data transits to the next track, the audio data of the next track is reproduced and the ASVU of the next track stored in the buffer memory is reproduced. During playback of audio data and still image data, the audio being played is not interrupted during the track transition. It can be.
According to the disc reproducing apparatus of the second aspect, during the reproduction of the audio data, the ASVU number of the next track of the audio data being reproduced is acquired, and the remaining reproduction time of the audio data of the track being reproduced is predetermined. When the time is less than the time, the ASVU of the next track of the audio data being played is read, the ASVU of the next track is stored in the buffer memory, and the audio data of the next track is played when the audio data playback transitions to the next track In addition, since the ASVU of the next track stored in the buffer memory is reproduced, the audio data recorded on the DVD audio optical disc and the still image data are being reproduced at the time of the track transition of the audio data being reproduced. Can be kept from being interrupted.
According to the disc playback apparatus of the present invention, the remaining playback time of the audio data of the track being played is a time obtained by adding a predetermined margin to the total time of the predicted value of the full stroke time and the predicted reading time of the ASVU When the following condition is reached, the ASVU of the next track of the audio data being reproduced is read and the ASVU of the next track is stored in the buffer memory, so the audio data and still image data recorded on the DVD audio optical disk It is possible to prevent the sound being reproduced from being interrupted during the track transition of the sound data being reproduced.
According to the playback method of the disc playback apparatus according to the fourth aspect of the invention, the audio data and the ASVU are played back, the ASVU number of the next track of the audio data being played back is obtained, and the audio data of the track being played back is obtained. When the remaining playback time is equal to or shorter than the sum of the predicted value of full stroke time and the predicted reading time of ASVU plus a predetermined margin, the ASVU of the next track of the audio data being played is read and the ASVU of the next track is read. Is reproduced in the buffer memory, and when the reproduction of the audio data transits to the next track, the audio data of the next track is reproduced and the next track's ASVU accumulated in the buffer memory is reproduced. Playback at the time of audio data track transition during playback of audio data recorded on an audio optical disc and still image data It is possible to ensure that the sound is not interrupted.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a block diagram showing the configuration of a disk reproducing apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the operation of the disk reproducing apparatus according to an embodiment of the present invention, and FIG. It is a flowchart which shows operation | movement of the disc reproducing | regenerating apparatus of one Example.
First, a description will be given based on a block diagram showing a configuration of a disk reproducing apparatus according to an embodiment of the present invention shown in FIG.
The disc reproducing apparatus 1 irradiates an optical disc 2 with laser light, detects the reflected light, reads an audio / video data recorded on the optical disc 2, a spindle motor 4 that rotates the optical disc 2, and an optical pickup. 3 is controlled by servo-controlling the rotational speed of the spindle motor 4 and the rotational direction and rotational speed of the spindle motor 4, and the tracking error signal detected by the optical pickup 3 and the focus. A servo circuit 6 that servo-controls tracking and focus of the optical pickup 3 based on the error signal, an RF amplification circuit 7 that amplifies an RF (Radio Frequency) signal of audio-video data read by the optical pickup 3, and an RF amplification Audio / video data amplified by the circuit 7 The RF signal of the data is synchronously detected and demodulated based on the reference clock, the error of the demodulated audio / video data is corrected, and the audio / video data compressed based on a predetermined compression method is expanded and expanded. A signal processing circuit 8 that decodes the reproduced audio / video data to reproduce a video signal and an audio signal, and an audio signal output that amplifies the audio signal reproduced by the signal processing circuit 8 and outputs the audio signal to the speaker system 30 The video signal reproduced by the circuit 9 and the signal processing circuit 8 is amplified and the video signal output circuit 10 for outputting the video signal to the monitor device 40, and the audio / video data read from the optical disc 2 are temporarily stored. Receiving the remote control signal of the infrared signal transmitted from the buffer memory 11, the microcomputer 12 that controls the entire system of the disk playback device 1, and the remote control device 20, It is composed of a remote control receiver 13 for converting a constant electrical signal.
The operation of the disk reproducing apparatus configured as described above will be described below.
When the reproduction of the audio / video data recorded on the DVD audio optical disk 2 is instructed by the key operation of the remote control device 20, the microcomputer 12 calculates the still image data from the predicted value of the full stroke time of the optical pickup 3 measured in advance. The reading time of ASVU (Audio Still Video Unit) is predicted. Then, the microcomputer 12 sends a control signal to the servo circuit 6 to drive the spindle motor 4 to rotate the optical disc 2 and to drive the sled motor 5 to move the optical pickup 3 in the radial direction of the optical disc 2. Then, the tracking and focus of the optical pickup 3 are servo controlled, the audio data recorded on the DVD audio optical disk 2 and the ASVU of the still image data are read by the optical pickup 3, and the audio data and the still image are read by the signal processing circuit 8. The audio signal of the audio data is output from the audio signal output circuit 9 to the speaker system 30, and the video signal of the still image data is output from the video signal output circuit 10 to the monitor device 40.
During the reproduction of audio data and still image data, the microcomputer 12 obtains the ASVU number of the still image data of the next track of the audio data being reproduced from the ATS_PG_ASV_PBI_SRP of the track information recorded on the optical disc 2 of the DVD audio. It is determined whether the ASVU number of the still image data acquired from the ATS_PG_ASV_PBI_SRP of the information is the same ASVU number as the ASVU number of the still image data being reproduced, and the ASVU number of the still image data acquired from the ATS_PG_ASV_PBI_SRP of the track information Is the same ASVU number as the ASVU number of the still image data being reproduced, the ASVU of the still image data being reproduced is continuously reproduced.
If the ASVU number of the still image data acquired from the ATS_PG_ASV_PBI_SRP of the track information is not the same ASVU number as the still image data being reproduced, the microcomputer 12 determines that the remaining reproduction time of the audio data of the track being reproduced is predetermined. The audio data of the track being reproduced is determined by determining whether or not the time is less than the time, that is, the time obtained by adding the predetermined margin to the total time of the predicted value of the full stroke time and the estimated ASVU reading time of the still image data. When the remaining playback time of the track becomes less than a predetermined time, the ASVU of the still image data of the next track of the audio data being played back, for example, the ASVU2 of the still image data of the next track 2 is played back during the playback of the audio data of the track 1 It is read from the DVD audio optical disk 2 and stored in the buffer memory 11 (see FIG. 2). ).
When the reproduction of the audio data of the track being reproduced is finished, the microcomputer 12 changes the optical pickup 3 to the next track, reads the audio data of the next track to the optical pickup 3, and reproduces the audio data by the signal processing circuit 8. 2 (see FIG. 2), the audio signal of the reproduced audio data is output from the audio signal output circuit 9 to the speaker system 30 and is read from the DVD audio optical disk 2 and stored in the buffer memory 11. The ASVU is decoded by the signal processing circuit 8 to reproduce the still image data (see FIG. 2), and the video signal of the reproduced still image data is output from the video signal output circuit 10 to the monitor device 40. As a result, during playback of the audio / video data recorded on the DVD audio optical disc 2, the ASVU of the still image data of the next track of the audio data being reproduced is read and stored in the buffer memory 11. It is possible to prevent the sound from being interrupted during the track transition of the sound data.
The operation will be described with reference to the flowchart of FIG. 3 showing the operation of the disk reproducing apparatus according to the embodiment of the present invention.
When the reproduction of the audio / video data recorded on the DVD audio optical disk is instructed by the key operation of the remote control device, the process proceeds from step S1 to step S2, and in step S2, the predicted value of the full stroke time of the optical pickup measured in advance. From this, the ASVU reading time of still image data is predicted, and the process proceeds to step S3.
In step S3, the ASVU of audio data and still image data is reproduced, and the ASVU number of the still image data of the next track of the audio data being reproduced is acquired from the ATS_PG_ASV_PBI_SRP of the track information, and the process proceeds to step S4.
In step S4, it is determined whether the ASVU number of the still image data acquired from the ATS_PG_ASV_PBI_SRP of the track information is the same ASVU number as the ASVU number of the still image data being reproduced, and the ASVU number of the acquired still image data If the ASVU number is the same as the ASVU number of the still image data being reproduced, the process proceeds to step S5, and if the ASVU number of the acquired still image data is not the same ASVU number as the still image data being reproduced, the step Proceed to S9.
In step S5, it is determined whether or not the remaining reproduction time of the audio data of the track being reproduced has become a predetermined time or less. If the remaining reproduction time of the audio data of the track being reproduced has become a predetermined time or less, step S6 is performed. If the remaining reproduction time of the audio data of the track being reproduced is not less than the predetermined time, the process proceeds to step S7.
In step S6, the ASVU of the still image data of the next track of the audio data being reproduced is read, the ASVU of the read still image data of the next track is stored in the buffer memory, and the process proceeds to step S7.
In step S7, it is determined whether or not the transition of the audio data to the next track is made. If the transition of the audio data to the next track is reached, the process proceeds to step S8, where the transition of the audio data to the next track is made. If not, the process proceeds to step S10.
In step S8, the audio data is changed to the next track, the audio data of the next track is reproduced, the ASVU of the still image data of the next track read and stored in the buffer memory is reproduced, and the process proceeds to step S10.
In step S9, the ASVU of the still image data being reproduced is continuously reproduced, and the process proceeds to step S10.
In step S10, it is determined whether or not the reproduction of the audio / video data is finished. If the reproduction of the audio / video data is finished, the process proceeds to step S11 to finish the process, and the reproduction of the audio / video data is not finished. Returning to step S3, the steps from step S3 are repeated.
Although the best mode for carrying out the present invention has been described in detail above, the present invention is not limited to this, and modifications and improvements can be made within the ordinary knowledge of those skilled in the art. Needless to say.

It is a block diagram which shows the structure of the disc reproducing | regenerating apparatus of one Example of this invention. It is explanatory drawing which shows operation | movement of the disc reproducing | regenerating apparatus of one Example of this invention. It is a flowchart which shows operation | movement of the disc reproducing | regenerating apparatus of one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc player 2 Optical disc 3 Optical pick-up 4 Spindle motor 5 Thread motor 6 Servo circuit 7 RF amplifier circuit 8 Signal processing circuit 9 Audio signal output circuit 10 Video signal output circuit 11 Buffer memory 12 Microcomputer 13 Remote control receiver 20 Remote control device 30 Speaker System 40 Monitor device

Claims (4)

A disc playback apparatus for playing back audio-video data recorded on a DVD audio optical disc,
An acquisition means for acquiring the ASVU number of the next track of the audio data being reproduced during reproduction of the audio data, a predicted value of the full reproduction time of the audio data of the audio data of the track being reproduced, an estimated reading time of the ASVU, Storage means for reading the ASVU of the next track of the audio data being reproduced and accumulating the ASVU of the next track in the buffer memory when the predetermined time is added to the total time of And a playback means for playing back the audio data of the next track and playing back the ASVU of the next track stored in the buffer memory by the storage means. A disc playback apparatus for playing back audio-video data recorded on a DVD audio optical disc,
During the reproduction of the audio data, the acquisition means for acquiring the ASVU number of the next track of the audio data being reproduced, and the audio data being reproduced when the remaining reproduction time of the audio data of the track being reproduced becomes a predetermined time or less Storage means for reading the next track's ASVU and storing the next track's ASVU in the buffer memory, and when the playback of the audio data transitions to the next track, the audio data of the next track is played back and stored in the buffer memory by the storage means A disc playback apparatus comprising playback means for playing back the stored ASVU of the next track. When the remaining reproduction time of the audio data of the track being reproduced is equal to or less than the sum of the predicted value of the full stroke time and the estimated reading time of ASVU plus a predetermined margin, the storage means 3. The disk reproducing apparatus according to claim 2, wherein the disk reproducing apparatus is an accumulating unit that reads the ASVU of the next track of data and accumulates the ASVU of the next track in a buffer memory. A playback method of a disk playback device for playing back audio-video data recorded on a DVD audio optical disk,
The step of reproducing the audio data and ASVU, obtaining the ASVU number of the next track of the audio data being reproduced, the remaining reproduction time of the audio data of the track being reproduced, the predicted value of the full stroke time, the estimated reading time of the ASVU, When the ASVU of the next track of the audio data being reproduced is read and the ASVU of the next track is stored in the buffer memory, and the audio data is reproduced to the next track. And a step of reproducing the audio data of the next track and reproducing the ASVU of the next track stored in the buffer memory when the transition is made.

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