JP2006215639A - Data control method and information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent two or more files with the same overlappable information from existing within a second storage area 109. <P>SOLUTION: An information processor 101 includes a transmission instruction part 111 for sending overlappable information in a first file 108 in a first storage area 107 and overlappable information in a second file in the second storage area 109 to an overlappable information comparing part 112; an overlappable information comparing part 112 for comparing the overlappable information in the first file 108 with the overlappable information in the second file and determining whether or not they are the same; and a transfer inhibiting part 113 for inhibiting the transfer of the first file 108 into the second storage area 109 if the overlappable information in the first file 108 is determined to be the same as the overlappable information in the second file. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a data control method and an information processing apparatus in which a program for executing the method is recorded.

Conventionally, various file systems have been adopted for data management in information processing apparatuses and external recording media.
In these file systems, since the file name is information that is not allowed to be duplicated in the same directory, duplication of the file name in the same directory is avoided by various methods. (For example, Patent Document 1)
Hereinafter, a conventional information processing apparatus will be described.
First, when the user issues a transfer request command for the first file in the first directory to the second directory, the transmission instruction unit displays the name of the first file and the name of the file in the second directory. To the name comparison unit.
Next, a name comparison part compares the name of a 1st file with the name of the file in a 2nd directory, and determines whether both are the same.
When it is determined that both are the same, the name of the file in the second directory is converted by converting the name of the first file into a name that does not overlap with the names of all the files in the second directory. Duplicate names are avoided.

JP-A-6-153140

However, because of file system management, file duplication information such as file contents and file size information is information that is allowed to be duplicated in the same directory. Even if the duplicatable information of the second file is the same, the first file has been transferred into the second directory.
Accordingly, as a result of the transfer of the first file into the second directory, two or more files having the same duplicatable information exist in the second directory. That is, since the capacity of the recording medium of the file transfer destination is limited, the capacity of the recording medium of the file transfer destination is reduced by the presence of two or more files having the same duplicatable information in the transfer destination directory. There was a problem that the capacity of one file was wasted.

In order to solve the above problems, in the information processing apparatus of the present invention, when a transfer request command is issued so that the first file in the first storage area is transferred to the second storage area, duplication is possible. The information comparison unit compares the duplicatable information of the first file with the duplicatable information of the file in the second storage area, and determines whether or not both are the same. When it is determined that both are the same, the transfer prohibition unit prohibits the first file from being transferred into the second storage area. The storage area here is a directory storage area or a recording medium storage area.
Accordingly, when the duplicatable information of the first file and the duplicatable information of the second file in the second storage area are the same, the first file is not transferred into the second storage area.

In the information processing apparatus of the present invention, when a transfer request command is issued so that the first file in the first storage area is transferred to the second storage area, the first file is changed to the second file. Instead of prohibiting transfer to the storage area, an overwriting unit for overwriting the second file with the first file is provided.
Therefore, it is possible to prevent two or more files having the same duplicatable information from existing in the second storage area, and to save the capacity of the recording medium to which the file transfer is scheduled by the capacity of the first file. it can.

Further, in the information processing apparatus of the present invention, when a transfer request command is issued so that the first file in the first storage area is transferred to the second storage area, first, the duplicatable small capacity information comparison is performed. Compares the duplicatable small capacity information of the first file in the first storage area with the duplicatable small capacity information of the file in the second storage area, and determines whether or not they are the same To do. When it is determined that they are the same, the content comparison unit compares the content of the first file with the content of the file in the second storage area, and whether or not they are the same. Determine.
Therefore, whether or not the first file is prohibited from being transferred into the second storage area by comparing the contents only when the duplicatable small capacity information having a capacity smaller than the contents is the same. The determination of whether or not can be performed in a shorter time.

  Furthermore, in the information processing apparatus of the present invention, whether or not to prohibit the transfer of the first file into the second storage area is in accordance with an external input. Alternatively, in the information processing apparatus according to the present invention, whether to overwrite the second file with the first file is in accordance with an external input. That is, when the duplicatable information of the first file and the duplicatable information of the file in the second storage area are the same, whether transfer is prohibited or whether the second file is overwritten. This can be arbitrarily selected by the user.

  Therefore, when the duplicatable information of the first file and the duplicatable information of the second file in the second storage area are the same, the user wants to transfer the first file into the second storage area. When the first file is transferred, and the user does not want to transfer the first file into the second storage area, the first file is prohibited from being transferred to the second storage area. be able to. In addition, when the user wants to overwrite the second file with the first file, the second file is overwritten. When the user does not want to overwrite the second file with the first file, the second file is overwritten. Is not overwritten.

  According to the present invention, it is possible to prevent the existence of two or more files having the same duplicatable information in the second storage area, and to save the capacity of the recording medium to which the file transfer is scheduled by the capacity of the first file. it can.

FIG. 1 is a block diagram of an information processing apparatus according to this embodiment.
The structure of the information processing apparatus in this embodiment will be described with reference to FIG.
In the information processing apparatus 101 illustrated in FIG. 1, an internal storage unit 102, an MPU 103 that controls the entire information processing apparatus 101, a DMA 104 that performs file transfer processing, and a removable external recording medium 105 include a system bus 106. Connected through.
Data in the internal storage unit 102 is managed by a file system. A first directory 107 exists in the internal storage unit 102 employing the file system, and a first file 108 exists in the first directory 107. A second directory 109 exists in the external recording medium 105, and a file 110 exists in the second directory 109.
Although only the first directory 107 is shown in the internal storage unit 102, a plurality of directories may exist. In addition, although only the second directory 109 is illustrated in the external storage medium 105, a plurality of directories may exist.

Next, the structure in the internal storage unit 102 adopting the file system will be described in detail with reference to FIG. Note that the information processing apparatus 101 in the present embodiment employs a file system called a FAT file system.
As shown in FIG. 2, the internal storage unit 201 adopting the FAT file system has a data area 202, a directory entry area 203, and a FAT area 204.

The file has various information such as file contents, name, size information, extension, file type information, application information, creation time information, creation date information, update date information, access date information, and creator information. Yes.
Of these various pieces of information of the file, the contents of the file are recorded in the data area 202 in units of clusters.
In other words, the content of the file is information representing the substantial content of the file.
Among various file information, the file name, size information, extension, file type information, application information, creation time information, creation date information, update date information, access date information, creator information, etc. are directory entries. It is recorded in area 203.

Among these pieces of information held by the file system, the file name is information that is not allowed to be duplicated in the same directory.
On the other hand, the file contents, size information, extension, file type information, application information, creation time information, creation date information, update date information, access date information, creator information, etc. are the same in the management of the file system. Duplicate information that allows duplicate files to exist in the directory.
Of these duplicatable information, file size information, extension, file type information, application information, creation time information, creation date information, update date information, access date information, creator information, etc. It is the small capacity information that can be duplicated, which is information of a capacity smaller than the content capacity.

In the FAT area 204, identifiers of clusters constituting the file contents are recorded.
Next, returning to FIG. 1, the structure in the MPU 103 will be described.
The MPU 103 includes a transmission instruction unit 111, a duplicatable information comparison unit 112, and a transfer prohibition unit 113. The transmission instruction unit 111, the duplication possible information comparison unit 112, and the transfer prohibition unit 113 are connected to the system bus 106. It is connected.
The transmission instructing unit 111 transmits the duplicatable information of the first file 108 and the duplicatable information of the file 110 in the second directory 109 to the duplicatable information comparing unit 112.
The duplicatable information comparison unit 112 compares the duplicatable information in the first file 108 with the duplicatable information in the file 110 in the second directory 109.
In addition, the transfer prohibition unit 113 prohibits the first file 108 from being transferred into the second directory 109. Note that file transfer means file copying, file movement, file saving, or the like.

In the case of file copying, the MPU 103 or the DMA 104 reads various information of the directory entry of the designated file and the contents of the data area from the internal storage unit 102 and sends the contents of the file to the external recording medium 105 via the system bus 106. And various information of the directory entry are written.
In the case of moving a file, various information of the directory entry of the designated file and the contents of the data area are read from the internal storage unit 102 by the MPU 103 or the DMA 104, and the contents of the file are transferred to the external recording medium 105 via the system bus 106. And various information of the directory entry are written. In addition, various information of the directory entry of the designated file in the internal storage unit 102 is deleted, and the data area occupied by the designated file in the internal storage unit 102 is released. That is, the designated file in the internal storage unit 102 is deleted.

Next, the operation of the information processing apparatus according to the present embodiment will be described with reference to FIG.
FIG. 3 is a flowchart of the operation of the information processing apparatus according to this embodiment.
Consider the case where a user attempts to transfer the first file 108 in the first directory 107 into the second directory 109. That is, the first storage area of the transfer source is the first directory 107, and the second storage area of the transfer destination is the second directory 109.
First, when a transfer request command is issued so that the first file 108 is transferred into the second directory 109 by the user, the first file 108 is specified as the file to be transferred, and the first file 108 is specified. The second directory 109 is specified as the transfer destination directory (S302).
Next, it is determined whether or not one or more files 110 exist in the second directory 109 (S303).
As a result of step S303 (S304), when it is determined that no file exists in the second directory 109, the contents and various information of the first file 108 are read by the MPU 103 or the DMA 104 (S309), Various types of information such as the contents of the first file 108 are written in the second directory 109 (S310). That is, the first file 108 is transferred into the second directory 109.

As a result of step S303 (S304), when it is determined that one or more files 110 exist in the second directory 109, the transmission instructing unit 111 sets the duplication possible information of the first file 108 and the second directory. The duplication possibility information of the file 110 in 109 is transmitted to the duplication possibility information comparison unit 112 (S305).
In step S303, the duplication possibility information transmitted to the duplication possibility information comparison unit 112 includes file contents, size information, extension, file type information, application information, creation time information, creation date information, update date information, One of access date / time information and creator information, or a plurality of information selected from these.
However, the duplication possibility information of the first file 108 transmitted to the duplication possibility information comparison unit 112 and the duplication possibility information of the file 110 in the second directory 109 transmitted to the duplication possibility information comparison unit 112 are the same type. Duplicate information. For example, if the duplicatable information of the first file 108 transmitted to the duplicatable information comparison unit 112 is the content, the duplication of the file 110 in the second directory 109 is transmitted to the duplicatable information comparison unit 112. Information is also content.

Next, the duplication possibility information comparison unit 112 compares the duplication possibility information of the first file 108 with the duplication possibility information of the file 110 in the second directory 109, and determines whether or not both are the same. (S306).
As a result of step S306 (S307), when it is determined that the duplication possibility information of the first file 108 and the duplication possibility information of all the files in the second directory 109 are not the same, the MPU 103 or the DMA 104 performs the first File 108 is transferred into the second directory 109 (S309, S310), and the flow ends (S311).
On the other hand, as a result of step S306 (S307), when it is determined that they are the same, that is, the duplicatable information of the first file 108 and the duplicatable information of the second file in the second directory 109 are displayed. When it is determined that they are the same, the transfer prohibition unit prohibits the first file 108 from being transferred into the second directory 109 (S308), and the flow ends (S311).
Note that the second file here is a file in the second directory 109 having the same duplicatable information as that of the first file 108.
That is, if a second file having duplication information identical to the duplication information of the first file 108 exists in the second directory 109, the first file 108 is in the second directory 109. Not transferred.
Accordingly, it is possible to prevent two or more files having the same duplicatable information from existing in the second directory 109, and to reduce the capacity of the external recording medium 105 to which the file transfer is scheduled as much as the capacity of the first file 108. Can be saved.

In particular, when the duplicatable information compared in step S306 includes the contents of the file, it is determined that the contents of the first file 108 and the contents of the second file in the second directory 109 are the same. In some cases, the transfer of the first file 108 into the second directory 109 is prohibited, so that it is possible to prevent two or more files having the same contents from existing in the second directory 109.
Further, the duplicatable information to be compared in step S306 is any one of file size information, creation time information, creation date information, update date information, access date information, or a plurality of information selected from them. In some cases, the contents of the first file 108 and the contents of the second file in the second directory 109 may be the same if the duplicatable information compared by the duplicatable information comparison unit 112 is the same. High nature. Accordingly, the duplicatable information comparison unit 112 compares any one of the file size information, creation time information, creation date information, update date information, access date information, or a plurality of pieces of information selected from them. In the second directory 109, it is determined whether or not both are the same, and when the two are the same, the first file 108 is prohibited from being transferred into the second directory 109. It is possible to prevent two or more files having the same contents from existing. Further, since the capacity of the duplicatable information of the files compared by the duplicatable information comparing unit 112 is smaller than the capacity of the file contents, the time required for the comparison process can be shortened.

In step S306, when it is determined that the second file having the same duplicatable information as the first file 108 exists in the second directory 109, the comparison process is terminated. Also good. Accordingly, since it is not necessary to compare the duplicatable information of the first file 108 with the duplicatable information of all the files in the second directory 109, the time required for the comparison process can be shortened.
Step S305 and step S306 may be repeated for each file in the second directory 109. That is, for each file in the second directory 109, the transmission instruction unit 111 sends the duplication possible information of the first file 108 and the duplication possible information of the file in the second directory 109 to the duplication possible information comparison unit 112. The duplication possibility information comparison unit 112 may compare the duplication possibility information of the first file 108 with the duplication possibility information of the file in the second directory 109 and determine whether or not both are the same. .
Accordingly, the duplicatable information of the files that are not compared is not transmitted to the duplicatable information comparing unit 112, so that the time required for the comparison process can be shortened.

Next, the process of the duplication possible information comparison part 112 of step S306 is demonstrated using FIG. 4, referring the numbering of FIG.
When the process of the duplicatable information comparison unit 112 starts (S401), the duplication possibility of the file 110 in the second directory 109 represented by the binary number from the duplicatable information of the first file 108 represented by the binary number is possible. Information is drawn (S402). In step S402, the duplicatable information of the first file 108 expressed in binary may be subtracted from the duplicatable information of the file 110 in the second directory 109 expressed in binary. Note that all information in the information processing apparatus 101 is expressed in binary numbers.

As a result of step S402 (S403), when the output value is not 0, it is determined that the duplicatable information of the first file 108 and the duplicatable information of the file 110 in the second directory 109 are not the same, and the duplicatable information The processing result of the comparison unit 112 is “not identical”, and the process of the duplicatable information comparison unit 112 ends (S404). That is, in FIG. 3, when it is determined that the duplicatable information is not the same as a result of step S306 (S307), the flow proceeds to the process of step S309.
On the other hand, as a result of step S402 (S403), when the output value is 0, it is determined that the duplicatable information of the first file 108 and the duplicatable information of the file 110 in the second directory 109 are the same. The process result of the duplicatable information comparison unit 112 becomes “same”, and the process of the duplication possible information comparison unit 112 ends (S405). That is, in FIG. 3, when it is determined that the duplicatable information is the same as a result of step S306 (S307), the flow proceeds to the process of step S308.
Therefore, it is determined whether or not the difference between the duplicatable information of the first file 108 converted into the binary number and the duplicatable information of the file in the second directory 109 converted into the binary number is zero. As a result, it is possible to determine whether or not the duplicatable information of the first file 108 and the duplicatable information of the file in the second directory 109 are the same.

(Modification)
FIG. 5 is a block diagram of an information processing apparatus in a modification of the present embodiment.
The structure of the information processing apparatus in this modification will be described with reference to FIG. Unless otherwise specified, the structure of the information processing apparatus in the best embodiment is the same as that of the best embodiment, and a duplicate description is omitted.
In the best mode of the information processing apparatus according to the present modification, the MPU 503 does not have the duplicatable information comparison unit 112, but the content comparison unit 512 and the duplicatable small capacity. This is a point having an information comparison unit 514.
The content comparison unit 512 and the duplicatable small capacity information comparison unit 514 are connected to the system bus 506.

Next, the transmission instruction unit 511, the duplicable small capacity comparison unit 514, and the content comparison unit 512 in this modification will be described.
The transmission instructing unit 511 transmits the duplicatable small capacity information of the first file 508 and the duplicatable small capacity information of the file 510 in the second directory 509 to the duplicatable small capacity information comparing unit 514, and The contents of the file 508 and the contents of the file 510 in the second directory 509 are transmitted to the contents comparison unit 512.
Then, the duplicatable small capacity information comparison unit 514 compares the duplicatable small capacity information of the first file 508 with the duplicatable small capacity information of the file 510 in the second directory 509, and determines whether or not they are the same. judge.
The content comparison unit 512 compares the content of the first file 508 with the content of the file 508 in the second directory 509.
The duplicable small capacity information comparison unit 514 and the content comparison unit 512 are a kind of duplication possible information comparison unit.

Next, the operation of the information processing apparatus according to this modification will be described with reference to FIG. Unless otherwise specified, the operation is the same as that of the information processing apparatus according to the best embodiment, and a duplicate description is omitted.
FIG. 6 is a flowchart of the operation of the information processing apparatus in this modification.
Steps S601 to S602 are the same as the operation of the information processing apparatus in the best embodiment, and are therefore omitted.

In step S603, when it is determined that one or more files 510 exist in the second directory 509 (S604), the transmission instruction unit 511 determines that the duplicatable small capacity information of the first file 508 and the second information The duplicatable small-capacity information of the file 510 in the directory 509 is transmitted to the duplicatable small-capacity information comparison unit 514 (S612).
In step S612, the duplicatable small capacity information transmitted to the duplicatable small capacity information comparing unit 514 includes file size information, extension, file type information, application information, creation time information, creation date information, and update date and time. Information, access date / time information, creator information, or a plurality of pieces of information selected from these. However, duplication possible small capacity information of the first file 508 transmitted to the duplicatable small capacity information comparison unit 514 and duplication of the file 510 in the second directory 509 transmitted to the duplication possible small capacity information comparison unit 514. The possible small capacity information is the same type of duplicatable small capacity information. For example, when the duplicatable small capacity information of the first file 508 transmitted to the duplicatable small capacity information comparing unit 514 is size information, the second directory 509 is transmitted to the duplicatable small capacity information comparing unit 514. The information on the small capacity that can be duplicated in the file 510 is also size information.

Next, the duplicatable small capacity information comparison unit 514 compares the duplicatable small capacity information of the first file 508 with the duplicatable small capacity information of all the files in the second directory 509, and both are the same. It is determined whether or not there is (S613).
Note that the processing in the duplicatable small capacity information comparison unit 514 is the same as the processing in the duplication possible information comparison unit 112 described with reference to FIG.
As a result of step S613 (S614), when it is determined that they are not the same, that is, the duplicatable small capacity information of the first file 508 and the duplicatable small capacity information of all the files in the second directory 509 are obtained. When it is determined that they are not identical, the MPU 503 or the DMA 504 transfers the first file 508 into the second directory 509 (S609, S610), and the flow ends (S611).
On the other hand, if the result of step S613 (S614) indicates that both are the same, the transmission instruction unit 511 displays the contents of the first file 508 and the contents of the file 510 in the second directory 509 as contents. The data is transmitted to the comparison unit 512 (S605). Note that only files whose contents are transmitted to the content comparison unit 512 in step S605 are determined to have the same duplicatable small capacity information as the duplicatable small capacity information of the first file 508 in step S613. It is.

Then, the content comparison unit 512 compares the content of the first file 508 with the content of the file 510 in the second directory 509 and determines whether or not they are the same (S606). Note that the file whose contents are compared with the contents of the first file 508 in step S606 is determined to have the same duplicatable small capacity information as the duplicatable small capacity information of the first file 508 in step S613. Only files
That is, before the file contents are compared with each other, the duplicatable small-capacity information having a smaller capacity than the file contents are compared with each other. Accordingly, in the second directory 509, a file that does not have the same duplicatable small capacity information as the duplicatable small capacity information of the first file 508 has the same contents as the contents of the first file 508. Since the contents are not compared with the first file 508, the time required for the comparison process can be shortened.

As a result of step S606 (S607), when it is determined that both are the same, the transfer prohibition unit 513 prohibits the first file 508 from being transferred into the second directory 509 (S608), The flow ends (S611).
On the other hand, if it is determined in step S606 (S607) that they are not the same, the MPU 503 or DMA 504 transfers the first file 508 to the second directory 509 (S609, S610), and the flow ends. (S611).
Therefore, it is possible to prevent two or more files having the same contents from existing in the second directory 509, and to save the capacity of the external recording medium 505 that is a file transfer scheduled destination by the capacity of the first file 508. be able to.

Embodiments of the present invention will be described below with reference to the drawings.
Example 1
FIG. 7 is a block diagram of the information processing apparatus according to the first embodiment.
The structure of the information processing apparatus according to the first embodiment will be described with reference to FIG.
The information processing apparatus 701 in the first embodiment is a mobile phone.

An MPU 702 that controls the entire information processing apparatus 701, a ROM 703 that stores a control program, and a RAM 704 that provides a work area necessary for executing the control program are connected via a system bus 705.
Further, a CCD camera unit 706 that captures an image and generates an image frame file from the captured image is connected to the system bus 705 via a CCD camera interface 707.

Further, an operation switch 708 to which an operation command is input by the user and an LCD display panel 709 for displaying an image captured by the CCD camera unit 706 during photographing standby or the contents of an image file are provided via the operation panel interface 710. Connected to the system bus 705.
Furthermore, the calendar IC 711 that provides date and time information and the image frame file generated by the CCD camera unit 706 are JPEG compressed to generate a JPEG image file, and the JPEG image file is decoded to generate an image frame file. A decode / encode engine 712 is provided.

An image file or the like is recorded, and an internal storage unit 713 using a nonvolatile memory is provided. As an external recording medium, a removable nonvolatile memory card 714 is provided.
Further, a memory card interface 715 that connects the memory card 714 and the system bus 705 and a DMA 716 that performs file transfer are provided.
The ROM 703, the RAM 704, the CCD camera interface 707, the operation panel interface 710, the calendar IC 711, the image decoding / encoding engine 712, the nonvolatile memory 713, the memory card interface 715, and the DMA 716 are connected to the system bus 705. And can be controlled from the MPU 702.

When the information processing apparatus 701 is turned on, the MPU 702 reads a control program from the ROM 703, initializes the RAM 704 and each input / output device, mounts the internal storage unit 713 on the file system, and processes the information processing. The device 701 transitions to a file accessible state.
Further, the MPU 702 confirms the connection of the memory card 714, the memory card 714 is mounted on the file system, an application necessary for the operation of the system is started, and the information processing apparatus 701 operates the operation switch 708 from the user. Transition to the idle state to wait.

Here, when the user performs an activation operation of the image capturing application, the MPU 702 activates the CCD camera unit 706, and the information processing apparatus 701 transitions to a photographing standby state.
Next, an operation in the information processing apparatus 701 in the shooting standby state will be described.
The image frame file generated by the CCD camera unit 706 is transferred to the display frame buffer area of the RAM 704 by the DMA 716 via the CCD camera interface 707, and after the transfer is completed, the operation panel interface 710 is transferred from the display frame buffer area of the RAM 704 by the DMA 716. To the LCD display panel 709. The image frame file generated by the CCD camera unit 706 is displayed on the LCD display panel 709. These operations are repeated until the user performs a shutter operation for taking a picture.

In such a shooting standby state, when the user performs a shutter operation with the operation switch 708 for taking a picture, the image frame file transfer operation by the DMA 716 is started after completion of the image frame file transfer operation by the current DMA 716. Is paused. The image frame file in the display frame buffer area of the RAM 704 is JPEG compressed by the image decoding / encoding engine 712, and the generated JPEG image file is recorded in the internal storage unit 713. It is assumed that the internal storage unit 713 is designated as the storage location of the image file.
Then, file creation date / time information is generated based on the date / time information obtained from the calendar IC 711, and the file creation date / time information is written in the directory entry of the file together with the file name to generate an image file. The

After completion of the image file generation, the transfer operation of the image frame file of the DMA 716 is resumed, and the information processing apparatus 701 transitions to a shooting standby state.
After the image file recording is completed in the internal storage unit 713, when the user issues a transfer request command to the memory card 714 using the operation switch 708, the transfer request command from the user The MPU 702 is notified via the panel interface 710, and the transfer process starts.

Next, file transfer processing from the internal storage unit 713 to the memory card 714 as an external recording medium in the information processing apparatus according to the first embodiment will be described in detail with reference to FIG. .
Note that, here, unless otherwise specified, the operation is the same as that described in the best mode for carrying out the present invention, and thus a duplicate description is omitted.
In the first embodiment, a case where the format of the file name in the internal storage unit 713 of the mobile phone and the format of the file name in the memory card 714 have the same specifications will be described.

When the user issues a transfer request command so that the first file in the first directory existing in the internal storage unit 713 of the mobile phone is transferred to the second directory existing in the memory card 714 The first file is specified as the file to be transferred, and the second directory is specified as the directory to which the first file is to be transferred (S802).
Next, the name of the first file is set as a candidate name of the transfer destination file (S803). Note that the name candidate of the transfer destination file is a candidate for the name of the first file when it is assumed that the first file has been transferred into the second directory.
Then, it is determined whether or not there is still a file in the second directory that has not been compared with the duplicatable information of the first file (S804).

  As a result of step S804 (S805), if it is determined that there is still a file in which the duplicatable information of the first file is not compared with the duplicatable information in the second directory, One file to be compared is specified from among the files that are not compared with the duplicatable information of the first file (S806). The file to be compared here refers to a file in the second directory in which the duplicatable information of the first file is compared with the duplicatable information.

Then, duplication possible information comparison processing is performed for the comparison target file in the second directory (S807). Step S807 will be described in detail later with reference to FIG.
As a result of step S807 (S808), when it is determined that “the second file already exists”, the transfer prohibition unit prohibits the first file from being transferred into the second directory (S809), and the flow is as follows. The process ends (S812). That is, the first file is not transferred into the second directory.
Therefore, it is possible to prevent two or more files having the same duplicatable information in the second directory from existing, and to reduce the capacity of the memory card that is the transfer destination of the first file by the capacity of the first file, Can be saved.
On the other hand, if the result of step S807 (S808) is determined as “re-search request”, that is, the duplicatable information of the first file and the duplicatable information of the comparison target file in the second directory are not the same. If it is determined, the flow returns to step S804, and the process of comparing the first file and the file in the second directory starts.

In this way, steps S804 to S808 are repeated.
Then, the duplication possibility information of the first file and the duplication possibility information of all the files in the second directory are compared, and the duplication possibility information of the first file and the duplication possibility information are compared in the second directory. If it is determined that there is no file that has not been processed (S805), the first file is transferred into the second directory (S810, S811).
That is, if it is determined that there is no second file having the same duplicatable information as the first file in the second directory, the first file is transferred to the second directory.

Next, step S807 for performing duplication possible information comparison processing for the comparison target file in the second directory in the first embodiment will be described with reference to FIG.
First, when the flow of step 807 starts (S901), the transmission instruction unit transmits the extension of the first file and the extension of the comparison target file in the second directory to the duplicable small-capacity information comparison unit. (S902).
Then, the duplicable small-capacity information comparison unit compares the extension of the first file with the extension of the comparison target file in the second directory, and determines whether or not they are the same (S903). ).
As a result of step S903 (S904), when it is determined that they are not the same, the contents of the first file and the contents of the comparison target file in the second directory are regarded as not identical, and the file of step S911 Move on to the name comparison process.
That is, before the file contents are compared with each other, first, extensions that are small capacity information that can be duplicated and whose capacity is smaller than the file contents are compared with each other. If the extensions are not the same, the contents are not compared with each other, so that the time required for the comparison process can be shortened.

On the other hand, as a result of step S903 (S904), when it is determined that both are the same, the transmission instruction unit obtains the size information of the first file and the size information of the comparison target file in the second directory. It transmits to the duplicable small capacity information comparison part (S905).
Then, the duplicable small capacity information comparison unit compares the size information of the first file with the size information of the comparison target file in the second directory, and determines whether or not they are the same (S906). ).

  The size information here may be the actual size of the file, and the file management unit in the recording medium in which the first file exists is the same as the file management unit in the recording medium in which the second directory exists. In this case, the file size on the disk may be used. Since the size of the file on the disk is expressed in units in which the file is managed by the information processing apparatus, the size is larger than the actual size of the file. For example, if the management unit of the file by the information device is 4 kilobytes, the size of the file on the disk is 4 kilobytes even if the actual size of the file is 1 byte.

As a result of step S906 (S907), when it is determined that they are not the same, the contents of the first file and the contents of the comparison target file in the second directory are regarded as not identical, and the file of step S911 The name comparison process starts.
That is, before the file contents are compared with each other, first, the size information that is the duplicatable small capacity information having a smaller capacity than the file contents is compared. If the size information is not the same, the contents are not compared with each other, so that the time required for the comparison process can be shortened.

On the other hand, if the result of step S906 (S907) indicates that both are the same, the transmission instruction unit compares the contents of the first file with the contents of the comparison target file in the second directory. (S908).
Then, the content comparison unit compares the content of the first file with the content of the comparison target file in the second directory, and determines whether or not they are the same (S909).
As a result of step S909 (S910), when it is determined that both are the same, the result of step S807 is “second file existing”, and step S807 is ended (S914).

On the other hand, as a result of step S909 (S910), when it is determined that the two are not the same, the name comparison unit compares the name of the first file with the name of the comparison target file in the second directory, It is determined whether or not both are the same (S911).
As a result of step S911 (S912), when it is determined that they are not the same, the result of step S807 is “re-search request”, and step S807 ends (S915).
On the other hand, as a result of step S911 (S912), if it is determined that both are the same, that is, the comparison target file in the second directory is not the same as the content of the first file, and If the file has the same name as the name of the first file, the name candidate of the transfer destination file is changed to a name other than the names of all the files existing in the second directory (S913). The result of step S807 is “re-search request”, and step S807 ends (S915).

Next, step S913, which is a candidate name change process for the transfer destination file, will be described in detail with reference to FIGS.
FIG. 10 is a configuration diagram illustrating file names in the first embodiment.
The name of the file is composed of a file name consisting of 8 characters and an extension 1003 consisting of 3 characters following a period. The file name is composed of a fixed part 1001 composed of a four-character string common to all files, and a variable part 1002 in which a four-digit number string that is not duplicated for each file is represented by a four-character string. ing. The file name may be other than 8 characters, and the extension may be other than 3 characters. Further, the fixed portion 1001 may be other than 4 characters, and the variable portion 1002 may be other than 4 digits or may not be a number. The file name may be other than the above configuration.

Next, the name candidate change process (S913) of the scheduled transfer destination file of the information processing apparatus according to the first embodiment will be described in detail with reference to FIG.
Hereinafter, the case where the fixed part of the name candidate of the scheduled transfer destination file is the same as the fixed part of the file name in the second directory, and the variable part 1002 of the file name is composed of numbers will be described.

First, when the flow of step S913 is started (S1101), it is determined whether or not there is a file in the second directory that has not been compared with the variable part of the name candidate of the transfer destination file. (S1102).
As a result of the determination in step S1102 (S1103), if it is determined that there is still a file in which the variable part of the name candidate of the transfer destination file and the variable part are not compared in the second directory, the second directory One variable portion 1002 of the name comparison target file is acquired from among the files whose names are not compared (S1104).
Then, the size of the variable part of the name candidate of the transfer destination file is compared with the size of the variable part of the name comparison target file (S1105). It should be noted that the name comparison target file here is a second candidate in which the variable part of the name candidate of the transfer destination file and the variable part of the name in the transfer candidate file name candidate changing process (S913) are compared. A file in a directory.

As a result of the comparison in step S1105 (S1106), if the variable part of the name comparison target file is smaller than the variable part of the name candidate of the transfer destination file, the flow returns to step S1102, and the name candidate of the transfer destination file is determined. The comparison process between the variable part and the variable part of the file in the second directory is repeated.
On the other hand, if the result of the comparison in step S1105 (S1106) shows that the variable part of the name comparison target file is larger than or equal to the variable part of the name candidate of the transfer destination file, the variable part of the name candidate of the transfer destination file Then, a number added with 1 is substituted into the variable part of the name comparison target file (S1107). Then, the flow returns to step S1102, and the comparison process between the variable part of the name candidate of the transfer destination file and the variable part of the file in the second directory is repeated.
Then, the name candidates of the transfer destination file are compared with the names of all the files in the second directory, and when it is determined that there is no uncompared file in the second directory (S1103). ), The name candidate change process (S913) of the transfer destination file ends (S1107).

  By these processes, the variable part of the name candidate of the transfer destination file becomes a larger number than the variable part of the names of all the files in the second directory, and the names of two or more files in the second directory Can be avoided. In addition, you may avoid duplication of the name in a 2nd directory by processes other than the above.

Further, when the file duplication possibility information is composed of a plurality of clusters, the flow of the comparison process between the duplication possibility information of the first file and the duplication possibility information of the comparison target file in the second directory is shown in FIG. 12 may be used.
For example, when the content of the file is composed of a plurality of clusters, step S908, step S909, and step S910 in FIG. 9 may be replaced with the flow shown in FIG.

First, when the comparison process between duplicatable information of the first file and duplicatable information of the comparison target file in the second directory is started (S1201), duplication possible information of the comparison target file in the second directory is started. It is determined whether or not there is a cluster that is not compared with the cluster that configures the duplicatable information of the first file among the clusters that configure (S1202).
As a result of step S1202 (S1203), when it is determined that there is an uncompared cluster, the transmission instruction unit compares the duplicatable information for one uncompared cluster of the first file with the comparison in the second directory. The duplicatable information for one cluster of uncompared target files is transmitted to the duplicatable information comparing unit (S1204).
Then, the duplicatable information comparison unit compares the duplicatable information for one cluster of the first file with the duplicatable information for one cluster of the file in the second directory, and whether or not both are the same. Is determined (S1205).

As a result of step S1205 (S1206), when it is determined that they are not the same, it is determined that the duplicatable information of the first file and the duplicatable information of the comparison target file in the second directory are not the same, The comparison process between the duplication possibility information of the first file and the duplication possibility information of the comparison target file in the second directory is finished (S1207). That is, in FIG. 9, when it is determined that the duplicatable information is not the same as a result of step S909 (S910), the flow proceeds to the process of step S911.
On the other hand, as a result of step S1205 (S1206), when it is determined that both are the same, the flow returns to step S1202, and the duplication possible information for the next one cluster of the first file and the second directory Comparison processing with duplicatable information for the next one cluster of the comparison target file is started.
In this way, steps S1202 to S1206 are repeated, and the duplication possibility information of the first file is compared with the duplication possibility information of the comparison target file in the second directory.
Then, all the clusters constituting the duplicatable information of the first file are compared with all the clusters constituting the duplicatable information of the comparison target file in the second directory, and there is no uncompared cluster. If it is determined (S1203), it is determined that the duplication possibility information of the first file and the duplication possibility information of the comparison target file in the second directory are the same, and the duplication possibility information of the first file is the same. The comparison process with the duplicatable information of the comparison target file in the second directory ends (S1208). That is, in FIG. 9, when the result of step S909 (S910) determines that the duplicatable information is the same, the flow moves to the process of step S914.

  As described above, when the duplicatable information comparison unit compares duplicatable information composed of a plurality of clusters, the duplicatable information for one cluster in the first file and the comparison target file in the second directory When it is determined that the duplicatable information for one cluster is not the same, it is determined that the duplicatable information in the first file and the duplicatable information in the comparison target file in the second directory are not the same. The comparison process between the duplicatable information of the first file and the duplicatable information of the comparison target file in the second directory is completed. Therefore, in such a case, it is not necessary to compare all the clusters constituting the duplicatable information of the first file with all the clusters constituting the duplicatable information of the comparison target file in the second directory. The time required for the comparison process can be shortened.

In step S608, whether or not to prohibit the transfer of the first file into the second directory may be in accordance with an external input.
For example, when the transfer prohibition unit attempts to prohibit the transfer of the first file into the second directory, the display unit 1301 formed of a liquid crystal display or the like as shown in FIG. A prompt appears asking the user whether to prohibit the file from being transferred into the second directory. The user can select whether or not to prohibit the transfer of the first file into the second directory by operating the button of the operation unit 1302.
In addition, if it is selectable whether transfer is prohibited, it will not restrict to this, For example, it is prohibited to transfer a 1st file in a 2nd directory by an audio | voice. You may ask the user whether or not.
Accordingly, when the user wants to transfer the first file into the second directory even if the duplication possibility information of the first file and the duplication possibility information of the second file in the second directory are the same. The first file is transferred into the second directory.

Here, a case where a transfer request command is issued so that the first file in the first directory in the internal storage unit 713 is actually transferred into the second directory of the memory card will be described. .
Note that the name of the first file is P0000001. The extension of the first file is JPEG, the size of the first file is 10 kilobytes, and the content of the first file is an image composed of red color information.
Further, one second file exists in the second directory. The name of the second file is P0000002. It is assumed that the extension of the second file is JPEG, the size of the second file is 10 kilobytes, and the content of the second file is an image composed of red color information.

When the transfer request command is issued so that the first file is transferred into the second directory by the user, the flow shown in FIG. 8 is started (S801), and the first file is set as the file to be transferred. The second directory is specified as the directory to which the first file is scheduled to be transferred (S802).
Next, as a name candidate for the transfer destination file, P0000001. JPG is set (S803).
In step S804, it is determined that there is still a file that has not been compared with the duplicatable information of the first file in the second directory (S805), and the second file is the file to be compared. (S806).

Further, the process in the next step S807 will be described with reference to FIG.
The transmission instructing unit transmits the information “JPEG” that is the extension of the first file and the information “JPEG” that is the extension of the second file to the duplicable small-capacity information comparing unit (S902).
Then, the duplicable small-capacity information comparison unit compares the information “JEPG” that is the extension of the first file with the information “JEPG” that is the extension of the second file, and determines whether or not they are the same. Determination is made (S903). In step 903, since the information represented by JPEG in binary is subtracted from the information represented by JPEG in binary, the output value is 0 and both are determined to be the same. (S904).
Next, the transmission instructing unit transmits the information of 10 kilobytes that is the size information of the first file and the information of 10 kilobytes that is the size information of the second file to the duplicable small capacity information comparing unit (S905). .
Then, the duplicable small capacity information comparison unit compares the information of 10 kilobytes which is the size information of the first file with the information of 10 kilobytes which is the size information of the second file, and whether or not they are the same. Is determined (S906). In step S906, since 10 kilobytes of information expressed in binary is subtracted from 10 kilobytes of information expressed in binary, the output value is 0 and both are the same. Is determined (S907).

Since the content of the file is composed of a plurality of clusters, the operation of the content comparison process in the next step S908, step S909, and step S910 is replaced with the operation shown in FIG.
First, in step S1202, it is determined that there is a cluster that is not compared with the cluster that configures the content of the first file among the clusters that configure the content of the second file (S1203).
Then, the transmission instructing unit transmits the red color information for one cluster constituting the content of the first file and the red color information for one cluster constituting the content of the second file to the content comparison unit. (S1204).
Then, the content comparison unit compares the red color information for one cluster constituting the contents of the first file with the red color information for one cluster constituting the contents of the second file. It is determined whether or not (S1205).
Note that in step S1205, the red color information for one cluster expressed in binary is subtracted from the red color information for one cluster expressed in binary, so the output value is It becomes 0 and it is determined that both are the same (S1206).

The flow then returns to step S1202, and the red color information for the next cluster constituting the contents of the first file and the red color information for the next cluster constituting the contents of the second file. The comparison process begins.
As described above, steps S1202 to S1206 are repeated, and red color information of all clusters constituting the contents of the first file and red color information of all clusters constituting the contents of the second file Are compared.
In step S1202, it is determined that there is no uncompared cluster, and the result of the comparison process between the contents of the first file and the contents of the second file is “same”, and the contents of the first file and the second file are compared. The comparison process with the contents of the file ends (S1208).

That is, in the content comparison process of FIG. 9, it is determined that the content of the first file and the content of the second file are the same (S910), and the result of step S807 of FIG. Thus, the transfer prohibition unit prohibits the first file from being transferred into the second directory (S809), and the flow ends (S812). That is, the first file is not transferred into the second directory.
Therefore, it is possible to prevent the presence of two or more files having the same contents in the second directory, and the capacity of the memory card to which the first file is to be transferred is set to 10 kilobytes which is the capacity of the first file. You can save minutes.

In the first embodiment, the duplicatable small-capacity information of files compared by the duplicatable small-capacity information comparison unit is extension and size information, but file type information, application information, creation time information, creation date information Other duplicatable small-capacity information such as update date / time information, access date / time information, or creator information may be used.
Further, the duplicable small-capacity information comparison unit may sequentially compare a plurality of duplicatable small-capacity information, or may compare a plurality of duplicatable small-capacity information at the same time.
Note that a part of the contents of the first file may be compared with a part of the contents of the file in the second directory by the contents comparison unit. In this case, the time required for the comparison process can be shortened as compared with the case where all the contents of the first file are compared with all the contents of the files in the second directory.
Further, it may be determined whether or not the duplication possibility information of the first file and the duplication possibility information of the file in the second directory are the same by a method other than the first embodiment.

In the first embodiment, the first directory exists in the information processing apparatus and the second directory exists in the external recording medium. However, the first directory exists in the external recording medium. The second directory may exist in the information processing apparatus.
Further, the first directory and the second directory may exist in the same recording medium. For example, both the first directory and the second directory may exist in the information processing apparatus, and both the first directory and the second directory may exist in the external recording medium. Absent.
In any case, it is possible to prevent the presence of two or more files having the same duplicatable information in the second directory, and to save the capacity of the recording medium of the file transfer scheduled destination by the capacity of the first file. can do.
In particular, when the transfer destination recording medium is an external recording medium such as a memory card, the capacity of the external recording medium such as a memory card is small. The effect in the present invention of saving is conspicuous.

The file system is not limited to the FAT file system, and may be another file system such as NTFS or HPFS.
The first file is not limited to an image file, and may be another type of file such as a moving image file, an audio file, or a character file. In particular, when the first file is an image file, a moving image file, or an audio file, since these types of files have a large capacity, the capacity of the recording medium to which the file transfer is scheduled is reduced by the capacity of the first file, The effect of the present invention that it can be saved stands out.
In the first embodiment, the information processing apparatus is a mobile phone, but may be another information processing apparatus such as a personal computer, a PDA, a digital camera, a digital television, or a digital home appliance.
In the first embodiment, the external recording medium is a memory card. However, the external recording medium may be another external recording medium such as a CD, MD, DVD, HDDVD, Blu-ray disc, or floppy disk.

(Example 2)
FIG. 14 is a flowchart showing the operation of the information processing apparatus according to the second embodiment of the present invention.
An information processing apparatus according to the second embodiment of the present invention will be described with reference to FIG. Unless otherwise specified, the best mode for carrying out the present invention is the same as the best mode for implementing the present invention.
The information processing apparatus according to the second embodiment does not include the transfer prohibition unit, but includes an overwriting unit that overwrites the second file with the first file. That is, when it is determined that the duplicatable information of the first file and the duplicatable information of the second file in the second directory are the same, the overwriting unit uses the first file to copy the second file. Overwrite

Next, the operation of the information processing apparatus according to the second embodiment will be described with reference to FIG. Unless otherwise described, the best mode for carrying out the present invention is the same as the operation described with reference to FIG.
Steps S1401 to S1407 are the same as those of the information processing apparatus according to the best embodiment, and thus are omitted.
If it is determined that the duplicatable information of the first file and the duplicatable information of the second file in the second directory are the same, the second file is deleted (S1408). Then, various information of the first file is read (S1409), and various information of the first file is written in the second directory (S1410).
Step S1408, step S1409, and step S1410 are operations of the overwriting unit. That is, overwriting the second file with the first file means erasing the second file and transferring the first file into the second directory. Note that either the deletion of the second file or the transfer of the first file into the second directory may be performed first.
Therefore, when the duplication possibility information of the first file and the duplication possibility information of the second file in the second directory are the same, the second file is overwritten by the first file, so that the second file is overwritten. In this directory, it is possible to prevent two or more files having the same duplicatable information from existing, and to save the capacity of the recording medium to which the file transfer is scheduled as much as the capacity of the first file.

In step S1408, whether or not the second file is deleted may follow the input from the outside. That is, whether or not the second file is deleted when it is determined that the duplicatable information of the first file and the duplicatable information of the second file in the second directory are the same, Can be selected according to user's option.
Therefore, even if the duplicatable information of the first file and the duplicatable information of the second file in the second directory are the same, the user does not want to overwrite the second file with the first file. The second file is not overwritten by the first file.

(Example 3)
FIG. 15 is a structural diagram of the information processing apparatus 1501 according to the third embodiment. Unless otherwise specified, the best mode for carrying out the present invention is the same as the best mode for implementing the present invention.
In the information processing apparatus 1501 according to the third embodiment, the directory A 1507 exists in the internal storage unit 1502 and the first file 1508 exists in the directory A 1507. Further, a directory B 1509 and a directory C 1514 exist in the removable external recording medium 1505, a file 1510 exists in the directory B 1509, and a file 1515 exists in the directory C 1514.
In the third embodiment, the internal storage unit 1502 of the information processing apparatus 1501 is specified as the first storage area of the transfer source, and the external recording medium 1505 is specified as the second storage area of the transfer destination.

Consider a case where the user issues a transfer request command to transfer the first file 1508 to the directory B 1509 existing in the external recording medium 1505.
The transmission instructing unit 1511 transmits not only the duplicatable information of the first file 1508 and the duplicatable information of the file 1510 in the directory B 1509 but also the duplicatable information of the file 1515 in the directory C1514 to the duplicatable information comparing unit 1512. . Then, the duplication possibility information comparison unit 1512 not only compares the duplication possibility information of the first file 1508 and the duplication possibility information of the file 1510 in the directory B 1509, but also compares the duplication possibility information of the first file 1508 and the directory C 1514. Is compared with the duplicatable information of the file 1515.
When it is determined that the duplicatable information in the first file 1508 and the duplicatable information in the file 1515 in the directory C1514 are the same, the transfer prohibition unit 1513 puts the first file 1508 in the directory B1509. It is prohibited to be transferred. That is, when the duplicatable information of the first file 1508 and the duplicatable information of the file 1515 in the external recording medium 1505 are compared and it is determined that they are the same, the first file 1508 is recorded in the external recording medium. It is not transferred into the medium 1505.

In short, when it is determined that the duplication possibility information of the file 1515 and the duplication possibility information of the first file 1508 in the directory C1514 different from the transfer-destination directory B1509 are the same, the first file 1508 is an external file. It is not transferred to the recording medium 1505.
Accordingly, the existence of two or more files having the same duplicatable information on the external recording medium 1505 as the second recording medium is prevented, and the capacity of the second recording medium is saved by the capacity of the first file 1508. be able to.

Note that the information processing apparatus 1501 may include an overwrite unit (not shown) instead of not including the transfer prohibition unit 1513. That is, when it is determined that the duplicatable information in the first file 1508 and the duplicatable information in the file 1515 in the directory C1514 are the same, the overwriting unit replaces the second file in the directory C with the first file. The file 1508 may be overwritten.
Accordingly, the existence of two or more files having the same duplicatable information on the external recording medium 1505 as the second recording medium is prevented, and the capacity of the second recording medium is saved by the capacity of the first file 1508. be able to.

  As described above, the data control method and the information processing apparatus according to the present invention can save the capacity of the recording medium to be transferred to the file by the capacity of the first file. It can be used for computers, supercomputers, PDAs, digital cameras, digital televisions, digital home appliances, digital video cameras, in-vehicle computers, portable terminals, and the like.

1 is a block diagram of an information processing apparatus in the best mode for carrying out the present invention. Structure diagram of internal storage in FAT file system The flowchart which shows operation | movement of the information processing apparatus in the best form for implementing this invention. The flowchart which shows the process of the duplication possible information comparison part The block diagram of the information processing apparatus in the modification of the best form for implementing this invention The flowchart which shows operation | movement with the information processing apparatus in the modification of the best form for implementing this invention 1 is a block diagram of an information processing apparatus according to a first embodiment of the present invention. The flowchart which shows operation | movement of the information processing apparatus in Example 1 of this invention. The flowchart which shows the operation | movement by step S807 in Example 1 of this invention. The block diagram which shows the name of the file in Example 1 of this invention The flowchart which shows operation | movement of the file name conversion process in Example 1 of this invention. Flow chart showing comparison processing when duplicatable information is composed of multiple clusters Overview of the information processing apparatus in Embodiment 1 of the present invention The flowchart which shows operation | movement of the information processing apparatus in Example 2 of this invention. Block diagram of an information processing apparatus in Embodiment 3 of the present invention

Explanation of symbols

101 Information processing apparatus 102 Internal storage unit 103 MPU
104 DMA
DESCRIPTION OF SYMBOLS 105 External recording medium 106 System bus 107 1st directory 108 1st file 109 2nd directory 110 File 111 Transmission instruction part 112 Duplicatable information comparison part 113 Transfer prohibition part 201 Internal storage part 202 Data area 203 Directory entry area 204 FAT area

Claims (31)

A transmission instructing unit for transmitting duplicatable information of the first file in the first storage area and duplicatable information of the second file in the second storage area;
The duplication possibility information of the first file transmitted by the transmission instruction unit and the duplication possibility information of the second file transmitted by the transmission instruction unit are compared, and it is determined whether or not they are the same. A duplicatable information comparison unit,
When the duplicatable information comparison unit determines that the duplicatable information of the first file and the duplicatable information of the second file are the same, the first file is stored in the second storage area. A transfer prohibition unit that prohibits transfer to within,
An information processing apparatus. A transmission instructing unit for transmitting duplicatable information of the first file in the first storage area and duplicatable information of the second file in the second storage area;
The duplication possibility information of the first file transmitted by the transmission instruction unit and the duplication possibility information of the second file transmitted by the transmission instruction unit are compared, and it is determined whether or not they are the same. A duplicatable information comparison unit,
When the duplicatable information comparison unit determines that the duplicatable information of the first file and the duplicatable information of the second file are the same, the second file is replaced by the first file. An overwrite part to be overwritten;
An information processing apparatus.   The information processing apparatus according to claim 1, wherein the duplicatable information is content.   The information processing apparatus according to claim 3, wherein the content is information recorded in a data area in a recording medium.   The information processing apparatus according to claim 1, wherein the duplicatable information is duplicatable small-capacity information having a capacity smaller than the capacity of the content in file information. Transmitting the duplicatable small capacity information of the first file in the first storage area and the duplicatable small capacity information of the second file in the second storage area, and the contents of the first file and the A transmission instruction unit for transmitting the contents of the second file;
The duplicatable small-capacity information of the first file transmitted by the transmission instructing unit is compared with the duplicatable small-capacity information of the second file transmitted by the transmission instructing unit. A duplicatable small-capacity information comparison unit for determining whether or not,
When the duplicatable small-capacity information comparison unit determines that the duplicatable small-capacity information of the first file and the duplicatable small-capacity information of the second file are the same, the transmission instruction unit transmits A content comparison unit that compares the content of the first file that has been transmitted with the content of the second file that has been transmitted by the transmission instruction unit, and determines whether or not both are the same;
When the contents comparing unit determines that the contents of the first file and the contents of the second file are the same, the first file is transferred into the second storage area. And a transfer prohibition unit that prohibits
An information processing apparatus in which a capacity of the duplicatable small capacity information is smaller than a capacity of the content. Transmitting the duplicatable small capacity information of the first file in the first storage area and the duplicatable small capacity information of the second file in the second storage area, and the contents of the first file and the A transmission instruction unit for transmitting the contents of the second file;
The duplicatable small-capacity information of the first file transmitted by the transmission instructing unit is compared with the duplicatable small-capacity information of the second file transmitted by the transmission instructing unit. A duplicatable small-capacity information comparison unit for determining whether or not,
When the duplicatable small-capacity information comparison unit determines that the duplicatable small-capacity information of the first file and the duplicatable small-capacity information of the second file are the same, the transmission instruction unit transmits A content comparison unit that compares the content of the first file that has been transmitted with the content of the second file that has been transmitted by the transmission instruction unit, and determines whether or not both are the same;
When the content comparison unit determines that the content of the first file and the content of the second file are the same, an overwrite unit that overwrites the second file with the first file;
An information processing apparatus in which a capacity of the duplicatable small capacity information is smaller than a capacity of the content.   7. The information processing apparatus according to claim 1, wherein whether or not to prohibit the transfer of the first file into the second storage area is in accordance with an external input.   The information processing apparatus according to claim 2 or 7, wherein whether or not the second file is overwritten by the first file is in accordance with an input from the outside. A name comparison unit that compares the name of the first file with the name of the file in the second storage area;
If the file in the second storage area is a file that is not the same as the content of the first file and has the same name as the name of the first file, the first file is: The information processing apparatus according to claim 1, wherein the information processing apparatus is changed to a name other than the names of all files in the second directory and transferred to the second directory.   The said duplicatable small capacity information is at least one of size information, an extension, creation time information, creation date information, update date information, and access date information, according to any one of claims 5 to 10. Information processing device.   The information processing apparatus according to claim 1, wherein the storage area is a directory storage area.   The information processing apparatus according to claim 1, wherein the storage area is a storage area of a recording medium.   The information processing apparatus according to claim 12, wherein the first storage area and the second storage area exist in different recording media.   The information processing apparatus according to claim 14, wherein a capacity of the recording medium in which the second storage area exists is smaller than a capacity of the recording medium in which the first storage area exists.   The information processing apparatus according to claim 14, wherein the first storage area exists in an internal storage unit of the information processing apparatus, and the second storage area exists in an external recording medium.   The information processing apparatus according to any one of claims 1 to 16, wherein the file is any one of an image file, a moving image file, and an audio file. Transmitting the duplicatable information of the first file in the first storage area and the duplicatable information of the second file in the second storage area to the duplicatable information comparison unit;
The duplication possibility comparison unit compares duplication possibility information of the first file and duplication possibility information of the second file, and determines whether or not both are the same;
When it is determined that the duplicatable information of the first file and the duplicatable information of the second file are the same, the first file is transferred to the second storage area. A data control method including a prohibiting step. Transmitting the duplicatable information of the first file in the first storage area and the duplicatable information of the second file in the second storage area to the duplicatable information comparison unit;
The duplication possibility comparison unit compares duplication possibility information of the first file and duplication possibility information of the second file, and determines whether or not both are the same;
When it is determined that the duplicatable information of the first file and the duplicatable information of the second file are the same, the second file is overwritten by the first file. Data control method.   The data control method according to claim 18 or 19, wherein the duplicatable information is content.   The data control method according to claim 20, wherein the content is information recorded in a data area of a recording medium.   20. The data control method according to claim 18 or 19, wherein the duplicatable information is duplicatable small capacity information having a capacity smaller than the capacity of the contents among file information. Transmitting the duplicatable small capacity information of the first file in the first storage area and the duplicatable small capacity information of the second file in the second storage area to the duplicatable small capacity information comparing unit;
The duplicatable small capacity information comparison unit compares the duplicatable small capacity information of the first file with the duplicatable small capacity information of the second file, and determines whether or not they are the same. When,
When it is determined that the duplicatable small capacity information of the first file and the duplicatable small capacity information of the second file are the same, the contents of the first file and the contents of the second file Sending to the content comparison unit;
The content comparison unit compares the content of the first file with the content of the second file and determines whether or not both are the same;
Prohibiting the transfer of the first file into the second storage area when it is determined that the content of the first file and the content of the second file are the same; Including
A data control method in which a capacity of the duplicatable small capacity information is smaller than a capacity of the contents. Transmitting the duplicatable small capacity information of the first file in the first storage area and the duplicatable small capacity information of the second file in the second storage area to the duplicatable small capacity information comparing unit;
The duplicatable small capacity information comparison unit compares the duplicatable small capacity information of the first file with the duplicatable small capacity information of the second file, and determines whether or not they are the same. When,
When it is determined that the duplicatable small capacity information of the first file and the duplicatable small capacity information of the second file are the same, the contents of the first file and the contents of the second file Sending to the content comparison unit;
The content comparison unit compares the content of the first file with the content of the second file and determines whether or not both are the same;
When it is determined that the content of the first file and the content of the second file are the same, the second file is overwritten by the first file;
A data control method in which a capacity of the duplicatable small capacity information is smaller than a capacity of the contents.   The data control method according to claim 18 or 23, wherein whether or not to prohibit the transfer of the first file into the second storage area is in accordance with an input from the outside.   The data control method according to claim 19 or 24, wherein whether or not the second file is overwritten by the first file is in accordance with an external input.   27. The duplicateable small-capacity information is at least one of size information, extension, creation time information, creation date information, update date information, and access date information, according to any one of claims 22 to 26. Data control method.   The data control method according to any one of claims 18 to 27, wherein the storage area is a directory storage area.   28. The data control method according to claim 18, wherein the storage area is a storage area of a recording medium. Computer
A transmission instructing unit for transmitting duplicatable information of the first file in the first storage area and duplicatable information of the second file in the second storage area;
The duplication possibility information of the first file transmitted by the transmission instruction unit and the duplication possibility information of the second file transmitted by the transmission instruction unit are compared, and it is determined whether or not they are the same. A duplicatable information comparison unit,
When the duplicatable information comparison unit determines that the duplicatable information of the first file and the duplicatable information of the second file are the same, the first file is stored in the second storage area. A program for functioning as a transfer prohibition unit that prohibits transfer of data into a file. Computer
A transmission instructing unit for transmitting duplicatable information of the first file in the first storage area and duplicatable information of the second file in the second storage area;
The duplication possibility information of the first file transmitted by the transmission instruction unit and the duplication possibility information of the second file transmitted by the transmission instruction unit are compared, and it is determined whether or not they are the same. A duplicatable information comparison unit,
When it is determined that the duplicatable information of the first file and the duplicatable information of the second file in the second storage area are the same, the second file is changed by the first file. A program for functioning as an overwriting section to be overwritten.

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