KR100389855B1 - Method for recording and/or reproducing still pictures - Google Patents

Abstract

The present invention discloses a recording medium and a recording and / or reproducing method and apparatus for storing virtual deletion information for freezing. The present invention provides a first area having a plurality of still pictures and a second area having first virtual deletion information for each still picture in the still picture group information for grouping and managing the still picture data in the first area within a predetermined maximum number. And when the first virtual deletion information is set to the virtual deletion state, the still image is not reproduced so that a portion of the data file generated according to the user's request is deleted so that the recording area is fragmented. It is possible to prevent the increase of file area information by preventing the scattering phenomenon as much as possible.

Description

How to record and / or play still pictures {Method for recording and / or reproducing still pictures}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of recording and / or reproducing information for efficiently handling still images, and in particular, virtual deletion information to prevent a sudden increase in file area information when a portion of a data file is deleted at the request of a user. And a recording medium and a recording and / or reproducing method and apparatus for storing the same.

Fig. 1 shows the connection of each piece of information and moving picture data in a moving picture, particularly in recording and reproducing audio and / or video (A / V) data on a recordable and / or rewritable recording medium, in particular, a digital versatile disc (DVD). The structure is showing. That is, PGC (Program Chain) information 11 for handling data logically, moving picture information 12 including VOB (Video Object) information, and moving picture data in which actually compressed A / V data is recorded in VOB units. The relationship with the file 13 is shown.

The term is explained first. If a movie is divided into upper and lower parts and recorded, the entire movie becomes a PGC, and the upper and lower parts can be referred to as programs. In addition, each program can be defined by dividing it into several small units of cells, and each cell information can designate an entire VOB representing a certain amount of actual video data file or a part of the VOB. . In this case, each cell is used as a basic unit of access during playback, and the program and the PGC are only information about the connection of a plurality of cells.

In addition, since the actual data is subdivided and recorded in a unit called VOBU (Video Object Unit) on the video data file, the VOB information is composed of information (VOBU # 1, VOBU # 2, ...) for this VOBU data. This VOB information designates the VOB data on the video data file. Here, the VOB data is used as a unit of random access of the disc recording and reproducing apparatus, VOBU is based on one GOP (Group of Picture) in case of Moving Picture Experts Group (MPEG) video, and audio corresponds to video. In other words, VOBU is formed by multiplexing A / V data in sector units.

The data structure shown in FIG. 1 is for moving pictures, and the constituent unit of the actual data is VOB, which is moving image data of a certain time, and all the synchronization and encoding methods of the A / V signals are made in VOB units. However, in the case of a still picture, since the constituent unit is one piece of still picture, one piece of still picture constitutes one VOB. However, if a cell structure is designated as one VOB, a cell is required for each still picture. In this case, there is a problem in that as the number of still images recorded increases, the added information rapidly increases.

In addition, there is a limit on the number of recordable times, since there may be an error in data when a recordable disc is recorded more than a predetermined number of times. In order to limit the number of times and to access data quickly, all information data is a controller that controls the system. As described above, when the amount of information becomes large, it takes a long time to read all the information data, and it is not possible to store all the information in a memory of a constant size, and accordingly, a large amount of still pictures There was a problem that can not be recorded.

On the other hand, in a two-dimensional recording medium such as a disk, one file is distributed and recorded in a space that is not physically contiguous, and information connecting the dispersed areas is recorded as file extent information in the file system. . The file area information is information for logically concatenating one file. In general, the area of the file is distributed as a start position and a data length in order. For example, in FIG. 2, a file is distributed and recorded in two areas, and file area information for indicating this also indicates the start position and length of the two parts. However, when the portion A shown in FIG. 2 is erased and the file is divided into three portions, the file area information is increased as shown in FIG. 3.

That is, as shown in FIG. 3, the amount of information is determined according to how distributed the file area information is regardless of the total size of the file. Therefore, when a plurality of still pictures are recorded on one file, the file area information is rapidly increased when the still pictures are deleted and distributed into various parts at the request of the user.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a recording medium for storing a still image group information including information for grouping a large number of still images into a plurality of still images and managing them as a still image group. have.

Another object of the present invention is to group a plurality of secondary audio data, other than the original audio data added to the still picture data, to manage the secondary audio group, and to include secondary audio data including information for virtually deleting desired secondary audio data. A recording medium for storing group information is provided.

It is still another object of the present invention to record and / or play back and / or to virtually delete desired still images and original audio added thereto by including virtual deletion information in information managed by grouping a large number of still images into a plurality of groups. To provide.

It is still another object of the present invention to include information for virtually deleting desired secondary audio in information managed by grouping a plurality of secondary audios related to still images as a secondary audio group to correspond to still images that are virtually deleted. A method and apparatus for recording and / or reproducing virtually deleted secondary audio is provided.

In order to achieve the above objects, the recording medium according to the present invention is adapted to each still picture in the still picture group information which groups and manages the first area having a plurality of still picture data and the still picture data in the first area within a predetermined maximum number. And a second area having the first virtual deletion information, and when the first virtual deletion information is set to the virtual deletion state, the still image is not reproduced.

The method according to the present invention is a method of recording and / or playing back audio and / or video data on a recordable and / or rewritable recording medium, comprising the steps of: recording a plurality of still pictures to be input and predetermined plurality of still pictures; Recording the still picture group information including the first virtual deletion information for each still picture set by the user in the virtual deletion state by grouping within the maximum number and reproducing information related to the reproduction. I am doing it.

In addition, the method according to the present invention reads out still image group information to be reproduced according to the reproduction information, and reproduces still image data of a calculated position by calculating a desired still image position according to the read still image group information. The still picture in which the first virtual deletion information in the group information is set to the virtual deletion state further includes the step of not reproducing.

An apparatus according to the present invention is an apparatus for recording and / or reproducing audio and / or video data on a recordable and / or rewritable recording medium, comprising: signal processing a plurality of still picture data to be recorded in a first area on the recording medium. Include the first virtual deletion information for each still picture set in the virtual deletion state by the user in the still picture group information for grouping and managing the still picture data in the recording processor and the first area within a predetermined maximum number, and the reproduction order and And a system controller for generating related reproduction information and controlling it to be recorded in the second area.

Further, the apparatus according to the present invention reproduces the still image data in the first region based on the still image group information in the second region, but does not reproduce the still image when the first virtual deletion information is set to the virtual deletion state. It further comprises a regeneration processor.

1 is a diagram illustrating a connection structure between each piece of information in a moving picture and moving picture data.

2 is an example of a file recording position and file area information.

3 is a diagram for explaining the relationship between file distribution and file area information.

4 is a structural example of the entire information structure according to the present invention.

5 is a view showing a connection relationship between each information and still picture data in the still image according to the present invention.

6 is a block diagram of a recording / playback apparatus according to the present invention.

7 is a view showing a relationship between still picture data and still picture group information according to the present invention.

8 is a view showing a relationship between secondary audio data added to still picture data and secondary audio group information according to the present invention.

9 is a diagram illustrating a relationship between cell information and still picture group information.

10 is a diagram illustrating a relationship between cell information, still picture group information, and secondary audio group information.

FIG. 11 is a diagram for describing still picture files and still picture group information virtually deleted according to a still picture deletion command.

FIG. 12 is a diagram for describing secondary audio files and secondary audio group information virtually deleted according to a still image deletion command.

FIG. 13 is a diagram for explaining the deletion of an actual still picture file and still picture group information according to a still picture deletion command of one still picture group.

FIG. 14 is a diagram for explaining deletion of actual secondary audio file and secondary audio group information according to a still image deletion command of one secondary audio group.

15 is a diagram showing the structure of still picture group information according to the present invention.

FIG. 16 is a table showing an example of details of the still picture group general information shown in FIG. 15.

17 is a structure of the still image map table shown in FIG.

FIG. 18 is a table showing an example of the details of a video map for the map shown in FIG. 17.

FIG. 19 is a table illustrating an example of details of an original audio map connected to the video map illustrated in FIG. 18.

20 is a diagram showing the structure of still picture secondary audio group information according to the present invention.

FIG. 21 is a table showing an example of details of the still picture secondary audio general information shown in FIG. 20;

FIG. 22 is a structure of a still picture secondary audio map table shown in FIG. 20.

FIG. 23 is a table showing an example of details of the still picture secondary audio map shown in FIG. 22.

FIG. 24 is a table showing an example of details of cell information for still images shown in FIGS. 9 and 10.

25 is a flowchart according to an embodiment of the still picture recording method according to the present invention.

26 is a flowchart according to an embodiment of a method for recording secondary audio data after recording still images according to the present invention.

27 is a flowchart according to an embodiment of a still picture reproduction method according to the present invention.

28A and 28B are flowcharts according to another embodiment of the still picture reproduction method according to the present invention.

29 is a flowchart according to another embodiment of the still picture reproduction method according to the present invention.

30 is a flowchart according to an embodiment of a data deletion method using virtual deletion information according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a recording medium and a recording and / or reproducing method and apparatus for storing virtual deletion information for the still image according to the present invention.

4 is a configuration example of the entire information structure according to the present invention. Information data, which may be composed of PGC information, moving picture information, and still picture information, may be recorded in one information file or information area.

Here, the general information of the PGC includes information such as the number of programs in the PGC. The general program information includes information such as the number of cells in the program. In the case of a moving picture, the cell information designates one VOB as shown in FIG. 1, and in the case of a still picture, a stationary VOB group (abbreviated as a still picture group) rather than one VOB as shown in FIG. 5. It is supposed to specify. Since this moving picture information has already been described with reference to FIG. 1, the description thereof will be omitted here, and the description will be made mainly on the still picture information according to the present invention. The still picture general information of the still picture information includes the number of still picture group information and the like, and the still picture secondary audio general information contains the number of still picture secondary audio group information and the like.

5 shows a structure of connecting each information and still image data in a still image. That is, in the case of a still picture recorded in the unit of one VOB on the data file, a plurality of still picture VOBs are bundled and managed as a still picture group, and the cell information in the PGC information 21 designates the still picture group information rather than one VOB. . In addition, audio can be added to the still image for recording, and recording of the audio in succession to recording the still image can reduce the search time of the playhead during reproduction. Audio recorded at the same time as the still image is called original audio, and the original audio is included in the still image group. In the present invention, unless otherwise specified, simply refers to still pictures having only video data parts and still pictures in which original audio data parts coexist like video data parts.

The gain obtained by grouping and managing still pictures in this manner reduces not only the number of cell information described above but also still picture information. For example, the video encoding attribute and the original audio encoding attribute in the still image group are the same and stored as common information as the still image group general information. For each still picture, the position in the still picture data file should be indicated. If not, the start point of each still picture should be indicated, but if it is a group, the start of the still picture group is recorded in the file in the general information of the still picture group. It is only necessary to store the position, and record only the respective size as information for each still image. In general, since the amount of information (i.e., number of bytes) for indicating the size of still image data is smaller than the amount of information for indicating the position in the file, the total amount of information can be reduced.

On the other hand, the user can add the second audio to the still image desired by the user after recording the still image and the original audio in the still image file 23. At this time, the original audio data is left as it is, and only the secondary audio is collected and recorded in a separate space in the secondary audio data file 24 or the still image file 23. The management information for the secondary audio is also grouped and managed like the still picture. The concept is the same. That is, a plurality of secondary audios having the same attributes as audio encoding are bundled into a secondary audio group (GAOB), and then common information is recorded as secondary audio group general information, and for each secondary audio data (AOB). It is only necessary to record each size information. The secondary audio group general information includes the position where the audio data of the secondary audio group starts. The connection information (indicated by the bold arrow) for the secondary audio added to the specific still picture is present in the still picture group information (GVOB # 1, GVOB # 2, ...). That is, secondary audio group identification information and secondary audio identification information in the secondary audio group are included as information for designating secondary audio present in the still picture group information.

To find the recording position of a particular still image in the group, the start position of the still image group data in the still image group general information and the size of the data preceding the still image to be searched are added. The starting position of the secondary audio group data in the group general information and the size of the data preceding the secondary audio data to be searched are added.

In the case of the still picture group, since the video part and the original audio part are continuously recorded in one file or space, video information and audio information including these data sizes are also recorded in the order of the actual video data and the bitstream in which the original audio data is recorded. In the case of the secondary audio group, since only the secondary audio data is present, only the secondary audio information is recorded in the bit stream order in which the actual secondary audio data is recorded.

Therefore, FIG. 5 includes a still picture file 23 to which original audio may be added, a file for secondary audio data 24 added to a still picture, PGC information 21, still picture group information, and secondary audio group information. Is present as an information file for the still picture information 22, this secondary audio data can be recorded in a separate area of the still picture file 23 without being recorded in the secondary audio data file 24. The information file including the file 23 for the first region, the file 24 for the secondary audio data, the second region, the PGC information 21 and the still image information 22 may be referred to as a third region. This area becomes a logical area.

Fig. 6 is a block diagram of a recording / playback apparatus for carrying out the present invention. The functions of the apparatus for recording and reproducing A / V data using a recordable and rewritable disc can be broadly divided into recording and playback.

In recording, the AV codec 110 compresses and encodes an externally input A / V signal by a predetermined compression scheme, and provides size information about the compressed data. The digital signal processor (DSP) 120 receives A / V data supplied from the AV codec 110, adds additional data for ECC (Error Correction Code) processing, and performs modulation or the like by a predetermined modulation scheme. A high frequency amplifier (denoted RF AMP: 130) converts electrical data supplied from the DSP 120 into an optical signal. The pickup unit 140 drives a disk, records an optical signal from the RF AMP 130 on the disk, and has an built-in actuator for focusing and tracking. The servo unit 150 receives information necessary for servo control from the RF AMP 130 and the system controller 160 to perform stable servo. Through the interface with the user, the system controller 160 controls the entire system to control recording of still images on the disc, and also records additional information on the recorded still images, in the order of recording of the still images to be recorded and the original audio. Still picture group information is composed of information on each still picture such as the data size of still pictures, the data size of the original audio, the playback time of the original audio, and the position of each still picture group. In the case of adding the secondary audio to the still image, the secondary audio to be added is recorded in a separate file or another area of the file such as a still image, and the information such as the size of the data and the reproduction time for the recorded secondary audio, Secondary audio data can be configured by configuring secondary audio group information, such as information about the location of the secondary audio group. Managing as a group, and information for the respective still pictures includes information indicative of the added second audio.

When the user wants to delete an arbitrary still image through the user interface, the system controller 160 does not actually delete the still image data, but sets the virtual deletion information among the still image group information for the still image to be virtually deleted to delete the still image. do. In other words, data actually exists but is not reproduced during playback, so the user feels that it is deleted. If such a still picture is virtually deleted and the original audio is continuously recorded on the still picture, the original audio is not played. In addition, when the secondary audio is added to the still image, the secondary audio virtual deletion information is set to the virtual deletion state in the group information for the secondary audio so that the user feels that the secondary audio data exists but is not reproduced. .

Along with such information, cell information, which is information related to the reproduction order, is recorded. The cell information includes information indicating a recorded still image group, so that the recorded still image and audio can be reproduced.

At the time of reproduction, the pickup section 140 picks up the optical signal from the disk storing the data, and the data is extracted from the optical signal. The RF AMP 130 converts the optical signal into an electrical signal and extracts a servo signal and modulated data for performing the servo. The DSP 120 demodulates the modulated data supplied from the RF AMP 130 in response to the modulation scheme used for modulation, and performs ECC to correct an error and remove additional data. The servo unit 150 receives information necessary for servo control from the RF AMP 130 and the system controller 160 to perform stable servo. The AV codec 110 decodes the compressed A / V data supplied from the DSP 120 and outputs an A / V signal. The system controller 160 executes a user interface such as processing a user's key input, and uses the cell information and the still picture group information recorded on the disk to make the data desired by the user (only still picture, still picture + original audio or still picture +). Control the entire system to play secondary audio).

That is, in order to reproduce specific still and audio data, the still picture group information including still pictures to be reproduced is obtained from the cell information, and the still picture group size information and the like are obtained from the still picture group information. Information on the reproduction time is obtained to reproduce only the desired data. When secondary audio is added to the still image, the desired secondary audio is reproduced by using the data size and reproduction time information of the secondary audio in the secondary audio group information indicated by the still image group information.

In addition, when the virtually deleted still picture information is read out from the still picture group information, the corresponding still picture and the original audio are not reproduced, so that the data actually exists but does not exist to the user. In addition, even if the added secondary audio is virtually deleted, it is not reproduced similarly.

Here, the AV codec 110, the DSP 120, the RF amplifier 130, and the pickup unit 140 at the time of recording may be referred to as a recording processor, and the pickup unit 140, the RF amplifier 130, The DSP 120 and the AV codec 110 may be referred to as a playback processor.

FIG. 7 is a diagram showing a relation between still picture data and still picture group information according to the present invention. Each still picture group (denoted GVOB) information 201 includes a plurality of sheets having the same attributes (for example, up to 64 pictures). Information on the still picture is recorded, and the plurality of still pictures constituting each still picture group is determined within the maximum still picture. One still picture group information 202 is composed of still picture group general information and information about each still picture, and is information for still picture data 203 including video parts or video parts and audio parts in the order of recorded bitstreams. The still picture group general information is given the start address of the still picture group.

Also, the still picture information in which the original audio exists as information for each still picture exists as map information including video part information for the video part and audio part information for the audio part. In this case, the video map and the audio for one still picture are present. The map has the same identification information, and in the case of only the video part, the map exists as a map only of the video part information. Virtual deletion information for virtually deleting the original audio added to the still image as well as the still image exists in the still image group information 202. Here, one piece of still picture data is recorded in one VOB.

FIG. 8 is a diagram illustrating a relationship between secondary audio data added to a still picture according to the present invention and secondary audio group information. Each secondary audio group (denoted as GAOB) information 211 is included in the information 211. Information for secondary audio data recorded in group units for a plurality of still pictures is recorded, and secondary audio group information 212 for one secondary audio group has a corresponding secondary audio group start address. The secondary audio group is composed of general information and audio maps according to the secondary audio data order. In each secondary audio map, information for secondary audio data 213 made up of a secondary audio part of a still picture is recorded, which includes the size of the secondary audio data. In addition, the secondary audio group information 212 includes virtual deletion information for virtually deleting each secondary audio.

FIG. 9 is a diagram illustrating a relationship between information of a cell (which may be referred to as reproduction information) and a still picture group information, which is a logical unit related to a display related to a reproduction order, wherein the cell information is identification information (GVOB_ID) of the still picture group. And still picture reproduction start identification information (START VOB_ID) and still picture reproduction end identification information (END_VOB_ID) in the corresponding still picture group, and this cell information may correspond to the whole still picture group or a part of the still picture group that the user wants to play. I can display it.

On the other hand, the secondary audio data is stored in a separate space from the still picture data, which may be stored in a separate file, or may be stored in a separate area within the same file as the still picture data.

For example, when the secondary audio data is stored in a file separate from the still picture data, as shown in FIG. 7, GVOB # 1, # 2, and # 3 having the still picture data constitute one file. 8, GAOB # 1, # 2, # 3 having secondary audio data constitutes one file, and when recording / playback of actual still image or secondary audio data is performed. Is accessed using the respective file information.

For example, when the second audio data and the still picture data are configured as one file, the GVOB # 1, # 2, # 3, and GAOB # 1, # 2, # shown in FIGS. 7 and 8 will be described. All three make up one file. Of course, in this configuration, each GVOB and GAOB may be mixed according to the recording order, for example, GVOB # 1, GVOB # 2, GAOB # 1, GVOB # 3, GAOB # 2, and GAOB # 3. GVOBs can be bundled together and GAOBs can be bundled together to form a file.

FIG. 10 is a diagram showing a relationship between cell information, still picture group information, and secondary audio group information in order to designate desired secondary audio in a secondary audio group in which audio added to a still picture is recorded in a separate area as well as the original audio. For example, the cell information includes identification information (GVOB_ID) of the still picture group, still picture reproduction start identification information (START VOB_ID) and still picture reproduction end identification information (END VOB_ID) in the still picture group, and includes information on the still picture group (GVOB #i). In the video part information in the group information, information for specifying secondary audio added to a still picture, that is, secondary audio group identification information (GAOB_ID) and secondary audio (AOB) identification information (AOB_ID) in the corresponding secondary audio group are recorded. Can be. For example, in the video part information for the still picture # 2 of the still picture group GVOB #i, there is identification information # 2 which is the second audio map in the second audio group identification information GAOB #j and GAOB #j.

In the present invention, when a plurality of still pictures are recorded on one file, when the still pictures are deleted by the user's request and distributed into several parts, the still pictures are grouped into a plurality of chapters to prevent the file area information from rapidly increasing. The virtual deletion information is stored in each still image so that even if the user erases a still image, the image is not actually deleted from the file but is simply not reproduced at the time of playback by using the virtual deletion information. However, in order to erase still images, there is a reason for securing a free space (free area) for newly recording data. Therefore, the data is not actually erased using only this virtual deletion information, so no empty space is secured. On the other hand, when all still pictures in the still picture group information are virtually erased, the free area is secured by actually erasing the file in the still picture group unit. In other words, a still image group is a collection of a plurality of still images, and if this is deleted from the file, there is a considerable amount of free space.

As shown in FIG. 11, when a still image deleting command is input by a user through an input device 301 such as a keypad mounted on a remote controller or still image output device 302, the actual still file 304 is not included. The virtual deletion information in the information on the still picture in the still picture group information 303 is set to " 1 " Since there is no change in the actual still file 304, the file area information for the still picture file does not increase. This virtual deletion information is also commonly applied to the original audio imposed on still pictures. In other words, when the still image is virtually deleted, the original audio is also regarded as virtually deleted. Here, if the virtual deletion information in which the virtual deletion state "1" is set is invalidated to "0" again, the still image can be restored.

However, if secondary audio is added to the still picture, virtual deletion information (which may be referred to as first virtual deletion information) of the still picture may be used, but virtual deletion information in the secondary audio group information as shown in FIG. (Which may be referred to as second virtual deletion information) may be used. When a still picture deletion command is input by the user through the input device 311, the virtual deletion information of the still picture of the still picture group information 313 is set to the virtual deletion state "1", and this still picture secondary audio group information 314 is performed. The virtual deletion information of the secondary audio information therein is also set to the virtual deletion state "1". Thus, the secondary audio file 315 also does not actually delete the secondary audio. Here, the second audio may be restored by invalidating the virtual deletion information having the virtual deletion state "1" set to "0" again.

On the other hand, the case where deletion in the actual file occurs in the still picture group or the secondary audio group will be described with reference to FIGS. 13 and 14. That is, when all information in a group is virtually deleted, it can be actually deleted from the file of the group.

As shown in FIG. 13, a command for virtually deleting all still images in the still picture group # 2 information is input by the user through the input device 321, and virtual deletion in the still picture group # 2 information in the still picture group information 323 is performed. If all the information is set to the virtual delete state "1", the still image group # 2 information in the still image group information 323 is deleted to generate the updated still group group information 324, and the actual GVOB # in the actual still file 325 is generated. 2 The data is deleted and allocated to the free area. Thus, although a plurality of still images have been deleted, the discontinuity in the still image file is determined by erasing the entire group, so the file area information increases much less. In FIG. 13, the still picture group identification number is sequentially assigned again, but may be maintained if it is explicitly stored in the still picture group information.

Similarly, the data of the secondary audio group file can also be actually deleted. As shown in FIG. 14, the virtual deletion information of the corresponding still pictures in the still picture group information 331 is stopped by the still picture deleting command. It is a case where virtual deletion information of all the secondary audio information of the secondary audio group # 3 information is set to the virtual deletion state "1" in the still pictures secondary audio group information 332 set to "virtual deletion state".

The secondary audio group # 3 information in the secondary audio group information 332 is deleted and updated secondary audio group information 333 is generated, and the actual GAOB # 3 data in the actual secondary audio file 334 is deleted. It is allocated to the free area. Even in this case, the amount of increase in file area information is small. In FIG. 14, the secondary audio group identification numbers are sequentially assigned again, but may be maintained if they are explicitly stored in the secondary audio group information.

FIG. 15 is a diagram illustrating the structure of still picture group information according to the present invention. The still picture group information includes still picture group general information and a still picture map table, and may further include still picture property information such as a picture size and an image encoding mode. .

FIG. 16 is a table showing an example of the details of the still picture group general information shown in FIG. 15, wherein the still picture group general information includes GVOB_ID as information for identifying a still picture group in the still picture file, and in the still picture group in the still picture file. GVOB_S_ADR indicating the start address of the first still picture data, GVOB_Ns indicating the number of still pictures in the still picture group, and GVOB_Ds indicating the number of virtual pictures deleted virtually in the corresponding VOB group. If the GVOB_Ds and GVOB_Ns are the same, this VOB group can be deleted from the AV file. In case GVOB_Ds is not stored explicitly, all still pictures in the corresponding still picture group are determined to be virtually deleted to check whether they are actually erased. In addition, the identification information GVOB_ID may be explicitly recorded as unique for each still picture group in the still picture file, and may be implicitly represented as # 1, # 2, ..., etc. in the still picture group order.

FIG. 17 is an example of the structure of the still image map table shown in FIG. 15, in which a map composed of n maps has two maps, one of which is a video map (VMAP) for a video part, and the other is present in still images. An audio map (AMAP) for the original audio part. The order of the map is the same as the data order of the recording bitstream in the still file as shown in FIG. Therefore, when the still image is only video, only the video map is used, and when the original audio is together, the video map and the audio map are recorded together, which can be viewed as one map using substantially the same identification information.

FIG. 18 is a table showing an example of the details of a video map, which shows the type of the corresponding map, and in the case of a video map for a video part, includes MAP_TY, which is "0" in binary, and identification information (VOB_ID) for this video part. This VOB_ID represents 1 to 64 as a preferred embodiment, and the VOB_ID may be explicitly represented, and may be implicitly represented as # 1, # 2, # 3, ... in the order recorded. Can be.

Also, the video map indicates whether or not this VOB is to be deleted, V_DELETE indicating that it is not deleted if "0" in binary, V_DELETE indicating virtual deletion, and V_PART_SZ indicating the size of a video part. Information, if there is a secondary audio of this still image, the value of the secondary audio group identification information is present; otherwise, its value is "0"; if there is a secondary audio of this still image, it is within the secondary audio group. Identification information is shown, and if not present, secondary audio identification information (AOB_ID) and the like whose value is "0".

Here, if V_DELETE is "1", the still picture is virtually deleted. If the original audio is present in the still picture, the audio is also virtually deleted. This is because it is meaningless that the original audio added to the still image is deleted when the still image is deleted. In addition, VOB_ID and V_PART_SZ may be referred to as still position information, and GAOB_ID and AOB_ID may be referred to as secondary audio connection information.

19 is a table showing an example of the details of an audio map, which shows the type of the map, and in the case of an audio map for an audio part, MAP_TY in binary "1", A_PBTM indicating the playing time of the audio, and the size of the audio part. It includes A_PART_SZ and so on.

20 is a diagram showing the structure of still picture secondary audio group information according to the present invention, wherein the still picture secondary audio group includes the still picture secondary audio general information and the still picture secondary audio map table. And the like may be further included.

FIG. 21 is a table showing an example of the details of the still picture secondary audio group general information shown in FIG. 20. FIG. 21 shows GAOB_ID representing secondary audio group identification information in a file for secondary audio and a corresponding secondary in a file for secondary audio. GAOB_S_ADR indicating the start address (which may be referred to as position information of the secondary audio group) where the first secondary audio data in the audio group starts, GAOB_Ns indicating the number of secondary audios included in the secondary audio group, and the like. Include. This GAOB_ID may be explicitly indicated or implicitly in the order in which it is recorded.

22 shows an example of the structure of a secondary audio map table composed of n secondary audio maps for secondary audio parts.

FIG. 23 is a table showing an example of the details of the secondary audio map shown in FIG. 22, which shows identification information for a particular secondary audio in the secondary audio group, which is 1 to 64 as a preferred embodiment. A_ID which can be indicated, A_DELETE indicating whether the secondary audio portion has been deleted virtually, A_PBTM indicating the secondary audio reproduction time, A_PART_SZ indicating the secondary audio data size by the number of sectors, and the like. Here, AOB_ID may be explicitly recorded, or may be implicitly represented as # 1, # 2, # 3, ... in order within the group.

FIG. 24 is a table showing the details of the cell information as the reproduction information shown in FIGS. 9 and 10. S_GVOB_ID representing the still picture group identification information, S_VOB_ID representing the identification information of the playback start stop picture and the playback end stop picture in the still picture group. E_VOB_ID indicating identification information.

Fig. 25 is a flowchart according to an embodiment of the still image recording method according to the present invention, which shows a method of recording still images and original audio. First, it is set whether to record only still pictures or to record original audio data simultaneously with still pictures (step S101). The still picture group information is generated, the group identification information is assigned, the number of still pictures in the still picture group is set to "0", and the still picture group start position in the still file is recorded (step S102). It is judged whether or not the still picture recording start signal is input from the user (step S103), and when the recording start signal is input, the still picture is recorded in the still picture file, the identification information for the still picture recorded in the video map is allocated, and the number of still pictures in the still picture group information is determined. Is increased by one, and the still image size information is recorded in the video map (step S104).

It is determined whether the user setting is a mode for recording the original audio at the same time as the still image (step S105), and if the user setting is the mode for recording the still image and the original audio, the audio data for the still image is continuously recorded in the still image file in the still image. The audio size information is recorded in the audio map in the still picture group information (step S106).

It is determined whether the number of recorded still pictures constitutes one group (for example, up to 64) (step S107). If one group information is configured, the process proceeds to step S102 to generate another still picture group information; The flow advances to step S103 to determine whether a recording start signal is input.

In step S105, if the user setting is a mode for recording only still pictures, the process proceeds to step S107 to record the next still picture without going to step S106, and in step S103, it is determined whether to end recording if a still picture recording start signal is not input from the user. If it is determined that recording is to be terminated (step S108), the cell information is recorded and then terminated (step S109). Here, the cell information may be generated one by one for every still picture group as an initial value so that all still pictures are reproduced.

Fig. 26 is a flowchart of a method for recording secondary audio data after recording still images according to the present invention. First, the secondary audio group information is generated, the secondary audio group identification information is assigned, the number of audio in the secondary audio group information is set to "0", and the audio group start position information in the secondary audio file is recorded. (Step S201).

It is determined whether the secondary audio recording start signal is input from the user (step S202), and when the secondary audio recording start signal is input, a specific still picture which the user wants to add the secondary audio data is designated (step S203). Record secondary audio data in a file for secondary audio, assign secondary audio identification information in an audio map of secondary audio group information, increase the number of audios in the secondary audio group information by one, and secondary audio in an audio map. The size information is recorded (step S204). Although the second audio data is described as being stored in a file separate from the still picture data, the secondary audio data may be stored in a separate area within the same file as the still picture data.

The still image group identification information and the still image identification information of the designated still image are read out, and the information for this still image, that is, the secondary audio group identification information and the secondary audio identification information for the secondary audio is recorded in the video map of the designated still image (S205). step).

It is determined whether the number of secondary audio maps in the secondary audio group information is the number N constituting the group (step S206). When the group information is configured, the process proceeds to step S201 to generate other secondary audio group information. If not, the flow proceeds to step S203 for determining whether a second audio recording start signal is input from the user. If the second audio recording start signal is not input from the user in step S203, the process ends.

Here, the step of specifying a specific still picture (step S203) may be set before the step (step S202) of determining whether the secondary audio recording start signal is input.

Fig. 27 is a flowchart according to an embodiment of the still image reproduction method according to the present invention, which shows a method of reproducing still image and the original audio data added thereto. In Fig. 27, first, PGC information and cell information are read (step S301), and the still picture group indicated by the cell is read out from the cell information by reading still picture identification information, reproduction start identification information, reproduction end identification information, and the like. Read the information (step S302). Obtain the video map (VMAP) information for the video part corresponding to the playback start identification information in the read still image information, read the size of the video part, etc., and if the still image has the original audio, obtain the video map and audio map information to obtain the video part. The size and audio size information are read out (step S303).

The desired still image position is calculated according to the read video part information, and the still image is reproduced by reading and decoding the video data of the calculated position (step S304). Here, the desired still image position is obtained by summing the still group group starting position and the size of the data preceding the desired still image. It is determined whether or not the original audio is added to the still image while the still image is reproduced (step S305). If the original audio is added to the still image, the original audio data is read and decoded to reproduce the original audio (step S306). Here, the read position of the original audio is obtained by summing the calculated still image position and the size of the video part of the still image. After checking whether all still images belonging to all cells have been played back using the cell information, it is determined whether there are still still images to be played next (step S307), and if there are still still images to be played back, information for the video part of the next still image is read out. Proceeds to step S303 and terminates otherwise. If there is a plurality of cell information, this process is repeated again.

Here, the step (S305) of determining whether or not the original audio is added to the still picture may be performed immediately after the reading of the still picture group information (step S302), and according to the read still picture group information on the map for the video part. This is because it is possible to determine that the original audio is added to the still picture when the map for the audio part is added in succession.

28A and 28B are flowcharts of another embodiment of a still picture reproduction method according to the present invention, which shows a method of reproducing a still picture or a still picture to which original audio is added or a still picture to which secondary audio data is added. In Fig. 28A, first, cell information in PGC information is read (step S401), and still group information indicated by a cell to be reproduced is read (step S402).

The start position of the still image group is read from the read still image group information, and the desired still image position is calculated (step S403). Here, the desired still image position is obtained by summing the still group group starting position and the size of the data preceding the desired still image. The video data is read and decoded according to the calculated desired still picture position information to reproduce the still picture (step S404).

It is checked from the still picture group information whether secondary audio exists (step S405), and if there is no secondary audio, it is determined whether original audio exists (step S406). Here, the presence of the secondary audio can be determined by using the secondary audio group identification information and the secondary audio identification information in the map information for the video part of the still picture to be reproduced, and the existence of the original audio is determined by the still picture to be reproduced. This can be determined by determining whether there is audio information (audio map) in the map table.

If the original audio exists in step S406, the reading position of the original audio is calculated (step S407). Here, the reading position of the original audio is obtained by adding up the still image position calculated in step S403 and the video part size of the still image. After the original audio data is read and decoded from the calculated original audio position information to reproduce the original audio (step S408), the process proceeds to step S411 in Fig. 28B.

On the other hand, if the secondary audio is present in step S405, that is, the secondary audio group identification information and the secondary audio identification information designated for this still image are read out, and if it is not "0", the start position of the secondary audio group information from the secondary audio group information. Calculate the desired secondary audio position (step S409 in FIG. 28B). The desired secondary audio position is obtained by summing the secondary audio group start position and the magnitudes of the secondary audios located before the secondary audio with the secondary audio identification information specified in this secondary audio group.

After reading and decoding the secondary audio data from the calculated desired secondary audio position information and playing the secondary audio (step S410), it is determined whether there is still picture to be played next (step S411), and if there is still picture to be played back, S403. Proceed to step, otherwise ends (step S411). In the case of reproducing a plurality of cells, the entire process is repeated.

Here, instead of the step S405 for determining whether the secondary audio exists and the step S406 for determining whether the original audio exists, whether the still picture to be reproduced from the still picture group information read out in step S402 is a still picture consisting only of video parts or not. First, it is determined whether the still image has been added or the secondary audio is added, and if the still image is composed of only video parts, steps S403 and S404 are performed. If the original audio is added, the steps S403, S404, S407, and S408 are performed. If the second audio is added to the still image, the flowchart may further include a flowchart according to another example of the reproduction method of performing steps S403, S404, S409, and S410 and then proceeding to step S411.

In addition, it is also possible to set whether to play only still pictures, to play still pictures and original audio, or to play still pictures and secondary audio through the user interface, and to play back according to the set mode.

29 is a flowchart illustrating a still picture reproducing method according to another embodiment of the present invention, and illustrates a method of reproducing data when the virtual deletion information in the still picture group information is set to the virtual deletion state. In Fig. 29, first, the PGC information and the cell information are read (step S501), and the still picture group indicated by the cell by reading the still picture group identification information, the reproduction start identification information, the reproduction end identification information, etc. to be reproduced from the cell information. The information is read (step S502). The video map (VMAP) information for the video part corresponding to the reproduction start identification information in the read still picture group information is obtained to read the size of the video part, virtual deletion information, and the like (step S503).

Since it is determined whether the virtual deletion information is set to the virtual deletion state and the still image set to the virtual deletion state is not played, step S508 is performed without playing the video.

If it is not set to the virtual erase state in step S504, a desired still position is calculated according to the read video part information, and the still image is reproduced by reading and decoding the video data of the calculated position (step S505). Here, the desired still image position is obtained by summing the still group group starting position and the size of the data preceding the desired still image. When the still picture is reproduced, it is determined whether audio is added to the still picture (step S506). If audio is added to the still picture, audio data is read and decoded to reproduce the audio (step S507). Here, there are two kinds of audio added to the still picture, the original audio recorded simultaneously with the video data of the still picture and the secondary audio added at the time of the after recording. Only one of them may exist or both may exist. When both audios are present, the secondary audio can be automatically played or one audio can be selected and played by the user's selection.

Here, the read position of the original audio is obtained by adding up the calculated still image position and the size of the video part of the still image, and the secondary audio position has the secondary audio group start position and the secondary audio identification information specified in the secondary audio group. This can be achieved by summing the magnitudes of the secondary audios located before the secondary audio.

After checking whether all still images belonging to all cells have been played using the cell information, it is determined whether there are still still images to be played next (step S508), and if there are still still images to be played back, information for the video part of the next still image is read out. Proceed to step S503 and exit otherwise. If there is a plurality of cell information, this process is repeated again.

30 is a flowchart according to an embodiment of a data deletion method using virtual deletion information when a user actually wants to delete a specific still picture and / or secondary audio. In Fig. 30, a specific still image deletion command is input by the user (step S601). By this still picture deletion command, the virtual deletion information is set to " 1 " which is the virtual deletion state in the still picture in the still picture group information (step S602). It is determined whether the virtual deletion information of all still pictures in the still picture group is set to the virtual deletion state "1" (step S603). If all still pictures in the still picture group are set to the virtual deletion state, the still picture group information is included in the still picture group information. Is actually deleted, the still group information is updated (step S604), and all data of the still group is actually deleted in the still image data file to set the area of the still group as a free area (S605). step). By setting this as the free area, another still image or moving picture can be recorded in this area, and the file area is updated in the file system.

It is determined whether there is secondary audio in the virtual deleted still image (step S606), and if there is secondary audio, the virtual deletion information is set to the virtual deletion state "1" in the corresponding secondary audio in the secondary audio group (S607). step). It is determined whether the virtual deletion information of all the secondary audios in the secondary audio group is set to the virtual deletion state "1" (step S608), and the virtual deletion information of all the secondary audios in the secondary audio group is virtually deleted. If the state is set to "1", the secondary audio group information is actually deleted from the secondary audio group information, and the secondary audio group information is updated (step S609), and the corresponding secondary audio group data in the secondary audio file is updated. Also actually deletes (step S610).

As described above, the present invention does not reproduce virtual erased still images during reproduction using the virtual deletion information, thereby preventing the recording area from being fragmented when a part of the data file is deleted by the user's request. There is an effect that can prevent the file area information from increasing rapidly.

According to the present invention, the original audio added to the still picture virtually deleted by the virtual deletion information can also be virtually deleted, and the secondary audio data corresponding to the still picture can also be virtually deleted, and the still picture or two virtually deleted in group units. The difference audio has the effect that it can be actually deleted on the file and freed up as a free area for recording new data.

In addition, the present invention has the effect that can be displayed and edited in each unit of still image when recording and playing back secondary audio data as well as a large amount of still image and the original audio added thereto using minimal information data. Can correspond to the after-recording of the audio data, and the effective information management can be performed by constructing the video map and / or the audio map information of the still image information in the order of the recorded bitstreams.

Claims (38)

A method of recording and / or playing back audio and / or video data on a recordable and / or rewritable recording medium: Recording at least one still image data on the recording medium; And Dividing the plurality of still images into a group capable of having a predetermined maximum number of still images, and recording still image group information including first virtual deletion information for each still image indicating a virtual deletion state set by a user; And recording and / or reproducing the method. The method of claim 1, wherein the recording of the plurality of still pictures further comprises recording the original audio data added to the corresponding still picture among the still pictures after the corresponding still picture. . The apparatus of claim 1, wherein the still picture group information includes position information about a start position of the still picture group data, still picture group general information having information related to the number of video parts of the still picture group, and position information about each still picture. Recording and / or reproducing, characterized in that it comprises information about the still image having. The method of claim 1, After the corresponding still image is recorded, recording additional audio data added to the corresponding still image in a separate area; And When the virtual deletion state is set, the additional audio data is managed to manage the additional virtual data and the second virtual deletion information for virtually deleting the additional audio data corresponding to the still image having the second virtual deletion information at a group level. Recording additional audio group information including information for separating into a predetermined maximum number of groups, And the second virtual deletion information is in the additional audio data separation information, and recording information representing the additional audio data corresponding to the still picture is in the still picture group information. 5. The apparatus according to claim 4, wherein the still picture group information includes general information including start position information of each still picture group and information related to the number of video parts of each still picture group, location information of each still picture of each still picture group, and And information on a still image having information representing corresponding additional audio data. 6. A method according to claim 5, wherein each still picture has a video part, and the position information for the still picture includes first virtual erase information and size information for each video part. . 7. The method of claim 6, further comprising recording raw data added to the corresponding maintenance picture, wherein the position information of the still picture further includes size information for each of the original audio data added to the corresponding still picture. Characterized in that the recording and / or reproducing method. 5. The recording and / or reproducing method of claim 4, wherein the information representing the additional audio data includes identification information for each additional audio group and identification information for the additional audio data of each additional audio group. Way. 5. The method of claim 4, wherein the additional audio group information includes additional audio group general information including start position information of each additional audio group and information on the number of additional audio data in each additional audio group. Recording additional audio group information including information on data, wherein the additional audio data includes second virtual deletion information and size information for each of the additional audio data in each additional audio group; / Or how to play. 10. The apparatus of claim 9, wherein the additional audio group general information further includes identification information for each additional audio group, and the information about the additional audio data is identification information for each of the additional audio data of each additional audio group. Recording and / or reproducing method further comprising. 5. The method of claim 4, wherein the additional audio data is stored in a file different from the file for the still picture data. 5. The method of claim 4, wherein the additional audio data is stored in a separate area within the same file as the file for the still picture data. The method of claim 1, Reading still image group information reproduced according to the reproduction information; And The first position of the desired still image is calculated according to the read still image group information, and the still image located at the calculated first position is reproduced, wherein the first virtual deletion information in the read still image group information is set to the virtual deletion state. The still image further comprises the step of not reproducing the recording and / or reproducing method. The method of claim 13, Calculating raw audio data continuously after a corresponding still of said still pictures; And The second position of the original audio data corresponding to the desired still image is calculated according to the read still image group information, and the original audio data of the calculated second position is reproduced, wherein the first virtual deletion information in the read still image group information is reproduced. And not reproducing the original audio data corresponding to the still image in which the virtual deletion state is set to the virtual erase state. The method of claim 13, wherein calculating the first position comprises: Determining whether all still pictures in the same still picture group are set to the virtual erase state; And If all still pictures in the still picture group are set to the virtual erase state, deleting all data in the still picture group and corresponding still picture group information. The method of claim 13, Recording additional audio data corresponding to one of the still pictures, arranging into a plurality of additional audio data groups, and having second virtual deletion information for each additional audio data indicating a virtual deletion state set by a user; Recording additional audio group information; And If the read still picture information contains information indicating one of the additional audio groups, a second position of the additional audio data for the corresponding predetermined still picture is calculated according to the additional audio group information, and at the second position And reproducing the additional audio data, wherein the additional audio data corresponding to the predetermined still image having the first virtual deletion information set to the virtual deletion state is not reproduced at the second position. / Or how to play. 17. The method of claim 16, wherein calculating the second position Determining whether all additional audio data in the same one additional audio group is set to a virtual erase state; And And deleting all the data in the corresponding additional audio group and the corresponding additional audio group information when all the additional audio data in the additional audio group is set to the virtual deletion state. How to play. 17. The method of claim 16, wherein calculating the second position of the additional audio data corresponds to a start position of the additional audio group in the additional audio group information including the additional audio data corresponding to the predetermined still picture. And summing the magnitudes of the data prior to the additional audio data. From a recording medium having a plurality of still pictures divided into a plurality of groups, still picture group information having first virtual deletion information for each still picture representing a virtual deletion state set by a user, and reproduction information related to reproduction; In the method for playing back still pictures, Reading the still picture group information according to the reproduction information; Calculating a first position of a still picture among the still pictures according to the read still picture group information; Reproducing the still picture located at the calculated first location, and when the first virtual deletion information included in the read still picture group information for the still picture at the calculated first location is set to a virtual deletion state, the And reproducing the still picture at the calculated first position. 20. The recording medium according to claim 19, wherein the recording medium further comprises original audio data recorded continuously after a corresponding one of the still pictures, Calculating a second position of the original audio data corresponding to the predetermined still picture according to the read still picture group information; Reproduces the original audio data located at the calculated second position and has the first virtual deletion information included in the read still picture group information in which a predetermined still picture corresponding to the original audio data is set to a virtual deletion state; And not reproducing the original audio data. 21. The method according to claim 20, wherein the calculating of the first position of the predetermined still picture precedes the start position of the still picture group including the predetermined still picture among the still picture groups in the read still picture group information and the predetermined still picture. Summing the size of the data, wherein calculating the second position of the original audio data comprises summing the first position of the predetermined still picture and the size of the video part of the still picture. How to play. 20. The reproduction method according to claim 19, further comprising the step of: reproducing the predetermined still picture when the virtual deletion state of the first virtual deletion information is cleared. 20. The method of claim 19, wherein calculating the first position Determining whether all still pictures of the same one still picture group are set to the virtual erase state; And deleting all data of the still picture group and corresponding still picture group information when all still pictures in the still picture group are set to the virtual erase state. 20. The recording medium according to claim 19, wherein the recording medium is divided into a plurality of additional audio data groups, and each of the still pictures representing the virtual erasing state set by the user and the additional audio data corresponding to each of the still pictures. Further comprising additional audio group information having virtual deletion information, wherein the step Calculating the second position of the additional audio data for the corresponding predetermined still picture according to the additional audio group information when the read still picture information includes information indicating one of the additional audio groups; The additional audio data at the second position having the second virtual deletion information corresponding to the predetermined still image having the first virtual deletion information set to the virtual deletion state is reproduced with the additional audio data at the second position. And not reproducing. 25. The method of claim 24, further comprising reproducing the corresponding additional audio data when the virtual deletion state of the second virtual deletion information is invalidated. The method of claim 24, wherein calculating the second position Determining whether all additional audio data in the same one additional audio group has been set to the virtual erase state; And deleting all data in the additional audio group and deleting the corresponding additional audio group information when all the additional audio data in the additional audio group is set to the virtual deletion state. 27. The method of claim 26, wherein calculating a second position of the additional audio data includes: corresponding to the first position of the additional audio group including the additional audio data corresponding to the predetermined still picture in the additional audio group information. Summing up the size of data preceding the additional audio data. 21. The recording medium according to claim 20, wherein the recording medium is divided into a plurality of additional audio data groups, and each of the still pictures representing the virtual deletion state set by the user and the additional audio data corresponding to one of the still pictures. And additional audio group information having virtual deletion information. Calculating a third position of the additional audio data for the corresponding predetermined still picture according to the additional audio group information when there is information indicating one of the additional audio groups in the read still picture group information; Second virtual deletion information corresponding to the predetermined still data that reproduces the additional audio data at the third position and has the first virtual deletion information in which the additional audio data at the third position is set to a virtual erase state; And not reproducing the additional audio data at the third position when having a. 29. The method of claim 28, further comprising: reproducing the corresponding additional audio data when the virtual deletion state of the second virtual deletion information is invalidated. The method of claim 28, The calculating of the third position Determining whether all additional audio data in the same one additional audio group is set to the virtual erase state; And deleting all data in the additional audio group and the corresponding additional audio group information when all the additional audio data in the additional audio group is set to the virtual deletion state. The method of claim 30, Calculating the third position of the additional audio data Summing a first position of the additional audio group including additional audio data corresponding to the predetermined still picture in the additional audio group information and the size of data preceding the corresponding additional audio data. How to play. A method for reproducing a still picture from a recording medium having a plurality of still pictures divided into a plurality of groups, and still picture group information having first virtual deletion information indicating a virtual deletion state set by a user for each still picture. In Reading the still picture group information including the first virtual delete information; Determining whether first virtual deletion information for a still image reproduced among the still images is set to a virtual deletion state; When the first virtual deletion information is not set to the virtual deletion state, the playback is performed on the still image that is played. If the first virtual deletion information is set to the virtual deletion state, the playback is not performed on the played still image. The reproduction method characterized by the above-mentioned. 33. The method of claim 32, The recording medium further includes original audio data recorded consecutively after the corresponding still image among the still images, the method further comprising: Determining whether there is original audio data corresponding to the still image to be reproduced; And reproducing the original audio corresponding to the still image reproduced only in response to the reading and decoding of the reproduced still image when the first virtual erase information is set to the first virtual erase state. Way. 33. The method of claim 32, Reading cell information indicating a group of still pictures to be reproduced and a reproduction order of said still pictures; After reading and decoding the reproduced maintenance picture, determining whether or not another still picture of the still pictures is to be reproduced according to the cell information. 33. The method of claim 32, The recording medium is divided into a plurality of additional audio data groups and has additional audio data corresponding to one of the still pictures and second virtual deletion information for the respective still pictures indicating a virtual deletion state set by a user. Further includes audio group information, The method includes determining whether there is additional audio data corresponding to a still picture to be played; Read and decode the additional audio data corresponding to the still image that is reproduced when the first virtual deletion information is not set to the virtual deletion state, and reproduced when the first virtual deletion information is set to the virtual deletion state. And not performing reading and decoding on additional audio information corresponding to the still picture. 36. The method of claim 35 wherein And the first and second virtual deletion information always have the same value. The method of claim 33, wherein The recording medium is divided into a plurality of additional audio data groups and has additional audio data corresponding to one of the still pictures and second virtual deletion information for the respective still pictures indicating a virtual deletion state set by a user. Further includes audio group information, The method is Determining whether there is additional audio data corresponding to the still image to be reproduced; Read and decode the additional audio data corresponding to the still image that is reproduced when the first virtual deletion information is not set to the virtual deletion state, and reproduced when the first virtual deletion information is set to the virtual deletion state. And not performing reading and decoding on additional audio information corresponding to the still picture. The method of claim 37, Reading cell information indicating the still image group to be reproduced and the reproduction order of the still images; Determining whether another still of said still pictures is to be reproduced according to said cell information after reading and decoding of the still picture to be reproduced.