JP3412631B1 - Playback method - Google Patents

Abstract

A method for reproducing a recording medium of audio data and still image data is provided. SOLUTION: Audio data is collectively recorded in an audio data recording area, and still images reproduced during a sound reproduction period of each track and corresponding still image data are collectively recorded in a still image data recording area. . As the individual track control information, information of a set of the entire still image (still image group) designation information for each individual track, the designation of a specific still image within the still image group, and the designation of display timing, Is recorded in the TOC area using the control information including.
Even after the end of the reproduction operation for the selected track, the still image data stored in the still image data memory 5 is stored, and the still image group in the track control information of the next selected reproduction track is If it is determined that the group is the same as the still image group stored in the memory 5, the storage operation from the optical disk to the memory 5 is not performed.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a reproducing method for a recording medium on which audio data and still picture data are recorded. 2. Description of the Related Art In a compact disk (CD) that has appeared as an optical disk for music recording, each music piece to be recorded is managed in units called tracks.
The audio (sound) data of the music is recorded as track data, and the sequential track data is recorded in the recording area of the disk. Also, from among the tracks recorded on the disc, the desired track can be selectively reproduced.
The disk includes track reproduction information (T address, such as start address, end address, reproduction time, etc.) of each track on the disk.
C) is recorded. In recent years, one compact disc (CD) having a diameter of 12 cm for music recording has originally been 6 pieces.
A CD-ROM that records digital data of a computer program and other digital data because a large amount of digital data as large as 00 MB can be recorded, and a CD that records acoustic information and information other than acoustic information
In addition to ROMs, for example, video CDs such as digital video karaoke, music videos, appreciation of animation, teaching materials for English conversation, teaching materials for early childhood education, etc., have become widely used in various fields of application. Recently, DVDs having a larger capacity than video CDs have been put to practical use. For example, the above-mentioned video CD has a file structure conforming to ISO 9660, and has track numbers 1 to 99 between the innermost lead-in area of the disc and the outermost lead-out area of the disc. Is provided. In the lead-in area, a TOC (content list: start address of each track) is recorded, and a track (video CD track) of track number 1 includes various files for disc management and reproduction control. , Still image data, and an application program required for a reproduction operation on a CD-I player. The tracks of track numbers 2 to 99 record a video / audio bit stream compressed by MPEG1, and information indicating the end of the program is recorded in the lead-out area. [0004] As described above, the use of optical discs is expanding, and from the optical disc on which acoustic information and image information are recorded,
2. Description of the Related Art A reproduction apparatus capable of simultaneously reproducing an audio signal and an image signal has become widespread, and a reproduction apparatus capable of switching and displaying a plurality of still images while reproducing high-quality sound (sound) has been provided. The number of the still images is about 10 to 20 per track, and each of the still images is displayed at a designated time in the track. It is believed that satisfactory results can be obtained. FIG. 5 is a diagram for explaining the outline of the arrangement of recording data on a conventional optical disk in which sound data and still image data are mixed and recorded. In the example of the arrangement of recording data on the optical disk shown in FIG. The track control data TC1 to TC3 are recorded in the innermost TOC area of the track control data TC1 to TC3.
3, the track data 1 to 3 are sequentially recorded.
Is provided in the recording area. The track control data TC1 in the figure is control information such as a start address, an end address, and a reproduction time of a track on which the track data 1 is recorded on the disk. Similarly, the track control data TC2 and TC3 are track data. A few are
This is control information such as a start address, an end address, a reproduction time, etc., of the recorded track on the disk. Each of the track data 1 to 3 is as shown in FIG.
As illustrated for the track data 1 in the middle, still image data and sound data are still image / sound data blocks in a state where they are alternately arranged in sequence. [0005] In a conventional optical disk having a recording data arrangement as shown in FIG.
When a certain track data is reproduced from the beginning thereof, continuous reproduction of sound (sound) is possible, and one still image is displayed after reading all the still image data in the block. As a result, sequential still images can be displayed at desired timings. However, when the above-described arrangement mode of the recording data in the conventional optical disc is adopted,
Since the reproduction timing of the still image is determined according to the arrangement mode of the data, the production process of the disc is delayed. Further, in the case where the recording data is arranged as described above, if the change (including the deletion) of the still image data (still image) is performed after the data arrangement is completed, a complicated It is necessary to repeat the work of arranging the same still image data, and even when it is desired to display a specific still image on the same track or between multiple tracks, the same still image data is In addition, since it is necessary to record (arrange) redundantly, there is a possibility that the recording time of the acoustic information may be squeezed within the limited storage capacity of the entire disc. [0006] In order to solve the above-mentioned problems, the present invention provides an audio data recording area in which a plurality of tracks for recording audio data are provided, and still image data. An optical disc having a recording area for still image data and a recording area for track control information for recording the track control information for each track, wherein the recording area for the still image data includes one still image or Still image data corresponding to two or more still images is taken as one group, and a plurality of the groups are continuously recorded in a group unit. In a group having the two or more still image data, each still image is recorded. The image data is continuously recorded, and the track control information is reproduced in association with the reproduction of the sound data of the track corresponding to the track control information. Recording start position specifying information for specifying one group to be assigned, and specifying the one still image data for specifying one still image data in the specified group Recording start position specifying information in the specified group and the specified 1
A set of information specifying the display timing of the still image data, and a method for playing back the optical disc recorded as information including the information. In the track control information for the selected track, the group specified by the recording start position specifying information for specifying one of the groups to be reproduced in association with the reproduction of the sound data of the track is used for the still image data. Controlling the data to be stored in the memory; and, after the group specified by the track control information for the selected track has been stored in the still image data memory, Causing the reproduction of an audio signal based on the audio data in the track to be started; In the track control information for the selected track, the recording start position specifying information for specifying one still image data within the specified group and the display timing of the one still image data are specified. A still image based on the specified one still image data is reproduced from the still image data memory and displayed from the timing based on the specified display timing, based on the information in which the information is paired. A reproducing method. "
Is provided. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a recording apparatus for audio data and still picture data to be reproduced according to the present invention, and a reproducing apparatus to which the present invention is applied; explain. FIG. 1 is a block diagram showing a schematic configuration of a reproducing apparatus to which the present invention is applied, which reproduces an audio signal and a still image signal from a recording medium of audio data and still image data to be reproduced according to the present invention. FIG. 2 is a diagram showing an example of an arrangement of recording data on a recording medium of audio data and still image data to be reproduced according to the present invention. FIGS. 3 and 4 are used to describe a reproduction operation when reproducing an audio signal and a still image signal from a recording medium of audio data and still image data to be reproduced according to the present invention by applying the present invention. FIG. In the reproducing apparatus shown in FIG. 1, reference numeral 1 denotes a disk reproducing unit. The disk reproducing unit 1 includes a driving mechanism of an optical disk, an optical head, a focus control unit and a tracking control unit, a signal processing unit, an operation unit, and the like. It is comprised including. 2 is a control unit, 3 is a changeover switch, 5 is a still image data memory, 6 is a still image decoding and output unit (still image decoding and output unit), and 7 is an audio decoding and output unit (audio decoding and output unit). is there. Here, the arrangement of data on the optical disc to be reproduced by the disc reproducing unit 1 will be described first with reference to FIG. In FIG. 2, T
C1 to TC3 are track control information (track control information T
C1 to TC3 are recorded areas), and the track control information (TC) is the entire still image (still image group) prepared corresponding to each track to be reproduced for each track. ), The designation of a particular still image (still image number) within the entire designated still image (still image group), and the designation of the display timing of the particular still image. It is configured to include a set of information and other information, and a specific example thereof is illustrated in FIG. [0009] The track control information TC is provided individually corresponding to each track to be recorded (placed) on the optical disc. FIG. 2 exemplifying the case of an optical disk on which three tracks are arranged, and three track control information TC1 to TC corresponding to each track.
3 is shown. Each track control information TC1 to TC3
In the example shown in FIG. 2, the recording area in which the control information is recorded is illustrated as being provided on the inner periphery of the optical disc. However, the recording area for the control information is provided outside the optical disc. Is also good. Track data 1, track data 2, and track data 3 in FIG. 2 are acoustic data (sound data) for each track sequentially recorded (arranged) on the optical disk, and are recorded on the optical disk. All of the sound data to be processed, that is, all of the track data 1 to 3 illustrated in FIG. 2 are recorded in a recording area of the sound data in a predetermined arrangement mode. Further, in the still image data recording area in FIG. 2, all of the still image data corresponding to the still image to be reproduced during each sound reproduction period reproduced based on the sound data of each track described above are collected. FIG. 2 shows an example of the arrangement of a plurality of still images in a still image data recording area, which is a recording area in which recording is performed. In the example shown in FIG. 2, the still images to be reproduced during the sound reproduction period based on the track data 1 of the track with the track number 1 are the still image data # 1 to # 3.
# 3 and three still images (three still images indicated by still image numbers # 1 to # 3 belonging to a specific still image group corresponding to the track of track number 1) and a track number The still images to be reproduced during the sound reproduction period based on the track data 2 of the track No. 2 are three still images corresponding to the still image data # 1 to # 3 (the specific still image corresponding to the track of the track number 2). Still images to be reproduced during the sound reproduction period based on the track data 2 of the track with the track number 3 are still images which are still images indicated by the still image numbers # 1 to # 3 belonging to the image group. Five still images corresponding to still image data # 1 to # 5 (five still images indicated by still image numbers # 1 to # 5 belonging to a specific still image group corresponding to the track of track number 3) There is . The term "still picture group" is used to correspond to the "group to which still picture data belongs" shown in FIG. In addition,
Even when the above-described still image group includes only one still image belonging to the still image group, it is treated as one still image group. Further, the “group number to which the still image data belongs” described in FIG. 3 is, for example, sequentially from one end of the still image data area to the still image groups that are sequentially arranged. To 1,
Numbering such as 2 is performed so that each still image group can be distinguished. The example shown in FIG. 2 shows an arrangement mode in which the respective recording areas are arranged as follows: recording area of track control information TC → still image data recording area → recording area of track data. In practicing the present invention, it is needless to say that the arrangement of the respective recording areas may be in the order of the recording area for the track control information, the recording area for the track data, and the recording area for the still image data. Next, a specific example of the track control information will be described with reference to FIG. In FIG. 3, each information such as a track start position, a track end position, and a track reproduction time is the same information as information recorded in a TOC (content list) area of a conventional optical disc.
First, the “recording position of the start end of the still image data corresponding to the still image reproduced during the sound reproduction period based on the track data” is the start position of the specific still image group corresponding to the specific track, and The “end recording position of the still image data corresponding to the still image reproduced during the sound reproduction period based on the track data” is the end position of the specific still image group corresponding to the specific track, and As each position, for example, a sector number of an optical disk can be used. In the reproducing apparatus, a range of a specific still image group to be read can be determined based on the above information before reproducing each track. The "group number to which the still picture data belongs" is used as information for the playback apparatus to specify the still picture group to which the still picture data stored in the still picture data memory 5 belongs. However, depending on the control mode of the playback device, the still image group to which the still image data stored in the still image data memory 5 belongs can be specified by information on the start position and end position of the specific still image group. . As shown in FIG. 3, a specific example of the “still image display information” includes a display start time, a recording position of a start end of still image data, and a recording position of a start end of still image data on a table. , Still image number, and the like. The recording position at the start of the still image data,
Information such as the recording position of the start end of the still image data and the still image number is used to specify the still image to be displayed. The display start time defines a time (timing) at which a still image is displayed starting from the reproduction start time of the track to be reproduced. Note that a sector number may be used as information such as the recording position of the start end of the still image data and the recording position of the start end of the still image data. In FIG. An example is shown in which a sector number starting from is used. In the example shown in FIG. 3, among the three still images indicated by still image numbers # 1 to # 3 belonging to a specific still image group corresponding to a specific track to be reproduced, a still image The two still images # 1 and # 3 are displayed twice each during the reproduction period of a specific track to be reproduced. Next, a specific configuration and operation of the reproducing apparatus illustrated in FIG. 1 will be described with reference to FIG. The user places the optical disk that is to be played back in the disk playback unit 1
The optical head in the optical disk reproducing unit 1 controls the track control information from the track control information area of the optical disk by the control information from the control unit 2 when the information is attached to the disk drive unit of the optical disk unit and the information of the track number desired to be reproduced is input from the operation unit. The information is read and provided to the control unit 2, and the track control information is stored in a memory in the control unit 2 (step S1 in FIG. 4). The control unit 2 checks the storage content of the still image data memory 5 and determines whether valid data, that is, still image data of the optical disc to be reproduced is stored in the still image data memory 5. Is determined (step S2 in FIG. 4). If the still image data is stored in the still image data memory 5, the process proceeds to step S3; otherwise, the process proceeds to step S4. When track reproduction is performed for the first time from the optical disk to be reproduced, there is no valid still image data in the still image data memory 5. In step S3, the still image data stored in the still image data memory 5 is read as still image data of a still image group to be reproduced during the reproduction period of the track to be reproduced. It is determined whether the data is the same as the still image data of the still image data group instructed to be performed. The above determination may be made by comparing the still image group numbers, or may be made by comparing the recording position range information of the still image groups. If it is determined in step S3 that the images are the same still image group, the process proceeds to step S8, and the process proceeds to step S8.
If it is determined in step 3 that the still image group is a different still image group, the process proceeds to step S4. Such a switching operation is performed. The control unit 2 records still image data of a still image group designated to be reproduced by the optical head of the disk reproducing unit 1 during a reproduction period of a track to be reproduced. After moving to the head position of the recording area (step S5 in FIG. 4), the still image data of the specified still image group is read by the optical head, and the read still image data for the still image The still image data of the specified still image group is supplied to the memory 5 and stored in the still image data memory 5 (step S6 in FIG. 4). After the still image data of the specified still image group is stored in the still image data memory 5, the control unit 2 supplies a changeover control signal to the changeover switch 3 so that the data output from the disk reproduction unit 1 Is changed over so as to be supplied to the audio decoding output section 7 (step S7), and the process proceeds to step S8. In step S8, after the control unit 2 moves the optical head of the disk reproducing unit 1 to the head position of the recording area where the specified track data to be reproduced is recorded, the optical head Read the specified track data, and switch it to the changeover switch 3
Is supplied to the audio decoding output unit 7 via the. And the decoding operation of the audio data is performed by the audio decoding output unit 7 in step S9.
An acoustic signal (audio signal) is sent to the output terminal 9. During the above-described sound signal reproduction period, the control unit 2 executes step S1.
0, according to the still image display information in the track control information,
At a specified time (timing), predetermined still image data is read from the still image data memory 5 and supplied to the still image decoding output unit 6. Still image data is decoded by the still image decoding output unit 7, and a still image signal is sent to the output terminal 8. The operation in step S10 is repeated by the number of pieces of designated information specified in the still image display information. As is apparent from the above description, the present invention provides information specifying one piece of still image data in a specified group (still image group), and The information specifying the display timing of the still image data can be reliably obtained as one set, and the accuracy of the display timing of the still image data can be improved. Furthermore, even after the reproduction operation for the track selected as the reproduction target is completed, the still image data of the still image group stored in the still image data memory is kept stored, and the next selection as the reproduction target is performed. According to the information specifying the still image group prepared corresponding to the track in the track control information for the selected track, the still image group to be displayed corresponding to the newly selected track is stored in the still image data memory. When it is determined that the still image group is the same as the still image group that has been stored, it is possible to perform a reproduction operation such that the storage operation of the still image group is not performed from the recording medium to the still image data memory. In the case of the playback operation, unnecessary storage operation in the still image data memory is omitted, so that the sound reproduction between the tracks becomes discontinuous. Period and as it can greatly reduce, according to the present invention the conventional problems described above, all can be satisfactorily solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic configuration of a reproducing apparatus to which the present invention is applied, which reproduces an audio signal and a still image signal from a recording medium of audio data and still image data to be reproduced according to the present invention. It is a block diagram. FIG. 2 is a diagram illustrating an example of an arrangement of recording data in a recording medium of audio data and still image data to be reproduced according to the present invention. FIG. 3 is a diagram used to explain a reproduction operation when reproducing an audio signal and a still image signal from a recording medium of audio data and still image data to be reproduced according to the present invention by applying the present invention. FIG. 4 is a diagram used to describe a reproduction operation when reproducing an audio signal and a still image signal from a recording medium of audio data and still image data to be reproduced according to the present invention by applying the present invention. FIG. 5 is a diagram showing an example of an arrangement of recording data in a conventional recording medium of audio data and still image data. [Description of Signs] 1 Disc playback unit 2 Control unit 3 Switch 5 Still image data memory 6 Still image decoding output unit 7 Audio decoding output unit

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Claims (1)

(57) [Claims 1] An audio data recording area in which a plurality of tracks for recording audio data are provided, a still image data recording area for recording still image data, and each of the aforementioned tracks An optical disc having a track control information recording area for recording track control information for each still image, wherein the still image data recording area includes one still image or two or more still images corresponding to each still image. A plurality of the groups are continuously recorded in a group unit as data, and each still image data is continuously recorded in a group having the two or more still image data. The track control information is a group for specifying one of the groups to be reproduced in association with the reproduction of the sound data of the track corresponding to the track control information. Recording start position specifying information of the group, and recording start position specifying information of the one still image data in the specified group for specifying one still image data in the specified group; And information specifying a display timing of the specified still image data. A method for reproducing information from an optical disc recorded as information including When reproducing a track, the group specified by the recording start position specifying information for specifying one of the groups to be reproduced in association with the reproduction of the audio data of the selected track in the track control information for the selected track. and controlling so as to store in the memory the still image data, tiger with the selected track Causing the reproduction of the sound signal based on the sound data in the selected track to be started after the group specified by the track control information is stored in the still image data memory. And recording start position specifying information for specifying one still image data within the specified group in the track control information for the selected track, and displaying the one still image data According to the information in which the information for designating the timing is paired, the designated 1
Playing back a still image based on the still image data from the still image data memory and displaying the still image from a timing based on the specified display timing. .