JP2004343682A - Camera recorder and data recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera recorder and its recording medium that can make high speed recording and reproducing of a large amount of image data. <P>SOLUTION: This camera recorder has a camera 1, a recorder 2 to record the image data photographed with the camera 1. The recorder 2 has an interface 3 to input the image data from the camera 1, memory cards 50-53 to record the image data, and a control 4 to control the image data writing to the memory cards 50-53. The memory cards 50-53 consist of flash memories, and the control 4 converts the image data inputted from the camera 1 through the interface into the blocks of an integral multiple size of the recording blocks of the flash memory and record them in parallel in the memory cards 50-53. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a data recording medium configured using a memory card and a camera recorder using the data recording medium.

  A memory card, which is a card-type recording medium having a built-in flash memory such as an SD card, is ultra-small and ultra-thin, and is widely used in digital devices such as digital still cameras because of its easy handling.

  However, currently available memory cards have a maximum recording capacity of 512 MB and a maximum recording rate of 10 MB / sec. When recording video signals for a long time on such a memory card, the recording capacity is insufficient. For example, recording a DV (digital video) video signal and an audio signal requires a bandwidth of about 4 MB / sec, and a 512 MB memory card can record only about 2 minutes.

  Japanese Patent Laying-Open No. 2002-189992 (Patent Document 1) discloses that a memory card drive body having an external interface is provided with a plurality of memory card mounting portions, and a plurality of memory cards are mounted on these mounting portions. There has been disclosed a technology that enables a large amount of information to be recorded by one memory card drive.

Also, Japanese Patent Application Laid-Open No. 2000-207137 (Patent Document 2) discloses that a disk system having a desired capacity is configured by combining hand-held semiconductor disks according to applications.
JP-A-2002-189992 (pages 3 to 5, FIG. 1) JP-A-2000-207137 (pages 3 to 6, FIG. 1)

  However, in the conventional memory card drive, although a plurality of memory cards are packed into one pack to increase the recording capacity, the transfer rate has not been increased. Therefore, a high-resolution video signal having a recording rate of 10 MB / sec or more cannot be recorded.

  Further, since image data recorded on the memory card drive cannot be uploaded to the PC at high speed, the upload time to the PC becomes slow in proportion to the increase in capacity.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a camera recorder capable of high-speed recording and reproduction of large-capacity image data and a data recording medium used for the camera recorder.

  In order to solve this problem, a first camera recorder according to the present invention is a camera recorder including a camera unit and a recording unit that records image data captured by the camera unit, wherein the recording unit Comprises an interface unit for inputting image data from the camera unit, a plurality of memory cards for recording the image data, and a control unit for controlling writing of image data to the memory card, wherein the memory card is a flash memory. A control unit configured to block image data input from the camera unit through the interface unit into blocks each having a data size that is an integral multiple of a recording block of the flash memory, and to be connected to the plurality of memory cards in parallel. It is characterized in that it is recorded in.

  Further, a second camera recorder according to the present invention is a camera recorder including a camera unit and a recording unit that records image data captured by the camera unit, wherein the recording unit is provided from the camera unit. An interface unit for inputting image data, a plurality of memory cards for recording the image data, and a control unit for controlling reading of image data from the memory card, wherein the memory card is configured by a flash memory, The control unit is configured to read, in parallel, from the plurality of memory cards, image data blocked into blocks each having a data size that is an integral multiple of a recording block of the flash memory.

  Further, a data recording medium according to the present invention includes an interface unit for inputting image data, a plurality of memory cards for recording the image data, and a control unit for controlling writing of image data to the memory card, The memory card is constituted by a flash memory, and the control unit divides the image data input via the interface unit into blocks each having a data size that is an integral multiple of a recording block of the flash memory, and controls the plurality of memory cards in parallel. It is characterized in that it is recorded in.

  According to the present invention, it is possible to provide a camera recorder capable of high-speed recording and reproduction of large-capacity image data, and a data recording medium capable of transferring image data to an information processing device such as a personal computer at a high speed.

  According to the first camera recorder of the present invention, a recording rate proportional to the number of memory cards to which image data is written in parallel can be realized, so that high-speed recording of image data is possible.

  In the first camera recorder, the image data input from the camera unit via the interface unit is divided into blocks each having a data size that is an integral multiple of a recording block of the flash memory, and the blocks are written in parallel to the plurality of memory cards. This can prevent an increase in the number of rewrites.

  In the first camera recorder, image data input from the camera unit via the interface unit is divided into blocks each having a data size that is an integral multiple of an erase block in the flash memory, and the blocks are written in parallel to the plurality of memory cards. This prevents an increase in the number of erasures caused by using a plurality of memory cards, and enables high-speed recording.

  Further, in the first camera recorder, the data transfer from the camera unit to the interface unit is performed by a block of an integral multiple of (the data size of the erase block of the flash memory) * (the number of memory cards forming the recording unit). It is also preferable that the control is performed in units of size, and that the control unit performs recording in the plurality of memory cards in units of recording blocks of a flash memory. This is because small blocks can be transferred at high speed during reading.

  Further, in the first camera recorder, it is preferable that the control unit strips and records the blocked image data on the plurality of memory cards.

  Further, in the first camera recorder, it is preferable that the recording section is provided with a plurality of units. This is because image data can be recorded for a longer time.

  In the first camera recorder, it is preferable that the recording unit is detachable. Furthermore, an aspect in which the recording unit is in the form of a card or a stick compatible with an external information processing device is also preferable. This is because the image data can be edited by an information processing device such as a personal computer.

  Further, according to the second camera recorder of the present invention, the control unit reads out, in parallel, the image data blocked by the data size of an integral multiple of the recording block of the flash memory from the plurality of memory cards. Thus, it is possible to reproduce a video signal requiring a high-speed rate.

  Further, in the second camera recorder, it is preferable that the recording unit is provided with a plurality of units. This is because image data can be reproduced for a longer time. In the second camera recorder, it is preferable that the recording unit is detachable. Furthermore, an aspect in which the recording unit is in the form of a card or a stick compatible with an external information processing device is also preferable. This is because the image data can be edited by an information processing device such as a personal computer.

  Further, according to the data recording medium of the present invention, the control unit blocks the image data input via the interface unit into a data size that is an integral multiple of a recording block of the flash memory, and By recording in parallel on the card, a recording rate proportional to the number of memory cards to which image data is written in parallel can be realized, so that high-speed recording of image data becomes possible.

  Further, in the data recording medium of the present invention, the image data input via the interface unit may be divided into blocks each having a data size that is an integral multiple of the erase block of the flash memory and written in parallel to the plurality of memory cards. In addition, it is possible to prevent the number of erasures from increasing due to the use of a plurality of memory cards, thereby enabling high speed recording.

  Further, in the data recording medium of the present invention, the data input in the interface unit is performed in a block size unit of an integral multiple of (data size of the erase block of the flash memory) * (number of memory cards constituting the recording unit). It is preferable that the control unit performs the recording on the plurality of memory cards in units of recording blocks of the flash memory. This is because small blocks can be transferred at high speed during reading.

  Further, in the data recording medium of the present invention, it is also preferable that the control unit strips and records the block image data on the plurality of memory cards. Further, the data recording medium of the present invention is also preferably in the form of a card or a stick having compatibility between a plurality of types of information processing devices. This is because, for example, after recording image data taken by attaching to a camera recorder, the image data can be edited by an information processing device such as a personal computer.

  Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration of a camera recorder according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a camera unit, and 2 denotes a recording unit that records image data transferred from the camera unit. The camera unit 1 includes an imaging unit 10 and a signal processing unit 11 that digitizes a video signal from the imaging unit 10 and blocks the image signal in units of 64 KB. The recording unit 2 includes an interface unit 3 serving as an interface for inputting image data from the camera unit 1, four memory cards 50, 51, 52, and 53, and digital data stored in these four memory cards 50 to 53. And a control unit 4 for transmitting the signals in parallel. The memory cards 50 to 53 have memory card numbers such as memory card # 0, memory card # 1, memory card # 2, and memory card # 3. The recording capacity of each of the memory cards 50 to 53 is 512 MB, and the recording rate when continuously transferring 16 KB blocks is 4 MB / sec.

  The operation of the camera recorder having the above configuration will be described in detail from the recording operation.

  The video signal imaged by the imaging unit 10 is input to the signal processing unit 11. The signal processing unit 11 performs data compression on the input video signal, and blocks and outputs the video signal every 64 KB. For example, when the camera recorder complies with the DVCPRO50 standard, the signal input unit 11 compresses image data of about 25 MB / sec to a rate of 9 MB / sec.

  The image data block-formed in units of 64 KB by the signal processing unit 11 is input to the control unit 4 via the interface unit 3. The control unit 4 records the image data input from the interface unit 3 in parallel on the four memory cards 50 to 53 in units of 16 KB blocks.

  When 16 KB data is continuously recorded, the recording rate of the memory cards 50 to 53 is 4 MB / sec, and the data is simultaneously recorded on the four memory cards 50 to 53 in units of 16 KB. The maximum allowable transfer rate of the image data is 16 MB / sec. Therefore, a recording rate four times that of one memory card can be obtained.

  Next, the operation of the memory cards 50 to 53 will be described. First, the recording operation of a general memory card will be described.

  Generally, a flash memory built in a memory card is composed of a plurality of erase blocks, and when erasing data, an erase operation is performed for each erase block. An erase block includes a plurality of recording blocks, and an erased erase block can be written (written) in recording block units.

  For example, in a flash memory in which two 512-byte recording blocks constitute an erase block, data written once in two record blocks constituting an erase block is rewritten only in one of the record blocks. The algorithm will be described with reference to FIGS.

  In FIG. 6A, reference numerals 61 and 62 denote erase blocks. The erasing block 61 is composed of two recording blocks 61a and 61b, and the erasing block 62 is composed of two recording blocks 62a and 62b. In FIG. 6A, it is assumed that data A and B have been written in the erase block 61 and the erase block 62 has been erased.

  When rewriting only data B in the flash memory in the state of FIG. 6A, the following procedure is performed. First, data B (NEW) to be rewritten is written in the erased erase block 62 (see FIG. 6B). Next, the data A written in the erase block 61 is moved to the erase block 62 (see FIG. 6C). Then, the erase block 61 is erased (see FIG. 6D).

  A series of these operations is called entrainment evacuation. When the entanglement and retraction occurs, writing occurs twice, so that the writing rate decreases. Further, since the physical position where the data is recorded is updated, it is necessary to update the correlation table between the logical address and the physical address every time the entanglement occurs, in addition to the above operation.

  Here, FIG. 7 shows a conceptual diagram of a memory card used in the present embodiment.

  As shown in FIG. 7 (only the memory card 50 is illustrated in FIG. 7), one erase block 71 is composed of 32 recording blocks 72 as shown in FIG. ing. The size of each recording block 72 is 512 B, and the size of the erase block 71 is 16 KB.

  For example, if serial numbers are added to the recording block 72 as # 0, # 1, # 2,..., The recording blocks # 0 to # 31 become one erase block.

  Assuming that a serial number is also added to the erase block 71, the serial number R (n) of the recording block 72 and the serial number E (n) of the erase block 71 have the following relationship.

E (n) = R (n) / 32
Since the erase block 71 is composed of a plurality of recording blocks 72, for example, when it is intended to overwrite 16 KB data on a continuous recording block, (1) 16 KB data is recorded in one erase block. (Eg, recording blocks # 0 to # 31), and (2) when 16 KB data is recorded over two erase blocks (eg, recording blocks # 1 to # 32), two types of patterns occur. I do.

  In the case of the pattern (1), the printing operation is performed by the following three steps (a1) to (a3).

(A1) Detection of an unrecorded erase block,
(A2) 16 KB of data to be updated is recorded in the erase block detected by the above (a1).
(A3) Deletion of data before update.

  On the other hand, in the case of the pattern (2), the recording operation is performed by the following eight steps (b1) to (b8).

(B1) detection of an unrecorded erase block,
(B2) The corresponding data is recorded in the recording blocks # 1 to # 31 of the erase block detected by the above (b1).
(B3) The data corresponding to the recording block # 0 is saved in the erase block detected by the above (b1).
(B4) erase the erase block in which the recording blocks # 0 to # 31 before the update have been recorded,
(B5) detection of an unrecorded erase block,
(B6) data corresponding to the recording block # 32 is recorded in the erase block detected by the above (b5);
(B7) Save the data corresponding to the recording blocks # 33 to # 63 in the erase block detected by the above (b5).
(B8) The erase block in which the record blocks # 32 to # 63 before the update are recorded is erased.

  As described above, when updating data, it is important to perform recording in consideration of the alignment of erase blocks of the memory card in order to exhibit the transfer performance of the memory card.

  Therefore, in the present embodiment, data is transferred from the camera unit 1 to the recording unit 2 in units of 64 KB, and the recording unit 2 divides and records 64 KB data into 16 KB corresponding to an erase block of each memory card.

  FIG. 2 is a block diagram showing an example of the internal configuration of the recording unit 2 in FIG. In FIG. 2, the description of the blocks denoted by the same reference numerals as in FIG. 1 is omitted. 2, reference numeral 40 denotes a buffer memory for temporarily storing digital data transferred from the interface unit 3, and 41 denotes a memory control unit for controlling the buffer memory 40. The memory control unit 40 converts digital data input in series at a transfer rate of, for example, 16 MB / sec into four digital data strings having a transfer rate of 4 MB / sec. Reference numeral 42 denotes an address conversion unit which converts a sector number of a sector for which recording / reproduction is instructed via the interface unit 3 into a memory card number assigned to each of the four memory cards 50 to 53 and an address inside the memory card. . Reference numeral 43 denotes a memory card control unit that controls the four memory cards 50 to 53 according to the internal logical sector numbers output by the address conversion unit 42.

  The operation of the recording unit 2 having the above configuration will be described in more detail.

  In the present embodiment, an interface conforming to a PC card is used for the interface unit 3. A command set and digital data conforming to the ATA standard are transferred from the camera unit 1 to the interface unit 3. Generally, digital data is transferred between a recording device and a host in units of an integral multiple of a sector having 512 bytes as a unit block. In this embodiment, 32 * 4 sectors are packed into one, and digital data is transferred in units of 64 KB (512B * 32 * 4). A block in which a plurality of sectors are collected is called a cluster, and a file system (for example, FAT) manages files in cluster units. In the present embodiment, file management is performed in units of 16 KB clusters, and data transfer is performed in units of 4 clusters (64 KB).

  FIG. 3 shows the timing of the input / output cluster of the control unit 4 in the present embodiment.

  FIG. 3A is a timing chart of a cluster transferred to the interface unit 3, and the reference numeral is a cluster number. The number of bytes transferred per cluster is 16 Kbytes, and every four bytes are transferred in synchronization with a 66 MHz clock.

  Since the transfer rate is 9 MB / sec in the DVCPRO50 standard, the occupation rate of the transfer data is 9 / (66 * 4). In the present embodiment, in the signal processing unit 10 of the camera unit 1, data is buffered in a memory (not shown) and then transferred to the recording unit 2 continuously in units of four clusters (16 KB * 4).

  3B is a timing chart of a cluster transferred to the memory card 0, FIG. 3C is a timing chart of a cluster transferred to the memory card 1, and FIG. The timing chart of the cluster to be transferred, and (e) of the same figure is a timing chart of the cluster transferred to the memory card 3, and the symbols described in (b), (c), (d), and (e) are ( This corresponds to the cluster number described in a).

  Each cluster transferred to the interface unit 3 at a rate of 66 MHz per 2 bytes at the timing shown in FIG. 3A is transferred to the buffer memory 40 of the control unit 4, and is read out by the memory control unit 41 in units of sectors. As shown in (b), (c), (d), and (e) of FIG. 3, the data is interleaved and transferred to the memory card control unit 43.

  The address conversion unit 42 converts the cluster number specified via the interface unit 3 into the memory card numbers of the memory cards 50 to 53 and the internal cluster numbers of the respective memory cards.

FIG. 4 is a cluster number conversion table used by the address conversion unit 42. The remainder obtained by dividing the cluster number transferred to the interface unit 3 (the transfer cluster number in FIG. 4) by 4 becomes the memory card number. That is,
Memory card number = transfer cluster number% 4
Can be expressed as “%” Is a remainder operation symbol.

The integer part of the quotient obtained by dividing the transfer cluster number by 4 becomes the cluster number of the memory card. That is,
Cluster number of memory card = transfer cluster number / 4
Can be expressed as Here, “/” is an operation symbol for finding an integer part of a quotient.

  The memory card control unit 7 transfers the clusters parallelized by the buffer memory 40 as described above to the four memory cards 50 to 53 according to the cluster numbers converted by the address conversion unit 42. Record on each memory card in parallel.

  As described above, the data transferred from the camera unit 1 is divided in units of erasure blocks of the memory cards 50 to 53, and the data is recorded in parallel in the memory cards 50 to 53, so that the transfer performance of the memory card with a recording rate of 4 MB / sec. 4 can be operated in parallel without deteriorating the maximum recording rate of 16 MB / sec.

  In the above, an example has been described in which the data transferred via the interface unit 3 is divided in units of erase blocks and recorded on each memory card. Hereinafter, as a modification of the present embodiment, the data is divided in units of recording blocks. An example in which is divided and recorded will be described.

  FIG. 8 is an explanatory diagram of a modification of the present embodiment. As shown in FIG. 8, in this example, the data transferred via the interface unit 3 is divided into recording blocks of the flash memory and recorded on each memory card.

  That is, the data transferred via the interface unit 3 is striped to each memory card for each recording block (512B) of the flash memory. The image data is transferred from the camera unit 1 to the recording unit 2 in block units (64 KB) having a size four times the size of the erase block.

  In this example, since the erase block of each flash memory and the data block transferred from the camera unit 1 match, the data transferred from the camera unit 1 is recorded at high speed without saving as a result. It is possible.

  In this example, not only high-speed recording is possible, but also at the time of reading, a memory card can be read in parallel from a unit four times as large as a recording block, so that relatively small-block data can be read at high speed. .

  When dividing into four memory cards for each unit (for example, 128B) smaller than the recording block (512B), four recording blocks are rewritten in data recording of 512B. Therefore, the number of times of rewriting increases four times as compared with the case where the memory card is divided into four memory cards in units of 512B, and it is obvious that the flash memory having the limitation of the number of times of rewriting is disadvantageous.

  Further, when a plurality of flash memories are built in a memory card and N (N is an integer of 2 or more) flash memories are operated in parallel in the memory card, the number of erase blocks in the flash memory is N times larger. It goes without saying that high-speed recording becomes possible by performing the recording operation in block units.

  In the reproducing operation of the present embodiment, the data flow is the reverse of the recording operation.

  First, a read cluster number is input to the interface unit 3. The read cluster number is converted by an address conversion unit 42 into a memory card number to be read and a cluster number of the memory card. The memory card control unit 43 reads digital data of the cluster from a predetermined memory card according to the memory card number and the cluster number of the memory card. Digital data read from the memory card is temporarily stored in the buffer memory 40 and then output via the interface unit 3.

  Since the cluster number input to the interface unit 3 is input in the form of the leading cluster number to be read and the number of clusters to be read consecutively, the memory card control unit 43 determines the cluster from the four memory cards in parallel. Since the data can be read and transferred to the buffer memory 40, the reading can be speeded up.

  The read cluster is input to the signal processing unit 11 of the camera unit 1. The signal processing unit 11 decompresses the compressed data into a video signal and outputs it to a monitor or the like.

  The reproducing operation may be performed by a camera recorder. However, if the recording unit 2 is mounted in the form of a PC card, the recording unit 2 can be removed from the camera recorder and inserted into a personal computer to reproduce a captured video signal. .

  If the recording unit 2 is implemented as a PC card in this manner, a mobile personal computer and a camera recorder are carried, and a picture is taken in the field. The PC card-shaped recording unit 2 is removed from the camera recorder and inserted into the mobile personal computer. Then, a new workflow of the broadcast station can be provided in which the captured image data is edited by the mobile personal computer and then transmitted to the broadcast center via communication means such as the Internet.

  It is needless to say that the transfer rate to the PC does not need to be the same as the recording rate of the video signal, and that uploading is performed at the highest speed.

  Further, since the PC card-shaped recording unit 2 does not have a mechanically movable structure, it is much more resistant to shocks than an HDD as an external recording medium of a PC and can be effectively used as a mobile disk. The recording unit 2 may have a stick shape other than the card shape.

  FIG. 5 shows a conceptual diagram of a camera recorder in which the recording unit 2 is configured in a PC card shape and a plurality of recording media are inserted. As shown in FIG. 5, if the camera recorder has a configuration in which a plurality of recording units 2 can be inserted, recording of a video signal for a longer time can be realized.

  Further, if two recording units 2 are mounted on the camera recorder, unlimited continuous recording of video signals becomes possible by exchanging the recording units that are not operating.

  In the present embodiment, an example in which four memory cards are provided has been described. However, the present invention is not limited to this, and N (N is a natural number) memory cards and the corresponding memory card numbers It is also possible to control N memory cards according to the internal logical sector numbers by the address conversion unit.

  As described above, by configuring the camera recorder with the recording unit and the camera unit that operate a plurality of memory cards in parallel, it is possible to record and reproduce a high-rate video signal.

  In addition, the recording unit is divided into blocks in predetermined units according to the characteristics of the memory card constituting the recording unit, and the blocks are recorded in association with the respective memory cards. By performing such control, the transfer performance can be improved.

  Further, by dividing the block into N times (N is a natural number) the recording block of the flash memory and recording the block in association with each memory card, it is possible to prevent an increase in the number of times of rewriting.

  Further, by dividing the flash memory into blocks N times (N is a natural number) and recording the blocks in association with the respective memory cards, an increase in the number of erasures due to the use of a plurality of memory cards is prevented. As a result, high-speed recording becomes possible.

  In addition, the memory card is associated with each memory card in units of recording blocks of the flash memory, and the interface number is N times (N is a natural number) times (the erase block of the flash memory) * (the number of memory cards constituting the recording unit). By transferring and recording the data via the unit, it becomes possible to transfer small blocks at high speed during reading.

  INDUSTRIAL APPLICABILITY The present invention is useful as a camera recorder capable of high-speed recording and reproduction of a large amount of image data, and a data recording medium capable of transferring image data to an information processing device such as a personal computer at a high speed.

FIG. 1 is a configuration diagram of a camera recorder according to an embodiment of the present invention. Detailed configuration diagram of the recording unit in FIG. Timing diagram of input / output data of control unit Explanatory drawing of an example of the conversion table of the address conversion unit Conceptual diagram of camera recorder with multiple recording units Illustration of write operation of memory card A conceptual diagram showing a configuration example of a memory card according to an embodiment of the present invention. FIG. 7 is a conceptual diagram showing another example of a data recording procedure according to an embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Camera part 2 Recording part 3 Interface part 4 Control part 5 Imaging part 6 Signal processing part 50-53 Memory card

Claims (16)

A camera recorder comprising a camera unit and a recording unit for recording image data captured by the camera unit,
The recording unit,
An interface unit for inputting image data from the camera unit;
A plurality of memory cards for recording the image data,
A control unit that controls writing of image data to the memory card,
The memory card is configured by a flash memory,
The control unit may block the image data input from the camera unit via the interface unit into a block having a data size that is an integral multiple of a recording block of the flash memory, and record the data in parallel on the plurality of memory cards. Characteristic camera recorder. The control unit blocks the image data input from the camera unit via the interface unit into a block having a data size that is an integral multiple of an erase block of the flash memory, and associates the block with each memory card. The camera recorder of claim 1 for recording. 3. The camera recorder according to claim 1, wherein the control unit strips and records the blocked image data on the plurality of memory cards. 4. Data transfer from the camera unit to the interface unit is performed in a block size unit that is an integral multiple of (data size of the erase block of the flash memory) * (number of memory cards forming the recording unit),
4. The camera recorder according to claim 1, wherein the control unit performs recording on the plurality of memory cards in units of recording blocks of a flash memory. 5. The camera recorder according to claim 1, comprising a plurality of the recording units. The camera recorder according to claim 1, wherein the recording unit is detachable. The camera recorder according to claim 6, wherein the recording unit is a card or a stick having compatibility with an external information processing device. A camera recorder comprising a camera unit and a recording unit for recording image data captured by the camera unit,
The recording unit,
An interface unit for inputting image data from the camera unit;
A plurality of memory cards for recording the image data,
A control unit that controls reading of image data from the memory card,
The memory card is configured by a flash memory,
A camera recorder, wherein the control unit reads, from the plurality of memory cards, image data blocked in a data size that is an integral multiple of a recording block of the flash memory in parallel. 9. The camera recorder according to claim 8, comprising a plurality of said recording units. The camera recorder according to claim 8, wherein the recording unit is detachable. The camera recorder according to claim 10, wherein the recording unit has a card or stick shape compatible with an external information processing device. An interface for inputting image data,
A plurality of memory cards for recording the image data,
A control unit that controls writing of image data to the memory card,
The memory card is configured by a flash memory,
The control unit, wherein the image data input via the interface unit is divided into blocks each having a data size of an integral multiple of a recording block of the flash memory, and is recorded in parallel on the plurality of memory cards. recoding media. The control unit, the image data input via the interface unit is divided into blocks with a data size of an integral multiple of an erase block of the flash memory, and the blocks are recorded in association with each memory card. Item 13. The data recording medium according to Item 12. 14. The data recording medium according to claim 12, wherein the control unit strips and records the blocked image data on the plurality of memory cards. The interface unit inputs image data in data block units that are integral multiples of (the data size of the erase block of the flash memory) * (the number of memory cards forming the recording unit),
15. The data recording medium according to claim 12, wherein the control unit performs recording on the plurality of memory cards in units of recording blocks of a flash memory. The data recording medium according to any one of claims 12 to 15, wherein the data recording medium is a card or a stick having compatibility between a plurality of types of information processing devices.

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