JPWO2004028157A1 - Data recording method, data reproducing method, data recording device, data reproducing device, data recording medium, program, and recording medium storing the program - Google Patents

Abstract

This data recording apparatus displays the presence / absence of extended additional information on the index display screen by providing identification information (flag) indicating whether or not extended additional information is added to each content in the index information. Therefore, the trouble of actually accessing the content and checking the presence / absence of the extended additional information can be omitted, and the presence / absence of the extended additional information can be checked more easily.

Description

  The present invention relates to a data recording method, a data recording apparatus, a data recording medium, a data reproducing method, and a data reproducing apparatus for recording video data, audio data, and the like on a randomly accessible recording medium such as a hard disk, an optical disk, and a semiconductor memory. , A program, and a recording medium storing the program.

In recent years, digital recording / playback apparatuses for contents recorded on media such as optical disks (hereinafter referred to as video disk recorders) are becoming widespread. As a recording format of content on a medium, a format widely used on a PC, for example, a QuickTime file format or an AVI (Audio Video Interleave) file format is widely used. Thereby, the affinity between the video data and the PC (Personal Computer) is enhanced.
Regarding a method for managing content in an optical disc when such a PC file format is used, a technique disclosed in Japanese Patent Laid-Open Publication No. 2001-84705 (published on March 30, 2001) There is. Hereinafter, the outline will be described with reference to FIG.
The content files 301, 302, and 303 recorded on the disk 305 are files corresponding to each recorded scene or content, and are each one QuickTime file (hereinafter referred to as a QuickTime movie file).
The index file 300 is a file for storing table-of-contents information of data in the disk 305, and has an entry for each QuickTime movie file. Each entry stores the reduced image data 311, 312, and 313 of the representative screen of the corresponding scene and the file name of the file including the corresponding scene.
When the index screen is presented to the user, the video disc recorder displays reduced images 321 to 323 obtained by decoding the reduced image data 311 to 313 of each entry on the content selection screen 307. The user selects a file to be reproduced or edited from among the plurality of reduced images 321 to 323 displayed on the content selection screen 307.
For example, when the user selects the reduced image 323 and gives an instruction to play it, the video disc recorder acquires the file 303 that is the file name of the file containing the content corresponding to the reduced image 323 and starts playing the file 303. To do.
Further, the index file 300 includes, for all contents in the disc 305, pointers to files storing the contents and reduced image data. Therefore, the video disc recorder can display the content selection screen 307 only by reading the index file 300 from the disc 305. As a result, the technique of the above publication has the advantage that less time is required for displaying the index screen.
By the way, since the content selection screen 307 is frequently displayed, if the display time of the content selection screen 307 is reduced, the response speed of the video disc recorder experienced by the user (hereinafter referred to as a sensation response) is greatly improved.
Therefore, in the conventional video disc recorder, in order to improve the sensation response at the time of inserting the disc, additional information representing the contents of the content such as reduced images and shooting times corresponding to each content is stored in the index file, and the index file Only the reduced images and basic information are displayed in a list on the content selection screen 307.
However, additional information other than the information stored in the index file (hereinafter referred to as extended additional information) is included in the content file only from the list display of reduced images as in the content selection screen 307 in the prior art. Cannot judge whether or not. That is, there is a problem that even if there is no actual access to the content, it is impossible to confirm even the presence of the extended additional information.
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a data recording method, a data reproducing method, and a data recording that can more easily confirm the presence / absence of extended additional information in each content. An apparatus, a data reproducing device, a data recording medium, a program, and a recording medium storing the program are provided.

In order to achieve the above object, the data recording method of the present invention is a data recording method for recording index information of a plurality of contents including AV data on a recording medium. It includes identification information indicating whether or not extended additional information is added.
In order to achieve the above object, the data recording apparatus of the present invention is a data recording apparatus for recording index information of a plurality of contents including AV data on a recording medium. On the other hand, it includes identification information indicating whether or not extended additional information is added.
According to the above configuration, the index information includes identification information regarding whether or not the extended additional information is added to the content. Therefore, even if each content is not directly accessed, it is possible to grasp whether or not the extended additional information is added to each content based on the identification information by accessing only the index information. Note that the extended additional information refers to GPS (Global Positioning System) information, temperature, AV data recorded by the user, comments added by the user, AV data authors, performers, etc. This is information representing more specific contents.
Here, in the present invention, the time required for the process of accessing the index information and determining the presence / absence of the extended additional information for each content is the time required after the AV data or AV data of each content and management information are opened in the prior art. The time required for the process of determining whether or not the extended additional information is added to the content is shorter.
Therefore, the presence / absence of extended additional information in each content can be confirmed more easily.
In the data recording method of the present invention, in the above configuration, the extended additional information may be moving image thumbnail data.
According to the above configuration, since the index screen is displayed with still image thumbnails, the bodily sensation response of the video disc recorder does not deteriorate. In addition, it is possible to read moving image thumbnail data as extended additional information for only content for which it is determined that extended additional information exists based on the identification information, and switch the index screen from a still image thumbnail to a moving image thumbnail. In addition, according to the moving image thumbnail, the content can be confirmed more specifically than the still image thumbnail.
Therefore, the contents of a plurality of contents can be presented to the user in more detail without reducing the sensation response of the video disc recorder.
In the data recording method of the present invention, the extended additional information may be included in a predetermined area of each content in the above configuration.
According to the above configuration, even when a lot of extended additional information is added to the content, the content of the extended additional information can be grasped by referring to a predetermined area (User data atom) in each content. That is, in order to grasp the contents of the extended additional information, it is possible to omit time for searching where the extended additional information is stored.
Therefore, it is possible to quickly refer to more extended additional information without degrading the sensory response of the index display.
In the data recording method of the present invention, in the above configuration, the extended additional information may be recorded in an area different from an area of the recording medium for recording each content.
According to the above configuration, the extended additional information can be read from an area different from the area where the content is recorded on the recording medium. Therefore, only the extended additional information can be easily read.
In the data recording method of the present invention, in the above configuration, the identification information may be set for each type of the extended additional information.
According to the above configuration, the presence or absence of extended additional information in each content can be grasped for each type of extended additional information. Therefore, the presence / absence of the extended additional information can be confirmed in more detail.
In the data recording method of the present invention, in the above configuration, the identification information may include information on a device that can reproduce the extended additional information.
According to the above configuration, it is possible to grasp a device that can reproduce the extended additional information based on the identification information. Therefore, it is possible to determine whether or not the device that is currently reproducing the content is a device that can reproduce the extended additional information.
Therefore, for example, only when the device that is currently reproducing the content is a device that can reproduce the extended additional information, the presence / absence of the extended additional information is displayed on the index screen more efficiently. The presence or absence can be confirmed.
In addition to the above-described configuration, the data recording method of the present invention has a state in which the extended additional information is not added, and whether the additional additional information is added or is unknown. Information indicating either a certain state may be included.
According to the above configuration, it is possible to immediately grasp whether or not it is necessary to access the content in order to obtain the extended additional information based on the identification information. In addition, since it is not necessary to guarantee the existence state, the process of comparing the AV Index with the additional information of the content file at the time of recording / editing the additional information and checking whether the additional additional information is included in the content file is always performed. It does not have to be done.
Further, in order to achieve the above object, the data reproduction method of the present invention is a data reproduction method for reproducing index information of a plurality of contents including AV data, wherein the index information is added to each of the contents. It includes identification information indicating whether or not information is added, and controls the reading of the extended additional information based on the identification information.
In order to achieve the above object, the data reproducing apparatus of the present invention reproduces index information of a plurality of contents including AV data, and the index information is extended and added to each of the contents. Control information that includes identification information indicating whether or not information is added and controls reading of the extended additional information based on the identification information.
According to the above configuration, the index information includes identification information regarding whether or not the extended additional information is added to the content. Therefore, even if the AV data of each content is not directly accessed, it is possible to grasp whether or not the extended additional information is added to each content based on the identification information by accessing only the index information.
Therefore, the presence / absence of the extended additional information can be grasped more easily based on the identification information, and the extended additional information can be read out more quickly.
In the data reproduction method of the present invention, in the above configuration, after the index information is read out, the extended additional information may be read out before the user instructs to display the extended additional information.
That is, many users tend to determine whether or not extended additional information is added to each content after confirming the contents of a plurality of contents on the index screen.
According to the above configuration, after the index information is read out, the extended additional information is read in advance based on the identification information of each content before the user instructs the display of the extended additional information. Therefore, after the index screen is displayed, when the additional additional information is displayed according to the user's instruction, the extended additional information can be displayed quickly.
Further, in order to achieve the above object, the data reproduction method of the present invention is a data reproduction method for reproducing index information of a plurality of contents including AV data, wherein the index information is added to each of the contents. It includes identification information indicating whether information is added or not, and displays the identification information.
In order to achieve the above object, the data reproducing apparatus of the present invention reproduces index information of a plurality of contents including AV data, and the index information is extended and added to each of the contents. It includes identification information indicating whether or not information is added, and includes display means for displaying the identification information.
According to the above configuration, the index information includes identification information regarding whether or not the extended additional information is added to the content. Therefore, it is possible to grasp whether or not the extended additional information is added to each content based on the identification information by accessing only the index information without directly accessing each content.
Therefore, the displayed identification information allows the user to more easily recognize whether or not the extended additional information is added to the content.
Further, the data recording medium of the present invention is a data recording medium in which index information of a plurality of contents including AV data is recorded. The index information includes whether or not extended additional information is added to each content. Including identification information.
According to the above configuration, the index information recorded on the data recording medium includes identification information regarding whether or not the extended additional information is added to the content. Therefore, it is possible to grasp whether or not the extended additional information is added to each content based on the identification information by accessing only the index information of the data recording medium according to the present invention without directly accessing each content. .
Therefore, the presence / absence of extended additional information in each content can be confirmed more easily.
The program of the present invention is a program for causing a computer to execute the data recording method or the data reproducing method described above. Furthermore, the computer-readable recording medium of the present invention stores the above program.
Other objects, features, and advantages of the present invention will be fully understood from the following description. The benefits of the present invention will become apparent from the following description with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a video disc recorder according to an embodiment of the present invention.
FIG. 2A is a diagram illustrating the relationship between the management information of the QuickTime file format and the AV stream when the management information and the media data exist in the same file.
FIG. 2B is a diagram showing the relationship between the management information of the QuickTime file format and the AV stream when the management information and the media data exist in separate files.
FIG. 2C is a diagram showing the relationship between QuickTime file format management information and AV streams when externally referring to a plurality of AV stream files.
FIG. 3 is a diagram showing an overview of Movie atom in the QuickTime file format.
FIG. 4 is a diagram showing an outline of Track atom in the QuickTime file format.
FIG. 5 is a diagram showing the configuration of the Track header atom in the QuickTime file format.
FIG. 6 is a diagram showing the configuration of Media atom in the QuickTime file format.
FIG. 7 is a diagram showing the configuration of the media information atom in the QuickTime file format.
FIG. 8 is a diagram illustrating an example of data management by the sample table atom.
FIG. 9 is a diagram illustrating a configuration of a sample table atom in the QuickTime file format.
FIG. 10 is a diagram showing the configuration of Edit atom in the QuickTime file format.
FIG. 11A is a diagram showing an example of the reproduction range designation by Edit atom.
FIG. 11B is a diagram illustrating an example of the configuration of a sample.
FIG. 11C is a diagram showing an example of the actual sample playback order.
FIG. 12 is a diagram showing the configuration of User data atom in the QuickTime file format.
FIG. 13 is a diagram illustrating the types of User data types in the QuickTime file format.
FIG. 14 is a diagram showing a configuration of an AV stream in each embodiment of the present invention.
FIG. 15 is a diagram showing the configuration of the VU in each embodiment of the present invention.
FIG. 16 is a diagram showing an AV stream management form using QuickTime in each embodiment of the present invention.
FIG. 17A shows a directory structure of a file.
FIG. 17B is a diagram showing an example in which the directory / file structure shown in FIG.
FIG. 18 is a diagram showing the structure of an AV Index file in the first embodiment of the present invention.
FIG. 19 is a diagram showing a configuration of attribute information in the first embodiment of the present invention.
FIG. 20 is a diagram showing a configuration of flags in the first embodiment of the present invention.
FIG. 21 is a flowchart showing the overall processing flow in the first embodiment of the present invention.
FIG. 22 is a flowchart showing the flow of various processes according to user instructions in the first embodiment of the present invention.
FIG. 23A shows a directory structure of files recorded on the optical disc.
FIG. 23B is a diagram illustrating an example of a recording state on the recording medium.
FIG. 24 is a diagram showing an example of an AV Index management table immediately after a disc is inserted in the first embodiment of the present invention.
FIG. 25 is a diagram showing an example of an AV Index management table immediately after recording in the first embodiment of the present invention.
FIG. 26 is a flowchart showing additional information change processing in the first embodiment of the present invention.
FIG. 27 is a flowchart showing AV index file update processing according to the first embodiment of the present invention.
FIG. 28 is a flowchart showing AV Index file read processing according to the first embodiment of the present invention.
FIG. 29 is a diagram showing an example of an index display screen in the first embodiment of the present invention.
FIG. 30 is a diagram illustrating an example of the extended additional information display screen according to the first embodiment of the present invention.
FIG. 31 is a diagram showing a second configuration of the flag in the first embodiment of the present invention.
FIG. 32 is a diagram illustrating an example of a second index display screen according to the first embodiment of the present invention.
FIG. 33 is a diagram showing a configuration of a flag in the second embodiment of the present invention.
FIG. 34 is a diagram showing the configuration of a flag in the third embodiment of the present invention.
FIG. 35 is a diagram showing a flag changing condition for presence / absence of extended additional information in the third embodiment of the present invention.
FIG. 36 is a diagram showing an index file in the prior art.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited at all by these.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, after describing the configuration of a video disc recorder that is commonly used in a plurality of embodiments of the present invention, characteristic points unique to each embodiment will be described.
[About the configuration of the video disc recorder]
As shown in FIG. 1, the video disc recorder includes a host CPU (Central Processing Unit) 1, a RAM (Random Access Memory) 2, a ROM (Read Only Memory) 3, a user interface 4, a system, and a system. A clock 5, an optical disc 6, a pickup 7, an ECC (Error Correcting Coding) decoder 8, an ECC encoder 9, a reproduction buffer 10, a recording / post-recording buffer 11, a demultiplexer 12, a multiplexer 13, A multiplexing buffer 14, an audio decoder 15, a video decoder 16, an audio encoder 17, and a video encoder 18 are provided. Furthermore, the video disk recorder includes a camera, a microphone, a speaker, a display (display means), or the like (not shown).
The host CPU 1 controls the pickup 7, the demultiplexer 12, the multiplexer 13, the audio decoder 15, the video decoder 16, the audio encoder 17, and the video encoder 18 through the bus 19.
Further, the host CPU 1 distributes the data in the reproduction buffer 10 to the decoder corresponding to the data type in accordance with the data transmission request from the audio decoder 15 and the video decoder 16 based on the management information regarding the data being reproduced. An instruction is given to the demultiplexer 12.
With the configuration described above, the video disk recorder reads data stored in the optical disk 6 from the optical disk 6 through the pickup 7 when the optical disk 6 is reproduced, and corrects the read data by the ECC decoder 8 and then reproduces the reproduction buffer 10. Save once.
On the other hand, the video disk recorder uses the audio encoder 17 and the video encoder 18 to compress and encode data to be recorded on the optical disk 6 and multiplex the compressed and encoded data at the time of recording on the optical disk 6. Once transmitted to the buffer 14. Thereafter, the video disk recorder AV-multiplexes the data transmitted to the multiplexing buffer 14 using the multiplexer 13 and then transmits it to the recording / after-recording buffer 11. The video disk recorder records the data in the recording / after-recording buffer 11 on the optical disk 6 through the pickup 7 after adding an error correction code using the ECC encoder 9.
Note that MPEG-1 Layer-II was used as an encoding method for audio data, and MPEG-2 was used as an encoding method for video data. In these encoding methods, 2048 bytes are set as one sector, and an ECC block for error correction is configured by 16 sectors.
[File format]
The QuickTime file format used as a format for AV stream management in the present invention will be described. The QuickTime file format is a multimedia data management format developed by Apple, and is widely used in the PC world.
The QuickTime file format includes video data, audio data, etc. (these are also collectively referred to as media data) and management information. A combination of media data and management information is called a QuickTime movie. In addition, the QuickTime movie may be simply called a movie. Note that the media data and the management information may exist in the same file or in separate files.
When the media data and the management information exist in the same file, the QuickTime movie has a configuration as shown in FIG. That is, various information in the QuickTime movie is stored in a common structure called atom in the file 21. For example, management information in a QuickTime movie is stored in a structure called Movie atom, while media data is stored in a structure called Movie data atom. In FIG. 2A, “AH” is an abbreviation for “Atom Header”.
The management information in the Movie atom includes a table for deriving a relative position in the file of media data corresponding to an arbitrary time in the media data, attribute information of the media data, external reference information described later, etc. It is included.
On the other hand, when the management information and the media data are stored in separate files, the QuickTime movie has a configuration as shown in FIG. That is, the management information is stored in the structure called Movie atom in the file 22, but the media data need not be stored in the atom. That is, the media data is stored as an AV stream in a file 23 different from the file 22.
Thus, when management information and media data are stored in separate files, Movie atom is said to “externally reference” the file storing the media data.
External reference can be made to a plurality of AV stream files 25 and 26 as shown in FIG. This enables so-called “non-linear editing” or “non-destructive editing” that makes it appear as if the editing has been performed without physically moving the AV stream itself.
Next, the format of management information in a QuickTime movie will be described with reference to FIGS.
First, atom, which is a common information storage format, will be described.
At the beginning of an atom, there is always an Atom size indicating the size of the atom and a Type indicating the type information of the atom. Type is distinguished by four characters, for example, “moov” in Movie atom and “mdat” in Movie data atom. In this way, the atom size and type at the beginning of the atom are called atom headers.
Also, an atom can include another atom. That is, there is a hierarchical structure between atoms.
The structure of Movie atom as an example of atom is shown in FIG. As shown in FIG. 3, Movie atom includes Movie header atom, Track atom, and User data atom.
Movie header atom is an atom that manages the overall attributes of the movie managed by Movie atom. Track atom is an atom that stores information related to tracks such as video and audio included in a movie. The User data atom is an atom that can be uniquely defined by the manufacturer.
The structure of the Track atom is shown in FIG. As shown in FIG. 4, the Track atom includes a Track header atom, an Edit atom, a Track reference atom, and a Media atom.
The Track header atom is an atom that manages the overall attribute of the track. Edit atom is an atom that manages the timing to be reproduced in the movie for each section of the media data. The Track reference atom is an atom that manages the relationship with other tracks. Media atom manages data (media data) related to media such as video and audio.
The structure of the Track header atom is shown in FIG. Note that only the main configuration of the Track header atom will be described. As shown in FIG. 5, the Track header atom includes Flags and Layer.
Flags is a set of flags indicating track attributes. A typical flag can be a Track enabled flag. If the Track enabled flag is 1, the track is played back. If the Track enabled flag is 0, the track is not played back.
Layer represents the spatial priority of the track. For example, when there are a plurality of tracks for displaying an image, the corresponding image is displayed in front of the track having a smaller Layer value.
The configuration of the Media atom is shown in FIG. As shown in FIG. 6, the Media atom includes a Media header atom, a Handler reference atom, and a Media information atom.
The media header atom manages overall attributes and the like related to media data managed by the media atom. The Handler reference atom stores information indicating which decoder decodes the media data. The media information atom manages attribute information unique to media such as video and audio.
The configuration of the media information atom is shown in FIG. As shown in FIG. 7, the media information atom includes a media information header atom, a handler reference atom, a data information atom, and a sample table atom.
The media information header atom manages attribute information unique to media such as video and audio. The Handler reference atom stores information indicating which decoder decodes the media data as described in the description of the Media atom. Data information atom includes Data reference atom which is an atom for managing the name of a file including media data referred to by the QuickTime movie. Sample table atom manages data size, reproduction time, and the like.
By the way, in the QuickTime format, an area in which samples belonging to the same track are continuously arranged in a file in the order of reproduction time is called a chunk. Chunks are numbered from 1 in the order of playback time, and the addresses from the beginning of each chunk file can be grasped by this number.
In the QuickTime format, the minimum unit of data (for example, a video frame) is called a sample. Furthermore, in the QuickTime format, the number of samples is managed by assigning numbers (sample numbers) from 1 to the samples of each track in order of playback time.
Further, in the QuickTime format, the playback time length and data size (sample size) of each sample are managed.
That is, as shown in FIG. 8, the chunks included in the file 31 are numbered from 1 in order of playback time. Further, for example, the m-th chunk includes a plurality of Samples having sample numbers j to i.
As described above, in the QuickTime format, the address of each chunk from the file head and the number of samples included in each chunk are managed. Based on such information, in the QuickTime format, the position of a sample corresponding to an arbitrary time can be obtained.
Next, the configuration of the Sample Table atom will be described. As shown in FIG. 9, Sample Table atom includes Sample description atom, Time-to-sample atom, Sync sample atom, Sample-to-chunk atom, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size, Sample size. Yes.
The sample description atom manages the data format (Data format) of each chunk, the index of the chunk of the file in which the sample is stored, and the like. Time-to-sample atom manages the playback time of each sample.
The Sync sample atom is used to manage samples that can be decoded from among individual samples. Sample-to-chunk atom manages the number of samples included in each chunk. Sample size atom manages the size of each sample. Chunk offset atom manages the address of each chunk from the beginning of the file.
The Edit atom includes one Edit list atom, as shown in FIG. The Edit list atom has a set of values of Track duration, Media time, and Media rate (hereinafter, this set is referred to as an entry) for the number specified by Number of entries. Each entry corresponds to a section that is continuously played back on the track, and is arranged in the order of playback time on the track.
Track duration represents the playback time on the track in the section managed by the entry, Media time represents the position on the media data corresponding to the head of the section managed by the entry, and Media rate is managed by the entry. Indicates the playback speed of the section. When the media time is −1, playback of the sample on the track is stopped for the track duration of the entry. A section in which reproduction is stopped in this way is called empty edit.
Next, how the sample is actually reproduced will be described. In explaining the reproduction of the sample, as shown in FIG. 11A, the contents of the Edit list atom are as follows: Track duration (D (i)), Media time (T (i)), i-th entry, Assume that Media rate (R (i)) is assigned. Also, as shown in FIG. 11B, the sample configuration is such that sample # 1 exists at the position of Media time = 0 and sample # m + 2 exists at the position of Media time = 20000. At this time, the actual sample reproduction is performed in the order shown in FIG. 11C as described below.
First, as shown in FIG. 11A, the entry # 1 has a track duration of 13000, a media time of 20000, and a media rate of 1. Therefore, as shown in FIG. 11 (c), in the section from 13000 to the beginning of the track, the section from time 20000 to 33000 in the sample is reproduced.
Next, in entry # 2, as shown in FIG. 11A, Track duration is 5000 and Media time is -1. Accordingly, as shown in FIG. 11 (c), nothing is reproduced during the section from time 13000 to 18000 in the track.
Finally, as shown in FIG. 11A, entry # 3 has a track duration of 10000, a media time of 0, and a media rate of 1. Therefore, as shown in FIG. 11C, in the section from time 18000 to 28000 in the track, the section from time 0 to 10000 in the sample is reproduced.
Next, the configuration of the User data atom will be described with reference to FIG. The User data atom can store an arbitrary number of unique extended additional information that is not defined in the QuickTime format. One unique extension additional information is managed by one entry, and one entry is composed of Size, Type, and User data.
“Size” represents the size of the entry itself, “Type” represents identification information for distinguishing unique information, and “User data” represents actual data.
FIG. 13 shows an example of the type of User data. For the type of User data that starts with a Marcy mark, this indicates that the data is text information.
[About AV stream format]
The configuration of an AV stream commonly used in the present invention will be described with reference to FIGS.
As shown in FIG. 14, the AV stream is composed of an integer number of continuous units (CUs). A CU is a unit of data continuously recorded on a disc. Further, the length of the CU is set so that seamless reproduction and real-time after-recording are guaranteed, regardless of how the CUs constituting the AV stream are arranged on the disc.
Note that seamless playback refers to playback without interrupting images and sound during playback. Real-time after-recording refers to recording audio while seamlessly playing the target video.
Further, as shown in FIG. 14, the CU includes an integer number of Video Units (VU). The VU is a unit of data that can be reproduced independently, and can be an entry point at the time of reproduction.
As shown in FIG. 15, the VU is an integer number of GOPs (Group Of Pictures) storing video data of about 1 second and an integer number of AAUs (Audio) storing main audio data reproduced at the same time. (Access Unit).
The GOP is a unit of image compression in the MPEG-2 video standard, and is composed of a plurality of video frames (typically about 15 frames). AAU is a unit of audio compression in the MPEG-1 Layer-II standard and is composed of 1152 sound wave sample points. When the sampling frequency is 48 kHz, for example, the reproduction time per AAU is 0.024 seconds.
In the VU, AAU and GOP are arranged in this order in order to reduce the delay required for AV synchronized playback.
In addition, in order to enable independent reproduction in units of VU, a sequence header (SH) is placed at the head of video data in the VU. The playback time of VU is defined as the number of video frames included in VU multiplied by the video frame period.
[AV stream management method]
An AV stream management method according to the present invention will be described with reference to FIG. The AV stream management method is based on the QuickTime file format, and manages video data and audio data by a video track and an audio track, respectively.
That is, as shown in FIG. 16, the video track manages GOP as one sample and the video chunk in the VU as one chunk. On the other hand, the main audio track manages AAU as one sample and the audio block in the VU as one chunk.
[File system]
UDF (Universal Disk Format), which is a file system format used in the description of the present invention, will be described with reference to FIG.
FIG. 17A shows the directory structure of the files 40, 41, and 42. FIG. 17B shows an example in which the directory / file structure shown in FIG. 17A is recorded in UDF.
In FIG. 17B, AVDP indicated by reference numeral 44 is an abbreviation for Anchor Volume Descriptor Pointer. The AVDP 44 corresponds to an entry point for searching for UDF management information, and is normally recorded in the 256th sector, the Nth sector, or the N-256th sector. N is the maximum logical sector number.
The VDS indicated by reference numeral 43 is an abbreviation for Volume Descriptor Sequence. The VDS 43 records management information related to a volume that is an area managed by the UDF. A volume generally exists on one disk, and generally contains one partition.
The FSD indicated by reference numeral 45 is an abbreviation for File Set Descriptor. One FSD 45 exists in the partition. The position information in the partition is indicated by a logical block number corresponding to the sector number from the head of the partition. One logical block corresponds to one sector.
Further, the FSD 45 includes position information of the FE 46 that is a File Entry (FE) of the root directory (consisting of a logical block number and a logical block number and called “extent”).
FE manages a set of extents. By rewriting, adding, or deleting the extent, it is possible to change the order of the actual data constituting the file, and to insert or delete the data.
The FE 46 manages an area 47 that stores a set of FIDs (File Identifier Descriptors) that store files and directory names directly under the root directory.
The FID 53 and FID 54 in the area 47 include the file names of the files 41 and 42 and the position information of the FE 48 and FE 50 that manage the set of extents, respectively.
The FE 48 manages an area 49 and an area 52 which are areas constituting actual data of the file 41 as extents. At this time, in order to access the actual data of the file 41, the links may be followed in the order of AVDP 44, VDS 43, FSD 45, FE 46, FID 53, FE 48, area 49, and area 52.
[First Embodiment]
A first embodiment of the present invention will be described with reference to FIGS. In describing the first embodiment, items (1. management information format), (2. overall flow), (3. recording process), (4. additional information change process), (5. AV Index file recording process), (6. Index file screen display process), and (7. Change mode) are provided, and these items will be described in order.
(1. Management information format)
First, in describing the first embodiment of the present invention, the format of management information will be described. As described above, in order to manage the QuickTime movie included in the disc, various files including contents such as still image data and management information (hereinafter referred to as content files), a special AV index file (index information) is used. Place a QuickTime movie file on the disc.
FIG. 18 shows the configuration of the AV Index file in the present embodiment. The AV Index file is composed of Movie atom 60 which is management information and Movie data atom 61 of the data itself, in the same way as a normal QuickTime movie file. The AV Index file manages a plurality of entries, and each content file in the disc is managed by one entry.
Movie atom 60 is a Property track 62 for managing attribute information of each entry, Title track 63 for managing title character string data of each entry, Thumbnail track 64 for managing representative image data of each entry, and It is composed of a total of four types of tracks of Intro music track 65 for managing representative audio data.
The attribute information, title character string data, representative image data, and representative audio data relating to each entry are managed as track samples indicated by reference numerals 62 to 65, respectively.
For example, the attribute information related to the content file 66 is the sample 67 on the property track 62, the title character string data is the sample 68 on the title track 63, the representative image data is the sample 69 on the Thumbnail track 64, and the representative audio data is the sample 70 on the intro track 65. Manage with.
The attribute information regarding the content file 71 is the sample 72 on the property track 62, the title character string data is the sample 73 on the title track 63, the representative image data is the sample 74 on the Thumbnail track 64, and the representative audio data is the sample 75 on the intro track 65. Manage with.
Similarly, information about the content file 76 is managed by samples 77 to 80, information about the content file 81 is managed by samples 82 to 85, and information about the content file 86 is managed by samples 87 to 90.
The association between samples is performed based on the reproduction start time of each sample. That is, it is determined that samples located at the same time between tracks correspond to the same entry.
The Movie data atom 61 stores attribute information on each content file, title character string data, representative image data, and representative audio data.
As shown in FIG. 19, the attribute information includes version, flags, entry-number, creation-time, modification-time, duration, and file-identifier.
version indicates the version of the file format. “flags” is a collection of various flags. The entry-number stores the ID of the entry corresponding to the attribute information. creation-time represents the date and time when the entry corresponding to the attribute information was created. The modification-time represents the date and time when the entry corresponding to the attribute information is modified. duration represents the playback time of the entry corresponding to the attribute information. The file-identifier stores the file name of the file when the entry corresponding to the management information corresponds to the file.
As shown in FIG. 20, the flags include a Status of Entry and an Existence status of extended information.
Status of Entry is a flag for identifying whether the corresponding entry is valid or invalid. Existence status of extended information indicates whether the corresponding entry has extended additional information (Thecorresponding AV File has extended information) or does not have (Thecorresponding AV file information flag) Identification information).
Other data stored in the Movie data atom 61 will be described. The representative image data is JPEG compressed data reduced to 160 × 120 pixels, the title character string data is text data, and the representative audio data is MPEG-1 Audio Layer-II compressed data.
(2. Overall flow)
Next, FIG. 21 shows a flow from disk insertion to disk ejection or power-off in this embodiment.
When the optical disk 6 is inserted, the file system management information is first read in accordance with the above-described sequence (step 1). In the following description, the step is simply described as “S”.
Next, the AV Index file is read from the optical disc 6 and an index screen is displayed (S2). Thereafter, it is checked whether or not it is time to record the AV Index file on the disc (S3).
Note that the recording timing is a timing required to temporarily record information on the AV Index file on the RAM 2 on the optical disc 6 in order to read out information from the optical disc 6 on the disc eject instruction, power off, or new information to the RAM 2. It is.
If it is determined in S3 that the current recording timing is reached, AV Index recording processing is performed in S4. Thereafter, file / directory information is recorded (S5). Next, it is checked whether or not the trigger for performing AV Index recording is power off or disc ejection (S6).
On the other hand, if it is determined in S3 that the current recording timing is not reached, it is checked whether there is an instruction from the user (S7). When it is determined in S7 that there is an instruction from the user, various processes to be described later are executed in accordance with the instruction from the user (S8), and when the various processes are completed, the process result is reflected to update the index screen display process. Is executed (S18).
Next, various processes in S8 will be described with reference to FIG.
First, it is checked whether or not the instruction from the user is a recording (S9), and if it is a recording, a recording process to be described later is performed (S10). If the instruction is not recording, it is checked whether or not the instruction is to delete an entry, that is, to delete an existing content file (S11). If the entry is to be deleted, an entry deletion process (S12) is executed.
Next, if the instruction is neither recording nor entry deletion, it is checked whether the instruction is a change of additional information related to an existing entry (S13). If so, an additional information change process (S14) described later is executed.
If the instruction is not an additional information change, it is next checked whether or not any of the representative image data, title character string data, representative audio data, and attribute information related to the existing entry is changed (S15). The attribute information changing process (S16) is executed. If the instructed is not the attribute information etc. changing process, the other process (S17) is executed.
Next, details of the contents of various processes will be described. Note that the entry deletion process and the attribute information change process are not related to the contents of the present invention, and thus the description thereof is omitted.
Here, as an initial state before the processing is started, files are recorded on the optical disc 6 in a directory structure as shown in FIG. 23A, and the files are arranged on the optical disc 6 as shown in FIG. 23B. Assuming that
That is, the content file SHRP0001. MOV, SHRP0002. MOV and SHRP0003. The MOV is recorded at the positions of the AV file 91a, the AV file 91b, and the AV file 91c, respectively.
In addition, AVIF0000. The MOV is recorded in the area of the AV index file 92 in FIG. 23B, and the movie atom of the AV index file is recorded in the area 93 at the head of the area of the AV index file 92.
In addition, SHRP0001. MOV attribute information, title character string data, and representative image data are recorded in area 94a, area 95a, and area 96a, respectively. MOV attribute information, title character string data, and representative image data are recorded in area 94b, area 95b, and area 96b, respectively, and SHRP0003. It is assumed that MOV attribute information, title character string data, and representative image data are recorded in an area 94c, an area 95c, and an area 96c, respectively.
As a result of performing an index screen display process to be described later, a table for managing information related to the AV Index file is configured in the RAM 2 as shown in FIG. Hereinafter, this table is referred to as an AV Index management table.
Each row of the AV index management table manages the state of the AV index read when the disc is inserted and the subsequent update of each entry. Each row of the AV Index management table includes information on attributes including a flag (identification information) indicating the presence / absence of extended additional information, the name of a content file managed by each entry, and a representative image held in another area of the RAM 2. Contains pointer information to data.
The representative audio data and title character string data are not shown for the sake of simplicity, but are handled in the same manner as the representative image data and attribute information, respectively. The name of each file is actually managed by the full path from the root directory, but for simplicity, the directory name is omitted here.
(3. Recording process)
Processing during recording in the present embodiment will be described. When recording is instructed by the user, first, the audio encoder 17 and the video encoder 18 are activated, and encoding of input data from a camera and a microphone (not shown) is started by the above-described encoding method.
The encoded audio data and video data are multiplexed by the multiplexer 13 according to the AV stream format described above. At this time, the GOP size and playback time, etc., which will be required later for recording Movie atom, are stored in the RAM 2.
Further, the GPS position information obtained at the time of recording is also held in the RAM 2. In addition, the head image is extracted and reduced from the input video as a representative image, is encoded by JPEG encoding, representative image data is generated, and is stored in the RAM 2. Further, the AV stream as a multiplexing result is recorded on the optical disc 6 by the pickup 7 via the recording / post-recording buffer 11 and the ECC encoder 9.
When a recording stop is instructed by the user and the AV stream remaining in the recording / after-recording buffer 11 is recorded on the optical disc 6, the user data type is set to “Gbps” in the user data atom in the Movie atom and stored in the RAM 2. The GPS position information that is present is stored in user data. Finally, the Movie atom is recorded.
When the recording is completed, a line indicated by line number 3 is added to the AV Index management table on the RAM 2 as shown in FIG. Hereinafter, the contents of the line will be described.
As shown in FIG. 25, in the attribute information, the entry-number stores a number that does not overlap with an existing number. Also, when there is extended additional information at the time of recording, the Existence status of extended information flag is set to “1”.
Regarding the content file name, a file name in which the number part from the fifth digit to the eighth digit of the existing content file name in the AV Index management table is not duplicated in the file system is generated and stored. As for representative image data, the address on the RAM 2 of the above-described representative image data generated at the time of recording is stored.
(4. Additional information change process)
Next, a case where additional information is added to, changed, or deleted from the already recorded content will be described with reference to FIG. As additional information to be added to the already recorded content, there are information on a content that can be freely edited by the user, information on the author, performer, and the like.
When a change in additional information is instructed by the user, a movie atom of a content file including the designated content is opened, and a user data atom is read. Next, it is checked whether or not an extended additional information entry of the type designated by the user already exists, that is, whether or not additional information is additionally written (S1401).
When a type that does not exist is designated, that is, in the case of additional writing (YES in S1401), a new entry is created (S1402) and information is recorded (S1403).
Next, the property information of the AV Index file is checked to check the existence status of extended information flag (extended additional information presence / absence flag) (S1404). If the Existence status of extended information flag is '1' (extended additional information is present) (NO in S1404), the Existence status of extended information flag remains at '1' and no change is made.
On the other hand, if the existence status of extended information flag is '0' (extended additional information does not exist) (YES in S1404), the additional information of the entry corresponding to the content of the AV Index file is examined (S1405). If there is no additional information that is the same as the additional information, that is, only additional information of a different type exists (YES in S1405), the extent status of extended information flag is rewritten to “1” (extended additional information exists). (S1406). If the same additional information as that already added exists (NO in S1405), the Existence status of extended information flag remains “0” and no change is made.
In S1401, if a type that already exists is designated, that is, if it is not an additional writing (NO in S1401), it is checked whether or not the instruction from the user is a change of additional information (S1407).
When the additional information is changed (YES in S1407), the change information is overwritten on the user data and the process ends (S1408).
When the additional information is not changed (NO in S1407), it is checked whether or not the instruction from the user is deletion of the additional information (S1409). If deletion of additional information that already exists from the content file is instructed (YES in S1409), the additional information is deleted (S1410). Next, it is checked whether the Existence status of extended information flag is “1” (S1411).
If the Existence status of extended information flag is '1' (YES in S1411), it is checked whether additional information of other types remaining in the content file is also present in the entry corresponding to the content of the AV Index file. (S1412). When all the other additional information is included in the entry corresponding to the content of the AV Index file, that is, the additional information of a type different from the additional information included in the entry corresponding to the content of the AV Index file is included in the content file. If it does not exist (NO in S1412), the Existence status of extended information flag is rewritten to “0” (S1413). On the other hand, when all the other additional information is not included in the entry corresponding to the content of the AV Index file (YES in S1412), the change is not made as “1”.
Further, even when no additional information exists in the content file due to deletion of the additional information, the flag is rewritten to “0”.
Furthermore, the additional information may be added to the AV file at the same time that the additional information is added to the content file. In this case, the extension status of extended information flag is not rewritten.
(5. AV Index file recording process)
Next, AV Index file recording processing will be described with reference to FIG. First, as shown in FIG. 27, the construction of the sample table of the AV index file is performed on the RAM 2 (S20). Next, a Movie atom of the AV Index file is recorded (S21), attribute information and title character strings of all entries in the AV Index management table are recorded (S22), and finally, representative image data and representative audio data are recorded. (S23).
(6. Index file screen display processing)
The index file screen display process in this embodiment will be described with reference to FIG. First, the AV Index file is opened (S30), Movie atom is read, and the above AV Index management table is created on the RAM 2 (S31). However, at this time, only position information of various data such as representative image data has been acquired, and various data has not yet been read onto the RAM 2.
Next, the title character string data and attribute information of each entry are read and stored in the AV Index management table (S32). Thereafter, it is determined whether or not there is a valid thumbnail in the currently open AV Index file (S33). If there is a valid thumbnail, the thumbnail is read (S34), and the representative image data is used as an index file screen. Display or play representative audio data.
FIG. 29 shows a screen image of the AV index displayed in this way. As shown in FIG. 29, as the user moves the thumbnail selection frame from one to the next, the attribute information (shooting date and time, playback time, etc.) of the content file including the selected content, title, and the title are displayed at the bottom of the screen. Is displayed.
In addition, when the extended additional information presence / absence flag (Existence Status of Extended Information) of the attribute information is “1”, an icon indicating that the additional additional information exists or the additional additional information is displayed in this portion. Display the button.
A process for displaying the extended additional information will be described. When the user gives an instruction to display the extended additional information while the index screen is displayed, the content file corresponding to the AV Index entry is opened, and the user data atom in the Movie atom is read, and the extended addition is performed as shown in FIG. Displays the type and content of information. When there is no playback instruction and the “Return to index screen” button is selected, or when the “Next” or “Previous” button is selected, the extended additional information display of another content file is instructed. In the case, the content file currently displaying the extended additional information is closed.
In this way, by displaying the information related to the extended additional information of the content while the index screen is displayed, it is possible to know the presence or absence of the extended additional information on the index display screen without accessing the content file containing the content, and search for the desired video It will be even easier to use.
Further, since the extended additional information is stored in the content file, even when there is a lot of extended additional information, more information can be quickly viewed without deteriorating the index display experience response. Moreover, management is facilitated by storing extended additional information such as GPS position information in a content file containing content.
(7. About changes)
In this embodiment, the extension additional information is read after the user instructs display of the extension additional information, but the present invention is not limited to this.
For example, the extended additional information about the content file for which the flag indicating whether or not the extended additional information is set may be read out to the RAM 2 during the idle time from when the index screen display is completed to when the user actually instructs.
Thereby, it is possible to shorten the response from when the user gives an instruction until the extended additional information is actually displayed without increasing the time required for displaying the index screen. Also, with regard to the order of reading the extended additional information, the extended additional information can be displayed more efficiently by preferentially reading the content file containing the content currently displayed on the index screen.
Further, when a flash memory is used as a recording medium, the access time is shorter than that of an optical disc, so that a flag indicating whether or not there is additional additional information is set at the same time that the basic information contained in the AV Index file is read to the RAM 2. The extended additional information may be read for the content file.
In this case, since the extended additional information of all contents is held on the RAM 2, for example, the contents can be displayed in groups. That is, according to the present invention, the extended additional information can be optimally read according to the characteristics of the recording medium.
In the present embodiment, one flag (identification information) indicating the presence / absence of extended additional information is prepared, but a flag may be prepared for each type of extended additional information.
That is, as shown in FIG. 31, a flag is provided for each extended additional information corresponding to the device, and “1” is set if there is information, and “0” is set if there is no information. Further, as shown in FIG. 32, an icon corresponding to each extended additional information is prepared on the index display screen, and an icon corresponding to the extended additional information whose flag is “1” is displayed.
Thereby, the user can confirm at a glance what kind of extended additional information the content file including the content selected on the index display screen has. Furthermore, for example, by extracting only the content having comment information and reading only the comment information of the content file containing the content into the RAM 2 first, the comment can be displayed in a telop when selected on the index display screen. become.
Further, information related to a device that can reproduce the extended additional information, for example, a manufacturer ID, may be added to the property information of the AV index. As a result, manufacturer-specific information can be included in the extended additional information, and the original extended additional information is read only when the manufacturer ID of the playback device matches the manufacturer ID of the property information, and is read out and displayed on the index screen. Can be controlled.
In this embodiment, the extended additional information is stored in the content file, but the present invention is not limited to this. For example, a content file for storing content is SHRP0001. When MOV is set, the extended additional information corresponding to the MOV is SHRP0001. Not MOV but SHRP0001. You may store in EXT.
In this case, the file name of the file including the extended additional information can be specified by changing the extension of the file name of the content file storing the content to “EXT”. By storing the extended additional information in a file separate from the content, only the extended additional information can be easily extracted.
In this embodiment, the GPS position information is used as the extended additional information. However, the present invention is not limited to this, and for example, the moving image thumbnail, temperature, humidity, weather, and the like described in the second embodiment. Needless to say, various information such as a photographer name and an editor name are targeted.
[Second Embodiment]
A second embodiment of the present invention will be described. The difference from the first embodiment is that, in the second embodiment, a flag indicating the presence / absence of a moving image thumbnail is provided in the attribute information of AV Index. Since the moving image thumbnail is large, it is not stored in the AV Index file but is stored in the content file.
Therefore, in the second embodiment, by reading the video thumbnail only for the content file including the content flagged during the index display, the overall index display experience response is not reduced. It is possible to switch from still image thumbnails to moving image thumbnails one after another.
Since the configuration of the second embodiment has many parts in common with the configuration of the first embodiment, the second embodiment is limited to the differences between the second embodiment and the first embodiment. The form will be described.
(1. Management information format)
As shown in FIG. 33, the configuration of the AV Index file in the present embodiment is the same as that in the first embodiment except that the attribute information flag includes an Extension status of movie thumbnail flag indicating the presence or absence of a moving image thumbnail. It is. It should be noted that when the status status of movie thumbnail flag is “0”, it indicates that there is no moving image thumbnail, and when it is “1”, it indicates that there is a moving image thumbnail.
(2. Overall flow)
Since the overall flow in this embodiment is the same as that in the first embodiment, the description thereof is omitted.
(3. Recording process)
In the present embodiment, when the AV stream remaining in the recording / after-recording buffer 11 is recorded on the optical disc 6, the first few seconds of the AV stream are compressed with Motion JPEG, and the content is separated from the AV stream main body as a moving image thumbnail. Store in a file. When a moving image thumbnail is recorded, a moving image thumbnail flag (Existence status of movie thumbnail) in the attribute information of AV Index is set to “1”. Other processes are the same as those in the first embodiment.
(4. Additional information change process)
Since the additional information change process in the present embodiment is the same as that in the first embodiment, the description thereof is omitted.
(5. AV Index recording process)
The AV index recording process in this embodiment is the same as that in the first embodiment, and a description thereof will be omitted.
(6. Index file screen display processing)
The index file screen display process of this embodiment is the same as that of the first embodiment except for the portion related to the display of the moving image thumbnail. Therefore, a process for displaying a moving image thumbnail in the present embodiment will be described.
In the present embodiment, after the index display related to basic information such as representative image data of the AV Index file is finished, for the AV Index file in which the video thumbnail presence flag (Existence status of movie thumbnail) is “1” in the attribute information, Open the content file corresponding to the order. Then, the moving image thumbnail data is read and replaced with a thumbnail based on the representative image data, and the moving image thumbnail is displayed on the index display screen.
As a result, it is possible to switch from still image thumbnails to moving image thumbnails one after another without reducing the overall index display bodily response.
[Third Embodiment]
Next, a third embodiment of the present invention will be described. In the present embodiment, the flag “Existence status of extended information” indicating the presence / absence of extended additional information is either a state in which no extended additional information is present in the content file, or a state in which the extended additional information is present or not present Is shown. Since there is no need to guarantee that the file exists, the AV index and the additional information of the content file are always compared during recording / editing of the additional information, and the process of checking whether the additional additional information is included in the content file is not performed. There may be equipment.
Since the configuration of the third embodiment has many parts in common with the first embodiment, only the differences will be described.
(1. Management information format)
As shown in FIG. 34, the configuration of the AV Index file in the present embodiment is the same as that in the first embodiment except that the meaning indicated by “Existence status of extended information” is different from that in the first embodiment. In this embodiment, when the extension status of extended information is “0”, it indicates that the corresponding additional content file exists or does not know whether it exists, and when it is “1”, it corresponds. The extended additional information does not exist in the content file to be displayed.
(2. Overall flow)
Since the overall flow in this embodiment is the same as that in the first embodiment, the description thereof is omitted.
(3. Recording process)
When the AV Index management table on the RAM 2 is updated when recording is completed, if there is extended additional information for the content file at the time of recording, the extension status of extended information flag is set to '0', and the extended additional information is set to “0”. If there is not, record “Existence status of extended information flag” as “1”.
Since processing other than the above is the same as in the first embodiment, a description thereof will be omitted.
(4. Additional information change process)
Next, a process at the time of changing additional information in the present embodiment will be described. The recording of additional information is the same as that of the first embodiment except for the rewriting of the Existence status of extended information flag.
A description will be given of a process of rewriting the extension status of extended information flag. FIG. 35 shows conditions for flag rewriting.
First, a case where additional information is added to a content file including content that has already been recorded will be described. In this case, the processing differs depending on the state of the extension status of extended information flag before the additional writing.
When the extension status of extended information flag before appending is '1' (not present), it is checked whether or not the same information is already included in the entry corresponding to the AV Index content. If the same information as that added is included, the Existence status of extended information flag remains “1” and no change is made. Alternatively, it may be set to “0” (whether it exists or not) without performing the checking process.
On the other hand, if the extension status of extended information flag before appending is '0' (whether it exists or not), whether all of the additional information included in the content file is included in the entry corresponding to the content of AV Index Find out. If all of the additional information is included, the Existence status of extended information flag is changed to “1” (does not exist). Alternatively, it is not necessary to make a change without performing the checking process and leave it at “0”.
Next, a case where additional information included in a content file is deleted will be described. In this case, the processing differs depending on the state of the extension status of extended information flag before deletion.
If the “existence status of extended information” flag before deletion is “1” (does not exist), the flag remains “1” and no change is made.
On the other hand, if the extension status of extension information flag before deletion is '0' (existence or unknown), there is no additional information included in the content file, or all the entries corresponding to the AV Index content are included. Check if it is included. If there is no additional information in the content file, or if it is included in the AV index, the extent status of extended information flag is changed to '1' (not present). Alternatively, it is not necessary to change the value to “0” without performing the checking process.
Next, a case where additional information is added to the AV index will be described. In this case as well, the process differs depending on the state of the extension status of extended information flag before the additional writing.
If the extension status of extended information flag before addition is “1” (does not exist), it is not changed.
On the other hand, when the extension status of the extension information flag before addition is “0” (existence or unknown), processing for checking whether the content added to the AV index is already included in the corresponding content file is performed. Do. When the content added to the AV index is already included in the corresponding content file, the Existence status of extended information flag is changed to “1”. Alternatively, it is not necessary to change the value as “0” without performing the checking process.
Further, a case where information included in the AV index is deleted will be described. In this case as well, the processing differs depending on the state of the extension status of extended information flag before deletion.
When the “existence status of extended information” flag before deletion is “1” (does not exist), processing is performed to check whether the information to be deleted is included in the corresponding content file. If it exists in the corresponding content file, the Existence status of extended information flag is changed to '0'. Alternatively, the value is changed to “0” without performing the checking process.
When the extension status of extension information flag before deletion is “0” (whether it exists or not), a process for checking whether all of the additional information included in the corresponding content file is included in the AV index is performed. Do. If all are included, the status status of extended information flag is changed to '1' (not present). Alternatively, it is not necessary to change the value to “0” without performing the checking process.
When the same information is added to or deleted from the content file and the AV index at the same time, the extension status of extended information flag is not rewritten.
(5. AV Index recording process)
The AV index recording process in this embodiment is the same as that in the first embodiment, and a description thereof will be omitted.
(6. Index file screen display processing)
The index file screen display process of this embodiment is the same as that of the first embodiment, except that the value of the extension additional information presence / absence flag (Existence status of extended information) is reflected on the index screen.
In the present embodiment, the extension additional information does not exist in the content file is “1”, and the case where it may exist is “0”, so the extension additional information presence / absence flag (Existence status of extended information) is “0”. For entries marked with ', it is necessary to open the content file and check whether extended additional information exists.
For an entry confirmed to have extended additional information, an icon indicating that the extended additional information exists or a button for displaying the extended additional information is displayed at the bottom of the index screen.
On the other hand, for an entry for which it is confirmed that the extended additional information does not exist, the extended additional information presence / absence flag (Existence status of extended information) is rewritten to “1”.
Thus, by checking the content file at the time of display and rewriting to “1” for an entry for which the extended additional information presence / absence flag is “0” even though the extended additional information does not exist, it is useless. Access is decreasing.
Further, the processing for confirming whether or not the extended additional information exists may be performed after displaying the thumbnails for all entries displayed on one screen so as not to drop the sensory response of the index screen display.
In the present embodiment, when rewriting the flag for the presence / absence of extended additional information at the time of additional information addition / editing, “0” is always recorded without comparison with the AV Index regardless of the current flag state. There may be a device that does this.
Also in this embodiment, as described in the first embodiment, identification information indicating the presence / absence of extended additional information may be set for each type of extended additional information.
Also in this embodiment, the extended additional information may be configured to include information related to a reproducible device.
Compared to the first embodiment, the effort related to the display is increased, but compared to the case where there is no information about the presence / absence of the extended additional information, the extended addition is added for the entry whose flag is “1” (not present). There is an important effect that it is not necessary to read the corresponding content file regarding the presence or absence of information.
With the configuration of the present embodiment, the process of comparing the AV Index and the additional information of the content file at the time of recording / editing the additional information and checking whether the extended additional information is included in the content file is not always performed. There may be devices, and it can be mixed with devices that do not want to increase the burden of mounting.
The data recording method of the present invention is a data recording method for recording index information of a plurality of contents including AV data on a recording medium, and the index information includes attribute information of each content, and Extended additional information related to content may be recorded outside the index, and the attribute information may include information related to the extended additional information.
The information related to the extended additional information may include information related to the presence / absence of the extended additional information. Furthermore, it is preferable that the extended additional information is moving image thumbnail data.
Further, the content may include the extended additional information. The information related to the extended additional information may include information related to the presence or absence of each type of the extended additional information. Further, the information related to the extended additional information may include information related to a device that can interpret the extended additional information.
In the data reproduction method of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information related to the content is outside the index. A method of reproducing index information when the index information includes information related to the extended additional information, and the read information of the extended additional information of each content is controlled based on the information related to the extended additional information. Good. Furthermore, it is preferable to read the extended additional information after reading the index information.
In the data reproduction method of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information related to the content is outside the index. A method for reproducing index information when the index information is recorded and includes information on the extended additional information, and may be configured to display information on the extended additional information.
Further, the data recording apparatus of the present invention is a data recording apparatus for recording index information of content including AV data on a recording medium, the means for storing attribute information of each content in the index information, and the content The extended additional information related to the information may be recorded outside the index, and the attribute information may include a means for storing information related to the extended additional information.
In the data reproducing apparatus of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information regarding the content is outside the index. An apparatus for reproducing index information when the index information includes information related to the extended additional information, comprising: means for controlling reading of the extended additional information of each content based on the information related to the extended additional information It may be.
Further, in the data reproducing apparatus of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information related to the content is outside the index. A data reproducing apparatus for index information recorded when the index information includes information related to the extended additional information may be configured to include means for displaying information related to the extended additional information.
The data recording medium of the present invention is a data recording medium in which index information of a plurality of contents including AV data is recorded. The index information includes attribute information of each of the contents, and the contents are expanded. Additional information may be recorded outside the index, and the attribute information may include information related to the extended additional information.
The program of the present invention is a computer program for recording index information of a plurality of contents including AV data on a recording medium, wherein the index information stores attribute information of each of the contents, and the contents It may be configured to include the step of recording the extended additional information related to outside the index and the step of storing the information related to the extended additional information in the attribute information.
In the program of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information related to the content is recorded outside the index. When the index information includes information on the extended additional information, the computer program reproduces the index information, and includes a step of controlling the reading of the extended additional information of each content based on the information on the extended additional information It may be.
In the program of the present invention, index information of content including AV data is recorded on a recording medium, the index information includes attribute information of each content, and extended additional information related to the content is recorded outside the index. A computer program that reproduces index information when the index information includes information on the extended additional information, and may include a step of displaying information on the extended additional information.
The recording medium of the present invention is a recording medium in which a computer-readable program for recording index information of a plurality of contents including AV data on a recording medium is recorded. A computer comprising a step of storing attribute information of content, a step of recording extended additional information related to the content outside the index, and a step of storing information related to the extended additional information in the attribute information. It may be a recording medium on which a readable program is recorded.
In the recording medium of the present invention, index information of content including AV data is recorded on the recording medium, the index information includes attribute information of each content, and extended additional information related to the content is recorded outside the index. When the index information includes information related to the extended additional information, a recording medium on which a computer-readable program that reproduces the index information is recorded, and the content of each content is based on the information related to the extended additional information. The configuration may include a step of controlling the reading of the extended additional information.
In the recording medium of the present invention, index information of content including AV data is recorded on the recording medium, the index information includes attribute information of each content, and extended additional information related to the content is recorded outside the index. And a recording medium on which a computer-readable program for reproducing the index information when the index information includes the information related to the extended additional information is recorded, and includes a step of displaying the information related to the extended additional information. It may be a recording medium on which a computer-readable program is recorded.
According to the above configuration, by providing a flag indicating the presence / absence of extended additional information, the presence / absence of extended additional information can be found on the index display screen without accessing the content, and it is even easier to use when searching for a desired video It becomes. Further, since the extended additional information is stored in the content file, even when there is a lot of extended additional information, it is possible to quickly view more information without deteriorating the index display experience response.
Also, by providing a flag indicating the presence / absence of a moving image thumbnail, it is possible to display the moving image thumbnail on the index screen without degrading the sensation response of the index display.
It should be noted that the specific embodiments or examples made in the section of the best mode for carrying out the invention are merely to clarify the technical contents of the present invention, and are limited only to such specific examples. The present invention should not be construed in a narrow sense, and various modifications can be made within the spirit of the present invention and the scope of the following claims.

Industrial applicability

  According to the configuration of the present invention, it is possible to grasp whether or not extended additional information is added to each content based on the identification information by accessing only the index information without directly accessing each content. Thus, the present invention provides a data recording method, a data reproducing method, a data recording device, a data reproducing device, a data recording medium, a program, and a program thereof that can more easily confirm the presence / absence of extended additional information in each content. It can be suitably used for a stored recording medium.

Claims (17)

In a data recording method for recording index information of a plurality of contents including AV data on a recording medium,
The data recording method, wherein the index information includes identification information indicating whether or not extended additional information is added to each content. The data recording method according to claim 1, wherein the extended additional information is moving image thumbnail data. The data recording method according to claim 1, wherein the extended additional information is included in a predetermined area of each content. The data recording method according to claim 1, wherein the extended additional information is recorded in an area different from an area of a recording medium on which the contents are recorded. The data recording method according to claim 1, wherein the identification information is set for each type of the extended additional information. The data recording method according to claim 1, wherein the identification information includes information on a device capable of reproducing the extended additional information. The identification information according to claim 1, wherein the identification information includes information indicating either a state where the extended additional information is not added or a state where the extended additional information is added or whether it is unknown. The data recording method described in 1. In a data reproduction method for reproducing index information of a plurality of contents including AV data,
The index information includes identification information indicating whether extended additional information is added to each content,
A data reproduction method for controlling reading of the extended additional information based on the identification information. The data recording method according to claim 8, wherein after the index information is read out, the extended additional information is read out before the user gives an instruction to display the extended additional information. In a data reproduction method for reproducing index information of a plurality of contents including AV data,
The index information includes identification information indicating whether extended additional information is added to each content,
A data reproduction method for displaying the identification information. In a data recording apparatus for recording index information of a plurality of contents including AV data on a recording medium,
The data recording apparatus, wherein the index information includes identification information indicating whether or not extended additional information is added to each content. In a data reproducing apparatus for reproducing index information of a plurality of contents including AV data,
The index information includes identification information indicating whether extended additional information is added to each content,
A data reproducing apparatus comprising control means for controlling reading of the extended additional information based on the identification information. In a data reproducing apparatus for reproducing index information of a plurality of contents including AV data,
The index information includes identification information indicating whether extended additional information is added to each content,
A data reproducing apparatus comprising display means for displaying the identification information. In a data recording medium in which index information of a plurality of contents including AV data is recorded,
The index information is a data recording medium including identification information indicating whether or not extended additional information is added to each content. A program for causing a computer to execute the data recording method according to any one of claims 1 to 7. A program for causing a computer to execute the data reproduction method according to any one of claims 8 to 10. A computer-readable recording medium storing the program according to claim 15 or 16.

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