JP2007108853A - Information processor, information processing method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve continuous recording reproduction of data unrestricted by a file size permitted in a file system. <P>SOLUTION: A special code showing continuous recording into a new file is set to a first file allocation table before a recorded data amount of a file corresponding to recorded data into an information recording medium reaches the file size permitted in the file system, and a head cluster number corresponding to the new file is set into an entry position of a second file allocation table corresponding to a set entry position of the special code. This constitution provides continuous recording processing and reproduction processing of data applying a plurality of files unrestricted by the file size permitted in the file system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information processing apparatus, an information processing method, and a computer program. More specifically, the present invention relates to an information processing apparatus, an information processing method, and a computer program that realize recording and reproduction of data exceeding the maximum file size managed by a file system without generating special management data.

  For example, when information is recorded on a medium (information recording medium) such as a hard disk in a digital video camera or other information processing device, a process that applies management information of a recording data file, for example, a FAT (File Allocation Table) is performed. It is.

  Examples of the FAT include FAT16 and FAT32. These file systems manage recording position information, recording position chain information, and the like for each data file recorded on a medium (information recording medium). In file systems such as FAT16 and FAT32, there are restrictions on the maximum file size that can be set. Therefore, when the recording data size increases and exceeds a preset maximum file size, even a series of data is divided and recorded in two or more different files.

  Such a divided recording file needs to be identified as a related data file. For example, Patent Document 1 discloses a configuration in which an index data file that hierarchically accommodates index data for files recorded on a recording medium is set so that the relationship between the files recorded on the recording medium can be identified. ing.

However, in the configuration described in Patent Document 1, it is necessary to generate and manage an independent index data file for storing information about file relevance. In addition, when this index data file is deleted or destroyed, there is a problem that information relating to file relevance is lost.
JP 2002-278996 A

  The present invention has been made in view of the above-described problems, and changes the storage information of a file system that has been conventionally used without generating a new management information file, thereby allowing the maximum allowable file in the file system. An object of the present invention is to provide an information processing apparatus, an information processing method, and a computer program capable of maintaining and managing the relevance of files recorded in a plurality of files exceeding the size.

The first aspect of the present invention is:
An information processing device,
A recording control unit that performs information recording control on the information recording medium and executes processing for registering chain information relating to data recording positions in the information recording medium in a table,
The recording control unit
The information processing apparatus is configured to execute processing for recording the chain information of the preceding file and the succeeding file in the table in accordance with the switching of the data recording file.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the recording control unit is configured to execute a process of setting a special code indicating the presence of the subsequent file at the final chain information registration position of the preceding file in the table. It is characterized by that.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the recording control unit uses the first file allocation table and the second file allocation table as the cluster number chain information applied as calculation information of the data recording position in the information recording medium. A process for registering the file allocation table is executed, and before the recording data amount of the file set corresponding to the recording data for the information recording medium reaches the file size allowed in the file system, the first A special code indicating continuous recording in a new file is set in the file allocation table, and the first cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the set entry position of the special code. Set up and apply several different files Characterized in that the is configured to perform continuous recording processing of the data.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the recording control unit determines that the recording data amount of the file set corresponding to the recording data on the information recording medium reaches a file size allowed in the file system. When the determination is made, the processing is performed to record the special code without recording the EOF code indicating the end of data defined in the file system in the first file allocation table.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the recording control unit basically applies the second file allocation table as a copy information recording table of the first file allocation table, and The first cluster number setting process for different files is executed only for the second file allocation table entry corresponding to the special code recording entry in one file allocation table.

Furthermore, the second aspect of the present invention provides
An information processing device,
A chain controller that acquires chain information from a table in which chain information of data recording positions in the information recording medium is registered, and has a playback control unit that performs information playback control from the information recording medium according to the acquired information;
The reproduction control unit
The information processing apparatus has a configuration in which chain information between different files is acquired from the table, and continuous reproduction processing using a plurality of files is executed.

  Furthermore, in an embodiment of the information processing apparatus of the present invention, the reproduction control unit includes a first file allocation table and a first file allocation table in which chain information of cluster numbers applied as calculation information of a data recording position in the information recording medium is recorded. The cluster chain information acquisition process using the file allocation table of No. 2 is executed, and a special code indicating continuous recording to a continuous recording file different from the file being read is acquired from the first file allocation table In such a case, a process for obtaining the first cluster number corresponding to the continuous recording file from the entry of the second file allocation table corresponding to the set entry position of the special code is executed, and data acquisition / reproduction by continuous application of a plurality of files is executed. It must be configured to execute processing And features.

Furthermore, the third aspect of the present invention provides
An information processing method,
A recording control step for performing information recording control on the information recording medium and executing processing for registering chain information relating to data recording positions in the information recording medium in a table;
The recording control step includes
In accordance with the switching of the data recording file, the information processing method is characterized in that a process of recording the chain information of the preceding file and the succeeding file in the table is executed.

  Furthermore, in an embodiment of the information processing method of the present invention, the recording control step executes a process of setting a special code indicating the presence of the subsequent file at the final chain information registration position of the preceding file in the table. And

  Furthermore, in an embodiment of the information processing method of the present invention, in the recording control step, the chain information of cluster numbers applied as calculation information of the data recording position in the information recording medium is changed to the first file allocation table and the second information. A process for registering the file allocation table is executed, and before the recording data amount of the file set corresponding to the recording data for the information recording medium reaches the file size allowed in the file system, the first A special code indicating continuous recording in a new file is set in the file allocation table, and the first cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the set entry position of the special code. Set and multiple different And executes the continuous recording processing of the applied data file.

  Furthermore, in an embodiment of the information processing method of the present invention, when the recording data amount of the file set corresponding to the recording data on the information recording medium reaches a file size allowed in the file system in the recording control step. If it is determined, the special code is recorded without recording an EOF code indicating the end of data defined in the file system in the first file allocation table.

  Furthermore, in one embodiment of the information processing method of the present invention, in the recording control step, data registration is basically performed by applying the second file allocation table as a copy information recording table of the first file allocation table. And the first cluster number setting process for different files is executed only for the second file allocation table entry corresponding to the special code recording entry in the first file allocation table.

Furthermore, the fourth aspect of the present invention provides
An information processing method,
A chain control step of acquiring chain information from a table in which chain information of data recording positions in the information recording medium is registered, and performing playback control of information from the information recording medium according to the acquired information;
The reproduction control step includes
In the information processing method, chain information between different files is acquired from the table, and continuous reproduction processing using a plurality of files is executed.

  Furthermore, in an embodiment of the information processing method of the present invention, in the reproduction control step, a first file allocation table and a first file allocation table in which chain information of cluster numbers applied as calculation information of a data recording position in the information recording medium is recorded. The cluster chain information acquisition process using the file allocation table of No. 2 is executed, and a special code indicating continuous recording to a continuous recording file different from the file being read is acquired from the first file allocation table In such a case, a process for obtaining the first cluster number corresponding to the continuous recording file from the entry of the second file allocation table corresponding to the set entry position of the special code is executed, and data acquisition / reproduction by continuous application of a plurality of files is executed. Execute the process The features.

Furthermore, the fifth aspect of the present invention provides
A computer program for executing information recording processing control in an information processing apparatus;
A recording control step for performing information recording control on the information recording medium and executing processing for registering chain information relating to data recording positions in the information recording medium in a table;
The recording control step includes
The computer program is characterized in that it is set as a step for executing processing for recording the chain information of the preceding file and the succeeding file in the table in accordance with the switching of the data recording file.

Furthermore, the sixth aspect of the present invention provides
A computer program for executing information reproduction processing control in an information processing device,
A chain control step of acquiring chain information from a table in which chain information of data recording positions in the information recording medium is registered, and performing playback control of information from the information recording medium according to the acquired information;
The reproduction control step includes
The computer program is set as a step of acquiring chain information between different files from the table and executing a continuous reproduction process using a plurality of files.

  The computer program of the present invention is, for example, a storage medium or communication medium provided in a computer-readable format to a general-purpose computer system capable of executing various program codes, such as a CD, FD, MO, etc. Or a computer program that can be provided by a communication medium such as a network. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the computer system.

  Other objects, features, and advantages of the present invention will become apparent from a more detailed description based on embodiments of the present invention described later and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.

  According to the configuration of one embodiment of the present invention, in the information recording process on the information recording medium, the process of registering the chain information of the cluster numbers applied as the calculation information of the data recording position in the information recording medium in the file allocation table is executed. A special code indicating continuous recording to a new file is set in the first file allocation table before the recording data amount of the file corresponding to the recording data on the information recording medium reaches the file size allowed in the file system, Since the first cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the special code setting entry position, the file size allowed in the file system is not limited. Apply multiple files Continuous recording of data is realized.

  Further, according to the configuration of one embodiment of the present invention, the cluster allocation information is obtained by applying the file allocation table in which the cluster number chain information applied as the calculation information of the data recording position in the information recording medium is applied. When the information reproduction control from the information recording medium is performed, a special code setting entry is obtained when a special code indicating continuous recording to a continuous recording file different from the file being read is acquired from the first file allocation table. Since the first cluster number corresponding to the continuous recording file can be acquired from the entry of the second file allocation table corresponding to the position, the data acquisition / playback process in which a plurality of files are continuously applied by referring to the file allocation table is performed. Realized.

Details of the information processing apparatus, the information processing method, and the computer program of the present invention will be described below with reference to the drawings. The description will be made according to the following items.
1. 1. Outline of file system 2. File system utilization configuration example in information processing apparatus of the present invention (2.1) FAT configuration (2.2) Data recording and playback sequence (2.3) System configuration Configuration example of information processing device

[1. File system overview]
As described above, when information is recorded on a medium (information recording medium) such as a hard disk in a digital video camera, PC, or other information processing device, for example, management information of a recording data file, for example, FAT (File Allocation Table) ) Is applied. The FAT includes, for example, FAT16 and FAT32, and these file systems manage recording position information, recording position chain information, and the like for each data file recorded on the medium (information recording medium). The details of FAT16 / 32 are described in, for example, “Microsoft Extensible Firmware Initiative FAT32 File System Specification”.

  With reference to FIG. 1, the data structure when one partition is provided on the hard disk and formatted with FAT16 and FAT32 will be described. FIG. 1A shows a format by FAT16, and FIG. 1B shows a format by FAT32.

  As shown in FIG. 1A, the data structure of the FAT 16 is, in order from the first sector (LBA = 0), following the master boot record (MBR), the partition boot record (PBR), and the file allocation table 1 (FAT 1). The file allocation table 2 (FAT2) is recorded, and a plurality of clusters as data areas are set following the root directory entry.

  As shown in FIG. 1B, the data structure of FAT32 is, in order from the first sector (LBA = 0), following the master boot record (MBR), partition boot record (PBR), and file system information (FSinfo). A file allocation table 1 (FAT1) and a file allocation table 2 (FAT2) are recorded, and then a plurality of clusters as data areas are set.

  As shown in FIG. 2A, the master boot record (MBR) holds startup information and partition information, that is, a partition table including the start address and size information of each partition. The FAT16 and FAT32 data structures shown in FIG. 1 show an example in which there is only one partition. However, it is possible to manage a recording medium such as a hard disk by dividing it into a plurality of partitions. As shown in FIG. 2, a partition table including the start address and size information of each partition of a plurality of partitions is set.

  At the time of activation, first, an activation code (program) is read from the activation code area of the MBR. The read activation code of the MBR refers to the partition table in the partition table area formed immediately after the activation code shown in FIG. 2A, reads the information of the boot sector of the target partition, and An OS (Operating System) is activated by a sector code (program).

  A plurality of (for example, four) partition tables can be provided. As described above, each partition table holds information indicating the position (start address) and size (partition size) of each partition area formed by dividing the recording area of the hard disk, for example. A signature for the partition table is given to 2 bytes (0E, 0F) following the partition table area.

  The data structure of the partition table having a data length of 16 bytes (128 bits) is shown in FIG. The 8-byte area from the 0th byte to the 7th byte is a storage area for information used when the address is specified by the CHS method, and the 8-byte area from the 8th byte to the 15th byte is the LBA method. This is an information storage area used when specifying an address.

  In the CHS system, an address (position) on a recording medium (hard disk) is specified using three parameters of a cylinder (Cylinder), a head (Head), and a sector (Sector) as one set. In the LBA method, numbers (block addresses (logical addresses)) are assigned in order from, for example, 0 to each accessible unit block (for example, one sector unit) on the recording area of the hard disk. By designating, an address (position) on the recording area of the hard disk is designated.

  As shown in FIG. 2B, the storage area of information used when accessing by the CHS system is the 0th byte storage area for active flag information (hereinafter simply referred to as flag information), and the first byte to 3 bytes. Storage area for starting sector information used when the first 3 bytes are accessed by the CHS method, 4th byte is a storage area for partition type information (hereinafter simply referred to as type information), 5th to 7th bytes Is the storage area of the end sector information used when accessing by the CHS method.

  Further, as shown in FIG. 2B, the information storage area used when accessing by the LBA method is the storage area of the start sector information in which 4 bytes from the 8th byte to the 11th byte are used by the LBA method. , 4 bytes from the 12th byte to the 15th byte are a partition size storage area used in the LBA method.

  Note that the CHS method uses the physical structure of the hard disk as it is, and there are three parameters for addressing such as cylinder, head, and sector, so that the software processing becomes complicated. On the other hand, in the case of the LBA method, since it is designated by a single parameter called a block address, the address designation at the time of access is very simple. For this reason, the LBA method has become the main addressing method for hard disks, and the LBA method is also used for other recording media, for example, various memory cards that are becoming widely used as so-called removable media. More and more addresses can be specified. Note that the method applied in the information processing apparatus of the present invention may be either a CHS method or an LBA method.

  Management information such as a file name and recording date / time is set for each file recorded on the information recording medium. FIG. 3 shows information stored in a directory provided in each partition and the information structure of a directory entry formed for each file. This directory entry is information formed in a directory according to the formed file when a file is formed in the partition, and manages detailed information of the formed file.

  As shown in FIG. 3, the directory entry of each file includes a name (file name) field, an extended name field, an attribute field, a reservation field, a creation time field, a creation date field, a last access date field, and head cluster number instruction information. (High) field, recording time field, recording date field, head cluster number indication information (Low) field, and file size field, and corresponding information, that is, file name, extended name, attribute, creation time, creation date , Last access date, top cluster number (High), recording time, recording date, top cluster number (Low), and file size are managed. By using this directory entry information, the file specified by the file name is (1) what attribute it has, (2) where the starting cluster is, and (3) how big the file is. Yes, it is possible to manage (4) when it was created, (5) when it was last accessed, (6) when data was recorded, etc.

  The start cluster number is information for specifying a storage area in cluster units of the data area of the partition where the file data recording is started. In other words, the start cluster number indicates from which storage area of each storage area obtained by dividing the data area of the partition into cluster units, the data of the file is recorded. In the case of this example, as shown in FIG. 3, the leading cluster number is managed by dividing it into two bytes on the upper side (high side) and two bytes on the lower side (Low side).

  As shown in FIG. 1, the cluster is a minimum unit that is included in the data area and can manage data in the FAT, and means a minimum recording unit per file in which a plurality of sectors are collected. One cluster has a configuration in which n sectors (n = 1, 2, 4,... 64, 128) are collected (sector size = 512 bytes in the case of a hard disk). Since the sector, which is the minimum unit of the hard disk, is too small as a unit for managing files, file management is facilitated by using a unit area called a cluster in which a plurality of sectors are collected. The specific size of the cluster is, for example, 32 kilobytes for FAT16 and 4 kilobytes for FAT32.

  In the FAT data structure shown in FIG. 1, a partition boot record (PBR) including an activation code corresponding to a partition is set subsequent to the master boot record (MBR) described with reference to FIG. An allocation table 1 (FAT1) and a file allocation table 2 (FAT2) are stored.

  The file allocation table 2 (FAT2) has a conventional configuration that is used as spare data for the file allocation table 1 (FAT1). In the conventional file system, the file allocation table 2 (FAT2) includes a file allocation table. 1 (FAT1) copy data was stored. However, the file system according to the present invention has a special usage form, in which FAT2 is not simply a copy data storage table of FAT1. The FAT configuration of the present invention will be described later.

  First, a data configuration example of a general file allocation table (FAT) will be described with reference to FIG. The file allocation table (FAT) is a table for managing recording position information and recording position chain information for each data file recorded on a medium (information recording medium).

  As described above, the configuration data of each data file is distributed to one or more clusters and recorded on the information recording medium. The file allocation table (FAT) stores chain information of cluster numbers of clusters that store configuration data of each file.

The FAT shown in FIG. 4 is divided into two parts. Items indicated by double lines are indexes, and as data entries,
[00000000h] to [0000000Fh]
[00000010h] to [0000001Fh]
[00000020h] to [0000002Fh]
[00000030h] to [0000003Fh]
Indicates the cluster number. In the table shown in the figure, [h] is omitted, but the above [h] indicates that the cluster number indicated by the previous 8 digits of 0 to F is in hexadecimal notation.

  The cluster number storing the next data of the file configuration data is recorded at the position of the cluster number storing the configuration data of each file, and the code [0FFFFFFFh] indicating EOF (end of file) is recorded at the position of the final cluster number. Is done. The head cluster number is recorded in the directory entry of each file described with reference to FIG.

For example, the first cluster number recorded in the directory entry of each file is
First file: 00000007h
Second file: 0000000Ah
Third file: 0000001Bh
4th file: 0000002Ch
And

  Since the first cluster number of the first file is [00000007h], the first data of the first file can be acquired by reading the cluster with the cluster number [00000007h]. The cluster number in which the next configuration data of the first file is recorded can be known based on the recording information at the position of the FAT cluster number [00000007h] shown in FIG. It is found that the cluster number [00000008h] is recorded at the position of the FAT cluster number [00000007h] shown in FIG. 4, and the cluster number in which the next configuration data of the first file is recorded is [00000008h]. Data can be read from the cluster with the number [00000008h].

  Further, the cluster number in which the next configuration data of the first file is recorded is recorded at the position of the FAT cluster number [00000008h] shown in FIG. It is found that the cluster number [00000009h] is recorded at the position of the FAT cluster number [00000008h] shown in FIG. 4, and the cluster number in which the next configuration data of the first file is recorded is [00000009h]. Data can be read from the cluster with the number [00000009h]. Further, in order to obtain the cluster number in which the next configuration data is recorded, referring to the recording information at the position of the FAT cluster number [00000009h], a corresponding code [0FFFFFFFh] of EOF (end of file) is recorded, It turns out that there is no subsequent data.

As a result, the first file is
Cluster number: [00000007h] → [00000008h] → [00000009h] It is found that the cluster is stored.

Similarly,
The second file is
Cluster number: [0000000Ah] → [0000001Fh] → [00000025h] → [00000031h] → [00000030h]
The third file is
Cluster number: [0000001Bh] → [0000001h] → [00000012h] → [00000013h] → [00000014h] → [00000003h]
The fourth file is
Cluster number: [0000002Ch]->[0000002Dh]->[0000002Eh]->[0000002Fh]->[00000028h]->[0000009h]->[0000003Ah]-> [0000003Bh]
It becomes clear that the data is stored in the clusters designated by, and data can be acquired from these clusters.

  The FAT shown in FIG. 4 is a data example corresponding to the FAT32. In FAT32, the EOF (end of file) corresponding code is [0FFFFFFFh], while in FAT16, the EOF (end of file) corresponding code is [FFFFh]. By detecting the EOF (end of file) corresponding code, it is possible to determine that the file configuration data is finished.

Thus, each file recorded on the information recording medium is
(A) "Directory entry" that holds file name, creation date and time, file size, etc.
(B) “FAT” that holds cluster chain information
(C) “Data (substance of file)” recorded in cluster units
These are recorded on an information recording medium such as a hard disk, and based on “directory entry” and “FAT”, the cluster of each file can be identified and data can be read.

[2. Example of file system usage configuration of the present invention]
(2.1) Configuration of FAT Next, an example of a configuration using a file system in the information processing apparatus of the present invention will be described. As described above, file systems such as FAT16 and FAT32 have restrictions on the maximum file size that can be set. Therefore, if the recording data size increases and exceeds the preset maximum file size, the recording is stopped or divided into two or more different files for recording. For example, in the FAT32 file system, the maximum size per file is about 4 GB = 4,294,967,295B (a numerical value expressed as FFFFFFFFh when expressed in hexadecimal). For example, when a moving image is recorded at a fixed rate of 9 Mbps, the time that can be recorded in one file is about 63 minutes and 37 seconds. When a moving image is recorded at a fixed rate of 25 Mbps, the time that can be recorded in one file is about 24 minutes 54 seconds.

As described above, when the time that can be recorded in one file is limited, information recording is performed when the recording data size reaches the maximum allowable file size (for example, 4 GB) defined by the file system. The following two methods are conceivable as coping methods as the information processing apparatus.
(A) Stop recording.
(B) Recording is continued using a different file by closing the currently opened file and opening a new file.

  The setting of (B) corresponds to the configuration described in Patent Document 1 described above, and generates and manages an independent management information file for enabling identification of the related recording file as a divided recording file. It will be necessary. However, when this management information file is deleted or destroyed, there is a problem in that information relating to file relevance is lost.

  In the present invention, the storage information of a file system that has been used conventionally is changed without generating a new management information file, and the files recorded in a plurality of files exceeding the maximum allowable file size in the file system. Relevance can be maintained and managed.

  FIG. 5 shows a data configuration example of FAT1 and FAT2 when the present invention is applied. FAT1 and FAT2 shown in FIG. 5 are file allocation tables (FAT) according to FAT32, similar to the table described above with reference to FIG. Basically, FAT2 stores the copy data of FAT1. However, in the configuration of the present invention, data other than the copy data of FAT1 is stored in FAT2.

  Specifically, when a series of data is divided and recorded in a plurality of files, the presence of a continuous recording file different from the EOF code at the position where the EOF code indicating the end of the preceding file is stored in FAT1. Stores the special code indicated. Further, the first cluster number of the next file in which the divided data is recorded is stored in the FAT2 entry position corresponding to the FAT1 code storage position where the special code is detected.

  When a special code is detected from FAT1, the information processing apparatus that executes file data acquisition and reproduction processing acquires an entry in FAT2 corresponding to the code storage position of FAT1 in which the special code is detected. In the corresponding entry of FAT2, the leading cluster number of the next file in which the divided data is recorded is stored. By obtaining the head cluster number, the head cluster number of the stored data of different files in which the data is recorded can be obtained. Thereafter, returning to FAT1, the data can be sequentially acquired by following the cluster chain for the file data.

  In the example of FIG. 5, an example is shown in which data is divided and recorded in three different files. First, when data specifying a certain file is acquired and reproduced, the information processing apparatus acquires the first cluster number of the specified file. As described above, the head cluster number is recorded in the directory entry of each file described with reference to FIG. It is assumed that [00000010h] is acquired as the leading cluster number. Since the first cluster number of the file is [00000010h], the first data of the file can be acquired by first reading the cluster with the cluster number [00000010h].

  The cluster number in which the next component data of the file is recorded can be known based on the recording information at the position of the FAT1 cluster number [00000010h] shown in FIG. It is found that the cluster number [00000011h] is recorded at the position of the FAT cluster number [00000010h] shown in FIG. 5, and the cluster number in which the next configuration data of the first file is recorded is [00000011h]. Data can be read from the cluster having the number [00000011h]. In this way, the cluster number indicating the cluster chain is acquired from FAT1, and the configuration data of one file is sequentially acquired from each cluster. Finally, the entry data 101 of the FAT1 cluster number [0000001Fh] shown in FIG. 5 is acquired. The data at this position stores a special code indicating the presence of a continuous recording file different from the EOF code. In this example, the special code is [1FFFFFFFh].

  This special code [1FFFFFFFh] is a special code indicating the presence of a continuous recording file. When a special code is detected from FAT1, the information processing apparatus that executes file data acquisition and playback processing acquires FAT2 entry data corresponding to the code storage position of FAT1 in which the special code is detected. That is, the entry data 102 shown in FIG.

  The FAT2 corresponding entry data 102 stores the first cluster number of the next file in which the divided data is recorded. The entry data 102 shown in FIG. 5 is [00000020h]. This cluster number corresponds to the cluster number of the configuration data of the second file in which the divided data is recorded. The information processing apparatus can obtain the first cluster number and obtain the first cluster number of the data stored in different files in which the data is recorded. Thereafter, the process returns to FAT1 to follow the cluster chain for the file data. That is, the configuration data of the second file can be sequentially obtained by sequentially following the cluster chain from the entry data at the position [00000020h] of FAT1 in FIG.

  Further, the configuration data of the second file is sequentially acquired from each cluster, and finally, the entry data of FAT1 cluster number [0000002Fh] shown in FIG. 5 is acquired. The special code [1FFFFFFFh] indicating the presence of a continuous recording file different from the EOF code is also stored in the data at this position.

  As described above, this special code [1FFFFFFFh] is a special code indicating the presence of a continuous recording file, and the information processing apparatus that executes file data acquisition and reproduction processing stores the code storage position of FAT1 that detected the special code. FAT2 entry data corresponding to is obtained. That is, the corresponding entry of FAT2 is referred to along the dotted arrow shown in FIG.

  The corresponding entry of FAT2 stores the leading cluster number of the next file in which the divided data is recorded. In the example shown in FIG. 5, it is [00000030h]. This cluster number corresponds to the cluster number of the configuration data of the third file in which the divided data is recorded. The information processing apparatus can obtain the first cluster number and obtain the first cluster number of the data stored in different files in which the data is recorded. Thereafter, the process returns to FAT1, and the cluster chain of the data of the third file is followed. That is, the configuration data of the third file can be sequentially obtained by sequentially following the cluster chain from the entry data at the position [00000030h] of FAT1 in FIG.

  Finally, the entry data of FAT1 cluster number [0000003Fh] shown in FIG. 5 is acquired. The data at this position is an EOF code, that is, [0FFFFFFFh]. By acquiring this EOF code, it is determined that there is no subsequent data and the end of the data, and the acquisition of the file data is ended.

  As described above, when the device that executes the acquisition of the file data acquires the EOF code [0FFFFFFFF] indicating the end of data in the file system, it determines that the data is ended, and is a continuous recording file different from the EOF code. When the special code [1FFFFFFFFh] indicating the presence of the file is acquired from the FAT1, the first cluster number of the next file is acquired from the corresponding entry of the FAT2, and a different file is immediately opened. Can do. According to such a processing configuration, even a large amount of data can be divided and recorded in a plurality of files, and the processing at the time of data acquisition and reproduction may be only the FAT reference processing, which is efficient. Data processing is possible.

The above configuration is an example using the special code [1FFFFFFFFh] indicating the presence of a continuous recording file different from the EOF code [0FFFFFFFh]. In this example, the head code of the code represented in hexadecimal is [0] when it is EOF and [1] when it is a special code. As bit data,
In the EOF code, the upper 4 bits are [0000],
In the special code, the upper 4 bits are [0001].

  In the case of an information processing apparatus that executes information reproduction processing, when a cluster number whose upper 4 bits are [0001] is detected, processing for obtaining the first cluster number of the subsequent file is executed with reference to FAT2. In the setting shown in FIG. 5, a cluster in which FAT1 and FAT2 are applied and different files are applied: the first file (00000010h ~) → the second file (00000020h ~) → the third file (00000030h ~) Chain information can be acquired.

  The above-described example is a processing example when FAT32 is applied. In the case of FAT16, the EOF code is [FFFFh]. Also in the case of FAT16, a special code indicating the presence of a continuous recording file can be set to [1FFFh], for example, and the presence of the next file can be detected by this special code. The special code indicating the presence of the continuous recording file can be set in various ways by predefining it.

(2.2) Data Recording and Reproducing Sequence Next, with reference to a flowchart, a processing sequence of information recording processing and information reproducing processing in the information processing apparatus of the present invention will be described.

  First, an information recording processing sequence in the information processing apparatus of the present invention will be described with reference to FIG. 6 and FIG. FIG. 6 shows an entire sequence of information recording processing in the information processing apparatus of the present invention, and FIG. 7 is a flowchart for explaining the details of the file switching processing in processing step S210 shown in FIG.

  The flow of FIG. 6 will be described. First, the information processing apparatus that executes the information recording process for the information recording medium opens a data recording file in step S201, verifies the size of the recording data passed from the application in step S202, and in step S203. By recording the data passed from the application, it is determined whether or not the upper limit of the file size allowed by the file system is exceeded.

  If it is determined that it does not exceed, data recording is executed in step S204. In the data recording process, the cluster number is recorded on the FAT. Further, in step S205, it is determined whether or not all data recording has been completed. If there is unrecorded data, the process returns to step S202 to continue the data recording process. If it is determined in step S205 that all data recording has been completed, the data recording process ends.

  On the other hand, in the determination process of step S203, if it is determined that the upper limit of the file size allowed by the file system is exceeded by recording the data passed from the application, the file close / open process of step S210 is executed. This is a process of closing the data recording file that has approached the allowable file size in step S211, and opening a new file for executing continuous recording in step S212. In step S212, the new file is opened. If the file is opened, data recording for the file is executed in step S204.

  A detailed sequence of the file close / open process executed in step S210 will be described with reference to the flow of FIG. In the flow shown in FIG. 7, a file to be closed, that is, a file that is being recorded with data approaching an allowable file size is referred to as file A, and a new file that performs continuous recording is referred to as file B.

  First, in step S301, EOF is set in the final cluster of the file A to be closed as the editing process of FAT1. In the case of FAT32, it is [0FFFFFFFFh]. In step S302, EOF is set in the final cluster of the file A to be closed as the FAT2 editing process.

  Further, in step S303, the file A is closed, and in step S304, the cluster number in the FAT in which the EOF set in the FAT in steps S301 and S302 is set is stored in the memory.

  Next, in step S305, file B, which is a new file for recording continuous data, is opened. In step S306, the first cluster of file B is determined. Next, in step S307, as the FAT2 editing process, in step S302, the top cluster of file B in which continuous data is recorded at the FAT2 cluster position where the EOF code is set, that is, the top of file B determined in step S306. Record the cluster.

  Finally, in step S308, as a FAT1 editing process, in step S301, a special code indicating the existence of a file for recording continuous data is stored at the FAT1 cluster position where the EOF code is set. The special code is, for example, [1FFFFFFFh] in the above-described example.

  By this processing, the file closing and opening processing is completed, and continuous data can be sequentially recorded on the file B. If the recorded data continues and the file B exceeds the allowable file size, a new file C is opened by executing the flow shown in FIG. By these processes, data recording can be executed by applying new files one after another.

  Next, a processing sequence for acquiring and reproducing data divided and recorded in a plurality of files by the above-described processing will be described with reference to the flowchart shown in FIG.

  First, in step S501, the leading cluster number is obtained from the directory entry information of the file A to be played, and in step S502, the cluster chain of the file A is traced based on the FAT, and data is obtained sequentially.

  In step S503, it is determined whether or not a special code indicating a continuation file has been detected from the FAT1, and if no special code is detected, data is acquired until the EOF code is detected, and the data acquisition / reproduction process is terminated.

  If a special code indicating a continuation file is detected from FAT1 in step S503, the FAT2 entry corresponding to the cluster number entry of FAT1 in which the special code is detected is referenced in step S504, and is continuously recorded from the reference entry. The start cluster number X of the different file B is acquired.

  Next, in step S505, the file A is closed, and in step S506, a directory entry having X as the start cluster number is searched to detect the file B. Further, in step S507, the file B is opened, and in step S508, the cluster chain of the file B is traced based on the FAT, and data is sequentially acquired and reproduced.

(2.3) System Configuration Next, a system configuration of an information processing apparatus that performs the above-described processing will be described. Data recording to the information recording medium and data acquisition and reproduction processing from the information recording medium are performed by executing a predetermined data processing program by a CPU of an information processing apparatus such as a digital video camera or a PC.

  That is, as shown in FIG. 9, when data is recorded on an information recording medium 204 such as a hard disk, or when data recorded on the recording medium is read and used, it becomes a window for the user. Below the application program 201 are a file system (file management program) 202 for managing files on the information recording medium 204 and a device driver 203 for controlling the information recording medium 204 based on information from the file system.

  When data is recorded on the information recording medium 204 or data is reproduced from the information recording medium 204, data is written and reproduced by the functions of the file system 202 and the device driver 203. By the same processing as before, processing is performed with a configuration of file system⇔device driver⇔recording medium (hard disk).

  When a plurality of different files are applied as continuous recording files when data recording is performed, special codes are recorded in a file allocation table (FAT) applied by the file system. When a plurality of different files are applied as continuous recording files when data reproduction is executed, file switching is executed on condition that a special code is detected from the FAT.

  FIG. 10 shows a configuration diagram showing the file system in the system configuration shown in FIG. 9 in more detail. The configuration shown in FIG. 10 is a diagram showing the system configuration of an information processing apparatus that performs data recording on an information recording medium, data acquisition from the information recording medium, and reproduction processing, as in FIG. 9, and an information recording medium such as a hard disk 304 shows a system configuration of an information processing apparatus that records data to 304 or executes processing for reading out and using data recorded on a recording medium, in a lower layer of an application program 301 serving as a window with a user There are a file system (file management program) 302 for managing files on the information recording medium 304 and a device driver 303 for controlling the information recording medium 304 based on information from the file system.

  The application 301, the file system 302, and the device driver 303 access and use the memory 341 as a work area for storing programs and parameters necessary for processing of each component and data processing.

  The file system 302 holds mount drive information 311 including the type and format information of the recording medium, and executes data recording and reproduction control according to the drive information 311. The file system 302 includes a recording / playback control unit 320 that executes data recording / playback control, and a media control unit 330 that executes media control.

  The recording / playback control unit 320 includes a FAT control unit 321 that performs file allocation table (FAT) recording and reference processing, a cluster determination process as data recording position information, and a cluster that performs a playback position determination process based on the cluster number. It has a control unit 322 and a directory entry control unit 323 that executes a process for generating or referring to a directory entry (see FIG. 3) that stores information corresponding to a file. The directory entry control unit 323 acquires a directory entry corresponding to a specific file based on an instruction from the application 301. For example, in the case of file reproduction, the directory entry control unit 323 acquires the first cluster number from the directory entry and provides it to the cluster control unit 322. To do.

  The media control unit 330 has a position calculation unit 331, controls the device driver 303 based on the cluster information determined by the cluster control unit 322 and the cluster linkage information of FAT, and performs data recording or data reproduction according to the cluster number. The position of the disk to be executed is determined, and data recording or data reproduction from the disk position is executed via the device driver 303 according to the determined position information.

  FIG. 11 is an example of a system configuration different from the system configuration shown in FIG. 10, and shows an example in which the file system is distinguished into a core part and an interface part. The file system (core) 382 executes data transmission / reception with the application 301 via the file system (interface) 381. Other configurations are the same as those shown in FIG.

  In the configuration shown in FIG. 11, a processing sequence in the case where data recording is executed by successively applying different files to the information recording medium will be described with reference to FIGS.

  The sequence diagrams of FIGS. 12 and 13 show the application 301, the file system (interface) 381, the file system (core) 382, and the device driver 303 from the left, and the notification sequence of commands, data, and the like between the components is shown. It is shown in the series.

  First, when performing data recording, in step S701, a file open instruction is output from the application 301 to the file system (interface) 381, and further, the instruction is transmitted to the file system (core) 382. The file system (core) 382 searches for an empty cluster by applying the device driver 303 and creates a directory entry (DE) for a new file. As described above with reference to FIG. 3, the directory entry (DE) records a file name, a head cluster number, and the like.

  When these processes are completed, a process completion notification is notified to the application 301, and the application 301 starts writing data to the set file in step S702. afterwards. Data writing is continuously executed, and FAT write processing is executed under the control of the file system (core) 382 in step S703. As described above with reference to FIGS. 4 and 5, the FAT is configured as data in which chain information of cluster numbers in which file configuration data is written is written.

  Next, the sequence diagram of FIG. 13 will be described. When it is determined that the recording data reaches the upper limit of the file size allowed by the file system, the file system (interface) 381 requests the file system (core) 382 for file close processing in step S711.

  The file system (core) 382 completes the FAT writing in step S712 after the writing of the actual data that has been requested so far, and further executes the directory entry writing in step S713. These are writing processes of FAT data and directory entries corresponding to files for which data writing has been executed.

  When the file system (interface) 381 receives a notification of completion of these processes, the file system (interface) 381 executes a process of opening a new file for recording continuous data in step S714. 382 is notified.

  The file system (core) 382 searches for an empty cluster by applying the device driver 303 and creates a directory entry (DE) for a new file in which continuation data is recorded. As described above with reference to FIG. 3, the directory entry (DE) records a file name, a head cluster number, and the like.

  When these processes are completed, a process completion notification is notified to the application 301, and the application 301 starts writing data to the set file in step S715. afterwards. Data writing is executed continuously.

[3. Configuration example of information processing apparatus]
Next, as a configuration example of an information processing apparatus that performs the above-described processing, a configuration example of a digital video camera and a PC will be described with reference to FIGS.

  First, a configuration example of a digital video camera will be described with reference to FIG. The digital video camera captures an image and records image data obtained by capturing the image data on various information recording media such as a magnetic disk, an optical disk, a magneto-optical disk, and a semiconductor memory via the drive 432, and an image. It is provided with a VTR mode in which data supplied through the input / output unit 414, the audio input / output unit 416 or the communication unit 431 is recorded on a recording medium, and data recorded on the recording medium is reproduced. .

  The imaging mode includes a moving image imaging mode in which a moving image is captured and simultaneously recorded sound is recorded on a recording medium, and a still image imaging mode in which a still image is captured. In the VTR mode, the supplied data is recorded by operating the operation input unit 420 including a recording button switch, and the recording is performed on the recording medium by operating the playback button switch. The target data can be reproduced.

  As shown in FIG. 14, the digital video camera includes an optical lens unit 411, a photoelectric conversion unit 412, a camera function control unit 402, an image signal processing unit 413, an image input / output unit 414, a liquid crystal display 415, an audio input / output unit 416, Audio signal processing unit 417, communication unit 431, control unit (CPU) 401, built-in memory (RAM) 418, built-in memory (ROM) 419, operation input unit 420, drive 432 for the information recording medium, and power for each component A power supply 441 for supplying power is provided.

  A control unit (CPU) 401 executes processing according to various processing programs stored in the ROM 419. The RAM 418 is mainly used as a work area such as temporarily storing intermediate results in each process.

  The operation input unit 401 includes a mode switching key for switching operation modes such as a moving image shooting mode, a still image shooting mode, a VTR mode, a shutter key for shooting a still image, a shooting start key for shooting a movie, a recording key, Various operation keys and function keys such as a reproduction key, a stop key, a fast-forward key, and a fast-rewind key are provided, and an operation input from the user is received and an electric signal corresponding to the received operation input is transmitted to the control unit (CPU) 401. To supply.

  The control unit (CPU) 401 reads out and executes a program for performing a target process from the ROM 419 in accordance with an operation input from the user, and controls each unit to perform a process according to an instruction from the user. Take control. The digital video camera can mount various information recording media such as a magnetic disk, an optical disk, a magneto-optical disk, and a semiconductor memory as an information recording medium, and record various kinds of information on these information recording media via a drive 432. Also, the information recorded on these information recording media is reproduced.

  Next, a hardware configuration example of a PC as an example of an information processing apparatus that performs the above-described processing will be described with reference to FIG. A CPU (Central Processing Unit) 501 functions as a data processing unit that executes processing corresponding to an OS (Operating System), data recording using a different file described in the above-described embodiment, or data reproduction processing. These processes are executed according to a computer program stored in a data storage unit such as a ROM or a hard disk of the information processing apparatus.

  A ROM (Read Only Memory) 502 stores programs used by the CPU 501, calculation parameters, and the like. A RAM (Random Access Memory) 503 stores programs used in the execution of the CPU 501, parameters that change as appropriate during the execution, and the like. These are connected to each other by a host bus 504 including a CPU bus.

  The host bus 504 is connected to an external bus 506 such as a PCI (Peripheral Component Interconnect / Interface) bus via a bridge 505.

  A keyboard 508 and a pointing device 509 are input devices operated by the user. The display 510 includes a liquid crystal display device, a CRT (Cathode Ray Tube), or the like, and displays various types of information as text and images.

  An HDD (Hard Disk Drive) 511 includes a hard disk, drives the hard disk, and records or reproduces a program executed by the CPU 501 and information. The hard disk is used as, for example, a storage area for image data files, and stores various computer programs such as a data processing program.

  The drive 512 reads data or a program recorded on a removable recording medium 521 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, and the data or program is read out from the interface 507 and the external bus 506. , And supplied to the RAM 503 connected via the bridge 505 and the host bus 504.

  The connection port 514 is a port for connecting the external connection device 522 and has a connection unit such as USB or IEEE1394. The connection port 514 is connected to the CPU 501 and the like via the interface 507, the external bus 506, the bridge 505, the host bus 504, and the like. The communication unit 515 is connected to a network and executes communication with other information processing apparatuses.

  The configuration example of the information processing apparatus illustrated in FIGS. 14 and 15 is an example of the apparatus, and the information processing apparatus is not limited to the configuration illustrated in FIGS. 14 and 15, and executes the processing described in the above-described embodiments. Any configuration is possible.

  The present invention has been described in detail above with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the gist of the present invention. In other words, the present invention has been disclosed in the form of exemplification, and should not be interpreted in a limited manner. In order to determine the gist of the present invention, the claims should be taken into consideration.

  The series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing processing by software, the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run.

  For example, the program can be recorded in advance on a hard disk or ROM (Read Only Memory) as a recording medium. Alternatively, the program is temporarily or permanently stored on a removable recording medium such as a flexible disk, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disk, a DVD (Digital Versatile Disc), a magnetic disk, or a semiconductor memory. It can be stored (recorded). Such a removable recording medium can be provided as so-called package software.

  The program is installed on the computer from the removable recording medium as described above, or is wirelessly transferred from the download site to the computer, or is wired to the computer via a network such as a LAN (Local Area Network) or the Internet. The computer can receive the program transferred in this manner and install it on a recording medium such as a built-in hard disk.

  Note that the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary. Further, in this specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.

  As described above, according to the configuration of one embodiment of the present invention, in the information recording process on the information recording medium, the cluster number chain information applied as the calculation information of the data recording position in the information recording medium is displayed in the file allocation table. Before the recording data amount of the file corresponding to the recording data on the information recording medium reaches the file size allowed in the file system, continuous recording to the new file is performed in the first file allocation table. The file size allowed in the file system is set so that the special cluster code is set and the first cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the entry position of the special code. Is not limited to Continuous recording of data according to the multiple files can be achieved.

  Further, according to the configuration of one embodiment of the present invention, the cluster allocation information is obtained by applying the file allocation table in which the cluster number chain information applied as the calculation information of the data recording position in the information recording medium is applied. When the information reproduction control from the information recording medium is performed, a special code setting entry is obtained when a special code indicating continuous recording to a continuous recording file different from the file being read is acquired from the first file allocation table. Since the first cluster number corresponding to the continuous recording file can be acquired from the entry of the second file allocation table corresponding to the position, the data acquisition / playback process in which a plurality of files are continuously applied by referring to the file allocation table is performed. Realized.

It is a figure explaining the data structure at the time of formatting by FAT16 and FAT32. It is a figure explaining the data structure of a master boot record (MBR). It is a figure explaining the information structure of the directory entry formed for every file. It is a figure explaining the example of a data structure of a general file allocation table (FAT). It is a figure which shows the data structural example of FAT1 and FAT2 at the time of applying this invention. It is a figure which shows the flowchart explaining the information recording process sequence in the information processing apparatus of this invention. It is a figure which shows the flowchart explaining the file switching sequence performed in the information recording process in the information processing apparatus of this invention. It is a figure which shows the flowchart explaining the information reproduction sequence in the information processing apparatus of this invention. It is a figure explaining the system configuration | structure of the information processing apparatus which concerns on one Example of this invention. It is a figure explaining the system configuration | structure of the information processing apparatus which concerns on one Example of this invention. It is a figure explaining the system configuration | structure of the information processing apparatus which concerns on one Example of this invention. It is a figure explaining the information recording process sequence in the information processing apparatus of this invention. It is a figure explaining the information recording process sequence in the information processing apparatus of this invention. It is a figure explaining the structural example of the digital video camera as one Example of the information processing apparatus of this invention. It is a figure explaining the structural example of PC as one Example of the information processing apparatus of this invention.

Explanation of symbols

201 Application 202 File System 203 Device Driver 204 Information Recording Medium 301 Application 302 File System 303 Device Driver 304 Information Recording Medium 311 Mount Drive Information 320 Recording / Playback Control Unit 321 FAT Control Unit 322 Cluster Control Unit 323 Directory Entry Control Unit 330 Media Control Unit 331 Position calculation unit 341 Memory 381 File system (interface)
382 File system (core)
401 Control unit (CPU)
402 Camera Function Control Unit 411 Optical Lens Unit 412 Photoelectric Conversion Unit 413 Image Signal Processing Unit 414 Image Input / Output Unit 415 Liquid Crystal Display 416 Audio Input / Output Unit 417 Audio Processing Unit 418 Built-in Memory (RAM)
419 Internal memory (ROM)
420 Operation Input Unit 431 Communication Unit 432 Drive 441 Power Supply 501 CPU (Central Processing Unit)
502 ROM (Read-Only-Memory)
503 RAM (Random Access Memory)
504 Host bus 505 Bridge 506 External bus 507 Interface 508 Keyboard 509 Pointing device 510 Display 511 HDD (Hard Disk Drive)
512 drive 514 connection port 515 communication unit 521 removable recording medium 522 external connection device

Claims (16)

An information processing device,
A recording control unit that performs information recording control on the information recording medium and executes processing for registering chain information relating to data recording positions in the information recording medium in a table,
The recording control unit
An information processing apparatus configured to execute processing for recording chain information of a preceding file and a succeeding file in the table according to switching of a data recording file. The recording control unit
The information processing apparatus according to claim 1, wherein the information processing apparatus is configured to execute a process of setting a special code indicating the presence of a subsequent file at a final chain information registration position of the preceding file in the table. The recording control unit
A process for registering chain information of cluster numbers applied as data recording position calculation information in the information recording medium in the first file allocation table and the second file allocation table, and recording data on the information recording medium Before the recording data amount of the file set corresponding to the file size reaches the file size allowed in the file system, a special code indicating continuous recording to a new file is set in the first file allocation table, and the special data is set. The configuration is such that the start cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the set entry position of the code, and continuous recording processing of data to which a plurality of different files are applied is executed. Claims The information processing apparatus according to. The recording control unit
When it is determined that the recording data amount of the file set corresponding to the recording data for the information recording medium reaches the file size allowed in the file system, the EOF code indicating the data end specified in the file system is used. The information processing apparatus according to claim 3, wherein the processing for recording the special code is performed without recording in the file allocation table. The recording control unit
The second file allocation table is basically applied as a copy information recording table of the first file allocation table, and the second file allocation table corresponding to the special code recording entry in the first file allocation table is used. The information processing apparatus according to claim 3, wherein only the entry is configured to execute a process for setting a leading cluster number for different files. An information processing device,
A chain controller that acquires chain information from a table in which chain information of data recording positions in the information recording medium is registered, and has a playback control unit that performs information playback control from the information recording medium according to the acquired information;
The reproduction control unit
An information processing apparatus having a configuration in which chain information between different files is acquired from the table, and continuous reproduction processing using a plurality of files is executed. The reproduction control unit
A configuration for executing cluster chain information acquisition processing using a first file allocation table and a second file allocation table in which chain information of cluster numbers applied as calculation information of a data recording position in an information recording medium is recorded; The second file allocation table corresponding to the set entry position of the special code when the special code indicating the continuous recording to the continuous recording file different from the file being read is acquired from the first file allocation table. 7. The information processing according to claim 6, wherein a process for acquiring a head cluster number corresponding to a continuous recording file is executed from the entry of the file, and a data acquisition / reproduction process by continuous application of a plurality of files is executed. apparatus. An information processing method,
A recording control step for performing information recording control on the information recording medium and executing processing for registering chain information relating to data recording positions in the information recording medium in a table;
The recording control step includes
An information processing method comprising: executing a process of recording chain information of a preceding file and a succeeding file in the table according to switching of a data recording file. The recording control step includes
9. The information processing method according to claim 8, wherein a process of setting a special code indicating the presence of a subsequent file at a final chain information registration position of the preceding file in the table is executed. In the recording control step,
A process for registering chain information of cluster numbers applied as data recording position calculation information in the information recording medium in the first file allocation table and the second file allocation table, and recording data on the information recording medium Before the recording data amount of the file set corresponding to the file size reaches the file size allowed in the file system, a special code indicating continuous recording to a new file is set in the first file allocation table, and the special data is set. The first cluster number corresponding to the new file is set at the entry position of the second file allocation table corresponding to the set entry position of the code, and continuous recording processing of data to which a plurality of different files are applied is executed. 9. The feature of claim 8 Broadcast processing method. In the recording control step,
When it is determined that the recording data amount of the file set corresponding to the recording data for the information recording medium reaches the file size allowed in the file system, the EOF code indicating the data end specified in the file system is used as the first file. The information processing method according to claim 10, wherein the process of recording the special code is executed without recording in the file allocation table. In the recording control step,
Data registration is executed by applying the second file allocation table basically as a copy information recording table of the first file allocation table, and a second code corresponding to the special code recording entry in the first file allocation table is executed. 11. The information processing method according to claim 10, wherein a setting process of a leading cluster number for a different file is executed only for an entry in the file allocation table. An information processing method,
A chain control step of acquiring chain information from a table in which chain information of data recording positions in the information recording medium is registered, and performing playback control of information from the information recording medium according to the acquired information;
The reproduction control step includes
An information processing method comprising: acquiring chain information between different files from the table and executing a continuous reproduction process using a plurality of files. In the reproduction control step,
A configuration for executing cluster chain information acquisition processing using a first file allocation table and a second file allocation table in which chain information of cluster numbers applied as data recording position calculation information in an information recording medium is recorded; The second file allocation table corresponding to the set entry position of the special code when the special code indicating the continuous recording to the continuous recording file different from the file being read is acquired from the first file allocation table. 14. The information processing method according to claim 13, wherein a process of acquiring a head cluster number corresponding to a continuous recording file is executed from the entry of No. 5, and a data acquisition / playback process by continuous application of a plurality of files is executed. A computer program for executing information recording processing control in an information processing apparatus;
A recording control step for performing information recording control on the information recording medium and executing processing for registering chain information relating to data recording positions in the information recording medium in a table;
The recording control step includes
A computer program set as a step of executing processing for recording chain information of a preceding file and a succeeding file in the table in accordance with switching of a data recording file. A computer program for executing information reproduction processing control in an information processing device,
A chain control step of acquiring chain information from a table in which chain information of data recording positions in the information recording medium is registered, and performing playback control of information from the information recording medium according to the acquired information;
The reproduction control step includes
A computer program set as a step of acquiring chain information between different files from the table and executing a continuous reproduction process using a plurality of files.

Images