JP2010020576A - Recording control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording control device capable of recording file data in a write-once type storage medium in a plurality of batches. <P>SOLUTION: The recording control device 1 for recording data in a write-once type storage medium 30 includes a memory 17 for temporarily storing data and a write control part 10. In data management regions, when data stored in the memory 17 is read out by a predetermined unit sequentially and the read-out data by the predetermined unit is recorded in the storage medium sequentially, the write control part 10 secures continuous data management regions of the number corresponding to the size of the read-out data by the predetermined unit, and a subsequent data management region following the continuous data management regions. In the respective data management regions other than the rearmost one of the secured data management regions, the write control part 10 performs link information write processing for writing the information indicating the subsequent data management region following the data management regions as the readout order, and performs control so as to write the read-out data by the predetermined unit in the data storage regions corresponding to the data management regions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording control apparatus for recording data on a write-once storage medium.

2. Description of the Related Art Conventionally, devices such as digital cameras that can be loaded with a storage medium such as a memory card or a memory stick have become widespread. Such storage media include rewritable storage media, write-once storage media that can be written only once, and the like. The following Patent Document 1 and Patent Document 2 disclose file management techniques for write-once storage media.
JP 2007-18528 A JP 2003-196142 A

  By the way, the storage medium such as the above-mentioned memory card is often formatted by applying a FAT (File Allocation Tables) file system. This FAT file system manages files recorded in a data storage area by using file management information called FAT configured with FAT entries corresponding to each data storage area in cluster units. In the FAT entry of each cluster in which file data is stored, the cluster number to be read next to the cluster is recorded as the reading order of the file data, and the terminal symbol is recorded in the FAT entry of the cluster having the last reading order. Is done. When recording data from a host device such as a PC or digital camera on a storage medium such as a memory card to which such a FAT file system is applied, the host device temporarily stores the data of the file to be recorded in the built-in memory, Each time the data in the built-in memory is recorded in the storage medium, the cluster is secured by referring to the FAT, the reading order and the terminal symbol are recorded in the FAT entry of the secured cluster, and the data is recorded in the corresponding cluster. Therefore, for example, when recording a content such as a movie whose file size cannot be predicted during recording, one file data is recorded in a plurality of times. Each time recording is performed, a FAT entry for the file data is recorded. It is necessary to rewrite and update the FAT entry so that the terminal symbol is set to the FAT entry corresponding to the last cluster of the written data at that time. In addition, considering that it is possible to interrupt other processing while recording one file data, etc., when recording one file data divided into a plurality of times, a terminal symbol is recorded for each recording as described above. It needs to be rewritten and updated.

  However, when recording file data such as a moving image larger than the capacity of the built-in memory on the write-once storage medium, the reading order and the terminal symbol are recorded in the FAT entry for each recording of the file data stored in the built-in memory. In this case, the terminal symbol recorded in the FAT entry cannot be rewritten, and thus one file data cannot be recorded in a plurality of times.

  An object of the present invention is to provide a recording control apparatus capable of recording file data on a write-once type storage medium in a plurality of times.

  The recording control apparatus of the present invention stores file data in a data storage area managed in units of a predetermined size, and stores the data stored in the data storage area in a data management area corresponding to each of the data storage areas. A recording control apparatus for recording data on a write-once storage medium that stores link information indicating a reading order or reading completion, the memory temporarily storing the data, and the data stored in the memory Is sequentially read in a predetermined unit, and when the read data in the predetermined unit is sequentially recorded in the storage medium, the number of the continuous data corresponding to the size of the read data in the predetermined unit in the data management area The management area and the next data management area following the continuous data management area are secured, and the secured data management area In each data management area other than the last of the areas, link information writing processing is performed to write information indicating the next data management area following the data management area as the read order, and the data management area corresponding to the data management area A write control unit that controls to write the data of the predetermined unit read into the data storage area.

  According to the present invention, file data can be recorded in a plurality of times on a write-once storage medium.

  Hereinafter, a camera including a recording control apparatus according to an embodiment of the present invention will be described. In the present embodiment, a process of recording a still image file of one frame on a memory card in a plurality of times in the camera will be described.

  FIG. 1 is a block diagram showing the configuration of the camera of this embodiment. As shown in the figure, the camera 1 includes a photographing lens 11, a CCD 12, a CCD driver 13, a preprocess circuit 14, an A / D conversion circuit 15, an ASIC (Application Specific Integrated Circuit) 16, a memory 17, a color monitor 18, and an operation. A unit 19, a memory card I / F 20, an external I / F 21, and a CPU 10 are configured.

  The CCD 12 images subject light via the photographing lens 11 and accumulates charges corresponding to the brightness of the subject, and outputs an analog signal of the accumulated charges to the preprocess circuit 14 under the control of the CCD driver 13. The preprocess circuit 14 amplifies the analog signal output from the CCD 12 and performs analog processing such as noise removal and black level adjustment. The A / D conversion circuit 15 receives the analog signal analog-processed by the preprocess circuit 14. Convert to digital signal. Further, the ASIC 16 performs image processing such as contour compensation and gamma correction on the digital signal converted by the A / D conversion circuit 15, and in accordance with the Exif (Exchangeable Image File Format) standard, the shooting date and time of the image data, the shutter speed. Header information data including compression information and the like, and thumbnail image data obtained by reducing the image data after image processing of the image data to a predetermined size, and generating header information data, thumbnail image data, and image data after image processing (hereinafter, "Main image data") is compressed by a method such as JPEG to generate an image file.

  The memory 17 is composed of a DRAM (Dynamic Random Access Memory) and is a work memory used when the CPU 10 executes a program, and temporarily stores image data after image processing. The color monitor 18 includes a liquid crystal display, and displays images, camera setting information, and the like. The operation unit 19 includes operation buttons such as a power switch and a release button, and accepts user operations.

  The memory card I / F 20 is a connection interface with the removable memory card 30 and relays transmission / reception of read / write commands, data, and the like between the mounted memory card and the camera 1. The external I / F 21 is a connection interface such as a USB for connecting a device such as a PC, and relays communication between the connected device and the camera 1.

  The memory card 30 is a write-once memory card, and controls data writing or reading in accordance with a flash memory for storing data and a read / write command transmitted from the camera 1 via the memory card I / F 20. And a register for storing card attribute information such as data write unit information and information indicating that the medium is a write-once medium, and is formatted by applying a FAT file system. The memory card 30 transmits a command response to the camera 1 when receiving a command from the camera 1, and transmits a data response to the camera 1 every time data is written. Further, it is assumed that the data writing unit of the memory card 30 of the present embodiment is 3 cluster units.

  CPU10 controls each part which comprises the camera 1 by running the program memorize | stored in ROM which is not shown in figure. Also, using the FAT file system of the memory card 30, issue a write command to write the image file read from the memory 17 to the memory card 30 in accordance with the DCF standard, or read command to read the image file stored in the memory card 30 And data transfer to and from the memory card 30 is performed. In addition, when writing the image data of the image file stored in the memory 17 to the memory card 30, it is read in a plurality of times, and a write command is issued each time the data is read.

  FIG. 2 is a configuration diagram of the FAT file system described above. The FAT file system includes a file management area including a BPB (BIOS Parameter Block) 210, a FAT (File Allocation Table) 220, and a ROOT 230, and a data storage area 240 managed in cluster units including a plurality of sectors. The BPB 210 stores information such as the number of sectors included in one cluster, the number of bytes in one sector, the size of the root directory, and the FAT type of FAT16 or FAT32.

  The root 230 stores the cluster name of the cluster that stores the folder name of the root directory and the subdirectories immediately below the root directory. Each FAT entry 221 in the FAT 220 corresponds to each cluster in the data storage area 240 and is arranged in the order of the cluster number. For example, the FAT entry 222 corresponds to the cluster 2, and the FAT entry 223 corresponds to the cluster 3. Each FAT entry 221 stores a cluster number to be read next to the cluster as a reading order.

  The data storage area 240 is composed of a plurality of clusters assigned with cluster numbers in order from the first cluster having the cluster number “2”, and each cluster stores file data such as JPEG data and RAW data.

  Next, the operation of the camera 1 will be described using the flowchart of FIG. FIG. 3 is a flowchart of processing for recording an image file on a write-once storage medium. When the power is set to ON by the user using the operation unit 19 (step S11), the CPU 10 determines whether or not the memory card 30 is attached to the memory card I / F 20 (step S12).

  When the CPU 10 determines that the memory card 30 is not attached to the memory card I / F 20 (step S12: N), the CPU 10 terminates the process and determines that the memory card 30 is attached ( In step S12: Y), the card attribute information and the FAT file system are acquired from the memory card 30 and stored in the memory 17 (step S13).

  When the release button of the operation unit 19 is fully pressed by the user (step S14: Y), the CPU 10 captures the subject light, generates image data based on the imaging signal output from the CCD 12, and outputs the image data to the memory 17. (Step S15). Then, the ASIC 16 performs image processing on the image data stored in the memory 17 to generate thumbnail image data, and compresses the main image data and the thumbnail image data by the JPEG method (step S16). The CPU 10 stores the header data of one frame, the image data including the compressed thumbnail image data and the main image data in the memory 17 (step S17), and records the one frame of image data stored in the memory 17 on the memory card 30. Is performed (step S18).

  FIG. 4 is a flowchart of the recording process in step S18. The writing unit of the memory card 30 is smaller than the storage capacity of the memory 17, and one frame of image data is recorded on the memory card 30 in a plurality of times.

  The CPU 10 recognizes that the memory card 30 is a write-once medium from the card attribute information acquired in step S13, refers to the writing unit of the card attribute information, and stores image data for three clusters in the writing unit from the memory 17. Read (step S201). Here, FIG. 5 and FIG. 6 show an example of the FAT file system from before the image file is recorded on the memory card 30 until the image file data is recorded in four times. Hereinafter, each step of FIG. 4 will be described with reference to FIGS. 5 and 6 as appropriate.

  FIG. 5A shows the FAT file system read in step S201. As shown in the figure, the ROOT 230 stores a “DCIM” folder generated in accordance with the DCF standard as a root directory, and a cluster “2” that stores subdirectories directly under the DCIM. Further, the data storage area 241 of the cluster 2 that stores the subdirectories directly under the DCIM has a cluster as a directory entry area that stores the subdirectory “100NIKON” generated according to the DCF standard and the file information of the image file stored in the 100NIKON. The number “3” is stored, and the terminal symbol “E” is stored in the FAT entries 220 a and 220 b of the cluster 2 and the cluster 3. In this embodiment, the image file read from the memory 17 is recorded immediately under the subdirectory “100NIKON”, and the file information including the file name of the image file and the start cluster in which the file is stored is The data is recorded in the data storage area 242 of the cluster 3, which is a directory entry area.

  The CPU 10 refers to the FAT 220 in FIG. 5A, secures clusters 4 to 7 for 4 clusters obtained by adding 1 to 3 clusters of the number of write units, and reads the data for 3 clusters read to the secured clusters 4 to 6 Image data is sequentially assigned, and a reading order indicating the next cluster number is set in each FAT entry of the clusters 4 to 6 excluding the cluster 7 (step S202). Note that when securing a cluster on the FAT, a cluster of consecutive FAT entries in which the reading order or terminal symbol is not stored is secured.

  The CPU 10 writes a read order to the FAT entries of the clusters 4 to 6 excluding the secured last cluster 7, and issues a write command for writing the image data read in step S201 to each data storage area of the clusters 4 to 6. The read image data is transmitted to the memory card 30 (step S203).

  When the memory card 30 receives the write command and the image data via the memory card I / F 20, the memory card 30 transmits a command response to the camera 1, writes the reading order to each FAT entry according to the received write command, and stores the data of the cluster 4 Image data is written sequentially from the first sector of the storage area, and a data response is transmitted via the memory card I / F 20 (step S204).

  FIG. 5B shows the FAT file system of the memory card 30 after the first reading of image data from the memory 17 (step S201) and the processing of steps S202 to 204 described above. As shown in the figure, the reading order “5, 6, 7” indicating the next cluster number is recorded in each FAT entry 220c of the clusters 4 to 6 except for the FAT entry 220d of the last cluster 7 secured. In the data storage areas 243 of the clusters 4 to 6, the header information of the image file, the thumbnail image data, and a part of the main image data of the image file are recorded. Note that the data storage area 243 'of the cluster 7 is secured by the first data read, but no data is recorded at this time.

  The CPU 10 repeats the processing from step S201 onward until reading of the image data in the memory 17 is completed (step S205: N), and each time the image data is read, the FA 220 adds 1 to the number of write units. The cluster for the cluster is secured, the FAT entry of the secured cluster is written, and the main image data for the write unit of 3 clusters is written.

  FIG. 5C shows the FAT file system after the image data is read for the second time following FIG. 5B and the image data is written to the FAT entry and the data storage area. As shown in the figure, clusters 7 to 10 are secured by the second readout of the image data, and the readout order for the FAT entries 220d and 220e excluding the FAT entry 220f of the secured last cluster 10 is recorded. Main image data is recorded in the data storage areas 244 of the clusters 7 to 9 except for the ten data storage areas 244 ′.

  FIG. 6A shows the FAT file system after the image data is read for the third time following FIG. 5C and the image data is written to the FAT entry and the data storage area. As shown in the figure, clusters 10 to 13 are secured by the third readout of the image data, and the readout order for the FAT entries 220f and 220g excluding the FAT entry 220h of the secured last cluster 13 is recorded. Main image data is recorded in the data storage areas 245 of the clusters 10 to 12 except for the 13 data storage areas 245 ′.

  In FIG. 6B, the image data is read for the fourth time following FIG. 6A, and the clusters 13 to 16 are secured by reading the image data for the fourth time, and the FAT of the last cluster 16 secured is secured. The reading order is recorded in the FAT entries 220h and 220i excluding the entry 220j, and the main image data is recorded in the data storage areas 246 of the clusters 13 to 15 excluding the data storage area 246 ′ of the cluster 16.

  Returning to FIG. 4, when the CPU 10 finishes reading the image data of the image file from the memory 17 (step S <b> 205: Y), the CPU 10 writes the terminal symbol in the FAT entry of the last secured cluster 16, and A write command for writing the image file name “DSC — 0001.JPG” and the start cluster number “4” of the image file as file information is issued to the data storage area (step S206). The memory card 30 receives the write command issued in step S206 via the memory card I / F 20, transmits a command response via the memory card I / F 20, and according to the received write command, the FAT entry of the cluster 16 Is written in the data storage area of the cluster 3, file information of the file name “DSC — 0001.JPG” and the start cluster number “4” is written, and a data response is transmitted via the memory card I / F 20 (step S207). .

  FIG. 6C shows the FAT file system after the end of the reading of image data from the memory 17 and the end processing in steps S206 to S207 after FIG. 6B. As shown in the figure, the terminal symbol “E” is recorded in the FAT entry 220j of the last cluster 16, and the image file name “DSC — 0001.JPG” and the start cluster number “4” are stored in the data storage area 242 of the cluster 3. "Is recorded.

  In the above-described embodiment, every time data of a predetermined size is read from the memory, one extra cluster is secured from the number of clusters necessary for writing the read data of the predetermined size, and writing of one file is completed. Nothing is written in the FAT entry of the cluster reserved for each data read. Therefore, data can be written continuously until data writing is completed, and data of one file can be written in a plurality of times.

  In the above-described embodiment, the terminal symbol is recorded in the FAT entry of the last cluster secured when the data writing process is completed, but no data is recorded in the data storage area of the cluster. Since the writing process is completed, the data storage area of the cluster is wasted. However, since the FAT entry and the data storage area in the middle of recording one file are kept so that the data storage states coincide with each other, for example, an interrupt process such as a memory card being removed during recording occurs. However, there is no inconsistency on the file system.

  Next, a first modification of the above-described embodiment will be described. In the above-described embodiment, the case where a writing error does not occur while image data is being written to the memory card 30 has been described. In this modification, an error process when a writing error occurs in the memory card 30 will be described. The configuration of the camera according to the present modification is the same as that of the camera according to the above-described embodiment, and will be described using the same reference numerals as those in the embodiment. Further, in this modification, when a write error occurs in the memory card 30, a write error occurrence notification is transmitted from the memory card 30 to the camera 1.

  FIG. 7 is a flowchart showing the operation of the camera 1 according to this modification. Steps S301 to S304 in FIG. 7 are the same as steps S201 to S204 in FIG. 4 showing each process before image data is written to the memory card 30, and steps S306 to S308 in FIG. 4 is the same as steps S205 to S207 in FIG. 4 showing the image data writing process, and detailed description of steps S301 to S304 and steps S306 to S308 is omitted. 8 and 9 show an example of the FAT file system of the memory card 30 in the present modification, and the operation of this modification will be described below with reference to each drawing as appropriate.

  FIG. 8A shows the FAT file system before recording image data. The FAT entry 224 of the cluster 4 does not store the reading order or the terminal symbol, but the data storage area 343 of the cluster 4 does not store it. Is a state where data is stored and inconsistency occurs in the file system.

  In FIG. 8B, the CPU 10 reads out the image data for three clusters in writing unit from the memory 17 (step S301), secures the clusters 4 to 7 by referring to the FAT 220 in FIG. The FAT file system is shown when a write command for writing data in the data storage areas of clusters 4 to 6 in which data is secured is issued. As shown in the figure, in the memory card 30, the reading order is recorded in the FAT entries 224 to 226 excluding the secured last cluster 7 (steps S301 to S304), and the leading sector of the data storage area 343 of the cluster 4 is recorded. When the image data is written from the above, a write error occurs because the data is already recorded in the data storage area 343 of the cluster 4.

  Returning to FIG. 7, when the CPU 10 receives a write error occurrence notification response from the memory card 30 (step S305: Y), the CPU 10 re-reads the image data for three clusters in writing unit from the memory 17 (step S301). With reference to the FAT 220 in FIG. 8B, four clusters corresponding to four clusters obtained by adding 1 to the number of write units are re-reserved from the cluster after the last cluster 7 secured immediately before the write error occurs (step S302). . Then, in the memory card 30, data is recorded in the FAT entry and the data storage area of the re-secured cluster (Steps S303 and S304).

  FIG. 9A shows the FAT file system after performing the above-described steps S301 to S304 after an error has occurred. As shown in the figure, the clusters 7 to 10 including the last cluster 7 secured before the occurrence of the error are secured again and read to the FAT entries 227 to 229 of the clusters 7 to 9 except the FAT entry 230 of the cluster 10. The order “8-10” is recorded, and the read image data is rewritten in the data storage area 346 of the clusters 7-9.

  Returning to FIG. 7, when the reading of the image data of the image file is finished, that is, when the writing of the image file is finished (step S <b> 306: Y), the CPU 10 writes a terminal symbol in the secured last cluster, File information is written in the directory entry area (steps S307 and S308). FIG. 9B shows the FAT file system when reading of the image data is finished and writing of the image file is finished. As shown in the figure, the terminal symbol “E” is recorded in the FAT entry 230 of the last cluster 10, and the image file name “DSC — 0001.JPG” and the cluster number “7” that started rewriting are the cluster information. 3 data storage area 342. Accordingly, no data is recorded in the data storage areas 345 of the clusters 5 and 6 secured immediately before the occurrence of the error and the data storage area 346 ′ of the last cluster 10 secured at the end of reading of the image data.

  In the first modification described above, since the reading order and the terminal symbol are not recorded in the FAT entry of the last cluster that is reserved extra each time data is read, error handling is performed when a write error occurs. Rewriting can be started from the last cluster reserved immediately before the occurrence. Therefore, even when a write error or an interrupt process occurs, it is possible to use a cluster area that is reserved extra for each data read without causing inconsistency in the file system and without wasting it. Further, by writing the image file name and the file information of the start cluster when the writing of the image file is finished, the same file name as before the writing error can be set at the time of rewriting after the writing error occurs.

  Next, a second modification of the embodiment will be described. In this modification, when a write error occurs in the memory card 30, error processing different from that in the first modification is performed. Note that the camera according to this modification has the same configuration as the camera of the embodiment, and will be described using the same reference numerals as those of the embodiment. In the present modification, when a write error occurs in the memory card 30, a write error occurrence notification including the number of the error cluster in which the write error has occurred is transmitted from the memory card 30 to the camera 1.

  FIG. 10 is a flowchart showing the operation of the camera 1 according to this modification. Steps S401 to S404 are the same as steps S201 to S204 in FIG. 4 showing processing until a write error occurs in the memory card 30, and steps S408 to S410 are image data when no write error occurs. Since this is the same as steps S205 to S207 in FIG. 4 showing the writing process, detailed description of steps S401 to S404 and steps S408 to 410 will be omitted.

  As in the first modification described above, in the memory card 30, when image data is written to the data storage area of the cluster specified by the write command issued by the CPU 10, the data is already stored in the data storage area of the cluster. It is assumed that a write error has occurred and the CPU 10 has received a write error occurrence notification from the memory card 30 (step S405: Y).

  In that case, the CPU 10 according to the present modification reads the image data from the memory 17 again (step S406), and the cluster for 4 clusters obtained by adding 1 to the number of write units from the clusters following the error cluster on the FAT. Is secured again (step S407), and the processing from step S403 is performed.

  FIG. 11 shows an example of the FAT file system of the memory card 30 in the present modification. As in FIG. 8 described in the first modification, clusters 4 to 7 are secured on the FAT, and the memory card 30 It is assumed that a write error has occurred in the data storage area 443 of the cluster 4. Hereinafter, each figure will be described together with each step of the error processing according to this modification described above.

  FIG. 11A shows the FAT file system when a write error occurrence notification including the error cluster number “4” is transmitted from the memory card 30. As shown in the figure, clusters 4 to 7 are secured on the FAT, and the reading order is recorded in the FAT entries 224 to 226 of the clusters 4 to 6.

  FIG. 11B shows the FAT file system after error processing is performed for a write error that has occurred in the data storage area 443 of the cluster 4. As shown in the figure, the clusters 5 to 8 (FAT entries 225 to 228) subsequent to the error cluster 4 on the FAT are re-reserved with respect to the image data of three clusters read again after the writing error occurrence notification. (Step S407). In the memory card 30, the reading order is recorded in the FAT entry 227 in which the reading order is not recorded in FIG. 11A among the FAT entries 225 to 227 in the clusters 5 to 7 except the FAT entry 228 in the cluster 8. Then, the read image data for three clusters is rewritten in the data storage areas 444 of the clusters 5 to 7 except for the data storage area 444 ′ of the cluster 8 (steps S403 and S404).

  FIG. 11C shows the FAT file system when the rereading of the image data from the memory 17 is completed after FIG. 11B. As shown in the figure, the terminal symbol “E” is recorded in the FAT entry 228 of the last cluster 8 secured at the end of rereading of the image data, and rewriting is started with the image file name “DSC — 0001.JPG”. The file information of the cluster number “5” is recorded in the data storage area 442 of the cluster 3 (Step S408: Y, Steps S409 and S410). Therefore, similarly to the embodiment, the file writing is finished in a state where data is not recorded only in the data storage area 444 ′ of the last cluster 8 secured last.

  In this modification, when a write error occurs while writing image data to the memory card 30, it is possible to re-secure the cluster from the clusters following the error cluster and start rewriting the image data. For this reason, the number of useless clusters can be reduced as compared with the first modified example, except that a write error occurs in the last cluster of the write unit.

  In the above-described embodiment and modification, the camera is used as the recording control device. However, the recording control device may be an information device such as a mobile phone, a PDA, or a PC that can be mounted with a write-once storage medium.

  In the above-described embodiment and modification, the description has been given using still image data compressed by the JPEG method as file data to be recorded on the memory card. However, TIFF image data or RAW image data may be used. It may be moving image data or audio data.

It is a block diagram of the camera concerning an embodiment. It is a block diagram of the FAT file system in the embodiment. It is a flowchart which shows operation | movement of the camera which concerns on embodiment. It is a flowchart which shows the image data recording process of the camera which concerns on embodiment. 2A and 2B are diagrams illustrating an example of a FAT file system in the embodiment, where FIG. 1A is a FAT file system before recording an image file, FIG. 1B is a FAT file system at the time of first image data recording, and FIG. This is a FAT file system at the time of recording. 2A and 2B are diagrams illustrating an example of a FAT file system in the embodiment, where FIG. 3A is a FAT file system at the time of third image data recording, FIG. 2B is a FAT file system at the time of fourth image data recording, and FIG. This is a FAT file system at the end of file recording. It is a flowchart which shows operation | movement of the camera which concerns on a 1st modification. It is a figure which shows the FAT file system example in a 1st modification, (A) is a FAT file system before image file recording, (B) is a FAT file system at the time of the writing error generate | occur | produced at the time of image data recording. It is a figure which shows the FAT file system example in a 1st modification, (A) is a FAT file system at the time of image data rewriting after an error occurrence, (B) is a FAT file system at the time of completion of recording of an image file. . It is a flowchart which shows operation | movement of the camera which concerns on a 2nd modification. FIG. 10 is a diagram illustrating an example of a FAT file system in a second modification, where (A) is a FAT file system when a write error occurs, (B) is a FAT file system when image data is rewritten after an error occurs, and (C). Is a FAT file system at the end of recording of an image file.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... CPU, 11 ... Shooting lens, 12 ... CCD, 13 ... CCD driver, 14 ... Preprocess circuit, 15 ... A / D conversion circuit, 16 ... ASIC 17 ... Memory, 18 ... Color monitor, 19 ... Operation unit, 20 ... Memory card I / F, 21 ... External I / F, 30 ... Memory card

Claims (4)

A link that stores data of a file in a data storage area managed in units of a predetermined size, and indicates a read order or a read end of the data stored in the data storage area in a data management area corresponding to each of the data storage areas A recording control apparatus for recording data on a write-once storage medium for storing information,
A memory for temporarily storing the data;
When the data stored in the memory is sequentially read in a predetermined unit and the read data in the predetermined unit is sequentially recorded in the storage medium, the size of the read data in the predetermined unit is set in the data management area. In accordance with the number of the data management areas corresponding to the number and the next data management area following the continuous data management area, in each of the data management areas other than the last of the data management areas secured, A link information writing process for writing information indicating the next data management area following the data management area as the reading order is performed, and the read data of the predetermined unit is written in the data storage area corresponding to the data management area A recording control device comprising: a writing control unit that controls the recording control unit.   When the write control unit finishes writing all of the data of the predetermined unit sequentially read from the memory, the last of the data management areas reserved for the data read at the end of the data The recording control apparatus according to claim 1, wherein an end process is performed to write the read end link information in a data management area. The storage medium stores a read start position of the file stored in the data storage area in a predetermined data storage area,
In the data storage area corresponding to the secured data management area, the write control unit re-uses the data stored in the memory in the predetermined unit when a write error occurs during the writing of the read data. In the data management area after the last data management area secured immediately before the read / write error occurs, the data management area is secured again, and the data other than the last in the data management area secured again The link information writing process for the management area, and the rewriting process for writing the data of the predetermined unit read again to the data storage area corresponding to the data management area, and the predetermined unit of the predetermined unit read again from the memory When the rewriting process of all the data is completed, It performs processing, the information of the data storage area was started rewriting process, the recording control apparatus according to claim 2, wherein writing to a given said data storage area as the reading start position of the file. The storage medium stores a read start position of the file stored in the data storage area in a predetermined data storage area,
In the data storage area corresponding to the secured data management area, when a write error occurs during the writing of the read data, the write control unit follows the data storage area in which the write error has occurred. In the data management area corresponding to each data storage area, the data management area is secured again, and the link information writing process for the data management area other than the last of the data management areas secured again, and the data A rewrite process for writing the data read again to the data storage area corresponding to the management area, and the completion when all the rewrite processes of the data in the predetermined unit read again from the memory are completed. And the data storage area that has started the rewrite process. The information recording control apparatus according to claim 2, wherein writing to a given said data storage area as the reading start position of the file.

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