JP2005005915A - Information processor and information processing method, recording medium and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the recorded contents of a recoding medium from being erroneously recognized. <P>SOLUTION: A recording/reproducing device prepares an index file 41 in which management information for managing the recorded contents of an optical disk is recorded, and records it in the optical disk at the time of recording AV data or the like in the optical disk. Also, the recording/reproducing device prepares the index file 41, and then copies the index file 41 to prepare a backup file 61, and records it in the optical disk. When the optical disk is mounted, the recording/reproducing device reads the index file 41 from the optical disk, and tires to interpret it. When the index file 41 can not be normally interpreted, or when the update date of the backup file 61 is newer than the update date of the index file 41, the recording/reproducing device interprets the backup file 61. This invention may be applied to an editing device for editing a video. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information processing apparatus and method, a recording medium, and a program, and more particularly, to an information processing apparatus and method, a recording medium, and a program that can prevent misidentification of recorded contents of the recording medium.
[0002]
[Prior art]
Management information for managing the AV data over the entire recording medium when recording the moving image data and the audio data acquired by photographing or the like (hereinafter, the moving image data and the audio data together are also referred to as AV data) on the recording medium. Are recorded on a recording medium together with AV data.
[0003]
As a result, when a device loaded with a recording medium plays back or edits AV data recorded on the recording medium, the recording address of the AV data recorded on the recording medium is set based on the management information. The AV data can be read based on the acquired AV data.
[0004]
[Problems to be solved by the invention]
However, conventionally, there has been a problem that this management information is destroyed for some reason and cannot be read, and AV data recorded on a recording medium may not be read.
[0005]
In order to solve this problem, it is conceivable to take a backup of the management information file in which the management information is recorded, and record this backup file on a recording medium together with the file in which the management information is recorded.
[0006]
However, in this case, when a recording medium is mounted on a conventional machine that is not supposed to be backed up, AV data is edited, and the editing result is additionally recorded on the recording medium, the management information file is edited. Although the result is reflected, the edited result is not reflected in the backup file. Therefore, when the management information file of the recording medium is destroyed, the backup file is referred to, but the backup file does not accurately reflect the content of the AV data recorded on the recording medium. There has been a problem that a reading error may occur due to the device misidentifying the recorded contents.
[0007]
The present invention has been made in view of such a situation, and prevents misidentification of the recorded contents recorded on the recording medium, thereby improving the convenience of the recording medium.
[0008]
[Means for Solving the Problems]
A first information processing apparatus according to the present invention includes a creation unit that creates a backup file of a management information file after creating a management information file for managing data recorded on a recording medium, and creates the management information file Control recording of the management information file to which the time information indicating the date and time is added to the recording medium, and recording to control the recording of the backup file to which the time information indicating the creation date and time of the backup file is added to the recording medium And a control means.
[0009]
A first information processing method of the present invention is a management information file for managing data recorded on a recording medium, and records the management information file to which time information indicating the creation date and time is added to the recording medium. A first recording control step for controlling the management information file, a creation step for creating a backup file of the management information file after the management information file is created, and a backup file to which time information indicating the creation date and time is added to the recording medium And a second recording control step for controlling the recording.
[0010]
The program of the first recording medium of the present invention is a management information file for managing data recorded on the recording medium, and stores the management information file to which the time information indicating the creation date is added to the recording medium. First recording control step for controlling recording, creation step for creating backup file of management information file after creation of management information file, and recording medium of backup file to which time information indicating creation date and time is added And a second recording control step for controlling recording on the recording medium.
[0011]
A first program of the present invention controls a recording of a management information file for managing data recorded on a recording medium, to which the management information file to which time information indicating the creation date and time is added is recorded A first recording control step, a creation step for creating a backup file of the management information file after the management information file is created, and a recording of the backup file to which time information indicating the creation date and time is added to the recording medium And a second recording control step for controlling the computer.
[0012]
The second information processing apparatus according to the present invention compares the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file. A determination unit that determines whether the file is created based on the management information file; and a control unit that controls execution of reference to the management information recorded in the backup file according to a determination result by the determination unit. And
[0013]
The second information processing method of the present invention compares the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file, so that the backup file is the latest. A determination step for determining whether or not the file is created based on the management information file, and a control step for controlling execution of reference to the management information recorded in the backup file according to the determination result of the determination step. It is characterized by.
[0014]
The program of the second recording medium of the present invention compares the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file. And a control step for controlling execution of reference to the management information recorded in the backup file according to the determination result of the determination step. It is characterized by that.
[0015]
The second program of the present invention compares the creation date and time of the management information file on the computer and the creation date and time of the management information file recorded on the recording medium together with the management information file. A determination step for determining whether or not the file is created based on the management information file, and a control step for controlling execution of reference to the management information recorded in the backup file according to the determination result of the determination step processing It is characterized by making it.
[0016]
In the first information processing apparatus and method, recording medium, and program of the present invention, after the management information file for managing the data recorded on the recording medium is created, a backup file of the management information file is created. The recording of the management information file to which the time information indicating the creation date and time of the management information file is added to the recording medium is controlled, and the backup file to which the time information indicating the creation date and time of the backup file is added to the recording medium. Recording is controlled.
[0017]
In the second information processing apparatus and method, the recording medium, and the program of the present invention, the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file are recorded. In comparison, it is determined whether or not the backup file has been created based on the latest management information file, and execution of reference to the management information recorded in the backup file is controlled according to the determination result.
[0018]
The present invention can be applied to, for example, a photographing device for photographing a video, an editing device for editing a video, and the like.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. Correspondences between constituent elements described in the claims and specific examples in the embodiments of the present invention are exemplified as follows. This description is to confirm that specific examples supporting the invention described in the claims are described in the embodiments of the invention. Therefore, even if there are specific examples that are described in the embodiment of the invention but are not described here as corresponding to the configuration requirements, the specific examples are not included in the configuration. It does not mean that it does not correspond to a requirement. On the contrary, even if a specific example is described here as corresponding to a configuration requirement, this means that the specific example does not correspond to a configuration requirement other than the configuration requirement. not.
[0020]
Further, this description does not mean that all the inventions corresponding to the specific examples described in the embodiments of the invention are described in the claims. In other words, this description is an invention corresponding to the specific example described in the embodiment of the invention, and the existence of an invention not described in the claims of this application, that is, in the future, a divisional application will be made. Nor does it deny the existence of an invention added by amendment.
[0021]
The information processing apparatus according to claim 1 (for example, the recording / reproducing apparatus 1 of FIG. 1) is a management information file (for example, FIG. 1) for managing data recorded on a recording medium (for example, the optical disk 32 of FIG. 1). After the first index file 41) is created, a creation means (for example, the backup file creation unit 21 in FIG. 1) for creating a backup file of the management information file (for example, the backup file 61 in FIG. 1), and the management information file Controls the recording of the management information file to which the time information indicating the creation date and time is added to the recording medium, and the recording of the backup file to which the time information indicating the creation date and time of the backup file is added to the recording medium And a recording control means (for example, the drive 31 in FIG. 1).
[0022]
The information processing method according to claim 2 is a management information file (for example, the index file 41 of FIG. 1) for managing data recorded on a recording medium (for example, the optical disk 32 of FIG. 1). After the first recording control step (for example, step S204 in FIG. 12) for controlling the recording of the management information file to which the time information indicating the date and time is added to the recording medium, and the management information file is created, the management information file A creation step for creating a backup file of the file (for example, step S205 in FIG. 12) and a second recording control step for controlling recording of the backup file to which the time information indicating the creation date and time is added to the recording medium (for example, And step S207 in FIG.
[0023]
The configuration requirements of the recording medium program of claim 3 and the specific example of the configuration requirements of the program of claim 4 are the same as those of the information processing method of claim 2, and thus the description thereof is omitted.
[0024]
The information processing apparatus (for example, the recording / reproducing apparatus 1 in FIG. 1) according to claim 5 includes a recording medium (for example, FIG. 1) together with the creation date and time of the management information file (for example, the index file 41 in FIG. 1) and the management information file. The backup date of the management information file (for example, the backup file 61 in FIG. 1) recorded on the optical disc 32 of the first disc is compared, and the backup file is created based on the latest management information file. Determining means (for example, the file selection unit 16 in FIG. 1), and control means (for example, FIG. 1) for controlling execution of reference to the management information recorded in the backup file according to the determination result by the determining means. CPU 11).
[0025]
The information processing method according to claim 6 is recorded on a recording medium (for example, the optical disc 32 in FIG. 1) together with the creation date and time of the management information file (for example, the index file 41 in FIG. 1) and the management information file. A determination step for determining whether or not the backup file is created based on the latest management information file by comparing the creation date and time of the backup file of the management information file (for example, the backup file 61 of FIG. 1) (for example, 15 and a control step (for example, step S409 to step S412 in FIG. 15) for controlling execution of reference to the management information recorded in the backup file according to the determination result by the process in the determination step. It is characterized by.
[0026]
The configuration requirements of the recording medium program according to claim 7 and the specific examples of the configuration requirements of program according to claim 8 are the same as those of the information processing method according to claim 2, and thus the description thereof is omitted.
[0027]
Embodiments of the present invention will be described below with reference to the drawings.
[0028]
FIG. 1 is a block diagram showing a configuration of an embodiment of a recording / reproducing apparatus 1 to which the present invention is applied.
[0029]
The recording / reproducing apparatus 1 in FIG. 1 is a video camera such as a camcorder (registered trademark), for example, and is used for coverage of news programs for broadcasting, games such as sports, and video content such as movies. Device. The recording / reproducing apparatus 1 is operated by a photographing staff and photographs each scene based on the production instruction information. Then, image data and audio data obtained by photographing are recorded on a recording medium such as the optical disk 32.
[0030]
In addition, the recording / reproducing apparatus 1 not only stores original image data that is image data obtained by imaging, but also low resolution (low resolution) image data (hereinafter referred to as low resolution data) on the optical disc 32. Can be recorded. Original image data has a large amount of data, but is high-quality image data, and is therefore used for a finished video program product. On the other hand, low resolution data is image data corresponding to an image of a frame with a small number of pixels, which is generated by thinning out the number of pixels of each frame from the original image data. Further, the low resolution data may be further encoded by, for example, MPEG (Moving Picture Experts Group) 4 system. This low resolution data has lower image quality than the original image data, but the data amount is small, so the processing load such as transmission and reproduction is light, and it is mainly used for coarse editing processing.
[0031]
Further, for example, the recording / reproducing apparatus 1 not only reproduces and displays necessary image data and the like in a suitable order, but also performs an editing process on the image data obtained by the interview. This editing process includes a rough editing process and a main editing process.
[0032]
The rough editing process is a simple editing process for image data and audio data. For example, the recording / reproducing apparatus 1 includes a plurality of pieces of data (hereinafter referred to as clip data) related to video content including image data, audio data, and the like corresponding to a clip which is a unit indicating one imaging process in the rough editing process. When the clip data is acquired, the clip data to be used in the main editing is selected from those clip data, and the necessary video portion is further selected (Logging) from the selected clip data. An editing start position (In point) and an editing end position (Out point) corresponding to the video part are set using, for example, a time code, and the corresponding part is extracted (Ingesting) from the above-described clip data. .
[0033]
Note that a clip is not only a single imaging process, but also a unit indicating the time from the start of imaging to the end of imaging, and a unit indicating the length of various data obtained by the imaging process. It is also a unit indicating the data amount of various data obtained by the imaging process. Furthermore, the clip may also indicate the collection of various data itself.
[0034]
This editing process connects the clip data that has undergone the rough editing process, performs final image quality adjustments on the image data, and creates complete package data that is data to be broadcast in programs, etc. It is processing to do.
[0035]
In the present embodiment, the recording / playback apparatus 1 performs shooting, playback, and editing, but it is of course possible to execute these by independent apparatuses.
[0036]
In FIG. 1, a CPU (Central Processing Unit) 11 executes various processes according to a program stored in a ROM (Read Only Memory) 12. A RAM (Random Access Memory) 13 appropriately stores data and programs necessary for the CPU 11 to execute various processes.
[0037]
The clip management unit 14 manages a process of creating a clip and recording it on the optical disc 32, a process of changing the content of the clip recorded on the optical disc 32, a process of deleting the clip recorded on the optical disc 32, and the like. .
[0038]
The edit list management unit 15 generates an edit list, which is information related to the editing result, based on information related to the editing content, information related to the edited data, etc. when editing processing is performed by connecting clips together. To do. The edit list management unit 15 performs nondestructive editing processing without updating various data to be edited.
[0039]
The file selection unit 16 includes an index file, which is a management information file for managing the recording contents of the optical disc 32 over the entire optical disc 32, and a backup file created by backing up (duplicating) the index file. Based on which file, it is determined whether to read the data recorded on the optical disk 32 mounted in the drive 31.
[0040]
The clock unit 17 outputs the date and time (year, month, day, hour, minute, second) of the current time.
[0041]
The index file management unit 19 creates an index file (INDEX.XML) 41 when formatting the optical disk 32 and records it on the optical disk 32 via the drive 31. The index file management unit 19 also describes the contents of the index file 41 when there is a change in the data recorded on the optical disc 32, such as when a clip is recorded on the optical disc 32 or an edit list is recorded. And is recorded on the optical disk 32 via the drive 31.
[0042]
The disc information file management unit 20 executes processing for creating and updating a disc information file (DISCINFO.XML) 51, which is a reproduction history list file of the optical disc 32.
[0043]
The backup file creation unit 21 creates a backup file (INDEX.BUP) 61 by duplicating the index file 41 when the index file 41 is created by the index file management unit 41 and when the index file 41 is updated. This is recorded on the optical disk 32 via the drive 31. Further, the backup file creation unit 21 duplicates the disk information file 51 when the disc information file 51 is created by the disc information file management unit 20 and when the disc information file 51 is updated. The backup file (DISCINFO) .BUP) 62 is created and recorded on the optical disc 32 via the drive 31.
[0044]
The CPU 11, ROM 12, RAM 13, clip management unit 14, edit list management unit 15, file selection unit 16, clock unit 17, index file management unit 19, disk information file management unit 20, and backup file management unit 21 are connected to the bus 18. Are connected to each other. An input / output interface 22 is also connected to the bus 18.
[0045]
The input / output interface 22 is connected to an operation unit 23 including buttons, dials, and the like, and outputs an operation signal based on an operation input to the operation unit 23 to the CPU 11. The input / output interface 22 includes a display unit 24 configured by an LCD (Liquid Crystal Display) or the like, an audio output unit 25 configured by a speaker or the like, and an imaging unit that captures an image of a subject and collects audio. 26, a storage unit 27 composed of a hard disk, a communication unit 28 that communicates data with other devices via a network such as the Internet, a recording medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory A drive 29 used when reading data from or writing data to the removable medium 30 is also connected.
[0046]
Further, the input / output interface 22 is also connected to a drive 31 for recording data on the optical disc 32 and reading data from the optical disc 32.
[0047]
The optical disk 32 uses a blue-violet laser having a numerical aperture (NA) of 0.85 and a wavelength of 405 nm, for example, and has a recording capacity of a minimum mark length of 0.14 μm and a track pitch of 0.32 μm and a large capacity (for example, 27 gigabytes). Is an optical disc capable of recording The optical disc 32 may be other recording media, such as a DVD-RAM (Digital Versatile Disc-Random Access Memory), DVD-R (DVD-Recordable), DVD-RW (DVD-ReWriteable), Various optical disks such as DVD + R (DVD + Recordable), DVD + RW (DVD + Rewriteable), CD-R (Compact Disc-Recordable), or CD-RW (CD-ReWriteable) may be used.
[0048]
Next, FIG. 2 is a block diagram illustrating an internal configuration example of the recording / reproducing apparatus 101 to which a function for creating a backup file of the index file 41 and the disc information file 51 is not added.
[0049]
The recording / playback apparatus 101 in FIG. 2 has a configuration in which the backup file creation unit 21 existing in the recording / playback apparatus 1 in FIG. 1 is omitted. That is, in the recording / reproducing apparatus 101 of FIG. 2, the CPU 111 to the disc information file management unit 120 have the same configuration as the CPU 11 to the disc information file management unit 20 of the recording / reproducing apparatus 1 of FIG. In the recording / reproducing apparatus 101 of FIG. 2, the input / output interface 121 to the drive 130 have the same configuration as the input / output interface 22 to the drive 31 of the recording / reproducing apparatus 1 of FIG. 2 is loaded with the same optical disc 32 as shown in FIG.
[0050]
Next, a file system for managing each data recorded on the optical disc 32, and a directory structure and files in the file system will be described.
[0051]
Any file system may be used as a file system for managing data recorded on the optical disc 32. For example, UDF (Universal Disk Format), ISO 9660 (International Organization for Standardization 9660), or the like may be used. When a magnetic disk such as a hard disk is used instead of the optical disk 32, a file system such as FAT (File Allocation Tables), NTFS (New Technology File System), HFS (Hierarchical File System), or UFS (Unregistered Trademark) is used. ) File System) or the like may be used. A dedicated file system may be used.
[0052]
In this file system, data recorded on the optical disc 32 is managed by a directory structure and files as shown in FIG.
[0053]
In FIG. 3, a root directory (ROOT) 201 includes a PROAV directory 202 in which information relating to essence data such as image data and audio data, an edit list indicating the editing result of the essence data, and the like are arranged in a lower directory. Provided. In addition, although illustration is abbreviate | omitted in the root directory 201, structure table data etc. are also provided.
[0054]
In the PROAV directory 202, titles and comments for all essence data recorded on the optical disc 32, and image data corresponding to a representative image that is a frame representing all the image data recorded on the optical disc 32 are stored. A disk metafile (DISCMETA.XML) 203 which is a file including information such as a path, and an index file (INDEX.XML) 41 including management information for managing all clips and edit lists recorded on the optical disk 32. , And an index file 41 backup file (INDEX.BUP) 61 is provided. Note that the backup file 61 is a copy of the index file 41, and reliability is improved by preparing two files.
[0055]
Further, the PROAV directory 202 is metadata for the entire data recorded on the optical disc 32, and is, for example, a disc information file (DISCINFO.XML) which is a file including information such as disc attributes, playback start position, or Reclnhi. 51 and a backup file (DISKINFO.BUP) 62 of the disc information file 51 are provided. Note that the backup file 62 is a copy of the disk information file 51, and the reliability is improved by preparing two files.
[0056]
In addition to the above-mentioned files, the PROAV directory 202 includes a clip root directory (CLPR) 204 in which clip data is provided in a lower directory, and an edit list root directory in which edit list data is provided in a lower directory. (EDTR) 205 is provided.
[0057]
In the clip root directory 204, clip data recorded on the optical disc 32 is managed separately for each clip. For example, in the case of FIG. 3, three clip data are stored in the clip directory (C0001). ) 211, a clip directory (C0002) 212, and a clip directory (C0003) 213. That is, each piece of data of the first clip recorded on the optical disc 32 is managed as a file in a directory under the clip directory 211, and each piece of data of the clip recorded on the optical disc 32 is subordinate to the clip directory 212. Each piece of clip data recorded as a directory file and thirdly recorded on the optical disc 32 is managed as a file in a directory under the clip directory 213.
[0058]
In the edit list root directory 205, the edit list recorded on the optical disk 32 is managed separately for each editing process. For example, in the case of FIG. 3, four edit lists include the edit list. The list directory (E0001) 214, the edit list directory (E0002) 215, the edit list directory (E0003) 216, and the edit list directory (E0004) 217 are managed separately. That is, the edit list indicating the first editing result of the clip recorded on the optical disc 32 is managed as a file in a directory below the edit list directory 214, and the editing list indicating the second editing result is the edit list directory 215. The edit list showing the third editing result is managed as a file under the edit list directory 216, and the editing list showing the fourth editing result is the edit list directory 217. It is managed as a file in the lower directory.
[0059]
In the directory below the clip directory 211 provided in the above-described clip root directory 204, each piece of data of the clip first recorded on the optical disc 32 is provided and managed as a file as shown in FIG.
[0060]
In the case of FIG. 4, the clip directory 211 includes a clip information file (C0001C01.SMI) 221 that is a file for managing this clip, and a video file (C0001V01.MXF) 222 that is a file that includes image data of this clip, respectively. Audio files (C0001A01.MXF to C0001A04.MXF) 223 to 226 which are four files including audio data of each channel of this clip, and low resolution data file (C0001S01) which is a file including low resolution data corresponding to the image data of this clip .MXF) 227, a variable corresponding to the essence data of this clip, for example, LTC (Longitudinal Time Cord) and the frame number. A clip metadata file (C0001M01.XML) 228, which is a file including clip metadata, which is metadata that does not require real-time properties, such as a table, and requests real-time properties such as LTC corresponding to the essence data of this clip. The frame metadata file (C0001R01.BIM) 229, which is a file including frame metadata that is metadata to be generated, and the frame structure of the video file 222 (for example, information on the compression format for each picture in MPEG or the like, A file such as a picture pointer file (C0001I01.PPF) 230, which is a file in which information such as an offset address from the head) is described, is provided.
[0061]
In the case of FIG. 4, image data, low resolution data, and frame metadata, which are data that requires real-time performance during reproduction, are each managed as one file so that the readout time does not increase.
[0062]
The audio data is also required to be real-time during reproduction, but four channels are prepared and are managed as different files in order to cope with the multi-channel audio. That is, the audio data has been described as being managed as four files. However, the present invention is not limited to this, and the number of files corresponding to the audio data may be three or less, or may be five or more.
[0063]
Similarly, the image data, the low resolution data, and the frame metadata may be managed as two or more files, respectively, depending on circumstances.
[0064]
In FIG. 4, clip metadata that does not require real-time property is managed as a file different from frame metadata that requires real-time property. This is to prevent unnecessary metadata such as image data from being read out during normal playback. By doing so, the processing time of playback processing and the load required for processing can be reduced. Can do.
[0065]
Note that the clip metadata file 228 is described in XML (extensible Markup Language) format in order to provide versatility, but the frame metadata file 229 reduces the processing time and the load required for the processing. Therefore, it is a BIM format file obtained by compiling an XML format file.
[0066]
The file configuration example of the clip directory 211 shown in FIG. 4 can be applied to all clip directories corresponding to each clip recorded on the optical disc 32. That is, the file configuration example shown in FIG. 4 can be applied to the other clip directories 212 and 213 shown in FIG.
[0067]
In the above, each file included in the clip directory corresponding to one clip has been described. However, the file structure is not limited to the above-described example, and a clip metadata file corresponding to the clip is stored in a directory below each clip directory. As long as there exists, any configuration may be used.
[0068]
A flag indicating whether or not each of the clip directories 211 to 213 can be deleted can be set individually. That is, for example, when the user does not want to delete the video file 222 and the audio files 223 to 226 in the clip directory 211, the user can set the deletion prohibition of the clip directory 211 by operating the operation unit 23. When the clip directory 211 is set, a deletion prohibition flag is set. In this case, even if the user mistakenly instructs the deletion of the file (for example, the video file 222) in the clip directory 211 thereafter, the file can be prevented from being deleted. Thereby, it is possible to prevent a file necessary for the user from being deleted accidentally. In addition, clip information files, video files, audio files, low resolution data files, clip metadata files, frame metadata files, and picture pointer files created by one shooting process are recorded together in the clip directory, and then clipped. By setting a deletion prohibition flag for a directory, individual files in the clip directory, i.e., clip information files, video files, audio files, low resolution data files, clip metadata files, frame metadata files, and It is not necessary to set a deletion prohibition flag for each picture pointer file, and it is possible to save the user.
[0069]
Next, an example of a file structure in a directory below the edit list root directory 205 in FIG. 3 will be described. In the directory below the edit list directory 215 provided in the above-described edit list root directory 205, edit list data, which is information relating to the second editing result of each piece of clip data recorded on the optical disc 32, is shown in FIG. It is provided and managed as a file as shown.
[0070]
In the case of FIG. 5, the edit list directory 215 includes an edit list file (E0002E01.SMI) 241, which is a file for managing the editing result (edit list), and essence data after editing (all the editing data used for editing). Edit list clip which is a file containing clip metadata corresponding to clip essence data (the portion extracted as edited data) or clip metadata newly generated based on the clip metadata A metadata file (E0002M01.XML) 242 is provided.
[0071]
The edit list clip metadata file 242 is based on the clip metadata of a clip used for editing (a clip metadata file existing in a directory under the clip root directory 204) based on the editing result, as will be described later. This is a file including new clip metadata generated in this way. For example, when editing is performed, a portion corresponding to the edited essence data is extracted from the clip metadata included in the clip metadata file 228 of FIG. 4, and the edited essence data is used as one clip. Are reconstructed and managed as an edit list clip metadata file. That is, new clip metadata having one clip as the edited essence data is added to the edited essence data, and the clip metadata is managed as one edit list clip metadata file. Therefore, the edit list clip metadata file is generated for each edit.
[0072]
The edit list clip metadata file 242 is described in the XML format in order to provide versatility.
[0073]
The configuration example of the files in the edit list directory 215 shown in FIG. 5 can be applied to all edit lists (editing results). That is, since the configuration example of the file shown in FIG. 5 can be applied to the other edit list directories 214, 216, or 217 shown in FIG. 3, the description thereof is omitted.
[0074]
In the above, each file included in the edit list directory corresponding to one editing operation has been described. However, the configuration of the file is not limited to the example described above, and a directory below each edit list directory corresponds to the editing. Any configuration may be used as long as the edit list clip metadata file exists.
[0075]
Next, the format process of the recording / reproducing apparatus 1 of FIG. 1, that is, the process of formatting the optical disc 32 and recording the directory structure of FIG.
[0076]
In step S <b> 101, the CPU 11 creates a PROAV directory 202 in the root directory 201 of the optical disc 32.
[0077]
In step S <b> 102, the CPU 11 creates a clip root directory 204 under the PROAV directory 202 of the optical disc 32.
[0078]
In step S <b> 103, the CPU 11 creates an edit list root directory 205 under the PROAV directory 202 of the optical disc 32.
[0079]
In step S104, the index file management unit 19 creates an index file 41. The index file management unit 19 obtains the current time from the clock unit 17 at the time when the index file 41 is created, and adds this to the index file 41 as a time stamp of the creation date. Then, the index file management unit 19 records the created index file 41 under the PROAV directory 202 of the optical disc 32 via the drive 31.
[0080]
After the index file 41 is created in step S104, in step S105, the backup file creation unit 21 creates the backup file 61 by duplicating the index file 41 created in step S104. Note that the backup file creation unit 21 acquires the current time from the clock unit 17 at the timing when the backup file 61 is created, and adds this to the backup file 61 as a time stamp of the creation date. Then, the backup file creation unit 21 records the created backup file 61 under the PROAV directory 202 of the optical disc 32 via the drive 31.
[0081]
In step S106, the disc information file management unit 20 creates a disc information file 51. The disc information file management unit 20 acquires the current time from the clock unit 17 at the time when the disc information file 51 is created, and adds this to the disc information file 51 as a time stamp of the creation date. Then, the disc information file management unit 20 records the created disc information file 51 under the PROAV directory 202 of the optical disc 32 via the drive 31.
[0082]
After the disc information file 51 is created in step S106, in step S107, the backup file creation unit 21 creates the backup file 62 by duplicating the disc information file 51 created in step S106. The backup file creation unit 21 obtains the current time from the clock unit 17 at the timing when the backup file 62 is created, and adds this to the backup file 62 as a time stamp of the creation date. Then, the backup file creation unit 21 records the created backup file 62 under the PROAV directory 202 of the optical disc 32 via the drive 31.
[0083]
In step S <b> 108, the CPU 11 creates a disk metafile (DISCMETA.XML) 203 and records it under the PROAV directory 202 of the optical disk 32 via the drive 31.
[0084]
The format process is executed as described above. Note that the clip directories 211 to 213 and the edit list directories 214 to 217 are not recorded on the optical disc 32 when the formatting process is completed.
[0085]
As described above, by creating the backup file 61 of the index file 41 after creating the index file 41, the time stamp of the index file 41 is always earlier than the time stamp of the backup file 61. It becomes. Further, by creating the backup file 62 of the disc information file 51 after creating the disc information file 51, the time stamp of the disc information file 51 is always the time before the time stamp of the backup file 62. .
[0086]
Thereafter, each time the photographing process is executed, a clip directory is created and recorded under the clip root directory 204. FIG. 4 shows an example after three shooting processes are executed, and clip files 211 to 213 are recorded. Also, edit list directories 214 to 217 are created according to the editing process.
[0087]
Next, FIG. 7 to FIG. 10 show description examples of the index file 41. 8 is a continuation of the description of FIG. 7, FIG. 9 is a continuation of the description of FIG. 8, and FIG. 10 is a continuation of the description of FIG.
[0088]
Among the descriptions “<? Xml version =“ 1.0 ”encoding =“ UTF-8 ”?>” On the first line in FIG. 7, “xml version =“ 1.0 ”” indicates that the index file 41 is XML. Represents a document. “Encoding =“ UTF-8 ”” represents that the character code is fixed to UTF-8. The description “<indexFile xmlns =“ urn: schema-professional Disc: index ”” on the second line in FIG. 7 represents the namespace of the XML document. The description “indexId =“ 01234456789ABCDEF01234456789ABCDEF ”>” on the third line in FIG. 7 represents an ID (Identification) for uniquely identifying the index file 41 itself. That is, in this description example, the ID of the index file 41 is “01234456789ABCDEF01234456789ABCDEF”.
[0089]
The description “<clipTable path =“ / PROAV / CLPR / ”>” on the fourth line in FIG. 7 indicates the absolute path in the optical disc 32 of the directory in which the clip is recorded. That is, “/ PROAV / CLPR /” indicates that the clip is recorded under the clip root directory 204 under the PROAV directory 202. The description “<!-Normal Clip->” on the fifth line in FIG. 7 indicates that there is a description of a normal clip from the line immediately after that. Of the description “<clip id =” C0001 ”umid =“ 0D1213000000000000044444444484EEEE00E0188E130B ”” on the sixth line in FIG. 7, “id =“ C0001 ”” represents the ID of the clip. ID of “C0001”. “Umid =“ 0D12130000000000000010444444484EEEE00E0188E130B ”” indicates the UMID of this clip. In this description example, the UMID is “0D1213000000000000010444444484EEEE00E0188E130B”.
[0090]
The description “file =” C0001C01. SMI ”fps =“ 59.94i ”dur =“ 12001 ”ch =“ 4 ”aspectRatio =“ 4: 3 ”>”, “file =” C0001C01. “SMI” ”indicates the file name of the clip information file 221. This description example indicates that the file name of the clip information file 221 is “C0001C01.SMI”. “Fps =“ 59.94i ”” indicates the resolution in the time axis direction of the video file 222 included in the clip directory 211. The unit is field / sec. In this description example, the signal frequency of the NTSC system is shown. Further, “dur =“ 12001 ”” indicates the effective length of the clip in the time direction. The unit is the number of frames, and the time of one frame can be known by the fps attribute. “Ch =“ 4 ”” indicates the number of audio channels included in the clip. This description example shows that the number of audio channels is four. Further, “aspectRatio =“ 4: 3 ”” indicates the aspect ratio of the video file 222. In this description example, the aspect ratio is 4: 3.
[0091]
The description “<video umid =“ 0D121300000000000000010444444484EEEE00E0188E130B ”” on the eighth line in FIG. 7 indicates the attribute of the video element, and “umid =“ 0D121300000000010444444484EEEE00E0188E130B ”” indicates the UMID of the video file 222. That is, in this description example, the UMID is “0D121300000000000000010444444484EEEE00E0188E130B”.
[0092]
The description “file =” C0001V01. “MXF” type = “DV25 — 411” header = “65536” /> ”indicates the attribute of the video element following the eighth line. “File =” C0001V01. MXF ″ ”describes the file name of the video file 222. In this description example, the file name “C0001V01.MXF” is described. Further, “type =“ DV25 — 411 ”” indicates the file format (encoding method) of the video file 222. In this description example, “DV25 — 411” is described as the file format. “Header =“ 65536 ”” indicates the header size of the video file 222. The unit is Byte. This means that the Body data starts from the position that seeks the header size from the beginning of the file. In this description example, it is indicated that the header size is 65536 bytes.
[0093]
The description “<audio umid =“ 0D121300000000000000010444444484EEEE00E0188E130B ”” on the 10th line in FIG. 7 indicates the attributes included in the audio element. This audio element manages information related to the audio file 223 included in the clip. “Umid =“ 0D12130000000000000010444444484EEEE00E0188E130B ”” indicates the UMID of the audio file 223, and in this description example, the UMID of the audio file 223 indicates “0D1213000000000000010444444484EEEE00E0188E130B”.
[0094]
The description “file =” C0001A01. “MXF” type = “LPCM16” header = “65536” trackDst = “CH1” /> ”indicates the attribute of the audio file 223 following the tenth line. “File =” C0001A01. MXF ″ ”describes the file name of the audio file 223. In this description example, “C0001A01.MXF” is described as the file name. “Type =“ LPCM16 ”” indicates the file format of the audio file 223. In this description example, “LPCM16” is described as the file format. “Header =“ 65536 ”” indicates the header size of the audio file 223. The unit is Byte. In this description example, it is indicated that the header size is 65536 bytes. “TrackDst =“ CH1 ”” indicates an audio channel for outputting sound based on the audio file 223. In this description example, “CH1” is described as an audio channel for outputting sound based on the audio file 223.
[0095]
In the 12th and 13th lines of FIG. 7, the attributes of the audio file element for the audio file 224 with the file name “C0001A02.MXF” are described. The description is basically the same as the description on the 10th and 11th lines in FIG.
[0096]
Similarly, the 14th and 15th lines of FIG. 7 describe audio file element attributes for the audio file 225 with the file name “C0001A03.MXF”. The description is basically the same as the description on the 10th and 11th lines in FIG.
[0097]
Similarly, the 16th and 17th lines of FIG. 7 describe the attributes of the audio file element for the audio file 226 with the file name “C0001A04.MXF”. The description is basically the same as the description on the 10th and 11th lines in FIG.
[0098]
The description “<subStream umid =“ 0D12130000000000000010444444484EEEE00E0188E130B ”” on the 18th line in FIG. 7 describes a subStream element, that is, an attribute related to the low resolution data file 227. “Umid =“ 0D12130000000000000010444444484EEEE00E0188E130B ”” indicates the UMID of the low-resolution data file 227, and in this description example, the UMID of the low-resolution data file 227 indicates “0D121300000000000010444444484EEEE00E0188E130B”.
[0099]
The description “file =” C0001S01. “MXF” type = “PD-SubStream” header = “65536” /> ”describes attributes relating to the low-resolution data file 227 following the 18th line in FIG. “File =” C0001S01. MXF ″ ”indicates the file name of the low resolution data file 227. In this description example, the file name “C0001S01.MXF” of the low resolution data file 227 is described. “Type =“ PD-SubStream ”” indicates the file format of the low resolution data file 227. In this description example, “PD-SubStream” is described as the file format of the low resolution data file 227. “Header =“ 65536 ”” indicates the header size of the low resolution data file 227. In this description example, “65536” is described as the header size, which indicates that the header size of the low resolution data file 227 is 65536 bytes.
[0100]
The description “<meta file =” C0001M01. XML “type =“ PD-Meta ”/>” describes the attributes of the clip metadata file 228. “File =” C0001M01. "XML""indicates the file name of the clip metadata file 228. In this description example, “C0001M01.XML” is described as the file name. “Type =“ PD-Meta ”” indicates the file format of the clip metadata file 228. In the present embodiment, “PD-Meta” is described as the file format.
[0101]
The description “<rtmeta file =” C0001R01. “BIM” type = “std2k” header = “65536” /> ”describes the attributes of the frame metadata file 229. “File =” C0001R01. “BIM” ”indicates the file name of the frame metadata file 229. In this description example, “C0001R01.BIM” is described as the file name. “Type =“ std2k ”” indicates the file format of the frame metadata file 229. In this description example, “std2k” is described as the file format of the frame metadata file 229. “Header =“ 65536 ”” indicates the header size of the frame metadata file 229. In this description example, “65536” is described as the header size of the frame metadata file 229, which indicates that the header size is 65536 bytes.
[0102]
The description “</ clip>” on the 22nd line in FIG. 7 indicates that the description of the attribute related to the clip with the clip ID “C0001” has been completed. That is, information on one clip having the clip ID “C0001” is described in the 5th to 22nd lines in FIG.
[0103]
In the 23rd line in FIG. 7 to the 13th line in FIG. 8, attributes relating to the clip with the clip ID “C0002” are described. Since the description content is basically the same as that of the clip with the clip ID “C0001”, detailed description thereof is omitted.
[0104]
Further, the 14th line in FIG. 8 to the 3rd line in FIG. 9 describe attributes relating to the clip with the clip ID “C0003”. Since the description content is basically the same as that of the clip with the clip ID “C0001”, detailed description thereof is omitted.
[0105]
Furthermore, in the 4th to 21st lines in FIG. 9, attributes relating to the clip with the clip ID “C0004” are described. Since the description content is basically the same as that of the clip with the clip ID “C0001”, detailed description thereof is omitted.
[0106]
The description “</ clipTable>” on the 22nd line in FIG. 9 indicates that the description about the clip has been completed up to the 22nd line. That is, the management information regarding the four clips with the clip IDs “C0001” to “C0004” is described in the fourth line in FIG. 7 to the 22nd line in FIG. Although only three clip directories are described in FIG. 3, the description example of the index file 41 in FIGS. 7 to 10 shows a description example when there are four clip directories.
[0107]
The description “<editlistTable path =” / PROAV / EDTR / ”>” on the 23rd line in FIG. 9 is a character string indicating the absolute path in the optical disc 32 of the directory in which the edit list is recorded. That is, in this description example, the edit list is recorded in the edit root directory 205 under the PROAV directory 202.
[0108]
Among the descriptions “<editlist id =“ E0001 ”umid =“ 0D121300000000000000010444444484EEEE00E0188E130B ”” on the 24th line in FIG. 9, “id =“ E0001 ”” indicates the ID of the edit list. In this description example, “E0001” is described as the ID of the edit list. Further, “umid =“ 0D12130000000000000010444444484EEEE00E0188E130B ”” indicates the UMID of the edit list. In this description example, “0D12130000000000000010444444484EEEE00E0188E130B” is described as the UMID of the edit list.
[0109]
The description “file =” E0001E01. The SMI “dur =“ 500 ”fps =“ 59.94i ”ch =“ 4 ”aspectRatio =“ 4: 3 ”>” describes the attributes of the edit list following the 24th line in FIG. “File =” E0001E01. "SMI""indicates the file name of the edit list. In this description example, “E0001E01.SMI” is described as the file name of the edit list. “Dur =“ 500 ”” indicates the effective length of the edit list in the time direction. The unit is the number of frames. Further, “fps =“ 59.94i ”” indicates a resolution in the time axis direction of the clip. The unit is field / sec. In this description example, the signal frequency of the NTSC system is shown. “Ch =“ 4 ”” indicates the number of audio channels included in the edit list. This description example shows that the number of audio channels is four. “AspectRatio =“ 4: 3 ”” indicates the aspect ratio of the video file included in the edit list. In this description example, the aspect ratio is 4: 3.
[0110]
The description “<meta file =” E0001M01. XML "type =" PD-Meta "/>" describes the attributes of the edit list clip metadata file. “File =” E0001M01. "XML""indicates the file name of the edit list clip metadata file. In this description example, “E0001M01.XML” is described as the file name. “Type =“ PD-Meta ”” indicates the file format of the edit list clip metadata file. In the present embodiment, “PD-Meta” is described as the file format.
[0111]
The description of the index file 41 continues from FIG. 9 to FIG. The description “</ editlist>” on the first line in FIG. 10 indicates that the description of the attribute relating to one edit list has been completed. That is, the description of the edit list whose description is started on the 24th line in FIG. 9 is ended on the 1st line in FIG.
[0112]
In the second to fifth lines in FIG. 10, management information related to the edit list having the edit list ID “E0002” is described. The description contents are the same as those in the edit list with the edit list ID “E0001” described in the 24th line in FIG. 9 to the 1st line in FIG.
[0113]
In addition, the sixth to ninth lines in FIG. 10 describe management information related to the edit list having the edit list ID “E0003”. The description contents are the same as those in the edit list with the edit list ID “E0001” described in the 24th line in FIG. 9 to the 1st line in FIG.
[0114]
Furthermore, management information related to the edit list having the edit list ID “E0004” is described in the 10th to 13th lines in FIG. The description contents are the same as those in the edit list with the edit list ID “E0001” described in the 24th line in FIG. 9 to the 1st line in FIG.
[0115]
The description “</ editlistTable>” in the 14th paragraph of FIG. 10 is a description indicating the end of the description of the management information related to the edit list whose description starts from the 23rd line of FIG. 9.
[0116]
The description “</ indexFile>” on the 15th line in FIG. 10 is a description indicating the end of the description of the index file 41.
[0117]
As described above, the index file 41 describes the attributes (management information) of the data recorded on the optical disc 32.
[0118]
Next, FIG. 11 shows a description example of the disc information file 51.
[0119]
Of the description “<? Xml version =“ 1.0 ”encoding =“ UTF-8 ”?>” On the first line in FIG. 11, “xml version =“ 1.0 ”” indicates that the disc information file 51 This indicates that the document is an XML document. “Encoding =“ UTF-8 ”” represents that the character code is fixed to UTF-8. The description “<discinfo xmlns =“ urn: schema-professional Disc: discinfo ”” on the second line in FIG. 11 represents the namespace of the XML document. The description “<history>” on the third line in FIG. 11 indicates that the reproduction history is described in the following line.
[0120]
The description “<clip id =“ C0003 ”ftc =“ smpte-30-drop = 00: 30: 12: 23 ”/>” on the fourth line in FIG. The clip that was most recently played back was the clip with the clip ID “C0003”, indicating that playback was stopped when the time code was played up to “00: 30: 12: 23”.
[0121]
The description “<editlist id =“ E0001 ”ftc =“ smpte-30-drop = 00: 00: 00: 15 ”//>” on the fifth line in FIG. 11 is the edit list with the edit list ID “E0001” that is played back one time before the data described in the fourth line, and the time code is played back until “00: 00: 15: 15”. By the way, the reproduction is stopped.
[0122]
The description “<tape id =“ C0003 ”ftc =“ smpte-30-drop = 00: 02: 23: 12 ”//>” on the sixth line in FIG. 11 is the clip with the clip ID “C0003” that is played back one time before the data described in the fifth line of FIG. 11, and the time code is played back until “00: 02: 23: 12”. Indicates that playback has been stopped. Note that “tape” indicates that the clips with the clip IDs “C0001” to “C0003” are continuously reproduced in the order of recording.
[0123]
The description “<editlist id =” E0004 ”ftc =“ smpte-30-drop = 00: 00: 10: 02 ”/>” on the seventh line in FIG. 11 is the edit list with the edit list ID “E0004” that is played back immediately before the data described in the sixth line, and the time code is played back until “00: 00: 10: 02”. By the way, the reproduction is stopped.
[0124]
The description “<clip id =“ C0002 ”ftc =“ smpte-30-drop = 00: 01: 02: 03 ”/>” on the eighth line in FIG. 11 is the clip with the clip ID “C0002” that was played back before the data described in the seventh row, and when the time code was played back to “00: 01: 02: 03”. Indicates that playback has been stopped.
[0125]
The description “<clip id =“ C0004 ”ftc =“ smpte-30-drop = 00: 05: 43: 21 ”/>” on the ninth line in FIG. 11 is the clip with the clip ID “C0004” that was played back before the data described in the 8th row, and when the time code was played back to “00: 05: 43: 21”. Indicates that playback has been stopped.
[0126]
The description “</ history>” on the tenth line in FIG. 11 indicates the end of the description of the reproduction history.
[0127]
The description “</ discinfo>” on the eleventh line in FIG. 11 indicates the end of the description of the disc information file 51.
[0128]
Next, an index file update process by the recording / reproducing apparatus 1 in FIG. 1 will be described with reference to the flowcharts in FIGS.
[0129]
In step S <b> 201, the CPU 11 of the recording / reproducing apparatus 1 determines whether or not a shooting process has been performed and a new clip directory has been added to the clip root directory 204, and the new clip directory has been added to the clip root directory 204. If so, the process proceeds to step S202.
[0130]
In step S202, the index file management unit 19 adds management information (attributes) related to the newly created clip to the index file 41. In step S203, the index file management unit 19 acquires the current time from the clock unit 17 at the timing when the management information is added to the index file 41 in step S202, and uses this as the time stamp of the update date and time of the index file. Record in file 41.
[0131]
In step S <b> 204, the index file management unit 19 records the index file 41 whose time stamp has been updated in step S <b> 203 on the optical disc 32 via the drive 31. At this time, the index file 41 originally recorded on the optical disc 32 is deleted.
[0132]
Thereafter, the process proceeds to step S205, and the backup file creation unit 21 duplicates the index file 41 to which management information (attributes) related to the newly created clip is added by the index file management unit 19, and the backup file ( INDEX.BUP) 61 is created.
[0133]
In step S206, the backup file creation unit 21 acquires the current time from the clock unit 17 at the timing when the backup file 61 is created in step S205, and records this in the backup file 61 as a time stamp of the creation date and time of the backup file 61. To do.
[0134]
In step S <b> 207, the backup file creation unit 21 records the backup file 61 recorded with the time stamp in step S <b> 206 on the optical disc 32 via the drive 31. At this time, the backup file 61 originally recorded on the optical disc 32 is deleted.
[0135]
Thereafter, the processing proceeds to step S208 in FIG.
[0136]
If the CPU 11 determines in step S201 that a new clip directory has not been added to the clip root directory 204, the processing in steps S202 to S207 is skipped, and the processing proceeds to step S208 in FIG.
[0137]
In step S 208 of FIG. 13, the CPU 11 of the recording / playback apparatus 1 determines whether or not an editing process has been executed and a new edit list directory has been added to the edit list root directory 205, and a new one is added to the edit list root directory 205. If an edit list directory has been added, the process proceeds to step S209.
[0138]
In step S <b> 209, the index file management unit 19 adds management information (attributes) related to the newly created edit list to the index file 41. In step S210, the index file management unit 19 acquires the current time from the clock unit 17 at the timing when the management information (attribute) is added to the index file 41 in step S209, and uses this as the time stamp of the update date and time of the index file. Is recorded in the index file 41.
[0139]
In step S <b> 211, the index file management unit 19 records the index file 41 whose time stamp has been updated in step S <b> 210 on the optical disc 32 via the drive 31. At this time, the index file 41 originally recorded on the optical disc 32 is deleted.
[0140]
Thereafter, the process proceeds to step S212, and the backup file creation unit 21 duplicates the index file 41 to which management information (attributes) related to the newly created edit list is added by the index file management unit 19, and creates a backup file. (INDEX.BUP) 61 is created.
[0141]
In step S213, the backup file creation unit 21 acquires the current time from the clock unit 17 at the timing when the backup file 61 is created in step S212, and records this in the backup file 61 as a time stamp of the creation date and time of the backup file 61. To do.
[0142]
In step S <b> 214, the backup file creation unit 21 records the backup file 61 recorded with the time stamp in step S <b> 213 on the optical disc 32 via the drive 31. At this time, the backup file 61 originally recorded on the optical disc 32 is deleted.
[0143]
Thereafter, the process returns to step S201 in FIG. 12, and the processes after step S201 described above are repeated.
[0144]
If the CPU 11 of the recording / playback apparatus 1 determines in step S208 that a new edit list directory has not been added to the edit list root directory 205, the processing in steps S209 to S214 is skipped, and the processing is performed as shown in FIG. Returning to S201, the processing after step S201 described above is repeated.
[0145]
As described above, the index file update process of the recording / reproducing apparatus 1 in FIG. 1 is executed. As described above, by creating (updating) the backup file 61 after creating (updating) the index file 41, the time stamp of the backup file 61 may be set to a newer time than the index file 41. it can.
[0146]
Thus, by creating the backup file 61 of the index file 41 and recording it on the optical disc 32, even if the index file 41 is destroyed and the management information recorded in the index file 41 cannot be read out, The management information recorded in the backup file 61 can be read out and the recorded contents of the optical disc 32 can be acquired.
[0147]
By the way, the optical disk 32 in which the index file 41 and the backup file 61 are recorded in this way is mounted on the recording / reproducing apparatus 101 that does not create the backup file 61, and shooting and editing processes are performed. Is recorded, the management information of the index file 41 is updated, but the management information of the backup file 61 is not updated.
[0148]
The index file update process in such a case will be described with reference to the flowchart of FIG.
[0149]
In step S <b> 301, the CPU 111 of the recording / reproducing apparatus 101 determines whether or not a new clip directory has been added to the clip root directory 204 by performing shooting processing, and the new clip directory has been added to the clip root directory 204. If so, the process proceeds to step S302.
[0150]
In step S302, the index file management unit 119 adds management information (attributes) related to the newly created clip to the index file 41. In step S303, the index file management unit 119 acquires the current time from the clock unit 117 at the timing when information is added to the index file 41 in step S302, and uses this as the time stamp of the update date and time of the index file. 41.
[0151]
In step S <b> 304, the index file management unit 119 records the index file 41 whose time stamp has been updated in step S <b> 303 on the optical disc 32 via the drive 130. At this time, the index file 41 originally recorded on the optical disc 32 is deleted.
[0152]
Thereafter, the process proceeds to step S305.
[0153]
If the CPU 111 determines in step S301 that a new clip directory has not been added to the clip root directory 204, the processing in steps S302 to S304 is skipped, and the processing proceeds to step S305.
[0154]
In step S305, the CPU 111 of the recording / playback apparatus 101 determines whether or not an editing process has been executed and a new edit list directory has been added to the edit list root directory 205, and a new edit list directory has been added to the edit list root directory 205. If is added, the process proceeds to step S306.
[0155]
In step S306, the index file management unit 119 adds management information (attributes) related to the newly created edit list to the index file 41. In step S307, the index file management unit 119 acquires the current time from the clock unit 117 at the timing when the management information (attribute) is added to the index file 41 in step S306, and uses this as the time stamp of the update time of the index file. Is recorded in the index file 41.
[0156]
In step S 308, the index file management unit 119 records the index file 41 whose time stamp has been updated in step S 307 on the optical disc 32 via the drive 130. At this time, the index file 41 originally recorded on the optical disc 32 is deleted.
[0157]
Thereafter, the process returns to step S301, and the processes after step S301 described above are repeated.
[0158]
If the CPU 111 of the recording / playback apparatus 101 determines in step S305 that a new edit list directory has not been added to the edit list root directory 205, the processes in steps S306 to S308 are skipped, and the process returns to step S301. The processes after step S301 described above are repeated.
[0159]
As described above, the index file update processing of the recording / reproducing apparatus 101 in FIG. 2 is executed. As described above, in the recording / playback apparatus 101 of FIG. 2, even if the recording content of the index file 41 is updated, the recording content of the backup file 61 is not updated. Therefore, the time stamp of the index file 41 is updated, but the time stamp of the backup file 61 is not updated. As a result, the update date and time of the index file 41 is newer than the update date and time of the backup file 61.
[0160]
Next, an index file selection process of the recording / reproducing apparatus 1 of FIG. 1, that is, a process when the optical disc 32 is mounted on the recording / reproducing apparatus 1 of FIG. 1 will be described with reference to the flowchart of FIG.
[0161]
When the optical disc 32 is loaded in the drive 31, the index file management unit 19 reads the index file 41 from the optical disc 32 via the drive 31 in step S 401.
[0162]
In step S402, the index file management unit 19 determines whether the management information recorded in the index file 41 read out in step S401 can be normally interpreted, and the management information recorded in the index file 41. Is normally interpretable, the process proceeds to step S403. Note that “normally interpretable” means that all of the description contents related to attributes such as clips and edit lists can be normally read from the management information recorded in the index file 41.
[0163]
In step S403, the index file management unit 19 specifies the recording contents of the optical disc 32 based on the index file 41 read out in step S401, and the CPU 11 determines the optical disc based on the management information of the index file 41. A process of reading AV data recorded in the memory 32 or writing new AV data on the optical disk 32 is executed.
[0164]
In step S402, when the index file management unit 19 determines that the management information recorded in the index file 41 read out in step S401 cannot be normally interpreted, the process proceeds to step S404.
[0165]
In step S <b> 404, the index file management unit 19 searches whether a backup file (INDEX.BUP) 61 is recorded under the PROAV directory 202.
[0166]
In step S405, the index file management unit 19 determines whether the backup file 61 is recorded under the PROAV directory 202. If the backup file 61 is not recorded under the PROAV directory 202, the process proceeds to step S406. move on.
[0167]
In step S <b> 406, the CPU 11 displays a guidance (error screen) indicating that the management information on the optical disc 32 could not be read on the display unit 24.
[0168]
If the index file management unit 19 determines in step S405 that the backup file 61 is recorded under the PROAV directory 202, the process proceeds to step S407.
[0169]
In step S407, the file selecting unit 16 compares the time stamp of the index file 41 read in step S401 with the backup file 61 searched in step S406. That is, as described above, in the recording / reproducing apparatus 1 of FIG. 1, the backup file 61 is created by duplicating the index file 41 after the index file 41 is created. Is always newer than the time stamp of the index file 41. On the other hand, in the recording / reproducing apparatus 1 of FIG. 2, since the content of the backup file 61 is not updated, only the index file 41 is updated when the recorded content of the optical disc 32 is changed. The time stamp of the index file 41 becomes newer than the time stamp of the backup file 61.
[0170]
Therefore, by comparing the time stamp of the index file 41 and the time stamp of the backup file 61, it is determined whether or not the management information recorded in the backup file 61 is a copy of the latest index file 41. Can do. That is, if the time stamp of the index file 41 is older than the time stamp of the backup file 61, the backup file 61 is a copy of the latest index file 41, and the time stamp of the index file 41 is that of the backup file 61. If it is newer than the time stamp, the backup file 61 is not a copy of the latest index file 41.
[0171]
Therefore, in step S408 of FIG. 15, the file selection unit 16 determines whether or not the time stamp of the index file 41 is newer than the time stamp of the backup file 61, and the time stamp of the index file 41 is that of the backup file 61. If it is newer than the time stamp, the backup file 61 is not a copy of the latest index file 41, and the process advances to step S409.
[0172]
In step S409, the CPU 11 causes the display unit 24 to display a guide prompting the user whether to interpret the management information recorded in the backup file 61. That is, since the backup file 61 is not a copy of the latest index file 41, it does not completely match the data recorded on the optical disc 32, but may partially match. Therefore, there is a possibility that AV data or the like can be read from the optical disc 32 based on the management information of the backup file 61. Therefore, by causing the user to select whether or not to interpret the backup file 61, data loss can be reduced. The user can instruct whether or not to interpret the backup file 61 by operating the operation unit 23.
[0173]
In step S <b> 410, the CPU 11 determines whether or not a command for executing the interpretation of the backup file 61 is input from the user based on the operation signal from the operation unit 23, and the command for executing the interpretation of the backup file 61 is received. If not input (when a command not to execute interpretation of the backup file 61 is input), the process proceeds to step S411.
[0174]
In step S411, the CPU 11 causes the display unit 24 to display a guidance (error screen) indicating that data cannot be read from the optical disc 32.
[0175]
If the CPU 11 determines in step S410 that an instruction to execute interpretation of the backup file 61 has been input, the process proceeds to step S412.
[0176]
In step S408, the file selection unit 16 determines that the time stamp of the index file 41 is not newer than the time stamp of the backup file 61 (the time stamp of the index file 41 is the same time as or older than the time stamp of the backup file 61). ), Since the backup file 61 is a copy of the latest index file 41, the processing from step S409 to step S410 is skipped, and the processing proceeds to step S412.
[0177]
In step S <b> 412, the index file management unit 19 estimates the recording contents of the optical disc 32 based on the management information recorded in the backup file 61, and the CPU 11 operates based on the management information recorded in the backup file 61. According to the operation input to the unit 23, the AV data and the like are read from the optical disc 32 and the AV data and the like are recorded on the optical disc 32.
[0178]
As described above, the index file selection process of the recording / reproducing apparatus 1 is executed.
[0179]
As described above, according to the recording / playback apparatus 1 to which the present invention is applied, the backup file 61 is a copy of the latest index file 41 by comparing the update date and time of the index file 41 and the backup file 61. It is possible to determine whether or not. Therefore, if the index file 41 is destroyed and cannot be normally interpreted, it is determined whether or not the backup file 61 can be interpreted by comparing the time stamps of the index file 41 and the backup file 61. It becomes possible to do.
[0180]
Further, even when the time stamp of the index file 41 is newer than the time stamp of the backup file 61, the user can determine whether or not to interpret the backup file 61, so that the user can destroy the index file 41. However, there is a possibility of partially recovering data.
[0181]
In the process of the flowchart of FIG. 15, if it is determined in step S408 that the time stamp of the index file 41 is newer than the time stamp of the backup file 61, whether or not the backup file 61 is interpreted in step S409. However, if the time stamp of the index file 41 is determined to be newer than the time stamp of the backup file 61, an error screen is immediately displayed on the display unit 24. Anyway.
[0182]
FIG. 16 shows a flowchart of index file selection processing in such a case.
[0183]
That is, in FIG. 16, the processing from step S451 to step S457 is the same as the processing from step S401 to step S407 in FIG.
[0184]
In FIG. 16, in step S <b> 458, the file selection unit 16 determines whether or not the time stamp of the index file 41 is newer than the time stamp of the backup file 61. If it is newer than the time stamp, the process proceeds to step S459, and the CPU 11 causes the display unit 24 to display a guide (error screen) indicating that the data on the optical disc 32 cannot be read. In step S458, if the file selection unit 16 determines that the time stamp of the index file 41 is not newer than the time stamp of the backup file 61, the process proceeds to step S460, and the index file management unit 19 determines that the backup file 61 The management information recorded in the above is interpreted, and data is read from and written to the optical disk 32.
[0185]
You may do it above.
[0186]
In the above description, the case where data such as image data, audio data, low resolution data, frame metadata, clip metadata, and edit list is recorded on the optical disc has been described. For example, the optical disk is not limited to an optical disk, and may be a magneto-optical disk, a magnetic disk such as a flexible disk or a hard disk, a magnetic tape, or a semiconductor memory such as a flash memory.
[0187]
Further, the case where the index file selection process is performed in the recording / reproducing apparatus 1 has been described above. However, the information processing apparatus that performs the index file selection process is not limited to this, and for example, the recording / reproducing apparatus 101 in FIG. Or an information processing apparatus other than that.
[0188]
Furthermore, in the above description, the recording / reproducing apparatus has been described as an example. However, the recording / reproducing apparatus is not limited to being integrated, and may be separated into a recording apparatus and a reproducing apparatus.
[0189]
The series of processes described above can be executed by hardware, or can be executed by software as described above. When a series of processing is executed by software, various functions can be executed by installing a computer in which the programs that make up the software are installed in dedicated hardware, or by installing various programs. For example, it is installed from a recording medium or the like into a general-purpose personal computer or the like.
[0190]
As shown in FIG. 1, the recording medium is distributed to provide a program to the user separately from the recording / reproducing apparatus 1, and a magnetic disk (including a flexible disk) on which the program is recorded, an optical disk (CD) -Removable media including package media composed of ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), magneto-optical disk (MD (Mini-Disc) (including registered trademark)), or semiconductor memory In addition to the medium 30, the medium 30 is configured by a ROM 12 storing a program and a hard disk including the storage unit 27 provided to the user in a state of being incorporated in a computer in advance.
[0191]
In this specification, the steps for describing the program provided by the medium are performed in parallel or individually in accordance with the described order, as well as the processing performed in time series, not necessarily in time series. The process to be executed is also included.
[0192]
Further, in this specification, the system represents the entire apparatus constituted by a plurality of apparatuses.
[0193]
【The invention's effect】
As described above, according to the present invention, image data, audio data, and the like can be recorded on a recording medium. In particular, management information for managing the recording contents of the recording medium can be held more safely. In addition, it is possible to prevent misidentification of the recorded contents of the recording medium.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of a recording / reproducing apparatus to which the present invention is applied.
FIG. 2 is a block diagram showing a configuration example of a recording / reproducing apparatus different from the recording / reproducing apparatus of FIG. 1;
3 is a diagram showing an example of a directory structure for managing data recorded on the optical disc of FIG. 1. FIG.
4 is a diagram showing a more detailed configuration example of the directory structure shown in FIG. 3; FIG.
FIG. 5 is a diagram showing a more detailed configuration example of the directory structure shown in FIG. 3;
FIG. 6 is a flowchart illustrating format processing.
FIG. 7 is a diagram illustrating a description example of an index file.
FIG. 8 is a diagram subsequent to FIG. 7, showing an example of description of an index file.
FIG. 9 is a diagram subsequent to FIG. 8, illustrating an example description of an index file.
FIG. 10 is a diagram subsequent to FIG. 9 showing a description example of an index file.
FIG. 11 is a diagram illustrating a description example of a disc information file.
12 is a flowchart for explaining index file update processing of the recording / reproducing apparatus of FIG. 1; FIG.
13 is a flowchart subsequent to FIG. 12 for explaining the index file update processing of the recording / reproducing apparatus of FIG. 1;
14 is a flowchart for explaining index file update processing of the recording / reproducing apparatus of FIG. 2; FIG.
15 is a flowchart for explaining index file selection processing of the recording / reproducing apparatus in FIG. 1. FIG.
FIG. 16 is another flowchart for explaining the index file selection process of the recording / reproducing apparatus of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus, 11 CPU, 12 ROM, 13 RAM, 14 Clip management part, 15 Edit list management part, 16 File selection part, 17 Clock part, 19 Index file management part, 20 Disc information file management part, 21 Backup file Creation unit, 23 operation unit, 24 display unit, 31 drive, 32 optical disk, 41 index file, 61 backup file, 101 recording / playback device, 204 clip root directory, 205 edit root directory, 211 to 213 clip directory, 214 to 217 edit List directory

Claims (8)

Creation means for creating a backup file of the management information file after the management information file for managing the data recorded on the recording medium is created;
Control of recording of the management information file to which the time information indicating the creation date and time of the management information file is added to the recording medium, and the backup file to which the time information indicating the creation date and time of the backup file is added. An information processing apparatus comprising: a recording control unit that controls recording on the recording medium. A first recording control step for controlling recording of the management information file for managing data recorded on the recording medium, to which the time information indicating the creation date and time is added to the recording medium When,
A creation step of creating a backup file of the management information file after the management information file is created;
And a second recording control step for controlling recording of the backup file to which the time information indicating the creation date is added to the recording medium. A first recording control step for controlling recording of the management information file for managing data recorded on the recording medium, to which the time information indicating the creation date and time is added to the recording medium When,
A creation step of creating a backup file of the management information file after the management information file is created;
And a second recording control step for controlling recording of the backup file to which the time information indicating the creation date is added to the recording medium. A recording medium on which a computer-readable program is recorded . A first recording control step for controlling recording of the management information file for managing data recorded on the recording medium, to which the time information indicating the creation date and time is added to the recording medium When,
A creation step of creating a backup file of the management information file after the management information file is created;
A program for causing a computer to execute a second recording control step for controlling recording of the backup file to which time information indicating creation date and time is added to the recording medium. In an information processing apparatus for reading data from the recording medium based on a management information file recorded on the recording medium together with the data in order to manage data recorded on the recording medium.
Comparing the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file, the backup file is based on the latest management information file Determining means for determining whether or not it is created by,
An information processing apparatus comprising: a control unit that controls execution of reference to management information recorded in the backup file according to a determination result by the determination unit. In an information processing method of an information processing apparatus for reading data from the recording medium based on a management information file recorded on the recording medium together with the data in order to manage data recorded on the recording medium,
By comparing the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file, the backup file is based on the latest management information file. A determination step for determining whether or not it has been created,
And a control step for controlling execution of reference to the management information recorded in the backup file according to a determination result obtained by the determination step. A program for an information processing apparatus that reads the data from the recording medium based on a management information file recorded on the recording medium together with the data in order to manage the data recorded on the recording medium,
By comparing the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file, the backup file is based on the latest management information file. A determination step for determining whether or not it has been created,
And a control step for controlling execution of reference to the management information recorded in the backup file in accordance with a determination result obtained by the determination step. A recording medium on which a computer-readable program is recorded. In order to manage data recorded on a recording medium, based on a management information file recorded on the recording medium together with the data, a computer that executes a process of reading the data from the recording medium,
By comparing the creation date and time of the management information file and the creation date and time of the backup file of the management information file recorded on the recording medium together with the management information file, the backup file is based on the latest management information file. A determination step for determining whether or not it has been created,
And a control step for controlling execution of reference to management information recorded in the backup file according to a determination result obtained by the determination step.

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