JP2005243058A - Information processor, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate reproduction processing by improving convenience of a recording medium. <P>SOLUTION: In a figure 21A, a status of a disk information file before update recorded in a disk is shown. In a non real time area, the disk information file D1 before update is recorded and in an inner periphery side fs recording area, management information fs1 which manages a record position etc. of the file D1 before update in a file recording area is recorded. In a figure 21D, the status of the disk information file updated with an overwrite mode is indicated. In this case, since an updated file D2 is recorded on the file D1 before update by the overwrite mode, the management information of the inner periphery side fs recording area 141 will not be updated and remains fs1. This invention can be applied to a disk recording and reproducing apparatus for example. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information processing device and method, and a program, and more particularly, to an information processing device and method, and a program that can perform, for example, reproduction processing more easily.

  Conventionally, material data such as image data and audio data obtained by imaging or recording has been recorded on a tape medium such as a video tape as a recording medium. That is, when the user moves the material data from the first device to the second device, the material data is moved via the tape medium.

  In such a tape medium, the material data is usually recorded along the time axis with the longitudinal direction of the tape as the time axis. Therefore, for example, the reproduction of the material data is stopped in the first device during the reproduction of the material data (at a position in the middle of the material data), and the reproduction of the material data is resumed from the reproduction stop position in the second device. In some cases, the tape medium has physically recorded its playback stop position (as position information). That is, when the reproduction is stopped, the tape feeding of the tape medium is also stopped and the position is maintained (as the reproduction stop position). Therefore, when such a tape medium is directly attached to the drive of the second apparatus, the second apparatus starts reproduction from the position of the tape medium (that is, the reproduction stop position in the first apparatus). Can do.

  Usually, the editing operation is performed while referring to the reproduced material data, and thus the above-described processing is also performed when editing the material data. For example, even when the editing process is interrupted during the editing work in the first device and the editing work is resumed in the second device, the playback stop position is maintained as described above. In the second apparatus, the editing operation can be resumed from the position where the editing process was interrupted in the first apparatus.

  However, in recent years, with the improvement of information processing technology, information has been digitized and disk media such as DVD (Digital Versatile Disc) have been used as recording media. In the case of tape media, the position of the magnetic head of the device that reads information is fixed, but in the case of such a disk, the position of the pickup of the device that reads information on the disc is moved (for example, , See Patent Document 1).

Japanese Patent Application Laid-Open No. 11-136431

  Therefore, as described above, when playback is interrupted and moved to another device, the disk on which the material data is recorded does not record the previous playback stop position, and playback is performed only from the beginning of the material data. There was a problem that it was not possible. Accordingly, in the case of editing work, there is also a problem that the position where the previous editing is interrupted cannot be known.

  The present invention has been made in view of such a situation, and is intended to improve the convenience of a recording medium, such as enabling reproduction processing more easily.

  The information processing apparatus according to the present invention includes a reproducing unit that reads and reproduces predetermined data recorded on a recording medium, a creating unit that sequentially creates history information of data reproduction by the reproducing unit, and a history created by the creating unit A recording unit that overwrites and records the information as one file on a recording medium; and a reading unit that reads history information recorded by the recording unit; and the reproducing unit is based on the history information read by the reading unit, A data reproduction start position is determined, and data is read from the reproduction start position and reproduced.

  The creation means can sequentially create history information of data reproduction by the reproduction means without changing attribute data including at least one of a data size and a file name or creation date and time.

  The information processing apparatus of the present invention may further include a holding unit that holds management information including a recording position of a file recorded on the recording medium, and the history information created by the creating unit is recorded as one file. When overwritten and recorded, the management information held by the holding means can be prevented from being updated.

  The data may include at least one of image data, audio data, and metadata added to the image data.

  The information processing method of the present invention includes a reproduction step for reading out and reproducing predetermined data recorded on a recording medium, a creation step for sequentially creating data reproduction history information by the processing of the reproduction step, and processing of the creation step A recording step of overwriting and recording the created history information as one file on a recording medium, and a reading step of reading out the history information recorded in the recording step processing, and the reproduction step is read out in the processing of the reading step Based on the recorded history information, a data reproduction start position is determined, and data is read from the reproduction start position and reproduced.

  The program of the present invention is created by a reproduction step for reading out and reproducing predetermined data recorded on a recording medium, a creation step for sequentially creating data reproduction history information by the process of the reproduction step, and a process of the creation step. Including a recording step for overwriting and recording the recorded history information as one file on a recording medium, and a reading step for reading the history information recorded in the recording step process. The reproduction step is read out in the reading step process. Based on the history information, a reproduction start position of data is determined, and the computer is caused to execute a process characterized by reading and reproducing data from the reproduction start position.

  In the information processing apparatus, method, and program of the present invention, history information of data reproduction is sequentially created, and the created history information is overwritten and recorded on a recording medium as one file.

  According to the present invention, it is possible to improve the convenience of the recording medium, such as enabling reproduction processing more easily.

  Further, according to the present invention, it is possible to suppress the deterioration of the recording medium. Furthermore, the unmount time of the recording medium can be shortened.

  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.

  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. It does not deny the existence of an invention that is added by correction.

  The information processing apparatus (for example, the recording / reproducing apparatus 1 in FIG. 1) according to claim 1 reads out and reproduces predetermined data recorded on a recording medium (for example, the disc 32 in FIG. 1) (for example, 1), creation means (for example, disc information file creation unit 81 in FIG. 4) for sequentially creating history information (for example, disc information) of data reproduction by the playback means, and creation means. Recording means (for example, the recording control unit 16 in FIG. 1) overwriting the recorded history information as one file on a recording medium, and reading means (for example, the disc in FIG. 3) for reading the history information recorded by the recording means. An information reading unit 62), and the reproducing means is based on the history information read by the reading means. Determining a playback start position of the data, characterized by reading out and reproducing data from the playback start position.

  The information processing apparatus according to claim 3 is a holding unit (for example, the file system 112 of FIG. 5) that holds management information (for example, the management information 153 of FIG. 6) including the recording position of the file recorded on the recording medium. The management information held by the holding unit is not updated when the history information created by the creating unit is overwritten and recorded on the recording medium as one file.

  The information processing method according to claim 5 includes a reproduction step (for example, step S75 in FIG. 14) for reading and reproducing predetermined data recorded on a recording medium (for example, the disk 32 in FIG. 1), and a reproduction step. A creation step (for example, step S172 in FIG. 19) for sequentially creating history information (for example, disc information) of data reproduction by processing, and the history information created by the processing of the creation step as one file on a recording medium. The recording step (for example, step S196 in FIG. 20) for overwriting and the reading step (for example, step S32 in FIG. 12) for reading the history information recorded in the processing of the recording step are included. Based on the history information read in the process, the playback start position of the data is determined and playback starts. Wherein the reading and reproducing placed data from.

  The correspondence between the configuration requirements described in the claims of the program of the present invention and the specific examples in the embodiment of the present invention is the same as that of the information processing method of the present invention described above, so that description thereof is omitted. To do.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration example of a recording / reproducing apparatus to which the present invention is applied. In FIG. 1, a CPU (Central Processing Unit) 11 of the recording / reproducing apparatus 1 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.

  The information holding unit 14 is a storage unit that is configured by a semiconductor memory or the like and temporarily stores information. The information holding unit 14 holds information about material data recorded on the disk 32 that is read from the disk 32 to be described later. Then, it is controlled by the reproduction control unit 15 and the recording control unit 16 and the like, and the held information is provided or new information is acquired.

  The reproduction control unit 15 controls the drive 26 via the bus 17 and the input / output interface 20 and performs processing for controlling reading of various information from the disk 32 mounted on the drive 26. For example, the reproduction control unit 15 reads out information related to data recorded on the disc 32 and executes a control process for causing the information holding unit 14 to supply the information. The recording control unit 16 controls the drive 26 via the bus 17 and the input / output interface 20 and performs processing for controlling writing of various information to the disk 32 mounted on the drive 26. For example, the recording control unit 16 executes a control process for recording the data held in the information holding unit 14 on the disk 32.

  The CPU 11, ROM 12, RAM 13, information holding unit 14, playback control unit 15, and recording control unit 16 are connected to each other via a bus 17. An input / output interface 20 is also connected to the bus 17.

  The input / output interface 20 is connected to an input unit 21 including a keyboard and a mouse, and outputs a signal input to the input unit 21 to the CPU 11. The input / output interface 20 is also connected to an output unit 22 including a display and a speaker.

  Further, the input / output interface 20 performs data communication with other devices via a storage unit 23 including a hard disk, an EEPROM (Electronically Erasable and Programmable Read Only Memory), and a wired or wireless network. A communication unit 24 is also connected. The drive 25 is used when reading a program or data necessary for executing the program from a removable medium 31 formed of a recording medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, and writing data or a program. It is done.

  The drive 26 reads material data such as image data and audio data from the disk 32 mounted on the drive 26, and records the material data on the disk 32 mounted on the drive 26.

  The 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 disc 32 may be other recording media, such as a DVD-RAM (Digital Versatile Disc-Random Access Memory), a DVD-R (DVD-Recordable), a DVD-RW (DVD-ReWritable), Various optical disks such as DVD + R (DVD + Recordable), DVD + RW (DVD + ReWritable), CD-R (Compact Disc-Recordable), or CD-RW (CD-ReWritable) may be used.

  FIG. 2 is a block diagram illustrating a detailed configuration example of the information holding unit 14 of FIG. In FIG. 2, the information holding unit 14 includes an index file holding unit 51 that holds an index file for managing information (various information described later with reference to FIGS. 12 to 14) recorded on the disk 32, and the disk. 32 has a disc information file holding unit 52 for holding a disc information file including a reproduction history of image data and audio data recorded in 32. The information holding unit 14 can also hold information other than those described above.

  FIG. 3 is a block diagram illustrating a detailed configuration example of the reproduction control unit 15 of FIG. In FIG. 3, the playback control unit 15 reads the index file from the disk 32 mounted on the drive 26, and loads the index file reading unit 61 and the drive 26 that execute the process of storing the index file in the index file holding unit 51 of FIG. 2. The disc information file is read from the disc 32 and is stored in the disc information file holding unit 52 in FIG. 2. The disc information file reading unit 62 reads the disc information file and holds it in the disc information file holding unit 52. A disk information file management unit 63 that performs processing for managing the held disk information file is provided.

  The reproduction control unit 15 controls the drive 26 to read out and reproduce material data such as image data and audio data from the disk 32 mounted on the drive 26, and executes an index file reading unit 61 and a disk information file. Data other than material data is read using the reading unit 62 or the like, and those data read and held are managed using the disc information file management unit 63 or the like.

  FIG. 4 is a block diagram illustrating a detailed configuration example of the recording control unit 16 of FIG. In FIG. 4, the recording control unit 16 includes an index file creation unit 71 that performs processing for creating an index file, an index file management unit 72 that manages an index file held in the index file holding unit 51, and an index file holding unit 51. An index file recording control unit 73 that records the index file held in the disk 26 mounted on the drive 26, a disc information file creation unit 81 that creates a disc information file and holds the disc information file in the disc information file holding unit 52, and , A disc information file for executing a process of recording the disc information file held in the disc information file holding unit 52 on the disc 32. And a Deployment file recording control unit 82.

  The recording control unit 16 controls the drive 26 to execute processing for recording material data such as image data and audio data on the disk 32 mounted on the drive 26, and creates an index file in the index file creation unit 71. The index file management unit 72 manages the index file held in the index file holding unit 51, and records the index file held in the index file holding unit 51 on the disk 32 via the drive 26. Execute the process.

  The relationship between the functions of the units described with reference to FIGS. 2 to 4 will be described with reference to the functional block diagram of FIG.

  The index processing unit 101 that performs processing related to the index file includes an index file holding unit 51, an index file reading unit 61, an index file creation unit 71, an index file management unit 72, and an index file recording control unit 73.

  For example, when the disk formatting process 122 is executed and the formatting process of the disk 32 is started, the index file creating unit 71 creates an index file that is management information of a file recorded on the disk 32. The created index file is supplied to the index file recording control unit 73 via the index file holding unit 51 and is recorded on the disk 32 mounted on the drive 26.

  When the disc 32 on which image data, audio data, etc. are recorded is loaded in the drive 26, the index file reading unit 61 reads the index file from the disc 32 and causes the index file holding unit 51 to hold it.

  When the clip / edit list update process 121 for updating the image data and audio data recorded on the disk 32 is executed, the index file management unit 72 holds the index file holding unit 51 in accordance with the update. Manage and update index files that are stored. Then, the index file recording control unit 73 reads the updated index file from the index file holding unit 51 and records it on the disk 32.

  Note that a clip is a unit of the number of times of imaging processing. In addition, the clip indicates a unit indicating the time from the start of imaging to the end of imaging of the imaging process, a unit indicating the length of various data obtained by the imaging process, or the imaging A unit indicating the data amount of various data obtained by processing is indicated. Furthermore, the clip may also indicate the collection of various data itself.

  The disc information processing unit 111 that performs processing related to the disc information file includes a disc information file holding unit 52, a disc information file reading unit 62, a disc information file creation unit 81, a disc information file management unit 63, and a disc information file recording control unit 82. Consists of.

  For example, when the disk formatting process 122 is executed and the formatting process of the disk 32 is started, the disk information file creation unit 81 includes disk information including a reproduction history of material data such as image data and audio data recorded on the disk 32. Create a file. The created disc information file is supplied to the disc information file recording control unit 82 via the disc information file holding unit 52 and recorded on the disc 32 mounted on the drive 26.

  When the disc 32 on which image data, audio data, etc. are recorded is loaded in the drive 26, the disc information file reading unit 62 reads the disc information file from the disc 32 and holds it in the disc information file holding unit 52.

  When the reproduction process 123 for reproducing the material data recorded on the disc 32 is executed, the reproduction control unit 15 refers to the reproduction history of the disc information file held in the disc information file holding unit 52, and The reproduction of the material data is started from the position based on the reproduction history. When the reproduction process is completed, the disc information file management unit 63 updates the reproduction history of the disc information file held in the disc information file holding unit 52. The disc information file recording control unit 82 reads the updated disc information file from the disc information file holding unit 52 and records it on the disc 32.

  Further, when the disc 32 is ejected from the drive 26, the disc information file recording control unit 82 reads the disc information file held in the disc information file holding unit 52 and records it on the disc 32.

  As described above, in response to each operation instruction, each unit corresponding to each instruction performs processing in cooperation with each other, whereby the instructed operation is performed.

  At this time, as described above, the disc information file in which the reproduction history is recorded is updated in the process (reproduction process 123) when the material data is reproduced (at the end of reproduction). On the other hand, the index file, which is the management information of the file recorded on the disk 32, is used as a material in the process when updating the image data and audio data recorded on the disk 32 (clip / edit list update process 121). Updated with files containing data. That is, the reproduction history (disc information file) is updated when various material data is reproduced, and the update timing is different from the management information (index file) or the like that is updated when the material data is recorded.

  Furthermore, the material data edited once is often reproduced many times, and the number of reproduction processes is larger than the number of editing processes. Further, since the editing process is performed while referring to the reproduced material data, the material data reproduction process is not only performed for reproduction only for the purpose of reproduction, but also when editing the material data (during recording), etc. Is also executed. That is, in normal cases, the reproduction process is performed more frequently than the recording process.

  Therefore, as described above, by managing the reproduction history as a disc information file as a file different from other information such as management information of the file recorded on the disc 32, the recording / reproducing apparatus 1 in FIG. When updating the playback history, only the disc information file needs to be updated, so there is no need to update other information that does not need to be updated, and it is possible to prevent other information from being accidentally destroyed during the update. Can do.

  Further, since only the playback history is managed as an independent file, the recording / playback apparatus 1 in FIG. 1 can reduce the amount of data to be updated when the playback history is updated, and can reduce the load and processing time of the update process. Can do. In other words, compared to the case where the playback history is recorded in the same file as other information, it is possible to reduce resources such as the amount of memory required for the update processing of the playback history. Cost can be reduced.

  By the way, in order to perform processing for recording and reading an index file, a disc information file, and other audio and video files on the disc 32, as shown in FIG. 5, the index processing unit 101 and disc information processing are performed. The file system 112 is interposed between the index processing unit 101 and the disk information processing unit 111 and the disk 32 as the existence of a basic hierarchy than the unit 111.

  The file system 112 conforms to, for example, UDF (Universal Disk Format). As shown in FIG. 6, the file system 112 is provided with an inner circumference FS recording area 141, a file recording area 142, and an outer circumference FS recording area 142 in order from the inner circumference side on the disk 32, and is recorded on the disc 32. Manage your files.

  The inner periphery side FS recording area 141 is information indicating what kind of file is recorded in the file recording area 142, and management information (fs; file) that is referred to when the file is read from the disk 32. structure) 153 is recorded. The management information 153 is updated when a file is recorded in the file recording area 142, when the recorded file is updated, or when the recorded file is deleted.

  The process of updating the management information 153 recorded in the inner circumference FS recording area 141 is performed by cyclic recording. This process is described as a file system write back. Note that the file system write-back does not occur only when the file recorded in the file recording area 142 is updated in the overwrite mode. Here, the overwrite mode refers to writing an updated file in which the data size has not changed and the attribute data such as the file name and date / time has not been changed at the position where the file before the update is recorded. Point to.

  In the UDF standard, the management information 153 is also referred to as metadata corresponding to the file system 112.

  Here, for example, when the management information 153 in the inner circumference FS recording area 141 is updated, the cyclic recording does not overwrite the position on the disk 32 where the management information 153 before the update is recorded, This refers to a method of recording the updated information at a shifted position so that the updated management information 153 is written in an empty position in the circumferential FS recording area 141 and then the management information 153 before the update is deleted. . By cyclically recording the management information 153, the durability of the inner circumference FS recording area 141 due to the update of the management information 153 is reduced compared to the case where the management information 153 is overwritten instead of the cyclic recording (the number of rewrites). Rise) can be deterred.

  Further, the inner peripheral FS recording area 141 includes a USB (Unallocated Space Bitmap) 151 indicating empty areas in the inner peripheral FS recording area 141, the file recording area 142, and the outer peripheral FS recording area 143, and management information 153. An MD (Metadata Bitmap) 152 indicating a free area is recorded.

  The file recording area 142 is further divided into a non-real time (NRT) area 161 and a real time (RT) area 162. In the non-real-time area 161, non-real-time files such as index files and disc information files that do not require real-time properties are recorded. In the real-time area 162, real-time files such as audio and video that require real-time properties are recorded.

  The same management information (fs) 171 as the management information 153 recorded in the inner peripheral FS recording area 141 is recorded in the outer peripheral FS recording area 143. When the management information 171 is updated, cyclic recording is performed in the empty area 172 of the outer peripheral FS recording area 143. The management information 171 is also referred to as a metadata mirror corresponding to the file system 112 in the UDF standard.

  Thus, by recording the management information 153 in the inner circumference FS recording area 141 and recording the same management information 171 in the outer circumference FS recording area 143, it is assumed that either the management information 153 or the management information 171 is stored. Even if the disk 32 cannot be read due to scratches or dirt on the disk 32, there is a possibility that the other can be referred to, so that various files recorded in the file recording area 142 cannot be read. Can be deterred.

  The file system 112 may be any file system that can be supported by the recording / reproducing apparatus 1, such as ISO9660 (International Organization for Standardization 9660), in addition to the UDF. When a magnetic disk such as a hard disk is used instead of the disk 32, the file system is FAT (File Allocation Tables), NTFS (New Technology File System), HFS (Hierarchical File System), or UFS (Unix (registered trademark)). ) System) etc. may be used. A dedicated file system may be used.

  Next, a specific flow of each process described above will be described.

  For example, when the user operates the input unit 21 to instruct the execution of the formatting process of the disc 32 mounted on the drive 26, each unit of the recording / reproducing apparatus 1 in FIG. 1 starts the disc formatting process. .

  The disk formatting process will be described with reference to the flowchart of FIG.

  First, in step S <b> 11, the recording control unit 16 performs UDF format processing on the disk 32 mounted on the drive 26, and performs logical format processing using UDF. Next, the recording control unit 16 advances the processing to step S12, creates a ProAV directory under the root directory in the disk 32 based on the UDF, and records it on the disk 32. In step S13, the image data and audio are recorded. A clip root directory containing material data such as data and information related to the material data is created under the ProAV directory and recorded on the disk 32. In step S14, the material stored under the clip root directory An edit list root directory that stores editing results (editing information) obtained by nondestructively editing clips that are file groups such as data is created under the ProAV directory and recorded on the disc 32.

  In step S <b> 15, the index file creation unit 71 of the recording control unit 16 creates an index file using XML (eXtensible Markup Language) and causes the index file holding unit 51 to hold the index file. Then, the index file recording control unit 73 records the index file held in the index file holding unit 51 on the disk 32, and proceeds to step S16.

  In step S <b> 16, the disc information file creation unit 81 of the recording control unit 16 creates a disc information file using XML and causes the disc information file holding unit 52 to hold the disc information file. Then, the disc information file recording control unit 82 records the disc information file held in the disc information file holding unit 52 on the disc 32, and ends the disc formatting process.

  By performing the disc formatting process as described above, the reproduction history can be managed as a disc information file and as a file different from other information such as management information of a file recorded on the disc 32. FIG. The recording / reproducing apparatus 1 only needs to update the disc information file when updating the reproduction history, and it is possible to suppress accidental destruction of other information that does not need to be updated. .

  Further, since only the playback history is managed as an independent file, the recording / playback apparatus 1 in FIG. 1 can reduce the amount of data to be updated when the playback history is updated, and can reduce the load and processing time of the update process. Can do. In other words, compared to the case where the playback history is recorded in the same file as other information, it is possible to reduce resources such as the amount of memory required for the update processing of the playback history. Cost can be reduced.

  Next, FIG. 8 shows a specific description example of the disc information file. In the figure, the numbers at the beginning of each line are added for convenience of explanation and are not part of the XML description.

  The disc information file is a file for managing the reproduction history of material data such as clips and edit lists recorded in the disc 32. Such a reproduction history is described between the start tag on the second line and the end tag on the eleventh line in FIG.

  For example, the fourth line describes that clip designated reproduction, which is reproduction in clip units, has been performed, and the reproduction end position (frame number of image data). That is, in this case, it is indicated that the clip “C0003” has stopped at the position (frame) of “00: 30: 12: 23”. Note that “00: 30: 12: 23” is a time code (FTC: File Time Code) for each clip, and the time when the first frame (first frame) of the clip is “00:00:00”. Code. That is, in the case of FIG. 8, the clip “C0003” is stopped at the 30th, 12 seconds, and the 23rd frame from the top frame.

The fifth line describes that the edit list designated reproduction, which is reproduction in edit list units, has been performed, and describes the end position (frame number) of the reproduction. That is, in this case, it is indicated that the edit list “E0001” has stopped at the position (frame) of “00: 00: 00: 15”. Since the edit list is a clip editing result, it may correspond to a plurality of clips. In this case, in the edit list designation reproduction, a plurality of (a part of) the clips are reproduced. However, the FTC recorded as the playback history is a time code with the editing result as one clip. Even when a plurality of clips are played back, the first frame in the editing result (the clip to be played back first) The first frame is counted as “00: 00: 00: 00”. Therefore, even if the clip to be reproduced changes in the middle, the FTC value of the reproduction history does not return to “00: 00: 00: 00”.

  Further, the sixth line describes that tape-like playback has been performed in which all clips recorded on the disc 32 are played in order as if they were recorded on the tape medium. The end position (frame number of image data) is described. That is, in this case, the clip “C0003” is stopped at the position (frame) of “00: 02: 23: 12”. In this case, the FTC recorded as the playback history is a time code for each clip, and the FTC value of the playback history is “00: 00: 00: 00” even if the clip to be played changes midway. Will not return.

  Similarly, the history information of edit list designation reproduction is described in the seventh line, and the history information of clip designation reproduction is described in the eighth line and the ninth line, respectively.

  As described above, in the disc information file, six reproduction histories of material data such as clips and edit lists recorded on the disc 32 are recorded. Note that the number of playback histories recorded in the disc information file may be any number.

  Note that the reproduction histories of the fourth to ninth lines are arranged in order from the ninth line. That is, the history on the 9th line is the oldest, the history on the 4th line is the newest, and when a new history is registered, the oldest history is deleted. In addition, the reproduction history does not include a plurality of histories (same type histories) in which the same clip or edit list is reproduced by the same reproduction method. In other words, the above-described six playback histories are always made in a different playback method or a clip or edit list that has been played back, and a history of the same type as the currently registered history is newly registered. Will delete the older history.

  By performing the process of step S16 in FIG. 7, a disc information file described in XML as shown in FIG. 8 is generated and recorded on the disc 32.

  In this way, by managing the playback history as a disc information file, for example, a file different from other information such as an index file, the recording / playback apparatus 1 in FIG. It is only necessary to update the file, and it is possible to suppress the destruction of other information that does not need to be updated by mistake during the update.

  It should be noted that since the clip or edit list is not recorded on the disc 32 at the time when the process of step S16 in FIG. 7 is performed, there is no reproduction history thereof. Therefore, the reproduction history of the disc information file is created in an empty state. The recording history is stored in the disk 32 using the disc information file created in this way, and the recording / playback apparatus 1 in FIG. Even if the drive is once removed from the drive 26 and mounted again, the playback process can be resumed from the position (frame) where the playback process was interrupted.

  Next, the file recorded on the disk 32 and its directory structure will be described.

  Data recorded on the disk 32 by the recording / reproducing apparatus 1 is managed by a directory structure and files as shown in FIGS.

  In FIG. 9, a root directory (ROOT) 201 includes a PROAV directory in which information related to material data such as image data and audio data, an edit list indicating the editing result of the material data, and the like are arranged in a lower directory. 202 is provided.

  In the PROAV directory 202, titles and comments for all material data recorded on the disk 32, and image data corresponding to a representative image which is a frame representing all the image data recorded on the disk 32 are stored. A disc metafile (DISCMETA.XML) 203 which is a file containing information such as a path, and an index file (INDEX.XML) 204 containing management information for managing all clips and edit lists recorded on the disc 32 , And an index file (INDEX.BUP) 205 is provided. Note that the index file 205 is a copy of the index file 204, and the reliability is improved by preparing two files.

  The PROAV directory 202 further includes metadata for the entire data recorded on the disc 32, and includes, for example, a disc information file (DISCINFO.XML) 206 and a disc information file (DISKINFO) which are files including information such as a playback history. .BUP) 207 is provided. The disc information file 207 is a copy of the disc information file 206, and the reliability is improved by preparing two files.

  In addition to the above-described files, the PROAV directory 202 includes a clip root directory (CLPR) 208 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) 209 is provided.

In the clip root directory 208, the clip data recorded on the disk 32 is managed separately for each clip. For example, in the case of FIG. 9, the data of three clips is stored in the clip directory (C0001). ) 211, clip directory (C0002) 212, and clip directory (C0003) 213. That is, each piece of data of the first clip recorded on the 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 disc 32 is subordinate to the clip directory 212. Each piece of clip data recorded on the disk 32 as a third directory file is managed as a lower directory file of the clip directory 213.

  In the edit list root directory 209, the edit list recorded on the disk 32 is managed separately for each editing process. For example, in the case of FIG. 9, four edit lists are edited. 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. In other words, the edit list indicating the first editing result of the clip recorded on the 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.

  In the directory below the clip directory 211 provided in the above-described clip root directory 208, each piece of data of the clip first recorded on the disk 32 is provided and managed as a file as shown in FIG.

  In the case of FIG. 10, the clip directory 211 includes a clip information file (C0001C01.SMI) 221 that is a file for managing this clip, and an image data file (C0001V01.MXF) 222 that is a file including the image data of this clip. , Audio data files (C0001A01.MXF to C0001A08.MXF) 223 to 230, which are eight files containing the audio data of each channel of this clip, and low resolution data file (C0001S01.MXF) which is a file containing the substream data of this clip ) 231, a clip metadata file (C0001M01.XML) 232 that is a file including clip metadata that is metadata that does not require real-time property corresponding to the material data of this clip, and real-time that corresponds to the material data of this clip Need sex Frame metadata file (C0001R01.BIM) 233 which is a file including frame metadata which is generated metadata, and the frame structure of the image data file 222 (for example, information on the compression format for each picture in MPEG etc. A file such as a picture pointer file (C0001I01.PPF) 234, which is a file in which information such as an offset address from the head of the file is described, is provided.

  In the case of FIG. 10, 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.

  The audio data is also required to be real-time during reproduction, but 8 channels are prepared and are managed as different files in order to cope with multi-channel audio such as 7.1 channels. That is, the audio data has been described as being managed as eight files. However, the present invention is not limited to this, and the number of files corresponding to the audio data may be seven or less, or nine or more.

  Similarly, the image data, the low resolution data, and the frame metadata may be managed as two or more files, respectively, depending on circumstances.

  In FIG. 10, 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.

  Note that the clip metadata file 232 is described in the XML format in order to provide general versatility, but the frame metadata file 163 is configured to reduce the processing time required for playback processing and the load required for processing. This is a BIM format file compiled from an XML format file.

  The file configuration example of the clip directory 211 shown in FIG. 10 can be applied to all clip directories corresponding to each clip recorded on the disc 32. That is, since the configuration example of the file shown in FIG. 10 can be applied to the other clip directories 212 and 213 shown in FIG. 9, the description thereof is omitted.

  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.

  Next, an example of a file structure in a directory below the edit list root directory 209 in FIG. 9 will be described. In the directory below the edit list directory 215 provided in the above-described edit list root directory 209, edit list data, which is information relating to the second editing result of each data of the clip recorded on the disc 32, is shown in FIG. It is provided and managed as a file as shown.

  In the case of FIG. 11, 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 the edited material data (all clips used for editing). Edit list clip metadata which is a file including clip metadata corresponding to the portion of the material data extracted as edited data) or clip metadata newly generated based on the clip metadata A file (E0002M01.XML) 242 is provided.

  The edit list clip metadata file 242 is based on the clip metadata of the clip used for editing (a clip metadata file existing in a directory under the clip root directory 208) 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 232 in FIG. 10, and the edited material 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 material 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.

  The edit list clip metadata file 242 is described in an XML format in order to provide versatility.

  The configuration example of the files in the edit list directory 215 shown in FIG. 11 can be applied to all edit lists (edit results). That is, the configuration example of the file shown in FIG. 11 can also be applied to the other edit list directories 214, 216, or 217 shown in FIG.

  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.

  Next, disk insertion processing executed when the user inserts (mounts) the disk 32 into the drive 26 will be described with reference to the flowchart of FIG.

  When the disc 32 is inserted into the drive 26, the index file reading unit 61 of the recording / reproducing apparatus 1 reads the index file from the disc 32 via the drive 26 in step S31, and supplies the index file to the index file holding unit 51 for holding. Let Next, in step S <b> 32, the disc information file reading unit 62 reads the disc information file from the disc 32 via the drive 26 and causes the disc information file holding unit 52 to hold it. Each unit of the recording / reproducing apparatus 1 that has read the disc information file ends the disc insertion process.

  The disc information file is not read in the disc insertion process, and every time the recording / reproducing apparatus 1 refers to or updates the disc information file, the disc information file reading unit 61 performs the above-described step S32. You may make it read similarly to a process.

  Next, the processing at the timing of updating the disc information file will be specifically described.

  As described above, the disc information file is a file for managing the playback history of clips and edit lists recorded on the disc 32. Therefore, the disk information file is updated when, for example, the reproduction processing such as tape-like reproduction, edit list designation reproduction, or clip designation reproduction is finished.

  Further, the disk information file is updated when the disk 32 is ejected from the drive 26 regardless of whether or not the clip or edit list is reproduced.

  First, tape-like playback processing that is executed when all clips recorded on the disk 32 are played back in order as in the case of recording on a tape medium will be described with reference to the flowcharts of FIGS. explain.

  When the user or the like is instructed to perform tape-like playback, the disc information management unit 63 of the playback control unit 15 refers to the disc information file held in the disc information file holding unit 52 of the information holding unit 14 in step S51. Then, it is determined whether or not a tape-like playback history exists in the playback history.

  If the disc information file is not read when the disc is inserted, the disc information file reading unit 62 reads the tape-like reproduction history from the disc information file on the disc 32 in step S51, and the disc information management unit 63 Based on whether or not the disc information file reading unit 62 has read the tape-like playback history, it is determined whether or not there is a tape-like playback history in the playback history.

  If it is determined in step S51 that there is a tape-like playback history, the disc information file management unit 63 advances the process to step S52. In step S52, the playback control unit 15 reads the frame specified in the playback history from the disk 32 as a playback start frame, and proceeds to step S54.

  If it is determined in step S51 that there is no tape-like playback history, the disc information file management unit 63 advances the process to step S53. In step S53, the playback control unit 15 reads the first frame of the first clip from the disk 32 as the playback start frame based on the clip table of the index file held in the index file holding unit 51, and performs the process in step S54. Proceed.

  The first clip is a clip that is instructed to be reproduced first in the index file, and the first frame is a frame that is designated for reproduction first in the index file. . Therefore, the first frame is not necessarily the first frame of the clip material data. For example, when the index file is instructed to start playback from a frame in the middle of the clip, that frame is the first frame.

  In step S54, the playback control unit 15 determines whether or not a playback start position change instruction has been received. For example, when the user operates the input unit 21 and inputs an instruction to change the reproduction start position, the reproduction control unit 15 determines that the instruction to change the reproduction start position has been received, proceeds to step S55, and stores the index file. Based on the clip table of the index file held in the section 51, the designated frame is read from the disk 32 as a playback start frame, and the process proceeds to step S56. If it is determined in step S54 that a playback start position change instruction has not been received, the playback control unit 15 skips step S55 and proceeds to step S56.

  In step S56, the reproduction control unit 15 determines whether or not to end the tape-like reproduction process. If it is determined that the tape-like playback process is not to be terminated, the playback control unit 15 proceeds to step S57 and determines whether a playback start instruction has been accepted. If it is determined that the reproduction start instruction has not been received, the reproduction control unit 15 returns the process to step S54 and repeats the subsequent processes.

  That is, the reproduction control unit 15 waits until receiving a reproduction start instruction or ending the tape-like reproduction process while repeating the processes of steps S54 to S57. If it is determined in step S57 that a playback start instruction has been received, the playback control unit 15 starts from the playback start frame based on the clip table of the index file held in the index file holding unit 51 in step S58. Start playback. When the reproduction is started, the reproduction control unit 15 advances the process to step S71 in FIG.

  If it is determined in step S56 in FIG. 13 that the tape-like reproduction process is to be terminated based on the user's instruction or the like, the disk information file management unit 63 of the reproduction control unit 15 advances the process to step S59. Update file playback history. At this time, if the disc information file is read from the disc 32 during the disc insertion process and held in the disc information file holding unit 52, the disc information file management unit 63 stores the disc information file in the disc information file holding unit 52. Update the playback history of the stored disc information file. Details of updating the disc information file will be described later with reference to the flowcharts of FIGS.

  When the disc information file is updated, the reproduction control unit 15 executes an end process in step S60 and ends the tape-like reproduction process.

  When playback of the clip is started in step S58 in FIG. 13, the playback control unit 15 determines whether or not a playback stop instruction has been accepted in step S71 in FIG. If it is determined that the playback stop instruction has not been received and the playback process is to be continued, the playback control unit 15 proceeds to step S72 to determine whether or not playback of the current clip has ended. When it determines, the reproduction | regeneration control part 15 returns a process to step S71, and continues a reproduction | regeneration process as it is.

  If it is determined in step S72 that the playback of the current clip has been completed, the playback control unit 15 proceeds to step S73 and refers to the index file to determine whether there is a clip to be played next. To do. As a result of referring to the index file, when it is determined that the clip that has been played back is not the last clip and is still there, the playback control unit 15 advances the process to step S74 to display the attribute information of the clip directory of the clip. It is referred to and it is determined whether or not the clip can be reproduced.

  When the attribute of the clip directory is, for example, “read prohibited” and it is determined that reproduction is not possible, the reproduction control unit 15 returns the process to step S73, and repeats the subsequent processes to further clip the next clip. Process about.

  In step S74, when the attribute of the clip directory is, for example, “readable” or the like and it is determined that reproduction is possible, the reproduction control unit 15 proceeds to step S75 and is held in the index file holding unit 51. The clip table of the index file is referenced, and the specified clip is played based on the information. The playback control unit 15 that has started playback of the clip returns the processing to step S71 and repeats the subsequent processing.

  In other words, the playback control unit 15 plays back all the clips in the order described in the index file while repeating the processing from step S71 to step S75.

  If it is determined in step S73 that the reproduction of the last clip has ended in the description of the index file and there is no next clip, the reproduction control unit 15 proceeds to step S76 to stop reproduction, In step S77, based on the clip table of the index file held in the index file holding unit 51, the first frame of the first clip is read as a playback start frame, and the process returns to step S56 in FIG. repeat.

  That is, when tape-like playback has been performed to the end (when playback has been performed to the end), the playback control unit stops the playback process, and uses the first start in the XML description of the index file as a playback start frame in the next playback process. Set the first frame of the clip.

  If it is determined in step S71 that a playback stop instruction has been received from the user or the like during playback, the playback control unit 15 stops playback in step S78, and in step S79, the stopped frame is used in the next playback process. Set to playback start frame. After completing the setting of the reproduction start frame, the reproduction control unit 15 returns the process to step S56 in FIG. 13 and repeats the subsequent processes.

  By doing so, the recording / reproducing apparatus 1 can record the reproduction history on the disk 32, and in the next tape-like reproduction process, the reproduction history is used to start the tape-like operation from the position where the previous reproduction was stopped. Playback can be resumed.

  Next, edit list designation reproduction processing executed when an edit list is designated for reproduction will be described with reference to the flowcharts of FIGS.

  When the edit list is designated by the user or the like and the reproduction of the edit list is instructed, the disc information management unit 63 of the reproduction control unit 15 in step S91 in FIG. The disc information file held in the file is referred to, and it is determined whether or not the reproduction history of the edit list instructed to be reproduced exists in the reproduction history.

  If the disc information file is not read when the disc is inserted, in step S91, the disc information file reading unit 62 performs a process of reading the reproduction history of the edit list instructed to reproduce from the disc information file on the disc 32. The disc information management unit 63 determines whether or not the playback history of the edit list instructed to be played exists in the playback history based on whether or not the disc information file reading unit 62 has read the playback history of the edit list. Determine.

  If it is determined in step S91 that there is a playback history of the edit list for which playback has been instructed, the disc information file management unit 63 advances the processing to step S92. In step S92, the playback control unit 15 reads the frame specified in the playback history from the disk 32 as a playback start frame, and proceeds to step S94.

  If it is determined in step S91 that there is no reproduction history of the edit list instructed to be reproduced, the disc information file management unit 63 advances the process to step S93. In step S93, the playback control unit 15 reads the first frame of the first clip from the disk 32 as a playback start frame based on the edit list file, and advances the process to step S94.

  The first clip is the clip that is instructed to play first in the edit list file, and the first frame is the clip of the edit list file description and the clip corresponding to the edit list. This is the first frame to be played, specified in the information file. Therefore, the first frame is not necessarily the first frame of the clip material data. For example, when the XML description of the edit list file indicates that playback is to start from a frame in the middle of the clip, that frame is the first frame.

  In step S94, the reproduction control unit 15 determines whether or not a reproduction start position change instruction has been accepted. For example, when the user operates the input unit 21 and inputs an instruction to change the reproduction start position, the reproduction control unit 15 determines that the instruction to change the reproduction start position has been received, and proceeds to step S95 to edit the edit list file. Based on the description, the clip information file of the clip corresponding to the designated frame is referred to, the designated frame is read from the disk 32 as a reproduction start frame, and the process proceeds to step S96. If it is determined in step S94 that a playback start position change instruction has not been accepted, the playback control unit 15 skips step S95 and proceeds to step S96.

  In step S96, the playback control unit 15 determines whether or not to end the edit list designated playback process. If it is determined not to end the edit list designated playback process, the playback control unit 15 advances the process to step S97 to determine whether a playback start instruction has been accepted. If it is determined that the reproduction start instruction has not been received, the reproduction control unit 15 returns the process to step S94 and repeats the subsequent processes.

  That is, the reproduction control unit 15 waits until receiving a reproduction start instruction or ending the edit list designation reproduction process while repeating the processes of steps S94 to S97. If it is determined in step S97 that a reproduction start instruction has been received, the reproduction control unit 15 refers to the clip information file based on the description in the edit list file in step S98, and follows the information in the clip information file. Start playback from the playback start frame. When the reproduction is started, the reproduction control unit 15 advances the process to step S111 in FIG.

  In step S98, the playback control unit 15 may refer to the clip table of the index file based on the edit list file. Each clip element in the clip table of the index file describes basically the same information as the clip information file. Even if the clip element in the clip table is referenced, the playback control unit 15 reads and plays the clip. can do.

  If it is determined in step S96 in FIG. 15 that the edit list designation reproduction process is to be terminated based on the user's instruction or the like, the disk information file management unit 63 of the reproduction control unit 15 proceeds to step S99 to Update the playback history of the information file. At this time, if the disc information file is read from the disc 32 during the disc insertion process and held in the disc information file holding unit 52, the disc information file management unit 63 stores the disc information file in the disc information file holding unit 52. Update the playback history of the stored disc information file. Details of updating the disc information file will be described later with reference to the flowcharts of FIGS.

  When the disc information file is updated, the playback control unit 15 executes an end process in step S100, and ends the edit list designation playback process.

  When playback of the clip is started in step S98 in FIG. 15, the playback control unit 15 determines whether or not a playback stop instruction has been accepted in step S111 in FIG. If it is determined that the playback stop instruction has not been received and the playback process is to be continued, the playback control unit 15 proceeds to step S112 to determine whether or not playback of the current clip has ended. When it determines, the reproduction | regeneration control part 15 returns a process to step S111, and continues a reproduction | regeneration process as it is.

  If it is determined in step S112 that the playback of the current clip has ended, the playback control unit 15 advances the processing to step S113, and based on the XML description of the edit list file, whether or not there is a clip to be played next. Determine whether. When it is determined that the clip that has been played back is not the last clip in the XML description of the edit list file and there is still a clip, the playback control unit 15 proceeds to step S114, and attribute information of the clip directory of the clip To determine whether or not the clip is playable.

  If it is determined that the clip directory attribute is “read prohibited” or the like and playback is impossible, the playback control unit 15 returns to step S113 without playing back the clip, and the subsequent processing. Is repeated to further process the next clip.

  In step S114, when the attribute of the clip directory is “readable”, for example, and it is determined that playback is possible, the playback control unit 15 proceeds to step S115, and based on the XML description of the edit list file, The clip information file of the specified clip is referenced and the clip is played based on that information. The playback control unit 15 that has started playback of the clip returns the processing to step S111 and repeats the subsequent processing.

  That is, the playback control unit 15 plays back the clips in the order based on the description of the edit list file while repeating the processing of steps S111 to S115.

  In step S115, the playback control unit 15 may refer to the clip table of the index file based on the description of the edit list file. Each clip element in the clip table of the index file describes basically the same information as the clip information file. Even if the clip element in the clip table is referenced, the playback control unit 15 reads and plays the clip. can do.

  If it is determined in step S113 that the playback of the last clip in the XML description of the edit list file has ended and the next clip does not exist, the playback control unit 15 advances the process to step S116, stops playback, and step In S117, based on the description of the edit list file, the clip table of the clip information file or index file is referred to, and based on the information, the first frame of the first clip is read as the playback start frame, and the process is shown in FIG. Returning to step S96, the subsequent processing is repeated.

  That is, when playback is performed to the end in the edit list designation playback, the playback control unit 15 stops the playback process, and the first frame of the first clip described in the edit list file as the playback start frame in the next playback process Set.

  If it is determined in step S111 in FIG. 16 that a playback stop instruction has been received from the user or the like during playback, the playback control unit 15 stops playback in step S118, and in step S119, Set to playback start frame in playback processing. After completing the setting of the reproduction start frame, the reproduction control unit 15 returns the process to step S96 in FIG. 15 and repeats the subsequent processes.

  By doing as described above, the recording / reproducing apparatus 1 can record the reproduction history on the disc 32 at the time of the edit list designation reproduction, and uses the reproduction history in the next edit list designation reproduction process to perform the previous reproduction. The edit list specified playback can be resumed from the position where is stopped.

  Next, clip designation reproduction processing executed when a clip is designated and reproduced will be described with reference to the flowcharts of FIGS. 17 and 18.

  When a clip is designated by the user or the like and playback of the clip is instructed, the disc information management unit 63 of the playback control unit 15 holds the disc information file holding unit 52 of the information holding unit 14 in step S131 of FIG. The disc information file that has been designated is referred to, and it is determined whether or not the reproduction history of the clip for which reproduction has been instructed exists in the reproduction history.

  If the disc information file has not been read when the disc is inserted, the disc information file reading unit 62 reads the history of the clip designated reproduction of the clip instructed to reproduce from the disc information file on the disc 32 in step S131. The disc information management unit 63 performs clip designation reproduction of the clip instructed to be reproduced in the reproduction history based on whether or not the disc information file reading unit 62 has read the clip designation reproduction history. It is determined whether a history exists.

  In step S131, when it is determined that there is a clip designated reproduction history of the clip instructed to be reproduced, the disc information file management unit 63 advances the process to step S132. In step S132, the playback control unit 15 reads the frame specified in the playback history as a playback start frame from the disk 32, and proceeds to step S134.

  On the other hand, when it is determined in step S131 that there is no clip designated reproduction history of the clip instructed to be reproduced, the disc information file management unit 63 advances the process to step S133. In step S133, the playback control unit 15 reads the first frame from the disk 32 as a playback start frame based on the XML description of the clip information file, and proceeds to step S134.

  The first clip is a frame to be reproduced first specified in the description of the clip information file. Therefore, the first frame is not necessarily the first frame of the clip material data. For example, in the XML description of the clip information file, when an instruction is given to start playback from an intermediate frame, that frame is the first frame.

  In step S134, the playback control unit 15 determines whether or not a playback start position change instruction has been received. For example, when the user operates the input unit 21 and inputs an instruction to change the reproduction start position, the reproduction control unit 15 determines that the instruction to change the reproduction start position has been received, proceeds to step S135, and proceeds to the clip information file. Based on the description, the designated frame is read from the disk 32 as a playback start frame, and the process proceeds to step S136. If it is determined in step S134 that a reproduction start position change instruction has not been received, the reproduction control unit 15 skips step S135 and proceeds to step S136.

  In step S136, the playback control unit 15 determines whether or not to end the designated clip playback process. When it is determined that the clip designated playback process is not to be ended, the playback control unit 15 advances the process to step S137 and determines whether or not a playback start instruction has been accepted. If it is determined that the reproduction start instruction has not been received, the reproduction control unit 15 returns the process to step S134 and repeats the subsequent processes.

  That is, the playback control unit 15 waits until receiving a playback start instruction or ending the clip designated playback process while repeating the processes of steps S134 to S137. If it is determined in step S137 that a playback start instruction has been received, the playback control unit 15 starts playback from the playback start frame based on the description of the clip information file in step S138. When the reproduction is started, the reproduction control unit 15 advances the process to step S151 in FIG.

  In step S138, the playback control unit 15 may refer to the clip table of the index file. Each clip element in the clip table of the index file describes basically the same information as the clip information file. Even if the clip element in the clip table is referenced, the playback control unit 15 reads and plays the clip. can do.

  If it is determined in step S136 that the clip designated playback process is to be terminated based on a user instruction or the like, the disc information file management unit 63 of the playback control unit 15 proceeds to step S139 to play back the disc information file. Update history. Details of updating the disc information file will be described later with reference to the flowcharts of FIGS.

  When the disc information file is updated, the reproduction control unit 15 executes an end process in step S140 and ends the clip designation reproduction process.

  When playback of the clip is started in step S138 in FIG. 17, the playback control unit 15 determines whether or not a playback stop instruction has been accepted in step S151 in FIG. If it is determined that the playback stop instruction has not been received and the playback process is to be continued, the playback control unit 15 proceeds to step S152, determines whether or not playback of the clip has ended, and determines that it has not ended. In this case, the reproduction control unit 15 returns the process to step S151 and continues the reproduction process as it is.

  If it is determined in step S152 that the playback of the clip has been completed, the playback control unit 15 proceeds to step S153 and stops the playback. In step S154, the playback control unit 15 plays back the first frame based on the description of the clip information file. Reading as a start frame, the process returns to step S136 of FIG. 17, and the subsequent processes are repeated.

  In other words, when playback is performed to the end in the designated clip playback, the playback control unit 15 stops the playback process and sets the first frame described in the clip information file as the playback start frame in the next playback process.

  If it is determined in step S151 in FIG. 18 that a playback stop instruction has been received from the user or the like during playback, the playback control unit 15 stops playback in step S155, and in step S156, the stopped frame is Set to playback start frame in playback processing. After completing the setting of the reproduction start frame, the reproduction control unit 15 returns the process to step S136 in FIG. 17 and repeats the subsequent processes.

  By doing as described above, the recording / reproducing apparatus 1 can record the reproduction history on the disk 32 at the time of clip designated reproduction, and uses the reproduction history in the next clip designated reproduction processing to stop the previous reproduction. Clip specified playback can be resumed from the position where it was made.

  When the playback process as described above is completed, each unit of the recording / playback apparatus 1 executes a disk information file update process to update the playback history of the disk information file recorded on the disk 32.

  Next, disk information file update processing will be described with reference to FIGS. 31 and 32. FIG. As described above, this disc information file update processing is performed when the playback processing such as tape-like playback, edit list specified playback, or clip specified playback is finished. Furthermore, this is also performed when the disc 32 is ejected from the drive 26 regardless of whether or not the clip or edit list is reproduced.

  When the disc information file update process is started, the disc information file management unit 63 first determines in step S171 in FIG. 19 whether or not the type of reproduction stopped by the reproduction control unit 15 is tape-like reproduction. To do.

  If the disc information file is not read when the disc is inserted, the disc information file reading unit 62 reads the disc information file on the disc 32 and holds it in the disc information file holding unit 52 before the process of step S171.

  If it is determined in step S171 that tape-like reproduction is being performed, the disc information file management unit 63 creates a tape-like reproduction history this time in step S172, and advances the process to step S173. In step S173, the disc information file management unit 63 refers to the playback history (current playback history) of the disc information file held in the disc information file holding unit 52, and uses the current playback history to perform tape-like playback. It is determined whether a history exists.

  If it is determined in step S173 that a tape-like playback history exists in the current playback history, the disc information file management unit 63 proceeds to step S174, and the disc information file held in the disc information file holding unit 52 is reached. The old tape-like playback history in the playback history is deleted, and the created new tape-like playback history is registered at the latest position of the playback history. For example, in the XML description of FIG. 8, the disc information file management unit 63 deletes the tape-like playback history on the sixth line, moves the history on the fifth line to the sixth line, and changes the history on the fourth line to 5. Move to the line and insert the newly created tape-like playback history into the fourth line (the latest position of the playback history), which is the top line of the playback history.

  The disc information file management unit 63 that has finished the process of step S174 advances the process to step S176.

  If it is determined in step S173 that there is no tape-like playback history in the current playback history, the disc information file management unit 63 proceeds to step S175 and is held in the disc information file holding unit 52. The oldest history of the disc information file playback history is erased, and the tape-like playback history newly created in step S172 is registered at the latest position. For example, in the XML description of FIG. 8, if the 6th line is not a tape-like playback history, the disc information file management unit 63 deletes the 9th line history and the 4th to 8th line history. Move down one line at a time, move to the fifth to ninth lines, and play the newly created tape-like playback on the fourth line (the latest position in the playback history), which is the top line in the playback history. Insert history for.

  The disc information file management unit 63 that has finished the process of step S175 advances the process to step S176.

  If the playback control unit 15 determines in step S421 that the playback type stopped is not tape-like playback, the disc information file management unit 63 advances the process to step S176.

  In step S176, the disc information file management unit 63 determines whether or not the reproduction type stopped by the reproduction control unit 15 is edit list designation reproduction.

  If it is determined in step S176 that the edit list designation reproduction is performed, the disc information file management unit 63 creates a history of the current edit list designation reproduction in step S177, and advances the process to step S178. In step S178, the disc information file management unit 63 refers to the playback history (current playback history) of the disc information file held in the disc information file holding unit 52, and edits created this time in the current playback history. It is determined whether there is an edit list designated reproduction history corresponding to the same edit list as the list designated reproduction history.

  If it is determined in step S178 that the current reproduction history has an edit list designation reproduction history corresponding to the same edit list as the edit list designation reproduction history created this time, the disc information file management unit 63 performs step S179. The old edit list specified playback history in the playback history of the disc information file held in the disc information file holding unit 52 is erased, and the new edit list specified playback history created in step S177 is played back. Register at the latest position in the history. For example, when the playback history of the edit list “E0004” is created in the XML description of FIG. 8, the disc information file management unit 63 deletes the history of the edit list specified playback on the seventh line, and the history on the sixth line. Is moved to the 5th line, the history of the 5th line is moved to the 6th line, the history of the 4th line is moved to the 5th line, and the 4th line (the playback history) The newly created edit list designated reproduction history of “E0004” is inserted at the latest position).

  The disc information file management unit 63 that has finished the process of step S179 advances the process to step S191 of FIG.

  If it is determined in step S178 that there is no edit list designated playback history corresponding to the same edit list as the currently created edit list designated playback history in the current playback history, the disc information file management unit 63 Then, the process proceeds to step S180, the oldest history of the playback history of the disc information file held in the disc information file holding unit 52 is deleted, and the edit list designated playback history newly created in step S177 is updated to the latest. Register at the location. For example, when the playback history of the edit list “E0003” is created in the XML description of FIG. 8, the disc information file management unit 63 does not have the history of the edit list specified playback of “E0003” in the playback history of FIG. Therefore, the history on the 9th line is deleted, the history on the 4th to 8th lines is moved down by 1 line, moved to the 5th to 9th lines, and the top line of the playback history The newly created edit list designation reproduction history of “E0003” is inserted in the fourth line (the latest position of the reproduction history).

  The disc information file management unit 63 that has finished the process of step S180 advances the process to step S191 of FIG.

  If the playback control unit 15 determines in step S176 that the playback type stopped is not edit list specified playback, the disc information file management unit 63 proceeds to step S191 in FIG.

  In step S191, the disc information file management unit 63 determines whether or not the playback type stopped by the playback control unit 15 is clip designated playback. When it is determined that the clip designated reproduction is performed, the disc information file management unit 63 creates a history of the current clip designated reproduction in step S1922, and the process proceeds to step S193. In step S193, the disc information file management unit 63 refers to the reproduction history (current reproduction history) of the disc information file held in the disc information file holding unit 52, and the clip created this time is added to the current reproduction history. It is determined whether or not there is a clip designated reproduction history corresponding to the same clip as the designated reproduction history.

  If it is determined in step S193 that the current reproduction history has a clip designation reproduction history corresponding to the same clip as the currently created clip designation reproduction history, the disc information file management unit 63 performs the process in step S194. The old clip designation reproduction history in the reproduction history of the disc information file held in the disc information file holding unit 52 is erased, and the new clip designation reproduction history created in step S192 is replaced with the latest position of the reproduction history. Register with. For example, in the XML description of FIG. 8, when a clip designated playback history of the clip “C0003” is created, the disc information file management unit 63 deletes the clip designated playback history on the fourth line, The newly created clip designation reproduction history of “C0003” is inserted into the fourth line (the latest position of the reproduction history) which is the top line.

  At this time, the reproduction history of “C0003” also exists in the sixth line of FIG. 8, but this reproduction history is a tape-like reproduction history and is not updated in the process of step S194 because it is not a clip designated reproduction history.

  The disc information file management unit 63 that has finished the process of step S194 advances the process to step S196.

  If it is determined in step S193 that the current reproduction history does not include a clip designation reproduction history corresponding to the same clip as the clip designation reproduction history created this time, the disc information file management unit 63 performs step S195. In step S192, the oldest history of the reproduction history of the disc information file held in the disc information file holding unit 52 is deleted, and the newly created clip designation reproduction history created in step S192 is registered at the latest position. . For example, in the XML description of FIG. 8, when the clip designation playback history of “C0001” is created, the disc information file management unit 63 does not have the history of clip designation playback of “C0001” in the playback history of FIG. , Delete the history of the 9th line, move the history of the 4th line to the 8th line down by 1 line respectively, move to the 5th line to the 9th line, and at the top line of the playback history The newly created clip designation reproduction history of “C0001” is inserted into a certain fourth line (the latest position of the reproduction history).

  The disc information file management unit 63 that has finished the process of step S195 advances the process to step S196.

  If the playback control unit 15 determines in step S191 that the playback type stopped is not clip specified playback, the disc information file management unit 63 advances the process to step S196.

  In step S196, the disc information file recording control unit 82 records the updated disc information file held in the disc information file holding unit 52 on the disc information file recorded on the disc 32 in the overwrite mode.

  As described above, the overwrite mode refers to an updated disc information file in which the data size has not changed and the attribute data such as the file name and date / time has not changed, and the disc information file before update is recorded. This means writing at a certain position.

  The disc information file recording control unit 82 that has finished the processing of step S196 ends the disc information file update processing.

  Next, the effect of writing the disc information file to the disc 32 in the overwrite mode in the disc information file update processing will be described with reference to FIG.

  The writing of the disk information file to the disk 32 corresponds to the writing of the file to the non-real time area 161 of the file recording area 142 of FIG. 6 from the viewpoint of the hierarchy of the file system 112 shown in FIG.

  FIG. 21 shows the relationship between the writing of a file to the file recording area 142 in FIG. 6 and the management information 153 recorded in the inner circumference fs recording area 141 in FIG.

  FIG. 21A shows a state in which the disc information file before update is recorded on the disc 32. That is, the disk information file D1 before update is recorded in the non-real time area 161 of the file recording area 142, and the disk information file D1 before update in the file recording area 142 is recorded in the inner circumference side fs recording area 141. Management information fs1 for managing the recording position and the like is recorded.

  FIG. 21B shows a state in which the disc information file has been updated by cyclic recording from the state shown in FIG. 21A. In the case of FIG. 21B, since the updated disc information file D2 is recorded at a different position from the disc information file D1 before the update, the management information in the inner periphery side fs recording area 141 is also updated to fs2 and cyclically recorded. Will be. That is, file system backup is executed.

  FIG. 21C shows a state in which the disk information file has been updated by overwriting with a change in size from the state shown in FIG. 21A. In the case of FIG. 21C, the updated disc information file D2 is overwritten on the pre-update disc information file D1, but its size is different. Therefore, the management information in the inner fs recording area 141 is also updated to fs2. It will be recorded cyclically. That is, file system backup is executed.

  FIG. 21D corresponds to the disk information file update process described above, and shows a state in which the disk information file is updated in the overwrite mode from the state shown in FIG. 21A. In the case of FIG. 21D, the updated disc information file D2 is recorded in the overwrite mode (the same position, the same size, and the attribute data is not changed) in the disc information file D1 before the update. The management information in the circumferential fs recording area 141 is also kept at fs1 and is not updated. That is, the file system backup is not executed.

  Therefore, in the recording / reproducing apparatus 1 that executes the above-described disc information file update processing, the file system backup is not executed in updating the disc information file, so that the durability of the inner peripheral FS recording area 141 decreases (the number of rewrites increases) ) Can be deterred.

  Further, since the file system backup is not executed when the disk 32 is ejected, it is possible to reduce the unmount time from when the user performs the eject operation until the disk 32 is ejected.

  In the above description, the case where the material data is reproduced using the recording / reproducing apparatus as shown in FIG. 1 has been described. However, the present invention is not limited to this. For example, an editing apparatus that edits material data may be used. It may be a playback device that performs data playback processing. Note that the configuration of the editing apparatus to which the present invention is applied only needs to include the configuration of the recording / reproducing apparatus 1 shown in FIG. 1, and processing related to reproduction of material data by this editing apparatus is performed by the recording / reproducing apparatus 1 described above. Since this is the same as the case, the description thereof is omitted.

  FIG. 22 is a block diagram showing a configuration example of a playback apparatus to which the present invention is applied. The same parts as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  The reproduction apparatus 300 is a reproduction apparatus that reproduces the material data recorded on the disk 32 described above, and has a recording control unit 311 that records a disk information file on the disk 32, and is the same as the case of the recording / reproduction apparatus 1 described above. In addition, using the disc information file, the material data can be reproduced from the previous reproduction stop position.

  The recording control unit 311 has a disc information file creation unit 81 and a disc information file recording control unit 82 as in the case of the recording control unit 16 of the recording / reproducing apparatus 1 shown in FIG. Thus, a disc information file can be created, and a newly created playback history can be recorded on the disc 32 loaded in the drive 26.

  Note that the playback device 300 is obtained by deleting the material data recording function from the recording / playback device 1 in FIG. 1, and the playback processing of the material data recorded on the disk 32 is performed in the case of the recording / playback device 1 described above. It is the same. That is, the playback device 300 plays back the material data recorded on the disk 32 by using a method such as tape-like playback, edit list specified playback, or clip specified playback, and records the playback history on the disk 32. can do. Further, the playback device 300 can play back the material data from the previous playback stop position with reference to the playback history recorded on the disc 32 at the start of playback.

  Also, since the playback history is recorded on the disk 32 as one file different from other information, the playback device 300 does not need to update other information that does not need to be updated when the playback history is updated. , It is possible to prevent other information from being destroyed accidentally at the time of update, to reduce the amount of data to be updated when updating the playback history, and to reduce the load and processing time of the update process . In addition, this makes it possible to reduce the manufacturing cost of the playback apparatus 300.

  In the above description, the playback stop position is stored in units of frames in the playback history of the disc information file. However, the present invention is not limited to this. For example, GOP ( It may be a group of picture) unit or a time code in a unit different from the frame unit.

  In the playback history of the disc information file, the playback stop position has been described as being stored by the number of frames from the first frame (or the first frame). However, the present invention is not limited to this, and any position may be used as a reference.

  As described above, the recording / reproducing apparatus, editing apparatus, or reproducing apparatus to which the present invention is applied records the reproduction history of the material data on the disk 32 as a file different from other information, and records it on the disk 32 at the start of reproduction. The playback history may be used to determine the playback start position, and any method may be used as long as the processing is similar to the above processing. Processing other than processing may be further performed. The configuration of the recording / playback apparatus, editing apparatus, or playback apparatus to which the present invention is applied may be a configuration other than the above-described configuration as long as such processing can be performed.

  The series of processes described above can be executed by hardware or can be executed by software. When executed by software, the above-described recording / reproducing apparatus or the like is configured by a personal computer as shown in FIG. In FIG. 23, the same parts as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 23, the CPU 401 of the personal computer 400 executes various processes according to a program stored in the ROM 402 or a program loaded from the storage unit 413 to the RAM 403. The RAM 403 also appropriately stores data necessary for the CPU 401 to execute various processes.

  The CPU 401, ROM 402, and RAM 403 are connected to each other via a bus 404. An input / output interface 410 is also connected to the bus 404.

  The input / output interface 410 includes an input unit 411 including a keyboard and a mouse, a display including a CRT (Cathode Ray Tube) and an LCD (Liquid Crystal display), an output unit 412 including a speaker, and a hard disk. A communication unit 414 including a storage unit 413 and a modem is connected. The communication unit 414 performs communication processing via a network including the Internet.

  A drive 415 is connected to the input / output interface 410 as necessary, and a removable medium 421 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is appropriately mounted, and a computer program read from these is loaded. It is installed in the storage unit 413 as necessary.

  When a series of processing is executed by software, a program constituting the software is installed from a network or a recording medium.

  As shown in FIG. 1, FIG. 22, or FIG. 23, this recording medium is a magnetic disk (floppy disk) that is distributed to provide a program to the user separately from the main body of the apparatus. Removable media 31 including an optical disk (including compact disk-read only memory (CD-ROM), DVD (digital versatile disk)), a magneto-optical disk (including MD (mini-disk)), or a semiconductor memory. Alternatively, the ROM 12 or the ROM 402 in which the program is recorded, the hard disk included in the storage unit 23 or the storage unit 413, which is provided not only by the removable medium 421 but also provided in the apparatus main body in advance. Consists of.

  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.

Further, in this specification, the system represents the entire apparatus constituted by a plurality of apparatuses.

It is a figure which shows the structural example of the recording / reproducing apparatus to which this invention is applied. It is a block diagram which shows the detailed structural example of the information holding part of FIG. FIG. 2 is a block diagram illustrating a detailed configuration example of a reproduction control unit in FIG. 1. FIG. 2 is a block diagram illustrating a detailed configuration example of a recording control unit in FIG. 1. FIG. 5 is a functional block diagram illustrating a relationship of processing performed by each unit illustrated in FIGS. 2 to 4. It is a figure which shows the area | region on the disk managed by the file system of FIG. It is a flowchart explaining a disk format process. It is a figure which shows the example of the XML description of a disc information file. It is a figure which shows the example of the directory structure in the disk of FIG. FIG. 5 is a diagram showing a more detailed configuration example of the directory structure shown in FIG. 4. FIG. 5 is a diagram showing a more detailed configuration example of the directory structure shown in FIG. 4. It is a flowchart explaining a disk insertion process. It is a flowchart explaining a tape-like reproduction | regeneration process. It is a flowchart following FIG. 13 explaining a tape-like reproduction process. It is a flowchart explaining edit list designation | designated reproduction | regeneration processing. FIG. 17 is a flowchart following FIG. 16 for explaining edit list designation reproduction processing; It is a flowchart explaining clip designation | designated reproduction | regeneration processing. It is a flowchart following FIG. 17 explaining clip designation | designated reproduction | regeneration processing. It is a flowchart explaining a disk information file update process. FIG. 20 is a flowchart illustrating the disk information file update process, following FIG. 19. FIG. It is a figure for demonstrating the effect which employ | adopted overwrite mode in the disk information file update process. It is a block diagram which shows the structural example of the reproducing | regenerating apparatus to which this invention is applied. It is a block diagram which shows the structural example of one Embodiment of the computer to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus, 14 Information holding part, 15 Playback control part, 16 Recording control part, 32 Disc, 51 Index file holding part, 52 Disc information file holding part, 61 Index file reading part, 62 Disc information file reading part, 63 Disc information file management unit, 71 Index file creation unit, 72 Index file management unit, 73 Index file recording control unit, 81 Disc information file creation unit, 82 Disc information file recording control unit, 204 Index file, 206 Disc information file, 300 Playback device, 311 recording controller

Claims (6)

Reproduction means for reading and reproducing predetermined data recorded on the recording medium;
Creating means for sequentially creating history information of reproduction of the data by the reproducing means;
Recording means for overwriting and recording the history information created by the creating means as one file on the recording medium;
And reading means for reading the history information recorded by the recording means,
The information processing apparatus, wherein the reproduction unit determines a reproduction start position of the data based on the history information read by the reading unit, and reads and reproduces the data from the reproduction start position. . The creation unit sequentially creates history information of reproduction of the data by the reproduction unit without changing attribute data including at least one of a data size and a file name or a creation date and time. The information processing apparatus according to claim 1. A holding unit for holding management information including a recording position of the file recorded on the recording medium;
The management information held by the holding unit is not updated when the history information created by the creating unit is overwritten and recorded on the recording medium as one file. Information processing device. The information processing apparatus according to claim 1, wherein the data includes at least one of image data, audio data, and metadata added to the image data. A reproduction step of reading and reproducing predetermined data recorded on the recording medium;
A creation step of sequentially creating history information of reproduction of the data by the processing of the reproduction step;
A recording step of overwriting and recording the history information created in the creation step as a file on the recording medium;
A reading step of reading the history information recorded in the processing of the recording step, and
The reproduction step determines the reproduction start position of the data based on the history information read in the processing of the read step, and reads and reproduces the data from the reproduction start position. Processing method. A reproduction step of reading and reproducing predetermined data recorded on the recording medium;
A creation step of sequentially creating history information of reproduction of the data by the processing of the reproduction step;
A recording step of overwriting and recording the history information created in the creation step as a file on the recording medium;
A reading step of reading the history information recorded in the processing of the recording step, and
The reproduction step determines a reproduction start position of the data based on the history information read in the process of the read step, reads the data from the reproduction start position, and reproduces the data. A program that causes a computer to execute.

Images