JP2005243069A - Recording device, recording method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise a read speed in reproducing a recording medium. <P>SOLUTION: When a clip #1 is recorded, it is recorded with index files 134-1, 135-1, a clip information file 151-1, and a clip metadata file 162-1 in this order from a front side of physical address of an optical disk to a back side. When a clip #2 is recorded, it is recorded with a clip metadata file 162-2, a clip information file 151-2, and index files 134-2, 135-2 in this order from the front side of the physical address to the back side. When a clip #3 is recorded, it is recorded with index files 134-3, 135-3, a clip information file 151-3, and a clip metadata file 162-3 in this order from the front side of physical address to the back side. This invention can be applied to a recording device which records to a recording medium. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a recording apparatus, a recording method, and a program, and more particularly, to a recording apparatus, a recording method, and a program that improve the reading speed during reproduction.

  In recent years, a technique has been developed in which additional information is added to image data or audio data as editing information when image data or audio data acquired by shooting or the like is recorded on a recording medium (for example, Patent Document 1).

  For example, when additional information is added to image data or audio data and recorded on a recording medium, the recording apparatus records additional information including a plurality of files in a predetermined order.

Japanese Patent Laying-Open No. 2001-292421 (pages 14-15, FIG. 8)

  However, among the multiple files recorded as additional information, there are files that do not need to be read in operation or files that need to be read, and are updated when image data or audio data is updated. Since a file to be deleted or a file not to be deleted is generated, there is a problem that a reading speed during reproduction is slow.

  In addition, there is a problem that seek time during reproduction may become long due to fragmentation of the free area.

  The present invention has been made in view of such a situation, and is intended to improve the reading speed during reproduction.

  The recording apparatus according to the present invention includes a first file and a second file, and a first file among the third file and the fourth file that have a high probability of being read from the first file and the second file. A recording apparatus that writes a third file as a set and writes a second file and a fourth file as a set to a recording medium, wherein the number of times of writing to the recording area of the recording medium is equalized. A determination unit that determines a free area of the file as a file writing area; and a file writing area determined by the determination unit, wherein the first file, the third file are transferred from the front side to the rear side of the physical address of the recording medium. Order control means for controlling the order of writing the files so as to write the first file and the third file in the order of the files, and the order controlled by the order control means. And a writing means for writing the first file and the third file as a set in the file writing area determined by the determining means, and the order control means includes the first file and the third file by the writing means. After the file is written, when writing the second file and the fourth file as a set to the recording medium, the file writing area determined by the determining means is moved from the front side to the rear side of the physical address of the recording medium. Then, the writing order of the files is controlled so that the fourth file and the second file are written in the order of the fourth file and the second file, and the writing means is controlled in the order controlled by the order control means. The fourth file and the second file are written as a set in the file writing area determined by the determining means.

  The order control means may control the order of writing the files so that the third file and the fourth file are adjacent to each other.

  In the case where the sixth file having a higher probability of being read than the fifth file that is read with substantially the same probability as the second file is read and the fifth file are further written as one set, the order control means is a determining means. When the second file is recorded at a position adjacent to the front side of the file writing area determined by the above, the file writing area determined by the determining means moves from the front side to the rear side of the physical address of the recording medium. Then, the writing order of the files is controlled so that the fifth file and the sixth file are written in the order of the fifth file and the sixth file, and adjacent to the front side of the file writing area determined by the determining means When the third file is recorded at the position to be recorded, the physical area of the recording medium is stored in the file writing area determined by the determining means. The writing order of the files is controlled so that the sixth file and the fifth file are written in the order of the sixth file and the fifth file from the front side to the rear side of the dress. The sixth file and the fifth file may be written as a set in the file writing area determined by the determining means in the order controlled by the means.

  The first file, the third file, and the fifth file among the first file, the fourth file, and the fifth file and the sixth file that are likely to be deleted from the first to fourth files. When the second file, the fourth file, and the sixth file are written as one set, the order control means stores the physical address of the recording medium in the file write area determined by the determination means. Of writing the fifth file, the first file, and the third file in the order of the fifth file, the first file, and the third file from the front side to the rear side of the file. And the writing means includes, in the order controlled by the order control means, the fifth file, the first file, and the file writing area determined by the determining means, 3 files are written as one set, and the order control means writes the second file, the fourth file, the sixth file after the fifth file, the first file, and the third file are written by the writing means. In the case of writing to the recording medium as one set of files, the fourth file, the second file, the sixth file are written in the file writing area determined by the determining means from the front side to the rear side of the physical address of the recording medium. The writing order of the files is controlled so that the fourth file, the second file, and the sixth file are written in the order of the files, and the writing means is controlled by the determining means in the order controlled by the order control means. The fourth file, the second file, and the sixth file may be written as a set in the determined file writing area. .

  The recording method of the present invention includes the first file and the second file, and the first file and the third file and the fourth file that are more likely to be read than the first file and the second file. A recording method of a recording apparatus that writes a third file as a set and writes a second file and a fourth file as a set to a recording medium so that the number of times of writing to the recording area of the recording medium is equalized. A determination step of determining a free area of the recording area as a file writing area, and a file writing area determined by the processing of the determination step, the first from the front side to the rear side of the physical address of the recording medium An order control step for controlling the writing order of the files so that the first file and the third file are written in the order of the first file and the third file; Processing in the order control step, including a writing step for writing the first file and the third file as a set in the writing area of the file determined by the processing in the determination step in the order controlled by the processing in the control step. Then, after the first file and the third file are written by the process of the writing step, when writing the second file and the fourth file as a set to the recording medium, the file determined by the process of the determining step The writing order of the files so that the fourth file and the second file are written in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium. In the process of the writing step, the order of the decision step is controlled in the order controlled by the process of the order control step. The writing area of the file that has been determined by the physical, fourth file and the second file is characterized by being written as one set.

  The program according to the present invention includes a first file, a second file, and a third file and a fourth file that have a high probability of being read from the first file and the second file. A program for writing three files as one set and writing the second file and the fourth file as one set to a recording medium, and the number of times of writing to the recording area of the recording medium is equalized. A determination step for determining an empty area as a file writing area; a file writing area determined by the processing of the determination step; a first file, a third file from a front side to a rear side of a physical address of a recording medium; An order control step for controlling the writing order of the files so that the first file and the third file are written in the order of the files; Causing the computer to execute a process including a writing step of writing the first file and the third file as a set in the writing area of the file determined by the process of the determining step in an order controlled by the processing of the step; In the process of the order control step, when the first file and the third file are written by the process of the writing step and then the second file and the fourth file are written as a set on the recording medium, the process of the determination step The fourth file and the second file are written in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium in the file writing area determined by The file write order is controlled by the process, and the write step process is controlled by the order control step process. Incidentally, in the writing area of the file that has been determined by the processing of the determination step, the fourth file and the second file is characterized by being written as one set.

  In the present invention, an empty area of the recording area is determined as a file writing area so that the number of times of writing to the recording area of the recording medium is equal, and the physical area of the recording medium is determined in the determined file writing area. From the front side to the back side of the address, the writing order of the files is controlled so that the first file and the third file are written in the order of the first file and the third file, and in the controlled order, The first file and the third file are written as a set in the file writing area. In addition, when the second file and the fourth file are written as a set to the recording medium after the first file and the third file are written, the physical area of the recording medium is stored in the determined file writing area. The file writing order is controlled so that the fourth file and the second file are written in the order of the fourth file and the second file from the front side to the rear side of the target address, and in the controlled order. The fourth file and the second file are written as a set in the file writing area.

  According to the present invention, the recording medium can be read quickly. In particular, according to the present invention, the first file and the second file, and the first file out of the third file and the fourth file that have a higher probability of being read from the first file and the second file. Even when the third file and the third file are written as a set and the second file and the fourth file are written as a set on the recording medium, the reading of the third file and the fourth file can be accelerated.

  Embodiments of the present invention will be described below. The correspondence relationship between the invention described in this specification and the embodiments of the invention is exemplified as follows. This description is intended to confirm that the embodiments supporting the invention described in this specification are described in this specification. Therefore, even if there is an embodiment that is described in the embodiment of the invention but is not described here as corresponding to the invention, the fact that the embodiment is not It does not mean that it does not correspond to the invention. Conversely, even if an embodiment is described herein as corresponding to an invention, that means that the embodiment does not correspond to an invention other than the invention. Absent.

  Further, this description does not mean all the inventions described in this specification. In other words, this description is for the invention described in the present specification, which is not claimed in this application, that is, for the invention that will be applied for in the future or that will appear and be added by amendment. It does not deny existence.

  The recording apparatus according to claim 1 (for example, the recording apparatus 1 of FIG. 1) is a first file (for example, C clip information file 151-1 or A and B index files 134-1 and 135-1). And the second file (for example, the C clip information file 151-2 or the A and B index files 134-2 and 135-2), and the first file and the second file are more likely to be read. Of the third file (for example, the clip metadata file 162-1 of FIG. 5D) and the fourth file (for example, the clip metadata file 162-2 of D of FIG. 5), the first file and The third file is a set, and the second file and the fourth file are a set. 2) A recording device for writing to 2), wherein a determining means (for example, FIG. 12) determines a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium is equalized. The control unit 16 in FIG. 1 that executes the processing of step S32) and the first file from the front side to the rear side of the physical address of the recording medium in the file writing area determined by the determination unit , Order control means for controlling the writing order of the files so as to write the first file and the third file in the order of the third file (for example, the first time of steps S33 to S35 in FIG. 12). The order control unit 17 in FIG. 1 for executing the process and the file determined by the determination means in the order controlled by the order control means A writing means for writing the first file and the third file as a set in the writing area (for example, the drive 15 in FIG. 1 for executing the first processing in step S36 in FIG. 12), The order control means, when the first file and the third file are written by the writing means, and then writing the second file and the fourth file as a set to a recording medium, the determining means The fourth file and the second file in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium in the file writing area determined by The writing order of the files is controlled so as to write the file (for example, the second processing from step S33 to step S35 in FIG. 12), Writes the fourth file and the second file as one set in the file writing area determined by the determining means in the order controlled by the order control means (for example, step S36 in FIG. 12). The second process).

  The order control means of the recording apparatus according to claim 2 controls the order of writing the files so that the third file and the fourth file are adjacent to each other.

  5. A fifth file (for example, C clip information file 151-3 or A and B index files 134-3) read with approximately the same probability as the second file read probability of the recording apparatus according to claim 3. , 135-3), when the sixth file (for example, the clip metadata file 162-3 in FIG. 5D) and the fifth file are further written as one set, the order control means If the second file is recorded at a position adjacent to the front side of the file writing area determined by the determining means, the physical area of the recording medium is stored in the file writing area determined by the determining means. From the front side to the back side of the address, the fifth file and the sixth file are arranged in the order of the fifth file and the sixth file. If the third file is recorded at a position adjacent to the front side of the file writing area determined by the determining means, the writing order of the file is controlled so as to write the file and the sixth file. From the front side to the rear side of the physical address of the recording medium, the sixth file and the fifth file are placed in the file writing area determined by the determination unit in the order of the sixth file and the fifth file. The writing unit controls the writing order of the file so that the fifth file is written, and the writing unit includes the sixth file and the sixth file in the file writing area determined by the determining unit in the order controlled by the order controlling unit. The fifth file is written as one set.

  5. The recording apparatus according to claim 4, wherein the first to fourth files and the fifth file having a higher probability of being deleted than the first to fourth files (for example, the index files 134 of A and B). -1,135-1) and the sixth file (for example, A and B index files 134-2, 135-2), the first file (for example, C clip information file 151-1), The third file and the fifth file are a set, and the second file (for example, C clip information file 151-2), the fourth file, and the sixth file are a set. In the case of writing as, the order control means stores the physical address of the recording medium in the file writing area determined by the determination means. The fifth file, the first file, and the third file are arranged in the order of the fifth file, the first file, and the third file from the front side to the rear side. The writing order of the files is controlled so as to be written, and the writing means has the fifth file, the first file in the writing area of the file determined by the determining means in the order controlled by the order controlling means. The file and the third file are written as one set, and the order control means writes the fifth file, the first file, and the third file after the writing means writes the fifth file, the first file, and the third file. When writing the file 2, the fourth file, and the sixth file as a set to the recording medium, writing the file determined by the determining means The fourth file, the second file, and the sixth file in this order from the front side to the rear side of the physical address of the recording medium in the order of the fourth file, the second file, The writing order of the file is controlled so as to write the file and the sixth file, and the writing means is in the order controlled by the order control means in the file writing area determined by the determining means. The fourth file, the second file, and the sixth file are written as one set.

  The recording method according to claim 5 includes a first file (for example, C clip information file 151-1 or A and B index files 134-1 and 135-1) and a second file (for example, C Clip information file 151-2 or A and B index files 134-2 and 135-2) and a third file (for example, FIG. 5) having a higher probability of being read from the first file and the second file. Among the D clip metadata file 162-1) and the fourth file (for example, the D clip metadata file 162-2 in FIG. 5), the first file and the third file are set as one set, Recording apparatus (example) for writing the second file and the fourth file as a set to a recording medium (optical disc 2 in FIG. 1) For example, in the recording method of the recording apparatus 1) of FIG. 1, a determination step of determining a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium becomes equal. (For example, step S32 in FIG. 12) and the file writing area determined by the processing of the determination step, from the front side to the rear side of the physical address of the recording medium, the first file, the first An order control step (for example, the first processing in steps S33 to S35 in FIG. 12) for controlling the order of writing the files so that the first file and the third file are written in the order of the third file; The file write area determined by the process of the determination step in the order controlled by the process of the order control step Includes a writing step of writing the first file and the third file as a set (for example, the first processing of step S36 in FIG. 12). In the processing of the order control step, the writing step After the first file and the third file are written by processing, when the second file and the fourth file are written as a set on the recording medium, the file determined by the processing of the determination step The fourth file and the second file are written to the writing area in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium. The file writing order is controlled (for example, the second processing from step S33 to step S35 in FIG. 12), and the writing step is performed. In the process, the fourth file and the second file are written as a set in the file writing area determined by the process of the determination step in the order controlled by the process of the order control step ( For example, the second processing in step S36 of FIG.

  The program according to claim 6 includes a first file (for example, C clip information file 151-1 or A and B index files 134-1 and 135-1) and a second file (for example, C clip). Information file 151-2 or A and B index files 134-2 and 135-2) and a third file (for example, D in FIG. 5) having a high probability of being read from the first file and the second file. Of the clip metadata file 162-1) and the fourth file (for example, the clip metadata file 162-2 of FIG. 5D), the first file and the third file are set as one set. A recording device that writes the second file and the fourth file as a set to a recording medium (optical disc 2 in FIG. 1) ( For example, in the recording method of the recording apparatus 1) of FIG. 1, a determination step of determining a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium becomes equal. (For example, step S32 in FIG. 12) and the file writing area determined by the processing of the determination step, from the front side to the rear side of the physical address of the recording medium, the first file, the first An order control step (for example, the first processing in steps S33 to S35 in FIG. 12) for controlling the order of writing the files so that the first file and the third file are written in the order of the third file; The file writing process determined by the process of the determination step in the order controlled by the process of the order control step. A computer including a writing step (for example, the first processing of step S36 in FIG. 12) for writing the first file and the third file as a set in the area, In the processing, after the first file and the third file are written by the processing in the writing step, the determination step is performed when the second file and the fourth file are written as a set on a recording medium. From the front side to the rear side of the physical address of the recording medium, the fourth file and the second file in the order of the fourth file and the second file The writing order of the files is controlled so as to write the second file (for example, two times of steps S33 to S35 in FIG. 12). In the process of the write step, the fourth file and the second file are placed in the file write area determined by the process of the determination step in the order controlled by the process of the order control step. Are written as a set (for example, the second processing in step S36 in FIG. 12).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration example of a recording apparatus 1 to which the present invention is applied.

  The recording apparatus 1 is an apparatus that performs editing processing such as recording data on the optical disc 2 or deleting data recorded on the optical disc 2.

  As shown in FIG. 1, the recording apparatus 1 includes an input data processing unit 11, a storage unit 12, an operation unit 13, a display unit 14, a drive 15, a control unit 16, and a sequence control unit 17.

  The input data processing unit 11 includes a video / audio interface, an encoder, a buffer memory, and the like. For example, the input data processing unit 11 performs encoding processing and audio processing on an image signal input from an imaging device (not shown) or an audio signal input from a microphone. The AV data obtained as a result is supplied to the drive 15 via the control unit 16.

  The storage unit 12 stores data necessary for the editing process performed by the control unit 16 and supplies the stored data to the control unit 16.

  The operation unit 13 is appropriately operated by the user when a predetermined command is input to the control unit 16. The display unit 14 displays a message and an image corresponding to the data supplied from the control unit 16.

  The drive 15 performs a process of recording the input data from the input data processing unit 11 input via the control unit 16 on the optical disc 2 or deleting the data recorded on the optical disc 2. The control unit 16 controls each unit.

  The order control unit 17 controls the order for recording auxiliary information (file recorded in the metadata area 202 of FIG. 4 described later) attached to the AV data read from the input data processing unit 11 on the optical disc 2. To do.

  The optical disk 2 uses, for example, a blue-violet laser having a numerical aperture (NA) of 0.85 and a wavelength of 405 nm, and has a recording capacity of a minimum mark length of 0.14 μm and a track pitch of 0.32 μm and a large capacity (for example, 27 gigabytes). Is an optical disc capable of recording The optical disk 2 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. A plurality of clip data including, for example, image data and audio data is recorded on the optical disc 2. In the following, image data and audio data are collectively referred to as AV data.

  Next, a file system for managing data recorded on the optical disc 2, and a directory structure and files in the file system will be described.

  As a file system for managing data recorded on the optical disc 2, any file system may be used, for example, UDF (Universal Disk Format), ISO9660 (International Organization for Standardization 9660), or the like. When a magnetic disk such as a hard disk is used instead of the optical disk 2, the file system is FAT (File Allocation Tables), NTFS (New Technology File System), HFS (Hierarchical File System), or UFS (Unix (registered trademark)). ) File System) may be used. A dedicated file system may be used.

  In this file system, data recorded on the optical disc 2 is managed by a directory structure and files as shown in FIG.

  In FIG. 2, a root directory (ROOT) 131 includes a PROAV directory 132 in which information relating to essence data such as image data and audio data, an edit list indicating editing results of essence data, and the like are arranged in a lower directory. Provided. The root directory 131 is also provided with configuration table data and the like, although not shown.

  In the PROAV directory 132, titles and comments for all essence data recorded on the optical disc 2 and image data corresponding to a representative image that is a frame representing all the image data recorded on the optical disc 2 are stored. A disc metafile (DISCMETA.XML) 133 which is a file including information such as a path, and an index file (INDEX.XML) 134 including management information for managing all clips and edit lists recorded on the optical disc 2 , And an index file (INDEX.BUP) 135 is provided. Note that the index file 135 is a duplicate of the index file 134, and reliability is improved by preparing two files.

  Further, the PROAV directory 132 is metadata for the entire data recorded on the optical disc 2, and is, for example, a disc information file (DISCINFO.XML) that is a file including information such as disc attributes, playback start position, or Reclnhi. 136 and a disc information file (DISKINFO.BUP) 137 are provided. The disc information file 137 is a copy of the disc information file 136, and the reliability is improved by preparing two files. However, when updating these pieces of information, only the disc information file 136 may be updated.

  In addition to the above-mentioned files, the PROAV directory 132 includes a clip root directory (CLPR) 138 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) 139 is provided.

  In the clip root directory 138, clip data recorded on the optical disc 2 is managed separately for each clip. For example, in the case of FIG. 2, data of three clips is stored in the clip directory (C0001). ) 141, a clip directory (C0002) 142, and a clip directory (C0003) 143. That is, each piece of data of the first clip recorded on the optical disc 2 is managed as a file in a directory under the clip directory 141, and each piece of data of the clip recorded on the optical disc 2 is subordinate to the clip directory 142. Each piece of clip data managed as a directory file and thirdly recorded on the optical disc 2 is managed as a file in a directory under the clip directory 143.

  In the edit list root directory 139, the edit list recorded on the optical disc 2 is managed in different directories for each editing process. For example, in the case of FIG. 2, four edit lists are edited. The list directory (E0001) 144, the edit list directory (E0002) 145, the edit list directory (E0003) 146, and the edit list directory (E0004) 147 are managed separately. That is, the edit list indicating the first editing result of the clip recorded on the optical disc 2 is managed as a file in a directory under the edit list directory 144, and the editing list indicating the second editing result is the edit list directory 145. The edit list indicating the third editing result is managed as a file in the lower directory of the edit list directory 146, and the editing list indicating the fourth editing result is the edit list directory 147. It is managed as a file in the lower directory.

  In the directory below the clip directory 141 provided in the above-described clip root directory 138, each data of the clip recorded on the optical disc 2 first is provided and managed as a file as shown in FIG.

  In the case of FIG. 3, the clip directory 141 includes a clip information file (C0001C01.SMI) 151 which is a file for managing this clip, and an image data file (C0001V01.MXF) 152 which is a file including image data of this clip. , Audio data files (C0001A01.MXF to C0001A08.MXF) 153 to 160 which are eight files including audio data of each channel of this clip, and low resolution data file which is a file including low resolution data corresponding to the image data of this clip (C0001S01.MXF) 161, including clip metadata corresponding to the essence data of this clip, such as a conversion table that associates an LTC with a frame number, which is metadata that does not require real-time properties (non-real-time metadata) File A clip metadata file (C0001M01.XML) 162, a frame metadata file (C0001R01.XML) corresponding to the essence data of this clip, for example, a file including frame metadata that is metadata requiring real-time properties, such as LTC. BIM) 163 and a picture pointer file (file that describes the frame structure of the image data file 152 (for example, information related to the compression format for each picture in MPEG or the like, information such as an offset address from the top of the file)) C0001I01.PPF) 164 or the like is provided.

  In the case of FIG. 3, 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. 3, clip metadata that does not require real-time property (hereinafter, also referred to as non-real-time metadata) 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 162 is described in XML (eXtensible Markup Language) format in order to provide versatility, but the frame metadata file 163 reduces the processing time and the load required for the processing. This is a BIM format file compiled from an XML format file.

  The configuration example of the file of the clip directory 141 shown in FIG. 3 can be applied to all clip directories corresponding to each clip recorded on the optical disc 2. That is, since the example of the file configuration shown in FIG. 3 can be applied to the other clip directories 142 and 143 shown in FIG. 2, 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, with reference to FIG. 4, a soft partition when each file shown in FIGS. 2 and 3 is recorded on the optical disc 2 will be described.

  In FIG. 4, the left side corresponds to the inner periphery of the optical disc 2, and the right side corresponds to the outer periphery of the optical disc 2. An FS (file system) area 201 is provided on the innermost periphery of the optical disc 2, and metadata (NRT (non-real-time, ie, real-time) is required on the outer periphery of the FS area 201 so as to be in contact with the FS area 201. No)) area 202 is provided, and an AV data (RT (real time, ie, real time property is required)) area 203 is provided on the outer periphery so as to be in contact with the metadata area 202.

  In the present embodiment, a plurality of files recorded in the metadata area 202 will be described.

  In the metadata area 202, non-real-time metadata that does not require real-time property is recorded under the FS management recorded in the FS area 201. The recording method in this case is cyclic recording. Here, the cyclic recording will be briefly described with reference to FIG. In the examples of FIGS. 5 and 6, the metadata area 202 has no empty area once deleted after being written, and nothing is written to the address after the physical address to be written. There is no area.

  FIG. 5 is a diagram for explaining a plurality of files recorded in the metadata area 202. In the figure, A is an index file (INDEX.XML) 134, B is an index file (INDEX.BUP) 135, C is a clip information file (C0001C01.SMI) 151, and D is a clip metadata file ( C0001M01.XML) 162.

  In FIG. 3, when the contents of the clip information file C (C0001C01.SMI) 151 and the clip metadata file D (C0001M01.XML) 162 are recorded, all clips and edit lists recorded on the optical disc 2 are managed. The index file (INDEX.XML) 134 and the index file (INDEX.BUP) 135 including the management information for doing so are also updated.

  Specifically, as shown in FIG. 5, when the first clip (clip # 1) is recorded, the clip information file (C) of clip # 1 is set as the clip information file 151-1, and the clip metadata file (D ) Is the clip metadata file 162-1, the A index file 134-1 and the B index file 135-1 are also updated. As a result, the A index file 134-1 and the B index file 135-1 are updated. -1, C clip information file 151-1 and D clip metadata file 162-1 are written as one set in the metadata area 202. At this time, the files are written in the order of A, B, C, and D from the front side to the rear side of the physical address of the optical disc 2.

  Next, when a second clip (clip # 2), which is a clip directory different from clip # 1 (same root directory (ROOT) 131 and different clip directory), is recorded, the clip information file of clip # 2 ( When C) is the clip information file 151-2 and the clip metadata file (D) is the clip metadata file 162-2, the index file 134-1 for A and the index file 135-1 for B are also index files 134- As a result, the index file 134-2 of A, the index file 135-2 of B, the clip information file 151-2 of C, and the clip of D are updated. Data data file 162-2 is written as a set in the metadata area 202, the index file 134-1 and index files 135-1 of A to B, is deleted for reference need to be eliminated. As described above, the clip information file 151-2 of C and the clip metadata file 162-2 of D are different from the clip directory of the clip # 1 (for example, the clip directory (C0001) 141 in FIG. 2). Therefore, the clip information file 151-1 of C and the clip metadata file 162-1 of D are not deleted, and the index file 134-1 of A and the index file 135 of B that are files that are not managed by the FS are deleted. -1 is deleted. At this time, the index file 134-2 and the B index file 135-2 are not written on the A index file 134-1 and the B index file 135-1 to be deleted, and the D clip metadata file 162- Written after 1 In this way, the recording method in which the recording area is used evenly is the cyclic recording.

  Next, when the third clip (clip # 3), which is a different clip directory (same root directory (ROOT) 131 and different clip directory) from clip # 1 and clip # 2, is recorded. When clip information file (C) is clip information file 151-3 and clip metadata file (D) is clip metadata file 162-3, A index file 134-2 and B index file 135-2 are also included. Since the index file 134-3 and the B index file 135-3 are updated, as a result, the A index file 134-3, the B index file 135-3, the C clip information file 151-3, and D of the clip metadata file 162-3 is written as a set in the metadata area 202, the index file 135-2 of the index file 134-2 and B of A is deleted because the reference need to be eliminated. As described above, the C clip information file 151-3 and the D clip metadata file 162-3 are clip directories different from the clip directories of the clip # 1 and the clip # 2, and thus the C clip information file The clip metadata files 162-1 and 162-2 of 151-1 and 151-2 and D are not deleted, and the index file 134-2 and the index file 135- 2 is deleted. At this time, since cyclic recording is performed, the A index file 134-3, the B index file 135-3, the C clip information file 151-3, and the D are added after the D clip metadata file 162-2. The clip metadata file 162-3 is written.

  Similarly, as the fourth clip (clip # 4) different from clips # 1 to # 3, A index file 134-4, B index file 135-4, C clip information file 151-4, and D The clip metadata file 162-4 is written in the metadata area 202, and the A index file 134-3 and the B index file 135-3 are deleted.

  As described above, when a file is deleted, since the newly recorded file is not immediately written in the deleted file area, but the cyclic recording is performed, the number of times of writing to the recording area on the optical disc 2 is set. Can be even.

  In the following, when it is not necessary to individually distinguish the A index files 134-1 to 134-4 (and 134-5 to be described later), they are referred to as index files 134 and B index files 135-1 to 135-. 4 (and 135-5 to be described later) need not be individually distinguished, they are referred to as an index file 135, and C clip information files 151-1 to 151-4 (and 151-5 to be described later) are individually distinguished. When it is not necessary, it is referred to as a clip information file 151, and when it is not necessary to individually distinguish the D clip metadata files 162-1 to 162-4 (and 162-5 described later), it is referred to as a clip metadata file 162. .

  Next, a recording method for recording a plurality of files in the metadata area 202 to which the present invention is applied will be described with reference to FIG. In the figure, portions corresponding to those in FIG. 5 are denoted by the same reference numerals, and the description thereof will be omitted because it will be repeated. In the example of FIG. 6, a case will be described in which the metadata area 202 is sequentially written from the front side to the rear side of the physical address of the optical disc 2 in an area that has not been written yet.

  In the case of FIG. 6, the recording of clip # 1 is the same as that of clip # 1 of FIG. 5, but when recording clip # 2, the order of the newly recorded clip files is A, B, C, And D, C, A, and B (the four files A, B, C, and D are recorded as one set). That is, D, C, A, and B files are written as a set in the order of D, C, A, and B from the front side to the rear side of the physical address of the optical disc 2 in the file writing area (recording). The order is controlled and recorded. Specifically, the D clip metadata file 162-2, the C clip information file 151-2, the A index file 134-2, and the B index file 135-2 are arranged in order (the physical address of the recording medium). Are written as a set in the metadata area 202 (from the front side to the rear side).

  Further, the recording of clip # 3 is the same as that of clip # 3 in FIG. 5, but when recording clip # 4, the order of the newly recorded clip files is in the order of A, B, C, and D. D, C, A, and B (four files A, B, C, and D are recorded as one set). That is, D, C, A, and B files are written as a set in the order of D, C, A, and B from the front side to the rear side of the physical address of the optical disc 2 in the file writing area (recording). The order is controlled and recorded. Specifically, in other words, an array of D clip metadata file 162-4, C clip information file 151-4, A index file 134-4, and B index file 135-4 (physical recording medium A set is written in the metadata area 202 (from the front side to the rear side of the target address).

  Furthermore, the recording of clip # 5 is recorded as a set in the order of A, B, C, D from the front side to the rear side of the physical address of the optical disc 2 in the same manner as clip # 1 and clip # 3. The That is, from the front side to the rear side of the physical address of the optical disc 2, the A index file 134-5, the B index file 135-5, the C clip information file 151-5, and the D clip metadata file 162 -5 is written as a set in the metadata area 202, and the A index file 134-4 and the B index file 135-4 are deleted (because they do not need to be referenced).

  That is, when the clip to be recorded is the 2n-1 (n = 1, 2, 3,... M, n is an arbitrary natural number, n ≧ M) th clip, the physical address of the optical disc 2 is moved from the front side to the rear side. The clip order is A, B, C, D, and the clip to be recorded is the 2nth clip (n = 1, 2, 3,... M, n is an arbitrary natural number). In this case, the order of the clips is D, C, A, B from the front side to the rear side of the physical address of the optical disc 2.

  Since the index file 134 of A and the index file 135 of B are deleted and newly written when a new clip is written, when the 2n-th clip is written, as shown in FIG. By adopting an order (D, C, A, B) in which the last two files are included, four positions of files to be deleted can be continued. Specifically, when the fourth clip is recorded, the A index file 134-2 (index file 134-2 recorded in the second clip) and the B index file 135-2 (recorded in the second clip). Index file 135-2), A index file 134-3 (index file 134-3 recorded in the third clip), and B index file 135-3 (index file 135- recorded in the third clip). Since 3) is deleted, the result is an empty area in which four files are deleted successively.

  In the case of the example of FIG. 5, two files, that is, an A index file 134-2 (index file 134-2 recorded in the second clip) and a B index file 135-2 (recorded in the second clip). Deleted index file 135-2), A index file 134-3 (index file 134-3 recorded in the third clip) and B index file 135-3 (third clip). Since the recorded index file 135-3) has a deleted empty area (the C clip information file 151-2 and the D clip metadata file 162-2 are sandwiched), as shown in FIG. 2n-1 (n = 1, 2, 3,... M, n is an arbitrary natural number) The clip of the recording order D, by C, A, is B, it is possible to suppress the fragmentation of free space.

  Further, the C clip information file 151 is a file for managing clips, and it is hardly necessary to reproduce at the time of reproduction. Therefore, when the 2n-th clip is written, as shown in FIG. The information file 151 is reproduced in an order that makes contact with A and B (index file 134 and index file 135) that may be deleted, that is, (order of D, C, A, and B). The clip metadata file 162 of D, which is the file to be processed, can be made continuous with the 2n-1th clip metadata file 162 of D. Specifically, when clip # 2 is recorded, D clip metadata files 162-1 and 162-2 are continuously recorded. As a result, the clip metadata file 162 can be read more quickly than in the case of FIG.

  Since both A and B are files that may be deleted, the order of A and B when the order is changed (inverted) may be reversed (B, A) or as it is (A, B). But you can.

  6 is summarized as follows.

  A file is recorded in the metadata area 202 by a cyclic recording method. In the cyclic recording, the empty area of the recording area is determined as the file writing area so that the number of times of writing to the empty area of the recording area of the optical disc 2 becomes equal. A, B, and C are files with a low probability of being read from D. The 2n-1th clip is recorded in the order of A, B, C, and D from the front side to the rear side of the physical address of the optical disc 2, and the 2nth clip is the physical address of the optical disc 2. Recording is performed in the order of D, C, A, and B from the front side to the rear side. Here, the files A and B (index files 134 and 135) are files that have a high possibility of being deleted (rewritten), and the file C (clip information file 151) is a file having a low probability of reading. The file (clip metadata file 162) is a file having a high read probability. That is, the 2n-1th clip is recorded from the front side to the rear side of the physical address of the optical disc 2 in the order of a file that is likely to be deleted, a file that has a low read probability, and a file that has a high read probability. The 2n-th clip is recorded in the order of a file having a high read probability, a file having a low read probability, and a file having a high possibility of being deleted from the front side to the rear side of the physical address of the optical disc 2.

  In this way, at the boundary between the 2n-1th clip and the 2nth clip, two files with a high probability of reading D (in the example of FIG. 6, the clip metadata file 162) are recorded side by side, and 2n Files with a high probability of deletion of A and B are recorded side by side (four in the case of the example in FIG. 6) at the boundary between the 2nd and 2n-1th clips. Thereby, as compared with the case where the recording order of the files is the same every time (as compared with the case where recording is always performed in the order of A, B, C, D as shown in FIG. 5), the free space is fragmented. Can be reduced to half. In addition, since a file having a high read probability is continuously recorded, the file reading time can be shortened.

  As shown in FIG. 6, two files (A, B) having a high probability of being deleted, one file (C) having a low read probability, and one file (D) having a high read probability are shown. However, the number is not limited, and if these three types (files with a high probability of being deleted, files with a low probability of reading, and files with a high probability of reading) are recorded as a single unit, Can also be applied.

  In the example of FIG. 6, the three types of files having a high probability of being deleted, a file having a low probability of reading, and a file having a high probability of reading have been described, but a file (A, B) or You may make it divide into the file (D) with low reading probability, and the file (D) with high reading probability from these A, B, and C files. Specifically, files (A, B) that are likely to be deleted or files (C) with a low read probability are grouped into files with a lower read probability than D, and A, B, C, D are first set as files. When writing as one set, writing to the writing area from the front side to the rear side of the physical address of the optical disc 2 in the order of a file of D and a file having a lower probability of reading than D (here, A, B, C), Thereafter, when A, B, C, and D are written as one set, files having a lower probability of reading than D (in this case, A, B, and C in the writing area) from the front side to the rear side of the physical address of the optical disc 2 are written. ), Write in the order of file D. As a result, files having a high probability of reading D are continuously recorded, so that the file reading time can be shortened.

  Furthermore, in the case of the example in FIG. 6, the three types of files having a high probability of being deleted, a file having a low probability of reading, and a file having a high probability of reading have been described, but the same applies to any two of these types. Can be applied. For example, if there are two types of files, a file with a high probability of being deleted and a file with a high probability of reading, the 2n-1st clip records a file with a high probability of being deleted and a file with a high probability of reading. In the 2nth clip, by recording in order of a file having a high read probability and a file having a high possibility of being deleted, the same effect as the above-mentioned three types, that is, fragmentation of the free area is achieved. In addition to being able to reduce to half, the file reading time can be shortened. Also, for example, if there are two types of files, a file with a low read probability and a file with a high read probability, the 2n-1st clip records the file with the low read probability and the file with the high read probability in order. Clips are recorded in the order of the file with the highest read probability and the file with the low read probability, so that the same effect as the above three types, that is, the fragmentation of the free space is suppressed to a half. As well as reducing the file reading time. The order of the 2n-1 recorded file and the order of the 2nth recorded file may be reversed.

  In the following, the order recorded in the 2n-1th clip (for example, the order of A, B, C, D from the front side to the rear side of the physical address of the optical disc 2) is referred to as a normal order. The order in which the 2n-th clip is recorded (for example, the order of D, C, A, B from the front side to the rear side of the physical address of the optical disc 2) is referred to as the reverse order.

  In the example of FIGS. 5 and 6 described above, the metadata area 202 that has been once written and erased is not written into the metadata area 202 but is written in the area that has not been written yet from the front side of the physical address of the optical disc 2. The case of sequentially writing to the rear side has been described. However, when a plurality of other files have already been recorded in the metadata area 202, and when writing to the metadata area 202 after being once written or erased is included, The case where the present invention is applied to the case of cyclic recording will be described.

  First, an example in which cyclic recording for equalizing the number of times of writing to a randomly accessible recording medium (for example, the optical disc 2 in FIG. 1) is applied to the present invention will be described with reference to FIGS. To do.

  First, an outline of editing processing in the recording apparatus 1 in FIG. 1 will be described with reference to the flowchart in FIG. Here, for the sake of simplicity, each process will be described in the order shown in the flowchart of FIG. 7, but the start-up process in step S1, the data recording process in step S3, and the data deletion process in step S5 are independent of each other. It can be performed, or can be performed by another device.

  In step S1, the control unit 16 performs a process of starting the recording apparatus 1 when the power is turned on, for example. Details of this processing will be described later with reference to the flowchart of FIG.

  Next, in step S2, the control unit 16 determines whether or not data recording is requested from the operation unit 13. If it is determined that data recording is requested, the control unit 16 proceeds to step S3 and controls the drive 15. Then, a data recording process for recording the data input from the input data processing unit 11 on the optical disc 2 is executed. Details of this processing will be described later with reference to the flowchart of FIG.

  When it is determined in step S2 that data recording is not requested, or when data is recorded in step S3, the process proceeds to step S4, and the control unit 16 requests the operation unit 13 to delete data. If it is determined that deletion of data has been requested, the process proceeds to step S5 to execute a data deletion process for deleting the requested data. Details of this processing will be described later with reference to the flowchart of FIG.

  If it is determined in step S4 that deletion of data has not been requested, or if data has been deleted in step S5, the process proceeds to step S6, and the control unit 16 determines whether or not editing has been requested. If it is determined that the request has been made, the process proceeds to step S7. For example, when the optical disk 2 is removed, it is determined that the end of editing has been requested, and the process proceeds to step S7.

  In step S7, the control unit 16 controls the drive 15 to perform the processing in steps S1, S3, and S5 together with free area data (information such as the size and location of the free area used in the conventional recording apparatus). The free area rewrite management data created in step 1 is recorded on the optical disc 2. Thereafter, the process ends.

  Note that the processing in step S7 may be performed when the optical disc 2 is taken out or when the power is turned off.

  Next, the activation process in step S1 of FIG. 7 will be described with reference to the flowchart of FIG.

  In step S11, the control unit 16 creates a current queue 301, a next queue 302, a write count column 303, and a recording start position column 304 on the storage unit 12, as shown in FIG. The created current queue 301 through recording start position column 304 are empty.

  Next, in step S12, the control unit 16 determines whether or not free space rewriting management data is recorded on the optical disc 2, and if it is determined that it is not recorded, the process proceeds to step S13. Free area rewriting is performed on the optical disk 2 on which data has not been written or deleted (edited) by the recording device 1 (that is, on the optical disk 2 in which free area rewriting management data is not recorded in step S7 in FIG. 7). Since no management data is recorded, when such an optical disc 2 is loaded, the process proceeds to step S13.

  In step S13, the control unit 16 determines whether or not free space data is recorded on the optical disc 2. If it is determined that free space data is recorded, the process proceeds to step S17.

  In step S17, the control unit 16 stores, in the current queue 301 created in the storage unit 12, area information on all the empty areas existing on the optical disc 2 at the time of loading (in this example, the area start position and size of the empty area). ) Are set in the order of the positions on the addresses of the free areas.

  For example, when there are free areas E to H as shown in FIG. 10 on the optical disc 2, the current queue 301 includes the start positions of the free areas E to H as shown in FIG. And the magnitude | size is set in order of an area | region head position. Here, the position of the free area is represented by, for example, a logical block number representing the order of each logical sector number for each block, and the size is represented by the number of blocks belonging to the free area.

  In the following, setting the area information as described above will be referred to as registering a free area.

  Next, in step S15, the control unit 16 initially sets 1 in the write count column 303 created in the storage unit 12, as shown in FIG. 11, and in step S16, in the record start position column 304, The initial position (position 00000) of the optical disc 2 is initialized. In FIG. 10, an upward arrow represents a recording start position. The same applies to the other drawings.

  If it is determined in step S13 that no free space data is recorded, the process proceeds to step S14. Since the empty area data is not recorded on the optical disk 2 that has not been formatted by the recording apparatus 1 or the conventional recording apparatus in the state as shipped, when such an optical disk 2 is loaded, Proceed to step S14.

  In step S14, the control unit 16 registers the entire recording area of the optical disc as one free area in the current queue 301 of the storage unit 12. Thereafter, the processing proceeds to step S15.

  If it is determined in step S12 that free area rewrite management data is recorded, the process proceeds to step S18. The free space rewriting management data means all the data set in each of the current queue 301 to the recording start position column 304 as shown in FIG. 11, and this data has undergone editing processing. Recording is performed on the optical disc 2 in step S7.

  In step S <b> 18, the control unit 16 registers the free area (the area information) registered in the current queue 301 included in the free area rewrite management data in the current queue 301 generated in the storage unit 12. The free area registered in the next queue 302 included in the area rewriting management data is registered in the next queue 302 generated in the storage unit 12. In step S19, the control unit 16 sets the value set in the write count column 303 included in the free space rewrite management data in the write count column 303 generated in the storage unit 12, and in step S20. Then, the value set in the recording start position column 304 included in the empty area rewrite management data is set in the recording start position column 304 of the storage unit 12.

  That is, the empty area rewrite management data of the optical disc 2 is read into the storage unit 12 by the processes of steps S18 to S20.

  When a predetermined value is set in the recording start position column 304 in step S16 or step S20, the process proceeds to step S2 in FIG.

  Next, the data recording process in step S3 in FIG. 7 will be described with reference to the flowchart in FIG. 12, and the data deletion process in step S5 in FIG. 7 will be described with reference to the flowchart in FIG. The outline will be described in accordance with FIG.

  First, the data recording process will be described. That is, in step S31 of FIG. 12, the control unit 16 determines whether or not an empty area is registered in the current queue 301 generated in the storage unit 12 in step S14, step S17, or step S18 of FIG. If it is determined that a free area is registered, the process proceeds to step S32, and among the free areas registered in the current queue 301, the free area located at the forefront of the address (closest to the head of the optical disc 2). Is determined as a data writing area. Then, the data immediately before the data writing area is read via the drive 15 and supplied to the sequence control unit 17.

  Next, in step S33, the order control unit 17 determines whether or not the data immediately before the data writing area is arranged in the normal order. Here, the term “immediately before” refers to a position adjacent to the physical address on the front side of the data writing area. As described above with reference to FIG. 6, in the 2n-1th clip, the order of A, B, C, and D, that is, a file with a high probability of being deleted, a file with a low probability of reading, and a reading probability of The 2nth clip is recorded in the order of D, C, A, and B, that is, the file having a high read probability, the file having a low read probability, and the probability of being deleted. Since the files are recorded in the order of the highest file, the order control unit 17 is a file (A, B) with a high probability that the data immediately before the area in which this data is written (adjacent to the front side of the physical address) is deleted. If the file (D) has a high read probability, it is determined that the file is in the reverse order.

  If it is determined in step S33 that the data immediately before the area to be written is arranged in the normal order, that is, the data immediately before writing is the order of 2n-1th (odd number) clips A, B, C, If they are arranged in the order of D, in step S34, the order control unit 17 receives the data input by the input data processing unit 11 via the control unit 16, and writes the file (index file 134,. 135, the order of the clip information file 151 and the clip metadata file 162) is reversed and the order is reversed. That is, when the data immediately before writing is the 2n-1th clip, the data to be written next is the 2nth clip, so the order control unit 17 sets the order of the files to be written in the metadata area 202 to D, C, The order is A and B. In other words, the order control unit 17 reverses the order of the files and reverses the order.

  If it is determined in step S33 that the data immediately before the writing area is not in the normal order (in the reverse order), that is, the data immediately before the writing is in the order of the 2nth (even number) clip. If they are arranged in the order of D, C, A, and B, in step S35, the order control unit 17 receives the data input by the input data processing unit 11 via the control unit 16, and writes it in the metadata area 202. The order of the files (index files 134 and 135, clip information file 151, and clip metadata file 162) is assumed to be the normal order. That is, when the data immediately before writing is the 2n-th clip, the data to be written next is the 2n-1-th clip, so the order control unit 17 sets the order of the files to be written in the metadata area 202 to A, B, The order is C and D. In other words, the order control unit 17 sets the file order as it is in the normal order. Note that the processing of step S35 may be omitted because the order is not actually changed.

  When the 2n-1th clip is recorded by the processing of step S33 to step S35, the order of the files recorded in the metadata area 202 is the normal order, and the 2nth clip is recorded. In this case, the order of the files recorded in the metadata area 202 is reversed. As a result, fragmentation of the free area of the metadata area 202 can be suppressed to a half, and the file reading time can be shortened.

  Next, in step S36, the control unit 16 controls the drive 15 to input the empty area determined in step S32 on the optical disc 2 by the input data processing unit 11, and the order control unit 17 controls the order. The recorded data (step S33 to step S35) is recorded.

  In step S <b> 37, the control unit 16 changes the area information of the empty area where the data is written according to the written data amount. Specifically, the area start position and size are changed to indicate that of an empty area formed after data is written.

  In step S38, the control unit 16 determines whether or not all the data to be recorded has been recorded on the optical disc 2, and if it is determined that the data to be recorded remains unrecorded, the process returns to step S31. The subsequent processing is executed.

  That is, by the first processing in step S31 and step S32 to step S38, the control unit 16 sets the free area in the recording area as a file writing area so that the number of times of writing to the recording area on the optical disc 2 becomes equal. A, B, C, D in the order of A, B, C, D from the front side to the rear side of the physical address of the optical disc 2 in the determined file writing area. The order of writing the files is controlled by the order control unit 17 so that the files are written, and the files A, B, C, and D are written as a set by the drive 15 in the determined file writing area in the controlled order. It is. Thereafter, the control unit 16 sets the free area in the recording area as a file writing area so that the number of times of writing to the recording area on the optical disc 2 is equalized by the processing of the second step S31 and steps S32 to S38. From the front side to the rear side of the physical address of the optical disc 2 in the determined file writing area, in the order of D, C, A, B (reverse order), A, B, C, D The order of writing the files is controlled by the order control unit 17 so that the files are written, and the D, C, A, and B files are written as a set by the drive 15 in the determined file writing area in the controlled order. It is.

  In addition, after one set of A, B, C, and D is written in the first step S31, step S32 to step S38, the area in which data is written in the second step S31 is the first A. , B, C, D may be a different free area from the written area. For example, the case where the area written in the first time is the empty area E in FIG. 10 and the area in which the data determined in the second step S31 is written is the empty area F in FIG. Considering such a case, in the process of step S33, the file recorded at the position adjacent to the front side (of the physical address of the optical disc 2) of the area in which the data determined in the process of step S31 is written is D ( If it is D, the process proceeds to step S34, where the file order is reversed (D, C, A, B), and if it is not D, step S35 is performed. The order of files may be set to the normal order (A, B, C, D).

  Hereinafter, the description “whether the data immediately before the writing area is arranged in the normal order” in step S33 is “whether D (the last file in the normal order) is recorded at a position adjacent to the front side of the writing area. It is the same as the description “.

  If it is determined in step S38 that all the data to be recorded has been recorded, the process proceeds to step S39, where the control unit 16 sets the recording start position in the recording start position column 304 of the storage unit 12 to the data write end position ( The position is changed to the location where the last data was written in the process of step S36.

  When it is determined in step S31 that no free area is registered in the current queue 301, the process proceeds to step S40, and the control unit 16 increments the number of writes in the write number column 303 of the storage unit 12 by 1 and In step S41, the recording start position in the recording start position column 304 is returned to the head (position 00000) of the optical disc 2.

  Next, in step S <b> 42, the control unit 16 moves the free area registered in the next queue 302 to the current queue 301. As a result, the next queue 302 becomes empty.

  In step S43, the control unit 16 determines whether or not a free area is registered in the current queue 301. If it is determined that the free area is registered, the control unit 16 returns to step S32 and executes the subsequent processing.

  If it is determined in step S43 that no free area is registered in the current queue 301, the process proceeds to step S44, and the control unit 16 controls the display unit 14 to display an error message indicating that recording is not possible.

  When the recording start position in the recording start position column 304 is changed in step S39, or when an error message is displayed in step S44, the process proceeds to step S4 in FIG.

  In the process of FIG. 12, after the area in which data is written is determined in step S32, the data immediately before the area in which the data is written is read, and in step S33, it is determined whether or not the order is normal. However, the present invention is not limited to this, and may be stored in the storage unit 12 in association with an empty area of the current queue 301.

  With the processing in FIG. 12, a free area of the recording area is determined as a file writing area so that the number of times of writing to the recording area on the optical disc 2 is equal (step S31). It is determined whether or not the file recorded at the position adjacent to the front side (of the physical address of the optical disc 2) is D (normal order) (step S33). Is in the reverse order (D, C, A, B) (step S34), and if it is not D, the order of the files is the normal order (A, B, C, D) (step S35). As a result, fragmentation of the free area can be suppressed, and the seek time during reproduction can be shortened, that is, the reading speed during reproduction can be increased.

  Next, the data deletion processing in step S5 in FIG. 7 will be described with reference to the flowchart in FIG.

  In step S <b> 51, the control unit 16 controls the drive 15 to delete, for example, data designated by the operation by the operation unit 13 from the optical disc 2.

  Here, the deletion includes not only that the data is actually deleted but also that the data is handled as deleted.

  Next, in step S52, the control unit 16 records in the storage unit 12 the area from which data has been deleted in step S51 (the area from which data has been deleted) (or the area from which data has been deleted). It is determined whether or not it is ahead of the recording start position in the start position column 304. If it is determined that it is ahead, the process proceeds to step S53, and the area from which data has been deleted (empty area) is registered in the next queue 302. To do. At this time, the empty area information set in the next queue 302 is sorted in the order of the area head position.

  In step S54, the control unit 16 determines whether or not an adjacent free area is registered in the next queue 302. If it is determined that such a free area is registered, the process proceeds to step S55. Integrate those area information.

  If it is determined in step S54 that no adjacent empty area is registered, or if the area information is integrated in step S55, the process proceeds to step S6 in FIG.

  If it is determined in step S52 that the area from which data has been deleted is not ahead (behind) the recording start position in the recording start position column 304, the process proceeds to step S56, and the control unit 16 deletes the data. The designated area (free area) is registered in the current queue 301. At this time, the area information set in the current queue 301 is sorted in the order of the area head position.

  In step S57, the control unit 16 determines whether or not an adjacent free area is registered in the current queue 301. If it is determined that such a free area is registered, the process proceeds to step S58. Integrate those area information.

  When it is determined in step S57 that no adjacent empty area is registered, or when area information of adjacent empty areas is integrated in step S58, the process proceeds to step S6 in FIG.

  Next, the data recording process (step S3 in FIG. 7 (FIG. 12)) will be described again based on a specific example.

  First, it is assumed that data having a size of 4000 is recorded on the optical disc 2 having a free area as shown in FIG.

  In this case, the storage unit 12 stores the current queue 301, the next queue 302, the write count column 303, and the recording start position column 304 as shown in FIG. In step S31, YES is determined, and the process proceeds to step S32. In the free areas registered in the current queue 301, the free area E located at the forefront of the address is determined as the area in which data is written. . Further, when the data written in the position adjacent to the front side of the area to be written in step S33, that is, the front side position adjacent to the position (01000) is arranged in the normal order (in the case of the file of D) (step If YES is determined in S33), the order of the files is reversed in Step S34, and the files are in the reverse order (if the files are A or B) (if NO is determined in Step S33) In step S35, the order of the files is changed to the normal order. In step S36, data having a size of 4000 is written from the beginning (position 01000) of the empty area E as shown in FIG. Then, in step S37, as shown in FIG. 15, the area information of the empty area E in which the data of size 4000 is written is changed to “area head position = 05000, size = 3000”. The empty area E in which the area information is changed in this way is referred to as an empty area E ′.

  In step S38, since all the data of size 4000 to be recorded has been written in the empty area E, a determination of YES is made and the process proceeds to step S39. In step S39, after the recording start position in the recording start position column 304 is changed to position 05000 as shown in FIG. 15, the process proceeds to step S4 in FIG.

  It is assumed that data of size 7000 is continuously recorded. In this case, since empty areas E ′ to H are registered in the current queue 301 (FIG. 15) in step S31, a determination of YES is made, and the process proceeds to step S32, where data is written in the empty area E ′. Determined in the area. In addition, when the data written so as to be adjacent to the position adjacent to the front side of the area to be written in step S33, that is, the position (05000) is arranged in the normal order (when YES is determined in step S33), step If the order of the files is reversed in S34 and the order is reversed (if NO is determined in Step S33), the order of the files is changed to the normal order in Step S35, and the size of 7000 is determined in Step S36. Of the data, data having a size of 3000 is written in the empty area E ′. In step S37, as shown in FIG. 16, the area information of the empty area E ′ in which the data of size 3000 is written is deleted from the current queue 301.

  In step S38, it is determined that data to be recorded still remains (data of size 4000 still remains), and the process proceeds again to step S32 via step S31.

  In step S32, this time, the free area F (FIG. 16) is determined as the area in which the data is written, and the data immediately before the area to be written in step S33 (adjacent to the front of the physical address), that is, the position (10000). When the adjacently written data is arranged in the normal order (when it is determined YES in step S33), the file order is reversed in step S34, and the data is arranged in the reverse order (step S33). In step S35, the order of the files is changed to the normal order, and in step S36, the remaining data of size 4000 is the head of the empty area F (position 10000) as shown in FIG. Written from. Then, in step S37, as shown in FIG. 18, the area information of the empty area F in which the data of size 4000 is written is changed to “area head position = 14000, size = 5000”. The empty area F in which the area information is changed in this way is referred to as an empty area F ′.

  Thus, the data to be recorded is separated (for example, A and B are recorded in the empty area E ′, and a set of A, B, C, and D are separated in the empty area F, such as C and D). Even in the case of recording, the sequence control unit 17 reads the sequence of the data recorded immediately before and controls the sequence. As a result, the data recorded immediately before and the data recorded next are at least continuously the same type of data (for example, a file that is highly likely to be deleted or a file that has a high probability of being read). Similarly, free space fragmentation can be suppressed and the file reading time can be shortened.

  In step S38, it is determined that all of the size 7000 to be recorded has been recorded, and the process proceeds to step S39. In step S39, after the recording start position in the recording start position column 304 is changed to the position 14000 as shown in FIG. 18, the process proceeds to step S4 in FIG.

  Next, as shown in FIG. 17, it is assumed that data having a size of 2000 is deleted from the position 26000 of the optical disk 2 on which data is recorded. At this time, the storage unit 12 stores a current queue 301, a next queue 302, a write count column 303, and a recording start position column 304 as shown in FIG.

  In this case, in step S51 in FIG. 13, data of size 2000 is deleted from position 26000 as shown in FIG. In step S52, the area from which data has been deleted (empty area J) is not in front of the recording start position (position 14000) in the recording start position column 304 (the position indicated by the upward arrow in FIG. 19). Therefore (because it is behind), a NO determination is made and the process proceeds to step S56.

  In step S56, the free area J is registered in the current queue 301 as shown in FIG. Since the area information is sorted in the order of the area start position, the area information “area start position = 26000, size = 2000” of the empty area J is the area information of the empty area G and the area information of the empty area H. Set between.

  In step S57, in this case, since the free area G and the free area J registered in the current queue 301 are adjacent to each other, a determination of YES is made, and the process proceeds to step S58, as shown in FIGS. The area information of the empty area G and the area information of the empty area J are integrated as the area information of the empty area K. Thereafter, the processing proceeds to step S6 in FIG.

  Next, it is assumed that data of size 4000 is deleted from position 01000. In this case, when the data is deleted in step S51 as shown in FIG. 23, the area from which the data is deleted (empty area L) in step S52 is the recording start position (in the recording start position column 304). Since the position is ahead of the position 14000), a determination of YES is made, and the free area L is registered in the next queue 302 as shown in FIG.

  In step S54, in this case, since the adjacent empty area is not registered in the next queue 302, NO is determined, and the process proceeds to step S6 in FIG.

  Further, it is assumed that data of size 2000 is deleted from position 12000. As shown in FIG. 25, when the data is deleted in step S51, the area from which the data has been deleted (empty area M) is the recording start position (position 14000) in the recording start position column 304 in step S52. YES, a determination of YES is made and the process proceeds to step S53.

  In step S53, the free space M is registered in the next queue 302 as shown in FIG. Since the area information is sorted in the order of the area start position, the area information “area start position = 12000, size = 2000” of the empty area M is set next to the area information of the empty area L.

  In step S54, since the free area L and the free area M registered in the next queue 302 are not adjacent to each other, NO is determined, and the process proceeds to step S6 in FIG. In FIG. 25, the empty area M and the empty area F ′ are adjacent to each other, but the empty area M is registered in the next queue 302 and the empty area F ′ is set in the current queue 301. There is no integration.

  This time, data recording is repeated on the optical disc 2 on which data is recorded as shown in FIG. 25 (the processing of steps S31 to S39 in FIG. 12 is repeated), as shown in FIG. Further, data is further recorded when there is no empty area after the recording start position (position 39000) in the recording start position column 304.

  At this time, the storage unit 12 stores a current queue 301, a next queue 302, a write count column 303, and a recording start position column 304 as shown in FIG.

  In this case, NO is determined when the current queue 301 becomes empty in step S31 of FIG. 12, and the process proceeds to step S40. As shown in FIG. 29, the write count in the write count column 303 is incremented by one. In step S41, the recording start position in the recording start position column 304 is returned to the beginning (position 00000) of the optical disc 2 as shown in FIG. 29 (FIG. 30).

In step S42, the area information of the empty areas L and M registered in the next queue 302 (FIG. 29) is moved to the current queue 301 as shown in FIG.
Therefore, YES is determined in step S43, and the process proceeds to step S32.

  In step S32, the free area L is determined as an area in which data is written. In step S36, data is written in the free area L.

  When data is further recorded and the current queue 301 becomes empty again as shown in FIG. 32 (when data is recorded on the optical disc 2 as shown in FIG. 33), further data is recorded. It shall be. At this time, the recording start position in the recording start position column 304 is a position 14000.

  In this case, since a free area is not registered in the current queue 301 in step S31, NO is determined, and the process proceeds to step S40. As shown in FIG. Incremented to 3, and the recording start position in the recording start position column 304 is returned to the beginning (position 00000) of the optical disc 2 as shown in FIG. 34 (FIG. 35).

  In step S 42, the free area registered in the next queue 302 is moved to the current queue 301. In this case, as shown in FIG. 34, since the next queue 302 is empty, an empty area is not registered in the current queue 301 after all. That is, NO is determined in step S43, and an error message indicating that recording is not possible is displayed on the display unit 14 in step S44.

  As described above, in cyclic recording, by controlling data recording and data deletion, for example, when data at positions 12000 to 14000 is deleted as shown in the example of FIG. )), After the writing to the free area F ′, the free area K, the free area H, and the free area L is performed, the free area M (constant location) is not written. Can be prevented from being repeated. That is, the number of rewrites for each recording area of the optical disc 2 can be made equal.

  In addition, by managing the number of rewrites of each sector of the optical disc 2, it is conceivable to equalize the number of data rewrites to each sector. However, if the number of rewrites of 1 million sectors is counted by 2 bytes, A storage capacity of about 2 MB is required, and in order to determine the rewrite location based on the counted number of rewrites, a complicated calculation is required and it takes time until the determination is made. Is not realistic.

  On the other hand, in the present invention, the data to be stored is only the data in the current queue 301 to the recording start position column 304, and the rewrite location is determined based on the position of the empty area registered in the current queue 301. As a result, complicated calculations are not required.

  In the above example, when the free area rewrite management data is recorded at the time of activation as shown in FIG. 8 (step S12), the free area rewrite management data is stored in the current queue 301 or the next queue 302. Is registered on the optical disk 2 based on the data (recording start position) set in the recording start position column 304 in the free area rewriting management data (step S18). It is also possible to distribute and register the free area to the current queue 301 or the next queue 302.

  According to the above, the file is recorded by the cyclic recording method, and the order of the files to be recorded in the metadata area 202 is controlled at the time of recording the 2n-1th clip and the 2nth clip (respectively in the normal order). Therefore, it is possible to prevent repetitive writing to a certain place and suppress fragmentation of a free area and make reading faster.

  As a specific example, a first file (C clip information file 151-1 or A and B index files 134-1 and 135-1) and a second file (C clip information file 151-2 or A and B index files 134-2 and 135-2), and a third file (clip metadata file 162-1 of FIG. 5D) having a higher probability of being read from the first file and the second file, Of the fourth file (the clip metadata file 162-2 in FIG. 5D), the first file and the third file are set as one set, and the second file and the fourth file are set as one set. Consider the case of writing to (optical disc 2 in FIG. 1). First, an empty area of the recording area is determined as a file writing area so that the number of times of writing to the recording area of the recording medium (optical disc 2) is equal (first processing in step S32 in FIG. 12). In the determined file writing area, the first file and the third file are arranged in the order of the first file and the third file from the front side to the rear side of the physical address of the recording medium (optical disc 2). The writing order of the file is controlled so as to write the first file and the third file in the determined writing area in the controlled order in the controlled order (step S33 to step S35 in FIG. 12). Are written as a set (for example, the first processing in step S36 in FIG. 12). Next, after writing the first file and the third file, it is determined to write the second file and the fourth file as a set to the recording medium (the second time in step S32 in FIG. 12). In the file writing area (determined by the processing), the fourth file and the second file are arranged in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium. The writing order of the files is controlled so as to write (for example, the second processing of Step S33 to Step S35 in FIG. 12), and the fourth file and the second file are placed in the determined writing area in the controlled order. Are written as a set (for example, the second processing in step S36 in FIG. 12).

  As a result, the third file and the fourth file having a high probability of being read can be continuously recorded, and the reading speed during reproduction can be increased.

  Further, the order control unit 17 makes the third file (D clip metadata file 162-1 in FIG. 5D) and the fourth file (D clip metadata file 162-2 in FIG. 5) adjacent to each other. Control the order of writing files.

  As a result, the third file and the fourth file having a high probability of being read can be continuously recorded, and the reading speed during reproduction can be increased.

  Further, the probability of reading from the fifth file (C clip information file 151-3 or A and B index files 134-3 and 135-3) read with almost the same probability as the second file is read. When the higher sixth file (clip metadata file 162-3 in FIG. 5D) and the fifth file are further written as one set, the second file is positioned adjacent to the front side of the determined file writing area. When the file is recorded (when it is determined that the data immediately before the area to be written in step S33 in FIG. 12 is not in the normal order, that is, in the reverse order), the determined file writing area In addition, from the front side to the rear side of the physical address of the recording medium (optical disc 2), the fifth file and the sixth file are recorded. The file writing order is controlled so that the fifth file and the sixth file are written in the order of the files (step S34 in FIG. 12), and the third file is positioned adjacent to the front side of the determined file writing area. When the file is recorded (when it is determined in step S33 in FIG. 12 that the data immediately before the area to be written is aligned in the normal order), the front side of the physical address of the recording medium is set in the determined file writing area. The file writing order is controlled so that the sixth file and the fifth file are written in the order of the sixth file and the fifth file from the rear side to the rear side (step S35 in FIG. 12). In this order, the sixth file and the fifth file are written as a set in the determined file writing area.

  As a result, even if the area determined as the data writing area in the second step S32 is different from the area determined in the first step S32, the second step S32 A file that matches the file recorded at the position adjacent to the front side of the determined data writing area (the same type of file, the type of the file is a file with a high probability of being read, the file with a low probability of being read, and a file that is deleted) (3 types of files having a high probability), the order is controlled and recorded, so that fragmentation of the file can be suppressed and the reading speed at the time of reproduction can be increased.

  Further, the first file to the fourth file, the fifth file (A and B index files 134-1 and 135-1) and the sixth file (which are more likely to be deleted than the first to fourth files) and the sixth file ( Among the A and B index files 134-2 and 135-2), the first file (C clip information file 151-1), the third file, and the fifth file are grouped into the second file. When writing the file (C clip information file 151-2), the fourth file, and the sixth file as a set, from the front side to the rear side of the physical address of the recording medium in the determined file writing area Toward the fifth file, the first file, and the third file in this order, the fifth file, the first file, and the third file Writing order of files is controlled to write, in a controlled order, the write area of the determined file, fifth file, the first file and the third file, are written as a set. After that, when writing the second file, the fourth file, and the sixth file as a set to the recording medium, the determined file writing area is moved from the front side to the rear side of the physical address of the recording medium. The file writing order is controlled to write the fourth file, the second file, and the sixth file in the order of the fourth file, the second file, and the sixth file, and in the controlled order, The fourth file, the second file, and the sixth file are written as a set in the determined file writing area.

  Thereby, fragmentation of the file can be suppressed and the reading speed at the time of reproduction can be increased.

  In the above example, the case where the present invention is applied to the recording on the optical disk 2 has been described. However, the present invention is not limited to the optical disk, and the present invention can be applied to any recording medium that records information. Further, the present invention can be applied to any recording apparatus that records information on the recording medium.

  The series of processes described above can be executed by hardware or can be executed by software. In this case, the processing described above is executed by a personal computer 500 as shown in FIG.

  36, a CPU (Central Processing Unit) 501 performs various processes according to a program stored in a ROM (Read Only Memory) 502 or a program loaded from a storage unit 508 to a RAM (Random Access Memory) 503. Execute. The RAM 503 also appropriately stores data necessary for the CPU 501 to execute various processes.

  The CPU 501, ROM 502, and RAM 503 are connected to each other via an internal bus 504. An input / output interface 505 is also connected to the internal bus 504.

  The input / output interface 505 includes an input unit 506 including a keyboard and a mouse, a display including CRT and LCD, an output unit 507 including a speaker, a storage unit 508 including a hard disk, a modem, a terminal adapter, and the like. A communicator 509 is connected. A communication unit 509 performs communication processing via various networks including a telephone line and CATV.

  A drive 510 is connected to the input / output interface 505 as necessary, and a removable medium 521 made up of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately mounted, and a computer program read therefrom is It is installed in the storage unit 508 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. 36, this recording medium is not only composed of a package medium consisting of a removable medium 521 on which a program is recorded, which is distributed to provide a program to the user, separately from the computer. A ROM 502 in which a program is recorded and a hard disk including a storage unit 508 provided to the user in a state of being pre-installed in the apparatus main body.

  In the present specification, the step of describing a computer program includes not only processing performed in time series according to the described order but also processing executed in parallel or individually even if not necessarily processed in time series. Is also included.

1 is a block diagram illustrating a configuration example of a recording apparatus to which the present invention is applied. It is a figure which shows the example of the directory structure for managing the data by a file system. FIG. 3 is a diagram showing a more detailed configuration example of the directory structure shown in FIG. 2. It is a figure explaining a soft partition. It is a figure explaining a cyclic recording simply. It is a figure explaining the recording method in the case of recording the file to which this invention is applied. 3 is a flowchart for explaining editing processing of the recording apparatus in FIG. 1. It is a flowchart which shows the detail of the process of step S1 of FIG. It is a figure which shows the memory content of the memory | storage part of FIG. It is a figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is a flowchart which shows the detail of the process of step S3 of FIG. It is a flowchart which shows the detail of the process of step S5 of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. And FIG. 16 is a block diagram illustrating a configuration example of a personal computer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Recording device, 2 Optical disk, 11 Input data processing part, 12 Storage part, 13 Operation part, 14 Display part, 15 Drive, 16 Control part, 17 Order control part, 134,135 Index file, 151 Clip information file, 162 Clip Metadata file

Claims (6)

Of the first file and the second file, and the third file and the fourth file having a higher probability of being read from the first file and the second file, the first file and the third file In a recording apparatus that writes a file as a set and writes the second file and the fourth file as a set to a recording medium,
Determining means for determining a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium is equal;
The first file and the third file in the order of the first file and the third file from the front side to the rear side of the physical address of the recording medium in the file writing area determined by the determination unit Order control means for controlling the order of writing the files so as to write the third file;
Writing means for writing the first file and the third file as a set in the file writing area determined by the determining means in the order controlled by the order control means;
The order control means, when the first file and the third file are written by the writing means, and then writing the second file and the fourth file as a set to the recording medium, the determination In the file writing area determined by the means, the fourth file and the second file are arranged in the order of the fourth file and the second file from the front side to the rear side of the physical address of the recording medium. Control the order of writing files to write 2 files,
The writing means writes the fourth file and the second file as a set in the file writing area determined by the determining means in the order controlled by the order control means. Recording device. The recording apparatus according to claim 1, wherein the order control unit controls a file writing order so that the third file and the fourth file are adjacent to each other. In the case where the sixth file having a higher probability of being read than the fifth file that is read with substantially the same probability as the second file is read, and the fifth file are further written as a set,
The order control means includes
When the second file is recorded at a position adjacent to the front side of the file writing area determined by the determining means, the physical address of the recording medium is stored in the file writing area determined by the determining means. From the front side to the back side, the writing order of the files is controlled so that the fifth file and the sixth file are written in the order of the fifth file and the sixth file,
When the third file is recorded at a position adjacent to the front side of the file writing area determined by the determining means, the physical address of the recording medium is stored in the file writing area determined by the determining means. From the front side to the rear side, the writing order of the files is controlled so that the sixth file and the fifth file are written in the order of the sixth file and the fifth file,
The writing means writes the sixth file and the fifth file as a set in the file writing area determined by the determining means in the order controlled by the order control means. The recording apparatus according to claim 1. Of the first file, the fourth file, and the fifth file and the sixth file having a high probability of being deleted from the first to fourth files, the first file, the third file, And writing the fifth file as one set and writing the second file, the fourth file, and the sixth file as one set,
The order control means moves the fifth file, the first file, and the third file from the front side to the rear side of the physical address of the recording medium in the file writing area determined by the determination means. Controlling the writing order of the files to write the fifth file, the first file, and the third file in the order of
The writing means includes a set of the fifth file, the first file, and the third file in the file writing area determined by the determining means in the order controlled by the order control means. Write as,
The order control means is configured to write the second file, the fourth file, and the sixth file after the fifth file, the first file, and the third file are written by the writing means. When writing a file as a set to the recording medium, the fourth file and the second file are written in the file writing area determined by the determining means from the front side to the rear side of the physical address of the recording medium. Controlling the writing order of the files to write the fourth file, the second file, and the sixth file in the order of the sixth file;
The writing means sets one set of the fourth file, the second file, and the sixth file in the file writing area determined by the determining means in the order controlled by the order control means. The recording apparatus according to claim 1, wherein: Of the first file and the second file, and the third file and the fourth file having a higher probability of being read from the first file and the second file, the first file and the third file In a recording method of a recording apparatus, in which a file is a set, and the second file and the fourth file are written to a recording medium as a set,
A determination step of determining a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium is equal;
From the front side to the rear side of the physical address of the recording medium, the first file and the third file are sequentially written in the file writing area determined by the process of the determination step. An order control step for controlling a writing order of the files so as to write the files and the third file;
A writing step of writing the first file and the third file as a set to the file writing area determined by the processing of the determination step in the order controlled by the processing of the order control step;
In the processing of the order control step, after the first file and the third file are written by the processing of the writing step, the second file and the fourth file are written as a set to the recording medium. In this case, the fourth file, the second file, in the order from the front side to the rear side of the physical address of the recording medium, in the file writing area determined by the processing of the determination step. The file writing order is controlled to write the file No. 4 and the second file,
In the processing of the writing step, the fourth file and the second file are set as one set in the file writing area determined by the processing of the determination step in the order controlled by the processing of the order control step. A recording method characterized by being written. Of the first file and the second file, and the third file and the fourth file having a higher probability of being read from the first file and the second file, the first file and the third file A program for writing a file as a set and writing the second file and the fourth file as a set to a recording medium,
A determination step of determining a free area of the recording area as a file writing area so that the number of times of writing to the recording area of the recording medium is equal;
From the front side to the rear side of the physical address of the recording medium, the first file and the third file are sequentially written in the file writing area determined by the process of the determination step. An order control step for controlling a writing order of the files so as to write the files and the third file;
A process including a writing step of writing the first file and the third file as a set in the file writing area determined by the process of the determination step in the order controlled by the process of the order control step To the computer,
In the processing of the order control step, after the first file and the third file are written by the processing of the writing step, the second file and the fourth file are written as a set to the recording medium. In this case, the fourth file, the second file, in the order from the front side to the rear side of the physical address of the recording medium, in the file writing area determined by the processing of the determination step. The file writing order is controlled to write the file No. 4 and the second file,
In the processing of the writing step, the fourth file and the second file are set as one set in the file writing area determined by the processing of the determination step in the order controlled by the processing of the order control step. A program characterized by being written.

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