JP2005050192A - Information recording system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restore the recording ability of a flash memory recording media in an information recording device under the control of an information processor while automatically and safely backing up files recorded in the flash memory recording media via a communication line. <P>SOLUTION: This information recording system comprises an information processor 101 and an information recording device 105 connected to each other via a communication line 106. The information processor 101 backs up via the communication line the files recorded in the flash memory recording media in the information recording device 105, and causes information showing file backups to be recorded in the flash memory recording media in the information recording device 105 via the communication line 106. Also, the information recording device 105 reads the backup information recorded in the flash memory recording media by the information processor 106, and deletes the files depending on the backup information read. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information recording system including an information processing apparatus and an information recording apparatus connected via a communication line.

  Generally, users use digital cameras, digital video cameras, etc., compact flash (registered trademark), smart media, multimedia cards, memory sticks, flash memory cards using flash memory such as SD memory cards, and small hard disk drives for mobile applications. Image files shot and recorded on a disk recording medium such as (HDD) do not remain as they are, but a large-capacity and inexpensive recording medium such as a personal computer HDD, CD-R / RW, DVD-RAM, DVD-R / RW The recording capacity is increased by deleting the unnecessary files in the flash memory card and the disk recording medium, and the flash memory card and the disk recording medium are used again for photographing. Conventionally, as a backup method of files in the flash memory card or the disk recording medium, a digital camera and a personal computer are connected by an interface such as a USB (Universal Serial Bus), and the flash memory card or the disk recording medium in the digital camera is connected. There is a method of importing files to a computer. For example, using functions specified by USB interface standards such as mass storage class, a PC recognizes and operates a digital camera as if it were a removable medium, and a vendor-specific command is used between the PC and the digital camera. (For example, refer to Patent Document 1).

  In addition, in a recording apparatus such as a digital camera equipped with a flash memory card that has become widespread as a recording medium recently, a decrease in recording speed due to fragmentation caused by frequent creation and deletion of files is serious. It is a problem.

Unlike a disk recording medium such as a floppy (registered trademark) disk and a hard disk drive, a flash memory card does not have a mechanical overhead such as seeking a recording head or waiting for rotation. However, the recording area of the flash memory has a characteristic that once data has been written, data cannot be written again unless ERASE is performed in units of blocks, and this ERASE generates overhead. The above characteristics of the flash memory are that writing from 1 to 0 in the recording area can be performed in bit units, but writing from 0 to 1 can be performed only in blocks. This block-unit writing from 0 to 1 is called ERASE, and a unit block that can perform ERASE is called an ERASE block. This ERASE is very slow compared to writing from 1 to 0. In addition, normally, when a file in a flash memory card is erased by an information processing device such as a personal computer, the management information of that file is erased, but the recording area allocated to that file is only released. In most cases, actual data is not erased. Therefore, ERASE is executed when the released area is used again. For this reason, there is a problem of a decrease in recording speed due to fragmentation as described above. Needless to say, this problem can be solved by performing ERASE processing on the unused area of the recording area in advance.
JP 2001-069296 A (page 3-8, FIG. 5)

  However, the above conventional technique has the following problems in restoring the recording capability of the flash memory card while safely backing up the image file in the flash memory card in the digital camera.

  Using a USB mass storage function from a personal computer, it is possible to delete unnecessary image files in the flash memory card while backing up files in the flash memory card in the digital camera. However, in order to erase the unused area of the flash memory card, the digital camera must be operated directly, which makes the user feel bothersome. In addition, the connection between the personal computer and the digital camera may be suddenly cut off due to factors such as the USB cable being disconnected from the terminal or the personal computer being turned off during file deletion. If this happens, the data in the flash memory card in the digital camera will be corrupted, and the flash memory card cannot be used normally as it is thereafter. Also, as shown in Patent Document 1, in order to perform an operation led by a digital camera, it is necessary to add a function for receiving a vendor-unique command to a USB driver of a personal computer.

  Therefore, the present invention provides a flash memory card that automatically backs up image files in a flash memory card in a digital camera automatically under the initiative of the personal computer without adding a special function to the USB driver of the personal computer. It is an object of the present invention to provide an information recording system that restores the recording ability of a computer.

  In order to solve the above-described conventional problems, an information recording system of the present invention comprises an information processing apparatus and an information recording apparatus connected via a communication line, and the information recording apparatus is connected to the information recording apparatus via a communication line. Thus, the information recorded on the recording medium of the information recording apparatus is read, and predetermined processing is performed according to the read information.

  In addition, the information recording system of the present invention connects an information processing device and an information recording device via a communication line, and the information processing device stores a file in a recording medium in the information recording device via a communication line. Backing up and recording information indicating the backup status of the file on a recording medium in the information recording device via the communication line, the information recording device reads information indicating the backup status recorded on the recording medium by the information processing device, A file in the recording medium is erased in accordance with the read information indicating the backup status.

  Further, the information indicating the backup status is characterized in that the corresponding file is information indicating whether the file is not backed up, being backed up, or backed up.

  Still further, the information recording apparatus is characterized in that information indicating the erasure status of the file is written on the recording medium.

  Still further, the information indicating the file erasure status is information indicating that the corresponding file is in an unerased state, an erasing state, or an erased state.

  Still further, the recording medium of the information recording apparatus is a flash memory recording medium.

  Furthermore, the information recording apparatus has a function of ERASE an unused area in the flash memory recording medium.

  Furthermore, the information recording apparatus ERASEs the ERASE block that has become unused when the recording area in the flash memory recording medium becomes unused in units of ERASE blocks due to the file being erased. It is characterized by.

  Furthermore, when a plurality of files constituting one content are recorded on the recording medium, the information indicating the backup status is deleted when all the files constituting the content have been backed up. It is characterized by.

  Further, the information recording system is characterized in that information indicating a backup status and / or information indicating a file erasing status is recorded in a predetermined management file in a recording medium in a unified manner.

  Still further, the information recording apparatus is characterized in that a predetermined management file is deleted when information indicating the backup status has not been recorded and updated for a predetermined time.

  Furthermore, the communication line is characterized by being a USB (Universal Serial Bus).

  As described above, according to the information recording system of the present invention, a special function is not added to a general-purpose interface such as a USB of an information processing apparatus, and the user does not feel troublesome under the initiative of the information processing apparatus. The recording capability of the memory recording medium can be restored by automatically and safely erasing the backed up data in the information recording apparatus and erasing the unused area of the memory recording medium.

Hereinafter, an embodiment of an information processing system of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram of a digital video camera system according to a first embodiment of the present invention. In FIG. 1, a personal computer 101 is connected to a digital video camera 105 using a removable flash memory card as a recording medium and a USB cable 106. Further, the personal computer 101 is connected with a keyboard 103 and a mouse 104 which are user operation input means, and a display 102 for displaying an operation result and an operation status of the personal computer 101.

  FIG. 2 is a diagram showing the configuration of software and hardware of a personal computer in a digital video camera system in which the present invention can be implemented. In FIG. 2, 210 is hardware, 220 is lower layer software such as a device driver, operating system (OS), middleware, etc. operating on the hardware 210, and 230 is upper layer software operating on the lower layer software 220. . Of course, blocks included in the hardware 210 and the lower layer software 220 are included as structural requirements, but blocks that are not directly necessary for describing the embodiment of the present invention are not shown. Examples of such blocks (not shown) include a CPU and memory as hardware, and a memory management system as lower layer software. In FIG. 2, reference numeral 221 denotes an output device management system, which has a function that allows upper layer software to draw an output image on the display 102 without directly controlling the hardware. Reference numeral 212 denotes a display unit interface for the output device management system 221 to draw on the display 102. An input device management system 222 has a function that allows upper layer software to receive user input without directly controlling the hardware. Reference numeral 213 denotes an operation input unit interface for the input device management system 222 to receive input from the keyboard 103 and the mouse 104. A file system 223 has a function that allows upper layer software to handle data of a recording device as a file. Reference numeral 211 denotes a hard disk drive (HDD) for storing files and data, and 224 denotes a disk driver, which has a function that allows the file system 223 to input / output data in the HDD without directly controlling the hardware. Reference numeral 214 denotes a disk IO interface for the disk driver 224 to read and write the HDD 211. A USB driver 225 includes a general function for realizing a USB host system as a host when using a USB device. The file system does not directly control hardware, and the digital video is transmitted via the USB cable 106. There is a function of reading data in the flash memory card of the camera 105 or writing data into the flash memory card. Reference numeral 215 denotes a USB interface for the USB driver 225 to exchange image data and the like with the digital video camera 105 via the USB cable 106. A host application 231 manages and stores image data and can exchange image data and the like with the digital video camera 105 connected to the USB interface 215 through the USB driver 225.

  FIG. 3 is a diagram showing the software and hardware configuration of a digital video camera in a digital video camera system in which the present invention can be implemented. In FIG. 3, 310 is hardware, 320 is lower layer software such as a device driver, operating system (OS), middleware and the like that operates on the hardware 310, and 330 is upper layer software that operates on the lower layer software 320. . Of course, blocks included in the hardware 310 and the lower layer software 320 are included as structural requirements, but blocks that are not directly necessary for explaining the embodiment of the present invention are not shown. Examples of such blocks (not shown) include a CPU, memory, and camera unit as hardware, and a memory management system unit and a camera control unit as lower layer software. In FIG. 3, reference numeral 321 denotes an operation unit management system having a function that allows upper layer software to receive user input without directly controlling the hardware. Reference numeral 312 denotes an operation input unit for the operation unit management system 321 to receive an operation input from the user. A file system 322 has a function that allows upper layer software to handle recording device data as a file. Reference numeral 311 denotes a detachable flash memory card that stores image data and the like that have been photographed and quantum-compressed by a camera unit (not shown). A card driver 323 has a function that allows the file system 223 of the personal computer 101 via the file system 322 and the USB cable 106 to read / write and delete files in the flash memory card 311 without directly controlling the hardware. is there. Further, the card driver 323 has a function of ERASE the recording area of the flash memory card 311 in units of blocks. Reference numeral 313 denotes a card IO interface for the card driver 323 to read / write and ERASE the flash memory card 311. A USB driver 324 has a function of reading data from or writing data to the flash memory card 311 via the USB cable 106 without the file system 223 of the personal computer 101 directly controlling hardware. . Reference numeral 314 denotes a USB interface for the USB driver 324 to exchange image data and the like with the personal computer 101 via the USB cable 106. Reference numeral 331 denotes a digital video camera application that manages image files and the like in the flash memory card 311. The personal computer 101 can delete files that have been backed up.

  In this system, the personal computer 101 host application 231 reads an image file from the flash memory card 311 of the digital video camera 105 via the USB cable 106 and backs up the read image data on the hard disk 211 of the personal computer 101. Further, the digital video camera application 331 provides a function of deleting a backed up file in the flash memory card 311 and ERASE an unused area of the flash memory card 311.

  First, a first embodiment for managing image files according to the present invention will be described. First, a method for managing the backup status of each image file in this embodiment will be described. In the first embodiment, each image file is provided with a field for storing information indicating the status of whether the file itself has been backed up to the personal computer 101 and a field for managing the deletion of the file. FIG. 4 shows the internal structure of the file in this embodiment. As shown in FIG. 4, the image file is roughly divided into auxiliary data 401 and image data 404, and the auxiliary data 401 includes backup status information 402 and file deletion information 403. The accompanying data includes information such as the shooting date and time, the video size, and the compression method, but is not explicitly shown in the figure because it is not directly related to the present embodiment. The backup status information 402 is set to 00b when the file is backed up on a personal computer, 01b when the file is being backed up, 11b when the backup is desired and not backed up, and 10b when the backup is not desired. Is done. This backup status information 402 is normally recorded in a state 10b where backup is not desired, and backup is executed by the host application 231 by recording it in 11b by a user operation. In the file deletion information 403, 11b is set when the file can be deleted, and 10b is set when deletion is prohibited. This file erasure status information is recorded in a state 10b in which erasure is prohibited when a management file is generated, and is erased by the host application 231 by being recorded in 11b by a user operation.

  Next, an image file backup method of the personal computer 101 in this embodiment will be described.

  First, image file backup status information 402 and file deletion information 403 recorded in advance on the flash memory card 311 of the digital video camera 105 are set via the operation input unit 312 of the digital video camera 105. Then, the digital video camera 105 is connected to the personal computer 101 with the USB cable 106, and the power is turned on in the backup mode. The personal computer 101 also activates the host application 231. FIG. 5 shows the flow of processing after the host application 231 is started. First, in step 1, backup status information of all files in the flash memory is examined. For example, if the file / directory structure is as shown in FIG. 6, a backup list as shown in FIG. 7 is created. As shown in FIG. 7, the backup list has the path and file name of each file, and backup status information. Next, in step 2, a file having backup status information 11b is searched from the backup list. That is, it is determined whether there is a file that needs to be backed up in the flash memory card 311. If there is no file having the backup status information 11b, the processing of the host application 231 ends. If there is a file having the backup status information 11b, the process proceeds to step 3. In step 3, the backup status information 402 of the file in the flash memory card 311 whose backup is now started is rewritten to 01b. At the same time, the corresponding information in the backup list is also rewritten to 01b. Next, in step 3, the corresponding file is read from the flash memory card 311 and backed up to a predetermined directory in the HDD 211 of the personal computer 101. The directory on the HDD 211 at the time of backup is a directory prepared by default by the host application 231 or a directory prepared in advance by the user, and the file to be backed up has a file / directory tree structure built on the flash memory card 311. Assume that it is built under the directory and backed up. When the backup of the corresponding file is completed, the process proceeds to step 5. In step 5, the backup status information 402 of the file that has been backed up in the flash memory card 311 is rewritten to 00b. At the same time, the corresponding information in the backup list is also rewritten to 00b. Then, the process is transferred again to step 2, and all files having backup status information 11b are backed up.

  Next, the erasing method of the image file of the digital video camera 105 and the recording area of the flash memory card 311 in this embodiment will be described. When the digital video camera 105 is powered on in the backup mode, the digital video camera application 331 is activated. FIG. 8 shows a flow of processing after the digital video camera application 331 is activated. First, in step 1, an event that occurs when a certain time interval elapses or an event that is issued when the USB driver 225 detects recording processing from the personal computer to the flash memory card 311 is waited for. When an event is received, the process proceeds to step 2. In step 2, the backup status information of the file in the flash memory card is checked. Next, in step 3, it is determined whether there is a file whose backup status information is 00b. If the file having the backup status information 00b exists, the process proceeds to step 4; otherwise, the process proceeds to step 5. In step 4, the file having the backup status information 00b and the file deletion information 11b is deleted from the flash memory card, and the recording area in the flash memory card assigned to this file is erased. Here, an ERASE block in which an area that has been deallocated by erasing a file may include an area that is allocated by another file. In this case, the file system 322 or the card driver 323 is erased by temporarily saving data in an area allocated by another file, erasing this ERASE block, and then writing back the saved data. ERASE the area allocated to the file. Then, the process proceeds to step 5. In step 5, it is determined whether there is a file whose backup status information is 11b or 01b. If it exists, the process proceeds to step 1 again. If it does not exist, the process of the digital video camera application 331 ends.

  As described above, in the present embodiment, the host application 231 operating on the personal computer 101 records the backup status information in the flash memory card 211 of the digital video camera 105 via the USB cable 106, so that the digital video camera 105 The digital video camera application 331 operating above reads the backup status information recorded on the flash memory card 211 and deletes the backed up file. Therefore, even if the connection between the personal computer and the digital video camera is cut off during processing, files that have not yet been backed up are not deleted from the flash memory card. Even if the file is disconnected in the middle of deleting the file, the file is not deleted by the digital video camera itself, and the deletion process is not interrupted. In addition, since the unused area of the flash memory card is automatically ERASEd, the recording capability of the flash memory card can be restored without bothering the user.

(Embodiment 2)
Some video contents photographed and recorded by a digital video camera have an information part and a real data part in separate files as shown in FIG. A file 910 having an information portion stores information such as the shooting date and time and playback time of the video content, the file name of the actual data file 920, index information, and the like. The actual data file 920 stores the video content. Are recorded. Both of these files must exist in order to reproduce this video content. If the connection between the computer and the digital video camera is cut off during processing and only one file remains on the flash memory card, the content will be divided into both the personal computer and the digital video camera, and the content Can no longer be played.

In the second embodiment, even when contents composed of a plurality of files are recorded in a flash memory card of a digital video camera, these files are backed up safely.
The device configuration of this embodiment is not particularly different from that of the first embodiment.

  In the process of deleting the file in step 4 of the digital video camera application 331 of the first embodiment, before deleting the file with the backup status information 00b and the file deletion information 11b, It is checked if the backup status information of the file is 00b and the file deletion information is 11b. If not, the deletion is not sent. All the files constituting the video content are backed up and can be erased for the first time if they can be erased, and the video content can be prevented from being divided between the personal computer and the digital video camera.

  As described above, in the present embodiment, even when content composed of a plurality of files is recorded in the flash memory card of the digital video camera, the file can be safely deleted.

(Embodiment 3)
The third embodiment provides a function to efficiently ERASE a recording area in a flash memory card that has become unused due to the deletion of a file.
The device configuration of this embodiment is not particularly different from that of the first embodiment.

  In the process of erasing an unused area after erasing a file in step 4 of the digital video camera application 331 of the first embodiment, there is still another ERASE block including an area that has become unused as a result of erasing the file. If there is an area assigned to the file, the ERASE of that area is forgotten. Then, when all the areas of the ERASE block become unused, ERASE is performed in units of ERASE blocks. If it is determined in step 5 that there is no file whose backup status information is 11b or 01b, the unused area remaining without being erased is erased.

  As described above, in this embodiment, the digital video camera application 331 reduces the overhead due to ERASE of a partial area of the ERASE block by performing ERASE of the unused area in the flash memory card in units of ERASE blocks. Processing speed is improved.

  In this embodiment, the lifetime of the flash memory card can be extended by reducing the number of times of writing to the flash memory card.

(Embodiment 4)
In the fourth embodiment, a management file for managing information indicating the backup status and deletion status of each image file is created, thereby managing the backup status and deletion status of all the files collectively.
The device configuration of this embodiment is not particularly different from that of the first embodiment.

  FIG. 11 shows a management file of the file of the flash memory card 311 recorded in the file / directory structure as shown in FIG. In the management file, a path and file name to the file to be managed, information indicating the backup status, and information indicating the deletion status of the file are provided in a table format. The backup status information is set to 00b if the file has been backed up to a personal computer, 01b if the file is being backed up, 11b if the backup is desired and not backed up, and 10b if the backup is not desired. . This backup status information is recorded in the state 10b in which the backup is not desired when the management file is generated, and the backup is executed by the host application 231 by recording it in 11b by a user operation. The file erasure status information is set to 00b when the file is erased, 01b when it is being erased, 11b when it is desired to be erased but not yet erased, and 10b when it is not desired to be erased. This file erasure status information is recorded in the state 10b not desired to be erased when the management file is generated, and is erased by the host application 231 by being recorded in 11b by a user operation.

  Next, an image file backup method of the personal computer 101 in this embodiment will be described.

  FIG. 12 shows the flow of processing after the host application 231 is activated. First, in step 1, only the management file is read from the flash memory card 311 to create a backup list. Next, in step 2, a file having backup status information 11b is searched from the backup list. That is, it is determined whether there is a file that needs to be backed up in the flash memory card 311. If there is no file having the backup status information 11b, the processing of the host application 231 ends. If there is a file having the backup status information 11b, the process proceeds to step 3. In step 3, the backup status information in the management file corresponding to the file for starting backup in the flash memory card 311 is rewritten to 01b. At the same time, the corresponding information in the backup list is also rewritten to 01b. Next, in step 3, the corresponding file is read from the flash memory card 311 and backed up to a predetermined directory in the HDD 211 of the personal computer 101. When the backup of the corresponding file is completed, the process proceeds to step 5. In step 5, the backup status information in the management file corresponding to the file for which backup has been completed in the flash memory card 311 is rewritten to 00b. At the same time, the corresponding information in the backup list is also rewritten to 00b. Then, the process is transferred again to step 2, and all files having backup status information 11b are backed up.

  Next, the erasing method of the image file of the digital video camera 105 and the recording area of the flash memory card 311 in this embodiment will be described.

  FIG. 13 shows a flow of processing after the digital video camera application 331 is activated. First, in step 1, a management file is generated, and backup status information and file deletion status information of all files in the flash memory card are reflected in the management file. Next, in step 2, an event that occurs when a certain time interval elapses or an event that is issued when the USB driver 225 detects a recording process to the flash memory card 311 is waited for. When an event is received, the process proceeds to step 3. In step 3, the management file backup status information in the flash memory card is checked. Next, in step 4, it is determined whether there is a file whose backup status information is 00b. If the file having the backup status information 00b exists, the process proceeds to step 5; otherwise, the process proceeds to step 6. In step 5, the file having the backup status information 00b and the file deletion status information 11b is deleted from the flash memory card, and the recording area in the flash memory card assigned to this file is erased. Here, in the file erasure, file erasure status information for file erasure is first set from 11b to 01b. Then, file erasure is executed, and when the erasure is completed, the file erasure status information is set from 01b to 00b. Then, the process proceeds to step 6. In step 6, it is determined whether there is a file whose backup status information is 11b or 01b. If it exists, the process proceeds to step 2 again, and if not, the process proceeds to step 7. In step 7, the backup status information in the management file is reflected in each file that has not been deleted, and the management file is deleted. Then, the processing of the digital video camera application 331 ends.

  As described above, in this embodiment, a management file is created for managing the information indicating the backup status and the deletion status of each image file, whereby the backup status and the deletion status of all files are collectively collected. By managing, the digital video camera application 331 does not repeatedly check all files in the flash memory card, and the processing speed of the digital video camera application 331 is improved.

(Embodiment 5)
In the fourth embodiment, even if the connection between the personal computer 101 and the digital video camera 105 is disconnected for some reason during the process, the file on the flash memory card 311 of the digital video camera 105 does not fail. Image files that have already been backed up exist in the HDD 211 of the personal computer 101, and image files being backed up and files that have not yet been backed up exist in the flash memory card 311 of the digital video camera 105. Therefore, in the fifth embodiment, when the connection between the personal computer 101 and the digital video camera 105 is disconnected for some reason during the processing, the digital video camera application 331 determines that the processing has been once ended and erases the management file. To do.

  In step 6 of the digital video camera application 331 of the fourth embodiment, whether or not the backup status information of the management file has been updated for a predetermined time is added to the determination condition. The predetermined time is sufficient time for the personal computer 101 to back up the image file. If the backup status information is not updated within the predetermined time, the connection between the personal computer 101 and the digital video camera 105 is disconnected. Judge that In step 6, if there is no file whose backup status information is 11b or 01b, or if the backup status information of the management file has not been updated for a predetermined time, the process proceeds to step 7. In step 7, only the management file backup status information of 00b is reflected to the unerased file, the management file is erased, and the unused area in the flash memory recording medium is erased. Then, the processing of the digital video camera application 331 ends.

  As described above, in this embodiment, when the backup status information of the management file in the flash memory card is not updated for a predetermined time, it is determined that the connection between the personal computer 101 and the digital video camera 105 is disconnected, and the management file is deleted. By ending the processing of the digital video camera application 331, the processing of the digital video camera application 331 can be safely ended even if the connection between the personal computer 101 and the digital video camera 105 is disconnected.

  In the first to fifth embodiments, the information indicating the backup status and the information indicating the file erasure status are indicated by 4-bit values from 00b to 11b. However, the present invention can be similarly applied to other numerical forms that can indicate these statuses. It is.

  In the first to fifth embodiments, the personal computer 101 and the digital video camera 105 are connected by the USB 106. However, the present invention can be similarly applied even if they are connected by a general-purpose interface capable of transferring data such as IEEE1394.

  The information recording system according to the present invention is automatically and safely led by the information processing apparatus without causing any trouble to the user without adding a special function to a general-purpose interface such as a USB of the information processing apparatus. By deleting the backed up data in the information recording apparatus and erasing the unused area of the memory recording medium, the recording capability of the memory recording medium can be restored, and the information processing apparatus connected via the communication line It is useful as an information recording system comprising an information recording device.

Configuration diagram of digital video camera system according to Embodiment 1 of the present invention (1) Configuration diagram of digital video camera system according to Embodiment 1 of the present invention (2) Configuration of Digital Video Camera System in Embodiment 1 of the Present Invention (3) Configuration diagram of an image file in Embodiment 1 of the present invention Flow chart of host application in Embodiment 1 of the present invention File / directory structure diagram in flash memory card according to Embodiment 1 of the present invention Configuration diagram of backup list of host application in Embodiment 1 of the present invention Flowchart of digital video camera application in Embodiment 1 of the present invention Configuration diagram of an image file in Embodiment 2 of the present invention File / directory structure diagram in flash memory card according to Embodiment 4 of the present invention Management file configuration diagram of host application in Embodiment 4 of the present invention Flow chart of host application in Embodiment 4 of the present invention Flowchart of digital video camera application in Embodiment 4 of the present invention

Explanation of symbols

101 PC 102 Display 103 Keyboard 104 Mouse 105 Digital Video Camera 106 USB Cable 210 Hardware 211 HDD
212 Display Unit Interface 213 Operation Input Unit Interface 214 Disk IO Interface 215 USB Interface 220 Lower Layer Software 221 Output Device Management System 222 Input Device Management System 223 File System 224 Disk Driver 225 USB Driver 230 Upper Layer Software 231 Digital Video Camera Upper Layer Software 310 Hardware 311 Flash memory card 312 Operation input unit 313 Card IO interface 314 USB interface 320 Lower layer software 321 Operation unit management system 322 File system 323 Card driver 324 USB driver 330 Upper layer software 331 Digital video camera application 401 Band data 402 Backup status information 403 File deletion information 404 Image data 910 Information file 920 Actual data file

Claims (20)

In an information recording system in which an information processing apparatus and an information recording apparatus are connected via a communication means, the information processing apparatus reads information recorded on a recording medium of the information recording apparatus via the communication means. A first reading unit; and a first recording unit that writes information to the recording medium via the communication unit, wherein the information recording apparatus includes a second reading unit that reads information recorded on the recording medium; A second recording means for writing information to the recording medium, and the information recording apparatus reads the information recorded on the recording medium by the first recording means by the second reading means, An information recording system comprising control means for performing predetermined processing in accordance with read information. In an information recording system in which an information processing apparatus and an information recording apparatus are connected via a communication means, the information processing apparatus includes a first recording medium and a second recording medium of the information recording apparatus via the communication means. A first reading means for reading a file recorded on the first recording means; a backup means for backing up the file read by the first reading means to the first recording medium; and a first reading means of the information recording apparatus via the communication means. And a first recording means for writing information indicating the backup status of the file on the second recording medium, wherein the information recording device reads the information indicating the backup status recorded on the second recording medium. Means, and second recording means for writing information to the second recording medium, and the information recording device is further adapted to use the second reading means. Information recording system characterized by having a control means for erasing the file in the second recording medium in accordance with information indicating the backup situations that Desa see. 3. The information recording system according to claim 2, wherein the information indicating the backup status is information indicating that the corresponding file is in a status of not yet backed up, being backed up, or backed up. 4. The information recording system according to claim 2, wherein the second writing unit includes a unit for writing information indicating a file erasure status by the control unit. 5. The information recording system according to claim 4, wherein the information indicating the file erasure status is information indicating that the corresponding file is in any of the unerased state, the erasing state, and the erased state. 6. The information recording system according to claim 1, wherein the second recording medium is a flash memory recording medium. 7. The information recording system according to claim 6, wherein the information recording apparatus has ERASE means for erasing an unused area in the flash memory recording medium. The ERASE means, when the recording area in the flash memory recording medium becomes an unused state in units of ERASE blocks as a result of the file being erased by the control means, The information recording system according to claim 7, wherein: In the case where a plurality of files constituting one content are recorded on the second recording medium, the control means includes information indicating the backup status read by the second reading means for all the files constituting the content. 9. The information recording system according to claim 2, wherein the file is deleted when the file has been backed up. The first recording unit and / or the second recording unit records information indicating a backup status and / or information indicating a file erasing status in a unified management file in the second recording medium. 10. The information recording system according to claim 2, wherein the information recording system is characterized in that: The control means erases the predetermined management file when the information indicating the backup status read from the predetermined management file by the second reading means has not been recorded and updated for a predetermined time. The information recording system according to claim 10. The information recording system according to claim 1, wherein the communication unit is a USB (Universal Serial Bus). An information processing method of an information recording system in which an information processing device and an information recording device are connected via a communication line, wherein the information processing device is recorded on a recording medium of the information recording device via the communication line. A first reading step of reading out the information being recorded, a first recording step in which the information processing device writes information to the recording medium via the communication line, and a reading of information recorded in the recording medium by the information recording device A second reading step; and a second recording step in which the information recording device writes information to the recording medium, wherein the information recording device reads the information recorded on the recording medium in the first recording step. An information processing method for an information recording system, comprising: a control step of reading in a second reading step and performing a predetermined process in accordance with the read information. An information processing method for an information recording system in which an information processing device and an information recording device are connected via a communication line, wherein the information processing device is connected to a second recording medium of the information recording device via the communication line. A first reading step for reading a recorded file; a backup step for backing up the file read by the information processing device in the first reading step to a first recording medium included in the information processing device; and the information processing device. A first recording step of writing information indicating a backup status of the file to the second recording medium of the information recording device via the communication line, and the backup status recorded on the second recording medium by the information recording device. A second reading step for reading the indicated information, and a second recording step for the information recording apparatus to write information to the second recording medium. The recording device reads information indicating the backup status recorded on the second recording medium by the first recording step in the second reading step, and converts the backup status read in the second reading step into information indicating the backup status. An information processing method for an information recording system comprising a control step of erasing a file in the second recording medium in response. 15. The information processing method of the information recording system according to claim 14, wherein the second writing step includes a step of writing information indicating a file erasing state by the control step. The said 2nd recording medium is a flash memory recording medium, The said information recording apparatus has an ERASE process which ERASEs the unused area | region in the said flash memory recording medium, It is characterized by the above-mentioned. Information processing method of the information recording system. In the ERASE process, when the recording area in the flash memory recording medium becomes an unused state in units of ERASE due to the file being erased by the control process, the ERASE block that has become the unused state is erased. The information processing method of the information recording system according to claim 16, wherein: In the case where a plurality of files constituting one content are recorded on the second recording medium, the information indicating the backup status read in the second reading step is all the files constituting the content when the control step reads 18. The information processing method for an information recording system according to claim 14, wherein the files are deleted when the file has been backed up. In the first recording step and / or the second recording step, information indicating a backup status and / or information indicating a file erasing status is recorded in a predetermined management file in the second recording medium. The information processing method for an information recording system according to any one of claims 14 to 18, characterized in that: The control step deletes the predetermined file when the information indicating the backup status read from the predetermined management file in the second reading step has not been recorded and updated for a predetermined time. Item 20. An information processing method for an information recording system according to Item 19.

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