JP3804411B2 - Optical disk playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disk reproducing apparatus such as a DVD reproducing apparatus having a DVD (digital versatile disc) audio function.
[0002]
[Prior art]
As one of the functions of DVD audio, there is a function called audio still video (hereinafter referred to as “ASV”) for displaying a still image on a display screen of a monitor device during reproduction of a music piece. In this ASV, for example, an artist's jacket picture, lyrics, liner notes, etc. can be displayed on the display screen of the monitor device. In this ASV, the designated ASV group is read in advance and stored in the memory of the optical disk playback device before the music is played, so that the still video can be played along with the music. Here, the ASV group is a set of image data for projecting a plurality of still images.
[0003]
[Problems to be solved by the invention]
However, if the music is played back sequentially, a new ASV group must be loaded when the track being played changes to the next track, so the music data is not read during that period. Therefore, there was a problem that smooth music reproduction was not performed.
[0004]
In the DVD audio standard, there are a type that projects a still image on a display screen of a monitor device and a type that does not project, and a type that does not project a still image naturally has no room for the above problems and is smooth. Although natural playback is performed, naturally still images cannot be enjoyed.
[0005]
The present invention has been conceived under such circumstances, and when reproducing an optical disc capable of projecting a still image on the display screen of a monitor device, the music reproduction is interrupted when the track changes. It is an object of the present invention to provide an optical disk reproducing apparatus that can be satisfactorily reduced.
[0006]
DISCLOSURE OF THE INVENTION
In order to solve the above problems, the present invention takes the following technical means.
[0007]
According to the onset bright, when reproducing from the optical disk associated with the plurality of still image data is a plurality of music data are recorded by reading the music data, a plurality of still associated with the music data An optical disk playback device that reads image data and plays back the music data during playback of the music data, and reads the music data by rotating the optical disk at a rotational speed higher than the rotational speed necessary for playing the music data. A music data storage means for temporarily storing the music data read by the music data reading means; and a music to be read and reproduced when a predetermined amount of music data is stored in the music data storage means. reproducing means, and the still image data reading means for reading the still image data from the optical disk, in the still image data reading means And still image data storage means for temporarily storing the still image data Desa seen, a predetermined amount of still image data is stored in the still image data storage means, the still images to be sequentially reading and reproducing the respective still image data When reproducing a plurality of pieces of music data, and reproducing each piece of music data, the first piece of still image data among the plurality of pieces of still image data corresponding to each piece of music data is read out by means of a still image data reading unit. The image data is read by the still image data storage means, and then the reading operation of the song data to the song data storage means by the song data reading means and the reading operation of the still image data to the still image data storage means by the still image data reading means are alternately performed. There is provided an optical disk reproducing apparatus characterized by comprising data read control means to be executed by the apparatus.
[0008]
According to a preferred embodiment, when the music data to be reproduced is switched , the data read control means reproduces the music data before switching the reading operation of the first still image data corresponding to the next music data. Let it be done during the period .
[0012]
According to the present invention, when a plurality of pieces of music data are continuously reproduced, when each piece of music data is reproduced, the first piece of still image data among the plurality of pieces of still image data corresponding to each piece of music data is converted into the still image data. The reading means causes the still image data storage means to read, and then the music data reading means reads the music data to the music data storage means, and the still image data reading means reads the still image to the still image data storage means. the so causes alternately, when reproducing the Utsude optical disc a still image on the display screen of the monitor device, the interruption of the music playback during transition of the music data can satisfactorily reduced.
[0014]
Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a circuit block diagram of a DVD audio player as an example of an optical disk reproducing apparatus according to the present invention. The DVD audio player includes a CPU 1, a memory 2, an operation unit 3, a drive unit 4, a signal processing unit 5, A video / audio decoding processing unit 6, a video encoding unit 7, and a D / A conversion processing unit 8 are provided. The video / audio decoding processing unit 6 includes a video buffer memory 11 and an audio buffer memory 12.
[0017]
The CPU 1 functions as a host CPU and controls the entire DVD audio player.
[0018]
The memory 2 provides a work area to the CPU 1 and stores various data.
[0019]
The operation unit 3 includes a group of key switches operated by a user and supplies an operation signal corresponding to an operation by the user to the CPU 1.
[0020]
The drive unit 4 includes a pickup that accesses a DVD audio disk (not shown) as an audio optical disk, a servo processing circuit that controls the pickup, a motor that rotates the DVD audio disk, and the like, and is recorded on the DVD audio disk. Read the signal.
[0021]
The signal processing unit 5 processes the signal from the drive unit 4 by a predetermined method.
[0022]
The video / audio decoding processing unit 6 generates music data and image data by decoding the data from the signal processing unit 5. The generated image data is temporarily stored in the video buffer memory 11 as image data storage means, and the music data is temporarily stored in the audio buffer memory 12 as music data storage means. Further, the video / audio decoding processing unit 6 outputs the music data as a digital audio signal to a digital audio signal output terminal (not shown).
[0023]
The video encoding unit 7 encodes the image data from the video / audio decoding processing unit 6 and outputs it as a video signal to a video signal output terminal (not shown). This video signal is supplied to a monitor device (not shown).
[0024]
The D / A conversion processing unit 8 converts the music data from the video / audio decoding processing unit 6 into an analog audio signal and outputs it to an analog audio signal output terminal (not shown). This analog audio signal is supplied to an audio device (not shown).
[0025]
FIG. 2 is an explanatory diagram of the presentation hierarchy of the DVD audio disk. The smallest unit that can be accessed by the user is an index 51, and one or more indexes 51 are collected to form a track 52. Access to the track 52 by the user is an essential function of the DVD audio player, but access to the index 51 is not an essential function. One or more tracks 52 are gathered to form a group 53, and the group 53 is an album 54. The album 54 is a hierarchy that can be defined on one side of a DVD audio disc, and is the largest unit.
[0026]
FIG. 3 is an explanatory diagram of the logical configuration of the DVD audio disk. In general, DVD audio discs are roughly classified into two types: AVTT (audio with video title) and AOTT (audio only title). AVTT is a title that plays back video, music, and sub-pictures that are in the format of the DVD video standard, and AOTT is a title that plays back only music, or music, still video, and highlights as needed. . In the case of AVTT, it has a DVD audio zone 61 and a DVD video zone 62, and in the case of AOTT, it has only the DVD audio zone 61. The DVD audio zone 61 includes a simple audio management area 63, an audio management area 64, a still video area 65, and an audio title area 66. The DVD video zone 62 includes a video management area 67 and a video title area 68.
[0027]
The simple voice management area 63 stores information that enables access to the track 52 without complicated navigation, and is usually used for 2-channel playback. By using the simple voice management area 63, some functions are limited, but simple reproduction is possible.
[0028]
The audio management area 64 stores overall information related to the disc including a menu-format video called a visual menu.
[0029]
In the still image area 65, a set of still images and address information thereof are stored. The still video area 65 is optional in the DVD audio standard and is not necessarily required.
[0030]
The audio title area 66 stores music information and the like. A maximum of 99 audio title areas 66 exist in the DVD audio zone 61.
[0031]
The video management area 67 stores overall information related to the moving image included in the disc. However, this information is not referred to by the DVD audio player.
[0032]
The video title area 68 stores moving image information and the like. There are a maximum of 99 video title areas 68 in the DVD video zone 62.
[0033]
FIG. 4 is an explanatory diagram of the voice management area 64, and the voice management area 64 includes a management information area 71, a visual menu area 72, and a management information backup area 73. The management information area 71 includes a management table area 75, a first survey table area 76, a second survey table area 77, a visual menu table area 78, and a text information management area 79.
[0034]
In the management information area 71, information on the entire album 54 is stored.
[0035]
The visual menu area 72 stores information called a visual menu for easily accessing each title.
[0036]
In the management information backup area 73, backup information of the management information area 71 is stored.
[0037]
The management table area 75 stores a table for managing information on the entire album 54.
[0038]
The first survey table area 76 stores a table for searching for titles.
[0039]
The second survey table area 77 stores a table for searching for titles.
[0040]
The visual menu table area 78 stores a table for reproducing the visual menu.
[0041]
In the text information management area 79, text information of the album 54 is stored.
[0042]
Incidentally, the DVD audio standard defines two types of DVD audio players. One is a player that plays purely music, and in this case, no visual menu or still video is displayed. The other is a player that can play video. The first survey table area 76 is provided for a player capable of reproducing video, and the second survey table area 77 is provided for a player who reproduces only music.
[0043]
FIG. 5 is an explanatory diagram of the still video area 65, and the still video area 65 includes a still video information area 81, a still video data area 82, and a still video information backup area 83. The still video information area 81 includes a still video group information area 85, a still video search table area 86, and a spare area 87.
[0044]
The still video information area 81 stores still video address information and the like.
[0045]
The still video data area 82 stores a large number of still video data.
[0046]
The still video information backup area 83 stores backup information of the still video information area 81.
[0047]
The still video group information area 85 stores information such as the number of still video groups composed of a plurality of still videos, video attributes, and to which still video group each still video belongs. The video attributes are, for example, an encoding method and an aspect ratio.
[0048]
The still image search table area 86 stores a table representing address information of each still image.
[0049]
FIG. 6 is an explanatory diagram of the audio title area 66, and the audio title area 66 includes an audio title information area 91, an audio data area 92, and an audio title information backup area 93. The audio title information area 91 includes an audio title information management table area 95 and a program related information table area 96. The program related information table area 96 includes a general information area 101, a program information table area 102, a cell playback information area 103, and a still video playback information table area 104.
[0050]
The audio title information area 91 stores various types of information related to audio titles.
[0051]
The audio data area 92 stores music data of each title of audio. The music data stored in the audio data area 92 is addressed using the table stored in the program related information table area 96, and the music is reproduced.
[0052]
The audio title information backup area 93 stores backup information of the audio title information area 91.
[0053]
The audio title information management table area 95 stores information on titles included in the audio title area 66, such as music data attributes. The attributes of music data include, for example, a coding mode, the number of quantization bits, a sampling frequency, and the like.
[0054]
The program related information table area 96 stores a table representing reproduction information for giving a presentation.
[0055]
The general information area 101 stores general information for giving a presentation.
[0056]
The program information table area 102 stores a table representing information related to individual programs. A program is synonymous with a track and is an individual song.
[0057]
The cell reproduction information area 103 stores information related to individual cells.
[0058]
In the still video reproduction information table area 104, a table indicating the display order of the still video displayed on each track, the display timing, and the like is stored.
[0059]
Next, the operation will be described. In the normal reproduction mode, before reproducing the music of the track selected by the user, the pickup of the drive unit 4 is controlled by the CPU 1 to read out and reproduce the still image reproduction information table area 104 of the DVD audio disk. The number of the still video group corresponding to the track is searched, then the still video search table area 86 is read, and the address of each still video of the still video group corresponding to the searched number is searched. Then, the data of each still image is read from the still image data area 82 based on the searched address.
[0060]
The read still video data is stored in the video buffer memory 11 of the video / audio decoding processing unit 6.
[0061]
Thereafter, the pickup of the drive unit 4 is controlled by the CPU 1 to access the audio title area 66 corresponding to the track selected by the user, and sequentially read out the audio data from the audio data area 92.
[0062]
The read audio data is subjected to predetermined signal processing by the signal processing unit 5, decoded by the video / audio decoding processing unit 6, and supplied to the D / A conversion processing unit 8 via the audio buffer memory 12. The The D / A conversion processing unit 8 converts the audio data into an analog audio signal and supplies the analog audio signal to a television receiver or the like via an analog audio signal output terminal. Thereby, the music is reproduced.
[0063]
On the other hand, the data of the still video group accumulated in the video buffer memory 11 before the reproduction of the music is sequentially supplied to the video encoding unit 7 as the music reproduction progresses, converted into a video signal, and connected to the video signal output terminal. For example, it is supplied to a television receiver or the like. As a result, a still image is displayed on the display screen of the television receiver.
[0064]
As a result, the user can view several still images while listening to the desired music.
[0065]
Thus, in the normal playback mode, for each track 52, the still video data of the still video group is read and stored in the video buffer memory 11 before the music is played back, so that playback of one track 52 is completed. Then, when proceeding to the next track 52, or when jumping from one track 52 to another track 52, the pickup of the drive unit 4 reads the still image data of the still image group to read the still image area. Move to 65. Therefore, the sound reproduction is interrupted for a relatively long time, and the user may feel stress.
[0066]
When the user operates the operation unit 3 to select the first special reproduction mode, when the music is reproduced, first, the pickup of the drive unit 4 is controlled by the CPU 1 to access the audio data area 92 to obtain the audio data. read out. When reading the audio data for reproducing the music, the CPU 1 controls the motor of the drive unit 4 to rotate the DVD audio disk faster than the 1 × speed. As a result, the amount of data stored in the audio buffer memory 12 gradually increases. When a predetermined amount of audio data is accumulated in the audio buffer memory 12, the CPU 1 stores in the memory 2 the address of the audio data area 92 currently accessed by the pickup of the drive unit 4. Then, the CPU 1 controls the pickup of the drive unit 4 to move to the address of the still video data area 82 where the next still video data is recorded, and to read the still video data. This data is stored in the video buffer memory 11. Thereafter, the CPU 1 controls the pickup of the drive unit 4 to resume reading of audio data. At this time, based on the address stored in the memory 2, reading of the audio data is started from the position where the reading of the audio data is interrupted in order to read the data of the still video. Even during the readout period of such still video data, the reproduction of music is continued based on the audio data stored in the audio buffer memory 12.
[0067]
By repeating the above operation, the music of the arbitrary number of tracks 52 is reproduced, and the data of the still video is read and displayed for all the still videos without interrupting the reproduction of the music. Still video switches. That is, the music of each track is continuously reproduced without being interrupted, and the displayed still video is sequentially switched during that time.
[0068]
When the user operates the operation unit 3 to select the second special playback mode, before the music playback of each track 52, as in the normal playback mode, all of the still video group corresponding to the track 52 is displayed. Rather than reading still video data, only one still video data is read before playing the music, and the remaining still video data is read as appropriate while playing the music and stored in the video buffer memory 11. .
[0069]
For example, as shown in FIG. 7, when a plurality of tracks 52 are jumped and music is sequentially played and a plurality of still images are displayed for each track 52, the first one is read before the audio data is read. The still video data is read out and stored in the video buffer memory 11. The still video is displayed simultaneously with the reproduction of the music. When reading the audio data for reproducing the music, the CPU 1 controls the motor of the drive unit 4 to rotate the DVD audio disk faster than the 1 × speed. As a result, the amount of data stored in the audio buffer memory 12 gradually increases. When a predetermined amount of audio data is accumulated in the audio buffer memory 12, the CPU 1 stores in the memory 2 the address of the audio data area 92 currently accessed by the pickup of the drive unit 4. Then, the CPU 1 controls the pickup of the drive unit 4 to move to the address of the still video data area 82 where the next still video data is recorded, and to read the still video data. This data is stored in the video buffer memory 11. Thereafter, the CPU 1 controls the pickup of the drive unit 4 to resume reading of audio data. At this time, based on the address stored in the memory 2, reading of the audio data is started from the position where the reading of the audio data is interrupted in order to read the data of the still video. Even during the readout period of such still video data, the reproduction of music is continued based on the audio data stored in the audio buffer memory 12.
[0070]
The operation of reading still video data while continuing to reproduce the music as described above is repeated according to the number of still videos included in the still video group corresponding to one track 52.
[0071]
Also, when jumping from one track 52 to another track 52, as with the previous track 52, one still video data is read out and stored in the video buffer memory 11 before the music is played. Reading the data of the second and subsequent still images is performed while the music is being played.
[0072]
By repeating the operation as described above, the music of the plurality of tracks 52 is reproduced, and the still video data of the second and subsequent still images of each track 52 is read without interrupting the reproduction of the music. The still video displayed is switched. That is, the music of each track is played continuously without interruption in the middle, and the displayed still video is sequentially switched during that time.
[0073]
Also, as shown in FIG. 8, when the music of a plurality of continuous tracks 52 is sequentially reproduced and a plurality of still images are displayed for each track 52, the first track 52 of the plurality of continuous tracks 52 is displayed. The data of the first still video of the still video group corresponding to is read before the music is played back, and all the still video data after that is appropriately reproduced during the music playback without interrupting the music playback. read out.
[0074]
In this way, by selecting the first special playback mode, all still video data can be read out and displayed as appropriate without interrupting the playback of the music, so that the music can be played back when the track changes. Can be satisfactorily reduced and the user is not stressed. In addition, although the display of the first still video is slightly delayed from the start of music reproduction, the music can be reproduced almost simultaneously with the play instruction operation by the user, and the user is not stressed from this point. Furthermore, the capacity of the video buffer memory 11 can be reduced.
[0075]
Further, by selecting the second special playback mode, all the data other than the first still video of the first track 52 of the plurality of continuous tracks 52 or the data of the second and subsequent still videos of each track 52 are selected. Still image data can be read and displayed as appropriate without interrupting the playback of the music, so that the music playback can be satisfactorily reduced when the track changes, and the user is not stressed. . In addition, since only one piece of still video data is read before the music playback starts, the time from the play instruction operation by the user to the music playback start can be shortened, and this also makes the user feel stressed. There is nothing. Furthermore, the capacity of the video buffer memory 11 can be reduced.
[0076]
In the above-described embodiment, two types of special reproduction modes, the first special reproduction mode and the second special reproduction mode, are employed as the special reproduction mode, but only one of them may be employed.
[0077]
Further, in the above-described embodiment, the still video data is appropriately read one by one during the reproduction of the music. However, two or more still video data may be read at a time.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram of a DVD audio player as an example of an optical disk reproducing apparatus according to the present invention.
FIG. 2 is an explanatory diagram of a presentation hierarchy of a DVD audio disc.
FIG. 3 is an explanatory diagram of a logical configuration of a DVD audio disk.
4 is an explanatory diagram of a voice management area shown in FIG. 3. FIG.
FIG. 5 is an explanatory diagram of a still video area shown in FIG. 3;
6 is an explanatory diagram of an audio title area shown in FIG. 3. FIG.
FIG. 7 is an explanatory diagram of a playback situation when a plurality of tracks are played while jumping in the second special playback mode.
FIG. 8 is an explanatory diagram of a playback situation when a plurality of continuous tracks are played back in the second special playback mode.
[Explanation of symbols]
1 CPU
2 Memory 3 Operation unit 4 Drive unit 5 Signal processing unit 6 Video / audio decoding processing unit 7 Video encoding unit 8 D / A conversion processing unit 11 Video buffer memory 12 Audio buffer memory

Claims (2)

When the music data is read out from an optical disc on which a plurality of pieces of still image data are associated and a plurality of pieces of music data are recorded and reproduced, the plurality of pieces of still image data associated with the music data are read out. An optical disc playback device for playback during playback of the music data ,
Music data reading means for reading the music data by rotating the optical disc at a rotational speed higher than the rotational speed necessary for reproducing the music data;
Music data storage means for temporarily storing the music data read by the music data reading means ;
When a predetermined amount of music data is stored in the music data storage means, music playback means for reading out and playing back the music data;
Still image data reading means for reading the still image data from the optical disc;
Still image data storage means for temporarily storing each still image data read by the still image data reading means ;
When a predetermined amount of still image data is stored in the still image data storage means, still image reproduction means for reading out each still image data and sequentially reproducing it,
In the case where a plurality of pieces of music data are continuously played back, when each piece of music data is played back, the still image data reading means reads the first still image data out of the plurality of pieces of still image data corresponding to each piece of music data. The image data storage means reads the data, and then the music data reading means reads the music data to the music data storage means and the still image data reading means reads the still image to the still image data storage means. Data reading control means for alternately performing,
An optical disc playback apparatus comprising: When the music data to be reproduced is switched, the data read control means performs the reading of the first still image data corresponding to the next music data during a period in which the music data before the switching is being reproduced. characterized in that, the optical disk reproducing apparatus according to claim 1.

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