JP5632628B2 - Recording apparatus and control method thereof - Google Patents

Description

  The present invention relates to a recording apparatus and a control method thereof.

  2. Description of the Related Art Recording apparatuses that record and manage data on a recording medium in file units are known. A file system (for example, FAT (File Allocation Table)) in which a recording medium has a file management area and a file storage area is known as a file system used by the recording apparatus. The file management area is an area for storing management data such as directory entries and file entries, and the file storage area is an area for storing the substance (actual data) of data held by the file. The management data includes information on file names, information on the position of actual data on the recording medium, and the like.

  A digital video camera (DVC) as an example of such a recording apparatus records and manages a moving image file holding moving image data on a recording medium. In addition, as a management data, a DVC capable of recording information on a title of a moving image and information on a shooting order in addition to information on a file name and actual data position is also known.

  The recording apparatus can perform operations such as deleting a file, copying a file, and editing management data. When performing such an operation, the recording device accesses the file management area and the file storage area in a predetermined order, and deletes or updates data. Such a series of processes is called an operation sequence. For example, in an operation sequence (deletion sequence) for deleting a file, the actual data of the file to be deleted is deleted from the data storage area, and then the management data of the file to be deleted is deleted from the file management area.

  If an abnormality such as power interruption occurs during the operation sequence, the operation sequence is interrupted, causing inconsistency between the management data and actual data, or damage to the management data. Data failure can occur. For example, in the case of a deletion sequence, if the deletion sequence stops before the management data is deleted after the actual data is deleted, the management data corresponding to the deleted file remains. As a result, when attempting to access a file according to the management data, an error occurs because the actual data of the file does not exist.

  As a technique for suppressing the occurrence of such inconsistency, Patent Document 1 is known. Patent Document 1 stores information (log data) for a countermeasure when inconsistency occurs in a nonvolatile memory, and repairs inconsistency using the saved log data when an abnormality is detected. Has proposed.

JP 2005-115857 A

  However, when using the technique disclosed in Patent Document 1, the recording apparatus needs to include a nonvolatile memory for storing log data. This is a factor that increases the price of the recording apparatus.

  The present invention has been made in view of such a situation, and even when the recording device does not include a nonvolatile memory, a data failure that occurs when an operation sequence for the recording medium by the recording device stops halfway. The purpose is to provide a technology that enables the restoration of the problem.

In order to solve the above problems, a first aspect of the present invention, the actual data stored in the file, in accordance with a predetermined file system for recording and managing data for managing the file, in a recording apparatus for recording data According to a recording instruction, a file entry including a file name of a file in which actual data is stored and a recording position of the actual data in the recording medium is stored in the management data recorded on the recording medium. Recording means for writing the actual data to the recording medium, a character string for specifying a file name of the operation target file according to the operation instruction in response to an operation instruction for the file recorded on the recording medium, and the operation before including and extension showing the processing contents corresponding to the instruction, the file name with a predetermined file entry recorded on the recording medium It controls the recording device to store the management data, to provide a recording apparatus characterized by a control means for executing processing corresponding to the operation instruction.

  Other features of the present invention will become more apparent from the accompanying drawings and the following description of the preferred embodiments.

  With the above configuration, according to the present invention, even when the recording device does not include a nonvolatile memory, it is possible to repair a data failure that occurs when an operation sequence for the recording medium by the recording device is stopped halfway. Become.

The block diagram which shows the structure of DVC100 which concerns on 1st Embodiment. Schematic diagram of a file system according to the first embodiment The flowchart which shows the operation sequence which concerns on 1st Embodiment. The flowchart which shows the data restoration process which concerns on 1st Embodiment

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The technical scope of the present invention is determined by the claims, and is not limited by the following individual embodiments. In addition, not all combinations of features described in the embodiments are essential to the present invention.

[First Embodiment]
An embodiment in which the recording apparatus of the present invention is applied to a digital video camera (DVC) will be described. FIG. 1 is a block diagram showing the configuration of the DVC 100 according to the first embodiment. In FIG. 1, the user interface 106 receives instructions from the user such as recording start and recording end and notifies the control unit 109 of them. The control unit 109 includes a microcomputer, a RAM, a ROM, and the like, and controls the entire DVC 100 according to an input from the user interface 106 according to a program stored in the ROM.

  The encoding / decoding unit 101 encodes and decodes moving image data. When recording a moving image, the encoding / decoding unit 101 compresses and encodes the moving image signal input from the input / output unit 107 and outputs the compressed signal to the RAM 102 as stream data. Also, the encoding / decoding unit 101 notifies the control unit 109 of the result of compression encoding and the like. Also, the encoding / decoding unit 101 decodes moving image data read from the recording medium 104 or 108 and outputs it via the input / output unit 107 when reproducing a moving image.

  The RAM 102 is used for temporarily storing the encoded moving image data output from the encoding / decoding unit 101. The RAM 102 also serves as a cache for file system data for accessing the recording medium 104 or 108, a work memory for processing performed by the control unit 109, and the like.

  The recording medium control unit 103 outputs the moving image data stored in the RAM 102 to the recording medium 104 or 108 and records it as a file. In addition, the recording medium control unit 103 records information (management data) for managing a file holding moving image data on the recording medium 104 or 108. That is, moving image data (actual data) and management data are recorded separately on the recording medium 104 or 108. In addition, the recording medium control unit 103 reads a moving image file from the recording medium 104 or 108 when reproducing the moving image. The management data holds a file name, a recording order of moving image data, and the like. Therefore, the DVC 100 can reproduce the moving image data in the recording order when reproducing the moving image.

  The recording media 104 and 108 are, for example, flash memories, and store data in units of files according to the file system used by the control program of the control unit 109. The file includes actual data (for example, moving image data) for direct recording and management data for managing the file as components.

  The bus 105 connects the control unit 109, the encoding / decoding unit 101, the RAM 102, the recording medium control unit 103, and the input / output unit 107 to each other.

  When recording a moving image, the encoded moving image data generated by the encoding / decoding unit 101 is temporarily stored in the RAM 102. When encoded moving image data of a predetermined size is stored in the RAM 102, the control unit 109 controls the recording medium control unit 103 to write the encoded moving image data on the RAM 102 into the recording medium 104 or 108. In the present embodiment, it is assumed that the user selects one of the recording media 104 and 108 by operating the user interface 106. The recording medium control unit 103 records moving image data on the selected recording medium.

  Further, the DVC 100 of the present embodiment has a function of operating the recorded moving image file. Specific operations include, for example, a deletion operation for deleting unnecessary moving image files and a copy operation for copying a moving image file recorded on one of the recording media 104 or 108 to the other recording medium. . Further, the specific operation includes an editing operation for adding auxiliary information such as a title or changing auxiliary information to a moving image file.

  When performing each of these operations, the DVC 100 accesses the management data and actual data of the operation target file in a predetermined order (depending on the content of the operation, access to the actual data does not occur), and performs predetermined processing. . This series of processing flow is called an operation sequence. The operation sequence of the delete operation is called a delete sequence, the operation sequence of the copy operation is called a copy sequence, and the operation sequence of the edit operation is called an edit sequence.

  Next, the file system of this embodiment will be described with reference to FIG. The recording medium control unit 103 records and manages files on the recording media 104 and 108 using a file system 200 such as FAT (File Allocation Table), for example. The file system 200 includes a file management area 201 and a file storage area 202 in a recording medium. The file management area 201 is an area for storing management data such as directory entries and file entries (the auxiliary information described above is also stored in the file management area). The management data holds the file name of each file, the location of the file storage area where the actual data is recorded, and the like. The file storage area 202 is an area for storing the substance (actual data) of data held by the file.

  When recording data (data to be recorded) on a recording medium as a file, the recording medium control unit 103 registers a file entry in the file management area 201 and records data (actual data) in the file storage area 202. Save.

  When reading the data, the recording medium control unit 103 reads the management data from the file management area 201, acquires the recording position in the file storage area 202 from the file entry held by the management data, and actual data from the acquired recording position. Is read.

  Three file entries are recorded in the file management area 201 shown in FIG. Two actual data are recorded in the file storage area 202. A file entry 203 in the file management area 201 points to the actual data 204 in the file storage area 202. When reading the actual data 204, the recording medium control unit 103 reads the file entry 203 corresponding to the file name of the file holding the actual data 204 from the file management area 201. Then, the recording medium control unit 103 reads the actual data 204 from the recording position in the file storage area 202 indicated by the file entry 203.

  In FIG. 2, the file entry 205 does not indicate the file storage area 202 and does not have corresponding real data. Therefore, the file indicated by the file entry 205 is a file that exists as a file but does not have actual data (that is, the file size is 0).

  Next, an operation sequence according to the first embodiment will be described with reference to FIG. Unless otherwise specified, the processing of each step shown in this flowchart is realized by the control unit 109 executing the control program and controlling other units (for example, the recording medium control unit 103) as necessary. .

  In step S301, the control unit 109 receives an instruction to perform a predetermined operation on the file. Specifically, for example, the user operates the user interface 106 to select the operation target file and the operation content (for example, deletion). The control unit 109 receives this selection as an execution instruction.

  In step S <b> 302, the control unit 109 analyzes the execution instruction and identifies the operation content, the operation target file, and the recording medium that holds the operation target file. Then, operation information indicating the content of the operation and the operation target file is recorded on the specified recording medium. For example, the control unit 109 may record a file having a file name indicating the content of the operation and the operation target file (a file having no actual data) as the operation information on a recording medium.

  As an example, when recording a moving image, the DVC 100 records a moving image file with a file name having a number indicating the recording order and a predetermined extension. In this case, for example, if the content of the operation is deletion and the operation target file is the first recorded file, the file entry 205 shown in FIG. 2 is recorded as the operation information. The file name corresponding to the file entry 205 includes “000001” indicating the file name of the operation target file, “DEL” (deletion) indicating the contents of the operation, and “.” (Period) separating the two. Therefore, the fact that the file entry 205 is recorded on the recording medium means that a delete operation is performed with the first recorded file as the operation target file.

  When the operation content is copy, for example, “000001.CPY” is used as the file name, and when the operation content is editing, for example, “000001.EDT” is used as the file name. Here, “CPY” indicates copying, and “EDT” indicates editing.

  After recording the operation information, in step S303, the control unit 109 determines whether the operation content is “delete”, “copy”, or “edit”. If the content of the operation is “delete”, the process proceeds to S304, if “copy”, the process proceeds to S306, and if “edit”, the process proceeds to S308.

  S304 and S305 correspond to a deletion sequence. In step S304, the control unit 109 confirms the position of the actual data of the operation target file based on the management data of the operation target file, and deletes the actual data. In step S305, the control unit 109 deletes the management data of the operation target file.

S30 6 and S30 7 correspond to the copy sequence. In general, copying includes copying from an operation target recording medium to another recording medium and copying from another recording medium to an operation target recording medium. However, in the present embodiment, only copying from another recording medium to an operation target recording medium (copy destination recording medium) will be described. In the case of copying from an operation target recording medium to another recording medium, data change generally does not occur in the operation target recording medium, and therefore there is little possibility of data being damaged even if the operation sequence is interrupted. Because. Accordingly, the recording of the operation information in S302 is also performed on the copy destination recording medium. In step S306, the control unit 109 acquires management data of the operation target file from the copy source recording medium, and records the operation target file management data on the operation target recording medium (copy destination recording medium). In step S <b> 307, the control unit 109 acquires the actual data of the operation target file from the copy source recording medium, and records it in the operation target recording medium (copy destination recording medium).

  S308 to S310 correspond to an editing sequence. In the editing sequence, the auxiliary information (for example, the title of the moving image) included in the management data of the operation target file is changed, but the actual data is not changed. Since the editing sequence includes overwriting of management data, there is a possibility that the management data may be damaged if the editing sequence is interrupted because the power is shut off during the editing of the management data. In order to allow the damaged management data to be repaired, in S308 (before the start of editing), the control unit 109 generates a copy of the management data of the operation target file on the recording medium. In step S309, the control unit 109 executes management data editing. In S310 (after completion of editing), the control unit 109 deletes the duplicate. That is, when the editing sequence is executed, a copy is generated and deleted in addition to editing.

  After completion of the operation sequence described above, in step S311, the control unit 109 deletes the operation information generated in step S302.

  If an operation sequence is interrupted due to an abnormality such as a power interruption during the operation sequence, data failure such as inconsistency between management data and actual data or damage to management data may occur. May occur. For example, if the deletion sequence is interrupted after deleting the actual data of the moving image file and before deleting the management data (between S304 and S305), information on the deleted actual data remains in the management data.

  In such a state, there is a possibility that when the reproduction of the moving image is executed based on the management data, the actual data of the moving image file to be reproduced does not exist and an error occurs in the reproduction operation. Therefore, the DVC 100 of this embodiment executes the repair process shown in FIG. For simplification of description, the recording medium 104 is used as the recording medium in the description of FIG.

  When the power of the DVC 100 is turned on in S401, the DVC 100 performs a mounting process of the file system on the recording medium 104 in S402. The file system mount processing is processing for acquiring information on the recording medium 104 and information on the file system, recognizing the file management area 201 and the file storage area 202 on the recording medium 104, and making the file accessible. It is.

  In step S <b> 403, the control unit 109 determines whether operation information is recorded on the recording medium 104. It should be noted that not only when the operation sequence is interrupted but also when the execution of a series of controls (referred to as “file operation control”) in S302 to S311 in FIG. 3 is interrupted, operation information is recorded. It is to remain. Therefore, the determination in S403 means determining whether or not the execution of the file operation control is interrupted.

  Note that the timing at which the determination in S403 is performed is not limited to immediately after the file system is mounted. The determination in S403 may be performed at any timing as long as the file operation control is not being executed.

  When a file name is used as operation information, access to the file management area 201 is performed in S403, but access to the file storage area 202 is not necessary. This speeds up the determination process in S403. In addition, the possibility of a data failure occurring in the operation information itself is reduced.

  If the operation information is not recorded in the recording medium, it means that the file operation control has not been interrupted. Therefore, the process proceeds to S409, and the control unit 109 performs normal operations such as recording and playback of moving images. Process. If operation information is recorded in the recording medium, the process proceeds to S404.

  In step S <b> 404, the control unit 109 analyzes the operation information, and specifies the operation content and the operation target file regarding the interrupted file operation control. For example, if the operation information is the file entry 205 (FIG. 2), the content of the operation is “delete”, and the operation target file is the first recorded file.

  In step S405, the control unit 109 branches the process based on the content of the operation. If the content of the operation is “delete”, the process proceeds to S406, if “copy”, the process proceeds to S407, and if “edit”, the process proceeds to S408.

  Hereinafter, a specific example of the repair process will be described with reference to S406 to S408, but the present invention is not limited to the specific example described here. What is important is to repair data failures (inconsistency between management data and actual data, corruption of management data, etc.), and the specific measures for repair are the contents of the operation and the operation target. Those skilled in the art can appropriately determine based on the file. Examples include resuming the execution of the interrupted file operation control and returning the actual data and management data of the operation target file to the state before the execution of the interrupted file operation control.

  In step S406, the control unit 109 performs a deletion restoration process. Specifically, the control unit 109 determines whether the actual data and management data of the operation target file indicated by the operation information exist in the recording medium 104. As a result, the timing at which the file operation control is interrupted (for example, when management data exists and there is no real data, between S304 and S305) is specified. The control unit 109 resumes file operation control based on the identified timing. Thereby, for example, management data for which no corresponding actual data exists is deleted, and inconsistency between the actual data and the management data is repaired. In addition, when the file operation control is interrupted after the deletion stream is completed and before the operation information is deleted (between S305 and S311), the file operation control starts from S311 and unnecessary operation information is deleted. The

  In step S407, the control unit 109 performs copy restoration processing. Specifically, the control unit 109 determines whether actual data and management data of the operation target file exist in the recording medium 104, and deletes them if they exist. In addition, the control unit 109 deletes the operation information. As a result, the status of the actual data and management data of the operation target file is returned to the state before the execution of the interrupted file operation control is started, and the inconsistency between the actual data and the management data is repaired.

  In step S408, the control unit 109 performs editing repair processing. Specifically, since the management data of the operation target file may be damaged, the control unit 109 replaces the management data of the operation target file with the copy generated in S308 (FIG. 3). Next, the control unit 109 deletes the copy and the operation information. As a result, the state of the management data of the operation target file is returned to the state before the execution of the suspended file operation control is started, and the damage of the management data is repaired. Note that if file operation control is interrupted between S310 and S311, no copy exists, but in this case, the management data has been edited and the possibility of corruption is low, so the control unit 109 performs a repair process. Operation information without deleting.

  As described above, according to the present embodiment, the DVC 100 records the operation information before the start of the operation sequence, and deletes the operation information after the operation sequence is completed. The recording destination of the operation information is a recording medium on which the operation target file is recorded. When the operation information is detected at a timing when the file operation control including the recording and deletion of the operation information and the operation sequence is not being executed, the DVC 100 performs data restoration processing according to the operation information.

  As a result, even when the recording apparatus does not include a non-volatile memory, it is possible to repair a data failure that occurs when an operation sequence for the recording medium by the recording apparatus stops halfway.

[Other Embodiments]
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

Claims (9)

And the actual data stored in the file, in accordance with a predetermined file system for recording and managing data for managing the file, a recording apparatus for recording data,
In response to a recording instruction, a file entry including a file name of a file in which actual data is stored and a recording position of the actual data on the recording medium is stored in the management data recorded on the recording medium, and the actual data is stored. Recording means for writing data to the recording medium;
In response to the operation instruction of the recorded file in the recording medium has a string for specifying the file name of the operation target files by the operation instruction, and a suffix indicating the processing contents corresponding to the operation instruction including the file name, the predetermined file entry, controls the recording device to store the management data recorded on the recording medium, further comprising a control means for executing processing corresponding to the operation instruction A recording apparatus. In response to the operation instruction, the control means controls the recording means to store the predetermined file entry in the management data without recording actual data corresponding to the predetermined file entry. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus.   2. The control unit according to claim 1, wherein the control unit deletes the predetermined file entry from the management data recorded on the recording medium in response to completion of processing corresponding to the operation instruction. Recording device.   The control means executes the processing corresponding to the operation instruction after storing the predetermined file entry in the management data recorded on the recording medium in accordance with the operation instruction. The recording device described in 1.   The control means determines whether or not the predetermined file entry is stored in the management data recorded on the recording medium at a timing when the processing corresponding to the operation instruction is not being executed. The file entry is stored, and a repair process is performed based on the predetermined file entry, and the predetermined file entry is deleted from the recording medium after the repair process is completed. The recording device described in 1. When the process indicated by the extension of the file name included in the predetermined file entry is a deletion process, the control unit specifies the file name of the operation target file included in the predetermined file entry. 6. The recording apparatus according to claim 5, wherein the operation target file is specified based on the character string , and actual data of the operation target file and management data of the operation target file are deleted from the recording medium. . When the process indicated by the extension of the file name included in the predetermined file entry is a process of copying a file to the recording medium, the control unit includes the operation target file included in the predetermined file entry. The operation target file is specified based on a character string for specifying the file name, and the actual data of the operation target file and the management data of the operation target file are deleted from the recording medium. Item 6. The recording device according to Item 5. When the operation instruction is an instruction to edit the management data of the operation target file , the control means performs management data editing processing of the operation target file after copying the management data of the operation target file to the recording medium. Executing and storing the predetermined file entry in the management data by the recording means;
The process indicated by the extension of the file name included in the predetermined file entry determined to be stored in the management data at a timing when the process corresponding to the operation instruction is not being executed is the management data editing process. 6. The recording apparatus according to claim 5, wherein if there is, the management data of the operation target file is replaced with data copied to the recording medium. According to a predetermined file system for recording actual data stored in a file and management data for managing the file , a control method for a recording apparatus for recording data,
The management in which the recording unit of the recording device records a file entry including a file name of a file in which actual data is stored and a recording position of the actual data on the recording medium in accordance with a recording instruction. A recording step of storing in the data and writing the actual data to the recording medium;
Control means of the recording apparatus, according to an operation instruction of the recorded file in the recording medium, a character string for specifying the file name of the operation target files by the operation instruction, the processing contents corresponding to the operation instruction the includes the file name with a suffix indicating the predetermined file entry, controls the recording process to store the management data recorded on the recording medium, a process corresponding to the operation instruction And a control process to be executed.

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