JP2010198470A - Information processor and imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accelerate an access speed to the recording medium of a first speed when the recording medium of the first speed and the recording medium of a second speed faster than the first speed are respectively mounted. <P>SOLUTION: The information processor includes: a first recording medium mounting means on which a first recording medium is mounted, wherein a data transfer speed is the first speed; a second recording medium mounting means on which a second recording medium of the second speed is mounted, wherein a data transfer speed is faster than that of the first speed; and a control means which respectively accesses the second recording medium mounted on the second recording medium mounting means and the first recording medium mounted on the first recording medium mounting means. In the information processor, at least a portion of information recorded in the first recording medium mounted on the first recording medium mounting means is preliminarily recorded in the second recording medium mounted on the second recording medium mounting means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an information processing apparatus and an imaging apparatus.

  In a digital camera, as a method for speeding up reading of an image file recorded on a recording medium detachably mounted in a camera slot (recording medium mounting unit) and incidental information related to the image file, the image is stored in the recording medium. There is known a technique in which image data and information related to the image data are cached using an internal memory such as a DRAM that can be accessed at high speed (see Patent Document 1 below).

  However, due to the demand for an increase in the number of recording sheets and the demand for higher image quality, the increase in capacity of memory cards as recording media has progressed, and the number of recorded image files has become enormous. Regardless, as the internal memory used as a cache, it is difficult to use a large-capacity memory because of the demand for lower prices. For this reason, when a predetermined number of files or more are cached, it is necessary to read the files directly from the recording medium as described in the same document. In this case, the access speed should be increased. I can't.

  Recently, there has been known a so-called dual slot digital camera capable of simultaneously loading a plurality of recording media having different data transfer speeds (recording speeds), capacities, and the like (see Patent Document 2 below). In this technology, the recording medium to be recorded is automatically selected according to the file size and the image quality mode (high image quality, low image quality, etc.). In such a dual slot digital camera, when a low-speed recording medium and a high-speed recording medium are respectively mounted, it is desired to increase the access speed to the low-speed recording medium.

  The present invention has been made in view of these points, and the object of the present invention is when a first-speed recording medium and a second-speed recording medium faster than the first speed are respectively mounted. Another object of the present invention is to provide an information processing apparatus and an imaging apparatus capable of increasing the access speed to the first speed recording medium.

JP 2006-121506 A JP 2004-229172 A

An information processing apparatus according to claim 1 is provided.
A first recording medium mounting means capable of mounting a first recording medium having a data transfer speed of a first speed;
A second recording medium mounting means capable of mounting a second recording medium having a second data transfer speed higher than the first speed;
The second recording medium mounted on the second recording medium mounting means, and the control means for accessing the first recording medium mounted on the first recording medium mounting means,
Recording in advance at least a part of the information recorded on the first recording medium mounted on the first recording medium mounting means on the second recording medium mounted on the second recording medium mounting means. Features.

The information processing device according to claim 2 is the information processing device according to claim 1,
The control means records area management information related to an arrangement of files recorded on the first recording medium on the second recording medium, and based on the area management information recorded on the second recording medium, A file recorded on one recording medium is accessed.

The information processing device according to claim 3 is the information processing device according to claim 1 or 2,
The control means records, on the second recording medium, file management information based on at least one of directory information for managing the file recorded on the first recording medium and incidental information on the file. Search information of a file recorded on the first recording medium is acquired using the recorded file management information.

The information processing device according to claim 4 is the information processing device according to any one of claims 1 to 3,
The control means records at least a part of the plurality of files recorded on the first recording medium on the second recording medium, and the file to be accessed is also recorded on the second recording medium. If it is, the file recorded on the second recording medium is accessed.

The information processing device according to claim 5 is the information processing device according to any one of claims 1 to 4,
The control means includes storage means having a data transfer speed higher than the second speed as a temporary storage when accessing the first recording medium or the second recording medium.

The imaging device according to claim 6 is:
An image sensor for capturing an image of a subject;
The information processing apparatus according to any one of claims 1 to 5 is provided.

  According to the present invention, when a recording medium having a first speed and a recording medium having a second speed higher than the first speed are mounted, the access speed for the recording medium having the first speed can be increased. There is.

It is a block diagram which shows schematic structure of a digital camera provided with the information processing apparatus of embodiment of this invention. It is a flowchart which shows the initial process of the memory card in the 1st speed-up process of embodiment of this invention. It is a flowchart which shows the search process of a free cluster when recording the image file in the 1st speed-up process of embodiment of this invention. It is a flowchart which shows a FAT search process when opening the image file in the 1st speed-up process of embodiment of this invention. It is a figure which shows an example of a structure of the file management information in the 2nd speed-up process of embodiment of this invention. It is a figure which shows the structure of the cache file set in the high-speed memory card in the 2nd speed-up process of embodiment of this invention. It is a flowchart which shows the cache search process in the 2nd speed-up process of embodiment of this invention. It is a figure which shows the structure of the cache file set in the high-speed memory card in the 3rd high-speed process of embodiment of this invention. It is a flowchart which shows the reading process of the image file in the 3rd speed-up process of embodiment of this invention. It is a flowchart which shows the write-in process of the image file in the 3rd speed-up process of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Schematic configuration of the camera]
FIG. 1 is a block diagram showing a schematic configuration of a digital camera including an information processing apparatus according to an embodiment of the present invention. The digital camera of this embodiment is a single-lens reflex electronic camera including an optical viewfinder. However, the imaging apparatus to which the present invention is applicable is not limited to a single-lens reflex digital camera, and may be a compact digital camera, other digital cameras, or a digital video camera. The present invention is not limited to a device generally called a camera, but can be applied to an electronic device having an imaging function such as a mobile phone or a PDA. Furthermore, the present invention is not limited to an electronic apparatus having an imaging function, and can also be applied to an electronic apparatus that uses a recording medium capable of recording still images, moving images, music, audio, and the like as an external storage device.

  As shown in FIG. 1, the camera 1 includes a camera body 2 and a photographing lens 3 as an optical system. Here, the photographing lens 3 may be fixed to the camera body 2 or may be interchangeable. A main CPU 10 is provided in the camera body 2, and the main CPU 10 includes a ROM 11 and a RAM 12. The main CPU 10 is a control means for comprehensively controlling the entire camera 1, and performs predetermined calculations based on control programs, application programs (such as photographing processing programs) stored in the ROM 11, various control data, etc. Processing such as outputting a control signal based on the result to each block is performed.

  The RAM 12 is a high-speed internal memory composed of a DRAM or the like, and its storage area is used as a work area or a buffer area for temporarily storing data when the main CPU 10 performs various processes. A part of the RAM 12 is also used as a cache area (storage means) as temporary storage for increasing the access speed between an external recording medium (29, 30) described later and the main CPU 10. The information transfer speed of the RAM 12 is naturally higher than the information transfer speed of an external recording medium (29, 30) described later.

  Further, the camera body 2 is provided with a sub CPU 13, and the sub CPU 13 includes a ROM 14 and a RAM 15. The sub CPU 13 is a control means for assisting the main CPU 10, and performs a predetermined calculation based on a control program stored in the ROM 14, various control data, etc., and outputs a control signal based on the calculation result to each block under management. Perform processing such as. The RAM 15 is a high-speed internal memory composed of a DRAM or the like, and its storage area is used as a work area when the sub CPU 13 performs various processes.

  An image sensor 17 is connected to the main CPU 10 via a sensor driving unit 16. The image sensor 17 is constituted by a CCD (or CMOS or the like), receives and captures light from the subject via the photographing lens 3, and outputs an image signal (analog signal as accumulated charge). The imaging signal output from the imaging element 17 is input to the imaging signal processing unit 18. The imaging signal processing unit 18 includes an A / D conversion unit that performs A / D conversion on an analog signal from the imaging element 17, an image processing unit that performs image processing on the A / D converted digital signal, and the like. The image processing unit is configured by ASIC (Application Specific Integrated Circuit) or the like, and performs image processing such as white balance (WB) adjustment, contour compensation, and gamma correction on the original image data which is a digital signal, and predetermined compression. A compression process for compressing in a format (for example, JPEG) or a decompression process for compressed image data is performed.

  The photometric device 19 is a device that measures the brightness of the image formed by the photographing lens 3 in order to determine the shutter speed and the aperture value. The sequence device 20 charges or opens a quick return mirror (not shown) for selectively guiding the light from the subject through the photographing lens 3 to the image sensor 17 or the optical viewfinder, and is arranged in the vicinity of the imaging surface of the image sensor 17. This is a device for charging or opening a mechanical shutter (not shown). The flash device 21 is a device that emits a flash to illuminate a subject.

  The main CPU 10 and the sub CPU 13 are supplied with power from a power source 22 such as a battery pack via a power control unit 23. As the power source 22, a commercial power source supplied via an adapter cable (not shown) can be used.

  An external display device 25 is connected to the main CPU 10 via an external display device control unit 24. The external display device 25 is provided on the back surface of the camera body 2 and is composed of a liquid crystal panel such as a TFT (Thin Film Transistor) method. On the external display device 25, an image sent from the imaging signal processing unit 18, an image read from a buffer memory (RAM 12) or a memory card (29, 30) to be described later, information related to photographing, and the like are displayed. In the live view display mode, the image being captured by the image sensor 17 is displayed on the external display device 25 in real time as a through image. Here, the through image is a frame rate at which a predetermined thinning process is performed on the original image due to the relationship between the resolution of the image sensor 17 and the resolution of the external display device 25 and the like, so that it can be visually recognized as a moving image. It is an image displayed by.

  A card slot (slot A) 27 and a card slot (slot B) 28 as recording medium mounting means are connected to the main CPU 10 via a memory card controller 26. In the card slots 27 and 28, memory cards 29 and 30 as external recording media are detachably mounted. The memory cards 29 and 30 are portable information recording media composed of a flash memory or the like. For example, an SD card or the like is used. The memory cards 29 and 30 can record image data (still images and moving images) subjected to compression processing as image files together with predetermined auxiliary information.

  In this embodiment, the card slot 27 is a low-speed card mounting slot (low-speed medium mounting means) in which only a low-speed card (low-speed recording medium) can be mounted, and the card slot 27 has a relatively low data transfer speed (30 MB). It is assumed that a memory card 29 as a low-speed card is installed. The card slot 28 is a high-speed card mounting slot (high-speed medium mounting means) in which only a high-speed card (high-speed recording medium) can be mounted, and the card slot 28 has a relatively high data transfer speed (about 100 MB / sec). It is assumed that a memory card 30 as a high-speed card is mounted.

  Here, the card slot 27 is a low-speed card mounting slot in which only a low-speed card can be mounted. However, the card slot 27 may be a high-speed card mounting slot on the condition that it has backward compatibility (a low-speed card can also be mounted). . Further, although the card slot 28 is a high-speed card mounting slot in which only a high-speed card can be mounted, it may be a high-speed card mounting slot having backward compatibility. Further, here, it is assumed that the card slots 27 and 28 are configured so that the user can arbitrarily replace the memory card attached to the card slot 27, but the memory card is attached to one or both of them. As a state, it may be configured to prohibit replacement by a user.

  Whether or not the memory cards 29 and 30 are mounted in the card slots 27 and 28 is detected by the memory card detection unit 31 connected to the sub CPU 13. When a high-speed card mounting slot having backward compatibility is used as the card slots 27 and 28, the memory card detection unit 31 uses a low-speed card as the card mounted in the card slots 27 and 28. Whether it is a high-speed card or not is also detected.

  An operation member 32 is connected to the sub CPU 13. The operation member 32 includes a release SW (switch) 33 capable of switching between half-press and full-press, a power SW (switch) 34 for turning on / off the main power, a command button, a menu button, and an item selection button (or 4) and various setting buttons 35 such as an OK button (decision button). The user operates these switches and buttons in accordance with a predetermined procedure to select various modes in addition to shooting instructions. And switching of settings, selection and input of parameters, and other instructions accompanying shooting.

  When the user presses the release SW 33 of the operation member 32, the image data related to the captured image from the image sensor 17 is subjected to image processing (correction, compression, etc.) by the imaging signal processing unit 18. The main CPU 10 adds predetermined auxiliary information to the image data after the image processing, and creates memory cards 29, 30 with predetermined file names having serial numbers that are sequentially incremented as image files in a format such as exif. To one of the presets. Here, the supplementary information is information relating to photographing that is attached to the image data. The supplementary information includes photographing time information (year / month / day / hour / minute / second) from a clock unit (not shown) included in the main CPU 10. In the case of having a GPS unit, shooting location information (GPS information such as longitude and latitude, altitude, etc.), information indicating whether or not shooting was performed in continuous shooting mode, information indicating whether or not shooting was performed in bracketing shooting mode, exposure information , Shutter speed, shooting mode information (information for identifying a sport mode, portrait mode, studio mode, etc.), information indicating whether or not the image has been shot by the face recognition function, and the like are included as necessary.

[First acceleration processing]
This first high-speed processing is performed by area management information (FAT: File Allocation Table) related to the arrangement (recording position in the medium) of an image file recorded on a memory card (hereinafter also referred to as a low-speed memory card) 29 as a low-speed recording medium. ) Is recorded (copied) in a memory card (hereinafter also referred to as a high-speed memory card) 30 as a high-speed recording medium, and the image file in the low-speed memory card 29 is based on the area management information recorded in the high-speed memory card 30. It is a process to access (read, write). Normally, access to the image file in the low-speed memory card 29 is performed based on the area management information in the low-speed memory card 29, so that the recording position reading speed of the image file to be accessed in the low-speed memory card 29 is read. Depends on the data transfer speed of the low-speed memory card 29. On the other hand, in this embodiment, by accessing the low speed memory card 29 via the area management information related to the low speed memory card 29 recorded on the high speed memory card 30, the image file in the memory card 29 to be accessed is stored. Since the recording position can be read out at high speed, the access speed can be increased accordingly. This will be specifically described below.

  FIG. 2 is a flowchart showing an initial process of the memory card according to the embodiment of the present invention. This process is started when the power switch 34 of the camera 1 is turned on with the low-speed memory card 29 inserted (attached) in the card slot 27 (or when the low-speed memory card 29 is inserted in the card slot 27). The When it is detected that the low-speed memory card 29 is inserted into the card slot 27 (step S11), it is determined whether or not the high-speed memory card 30 is inserted into the card slot 28 (step S12). If it is determined in step S12 that the high-speed memory card 30 is inserted in the card slot 28 (in the case of Y), a FAT cache file is created in the high-speed memory card 30 (step S13), and the low-speed memory All FAT (area management information) in the card 29 is copied to the high-speed memory card 30 (step S14). Next, the low-speed memory card 29 is mounted (step S15), and this process ends. If it is determined in step S12 that the high speed memory card 30 is not inserted into the card slot 28 (in the case of N), steps S13 and S14 are skipped, and the low speed memory card 29 is mounted in step S15. This process is terminated.

  FIG. 3 is a flowchart showing a free cluster search process when an image file is recorded according to the embodiment of the present invention. This process is started when a request for recording (writing) an image file to the low-speed memory card 29 occurs in an application (such as a shooting process program) by the main CPU 10. First, when a request for recording an image file to the low-speed memory card 29 is generated (step S21), it is determined whether or not the high-speed memory card 30 is inserted in the card slot 28 (step S22). If it is determined in step S22 that the high-speed memory card 30 is inserted in the card slot 28 (in the case of Y), the FAT (FAT cache) related to the low-speed memory card 29 cached in the high-speed memory card 30 is stored. Search is performed (step S23).

  Next, it is determined whether or not there is an empty cluster in the low speed memory card 29 (step S24). If it is determined in step S24 that there is an empty cluster (in the case of Y), the FAT cache of the high speed memory card 30 is updated (step S25), and the FAT of the low speed memory card 29 is further updated (step S26). This process is terminated. If it is determined in step S22 that the high-speed memory card 30 is not inserted in the card slot 28 (N), the FAT in the low-speed memory card 29 is searched (step S27). Next, it is determined whether there is an empty cluster in the low-speed memory card 29 (step S28). If it is determined that there is an empty cluster (in the case of Y), the FAT of the low-speed memory card 29 is updated ( In step S26), this process ends. If it is determined in step S24 or step S28 that there is no free cluster (in the case of N), this process is terminated.

  FIG. 4 is a flowchart showing FAT search processing when an image file according to the embodiment of the present invention is opened (read). This processing is started when a request for reading an image file from the low-speed memory card 29 is generated in an application (such as a shooting processing program) by the main CPU 10. First, when a request for reading an image file from the low-speed memory card 29 is generated (step S31), it is determined whether or not the high-speed memory card 30 is inserted in the card slot 28 (step S32). If it is determined in step S32 that the high-speed memory card 30 is inserted in the card slot 28 (in the case of Y), the FAT (FAT cache) related to the low-speed memory card 29 cached in the high-speed memory card 30 is stored. Search is performed (step S33), and this process is terminated. If it is determined in step S32 that the high-speed memory card 30 is not inserted in the card slot 28 (in the case of N), the FAT in the low-speed memory card 29 is searched (step S34), and this process is terminated.

[Second speed-up processing]
In the second high-speed processing, the directory information for managing the image file recorded on the low-speed memory card 29 and the file management information based on the incidental information of the image file are recorded on the high-speed memory card 30. In this process, the search information of the image file recorded in the low-speed memory card 29 is acquired using the file management information recorded in the above. Normally, the search of the image file in the low-speed memory card 29 is performed based on the directory information in the low-speed memory card 29 or the incidental information attached to the image file, so the search speed is the data transfer of the low-speed memory card 29. Depends on speed. On the other hand, in this embodiment, based on the directory information of the low-speed memory card 29 and the incidental information of the image file, file management information is created in advance or as necessary, and this is recorded in the high-speed memory card 30. In addition, by accessing the high-speed memory card 30, search information for image files in the low-speed memory card 29 is obtained. Therefore, the search speed can be increased. This will be specifically described below.

  FIG. 5 is a diagram showing an example of the configuration of file management information according to the embodiment of the present invention. In this embodiment, the file management information is composed of a file starting cluster number, a file name, a size (file size), a creation date (file creation date), and search metadata. The leading cluster number, file name, size, and creation date and time of the file are set based on the directory information. The search metadata is set based on the above-mentioned supplementary information attached to the image file. The information set in the search metadata may be a part or all of the various incidental information described above. Various types of information included in the file management information are examples, and information different from these may be set.

  FIG. 6 is a diagram showing a configuration of a cache file set in the high-speed memory card according to the embodiment of the present invention. In FIG. 6, the FAT cache file is a cache file in which the FAT of the low-speed memory card 29 recorded in the first speed-up process is set, and the file information cache file contains the file management information by the second speed-up process. It is a cache file that has been set. Here, the file management information set in the file information cache file is created for all the image files in the low-speed memory card 29, but may be created for a part thereof. Here, it is assumed that the second speed-up process is performed together with the first speed-up process described above, but the second speed-up process may be performed alone.

  FIG. 7 is a flowchart showing cache search processing according to the embodiment of the present invention. This process is started when an image file search request in the low-speed memory card 29 is generated in an application (such as a shooting process program) by the main CPU 10. First, a file information cache file in the high-speed memory card 30 is opened (step S41), and data for a predetermined buffer size is read from the file information cache file into a predetermined buffer area set in the RAM 12 (step S42). Here, the predetermined buffer size is a size allocated to the predetermined buffer area. Next, data in the buffer is searched (step S43), and it is determined whether or not the search is continued (step S44).

  In step S44, when it is determined that the search is not continued (in the case of N), that is, for example, when an image file to be searched is found, this process is terminated. If it is determined in step S44 that the search is to be continued (in the case of Y), it is determined whether or not the search has been completed to the end of the file information cache file (step S45), and the search has not been completed to the end. When it is determined (in the case of N), the process returns to step S42, and the same processing is repeated for the next predetermined buffer size data, and when it is determined that the search is completed to the end (in the case of Y). This process is terminated.

[Third high-speed processing]
In the third high-speed processing, a part of the plurality of image files recorded on the low-speed memory card 29 is recorded (cached) on the high-speed memory card, and the image file to be accessed is cached on the high-speed memory card 30. If the image file is recorded, the image file recorded on the high-speed memory card 30 is accessed. Normally, the access speed to the image file in the low speed memory card 29 depends on the data transfer speed of the low speed memory card 29. On the other hand, in this embodiment, when a part of the image data in the low-speed memory card 29 is recorded in the high-speed memory card 30 and access to the image data recorded in the high-speed memory card 30 occurs. In this case, the image data in the high-speed memory card 30 is accessed. Therefore, the access speed can be increased. This will be specifically described below.

  FIG. 8 is a diagram showing a configuration of a cache file set in the high-speed memory card 30 according to the embodiment of this invention. In FIG. 8, the FAT cache file is a cache file in which the FAT of the low-speed memory card 29 recorded in the first speed-up process is set, and the file information cache file is recorded in the second speed-up process. Cache file with file management information set. Image file caches (1-3) are caches of image files (including supplementary information) recorded on the low-speed memory card 29 recorded in the third speed-up process. Here, three image file caches, ie, image file caches 1 to 3 are illustrated, but more image file caches may be used. Further, the number (or capacity) of the image file cache may be dynamically changed in relation to the free capacity of the high-speed memory card 30.

  Here, it is assumed that the third speed-up process is performed in combination with the first speed-up process and the second speed-up process described above, but the third speed-up process is performed alone or the first speed-up process. The processing may be performed in combination with the conversion processing or the second acceleration processing.

  FIG. 9 is a flowchart showing image file reading processing in the third speed-up processing according to the embodiment of the present invention. This process is started when a request for reading an image file in the low-speed memory card 29 is generated in an application (such as a shooting process program) by the main CPU 10. When a request to read an image file in the low speed memory card 29 is generated, first, the FAT related to the high speed memory card 30 recorded in the high speed memory card 30 is searched (step S51). It is determined whether or not the file is recorded as an image file cache (step S52). If it is determined in step S52 that the image file is recorded as an image file cache in the high speed memory card 30 (Y), the image file is read from the image file cache of the high speed memory card 30 (step S53). ), When it is determined that the image file is not recorded as an image file cache in the high-speed memory card 30 (in the case of N), the image file is read from the low-speed memory card 29 (step S54), and this process ends. To do.

  FIG. 10 is a flowchart showing image file writing processing in the third speed-up processing according to the embodiment of the present invention. This process is started when a request for writing an image file to the low-speed memory card 29 occurs in an application (such as a shooting process program) by the main CPU 10.

  When a request to write an image file to the low-speed memory card 29 is generated, first, the FAT related to the high-speed memory card 30 recorded in the high-speed memory card 30 is searched (step S61), and the image is stored in the high-speed memory card 30. It is determined whether or not there is a cacheable area for recording the file (step S62). If it is determined in step S62 that the high speed memory card 30 has a cacheable area for recording the image file (in the case of Y), the image file is written in the image file cache of the high speed memory card 30 (step S62). In step S63, control is returned to the application at this point (step S65).

  Next, the image file is also written to the low-speed memory card 29 (step S64), and this process is terminated. If it is determined in step S62 that there is no cacheable area for recording the image file in the high speed memory card 30 (in the case of N), step S63 is skipped and the image file is stored in the low speed memory card 29. Writing (step S64), the process is terminated.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment includes all design changes and equivalents belonging to the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Camera, 2 ... Camera body, 3 ... Shooting lens, 10 ... Main CPU, 11 ... ROM, 12 ... RAM, 13 ... Sub CPU, 17 ... Imaging device, 18 ... Imaging signal processing part, 26 ... Controller, 27 ... Card slot A, 28 ... Card slot B, 29 ... Low speed memory card, 30 ... High speed memory card, 31 ... Memory card detector, 32 ... Operation member.

Claims (6)

A first recording medium mounting means capable of mounting a first recording medium having a data transfer speed of a first speed;
A second recording medium mounting means capable of mounting a second recording medium having a second data transfer speed higher than the first speed;
The second recording medium mounted on the second recording medium mounting means, and the control means for accessing the first recording medium mounted on the first recording medium mounting means,
Recording in advance at least a part of the information recorded on the first recording medium mounted on the first recording medium mounting means on the second recording medium mounted on the second recording medium mounting means. A characteristic information processing apparatus.   The control means records area management information related to an arrangement of files recorded on the first recording medium on the second recording medium, and based on the area management information recorded on the second recording medium, The information processing apparatus according to claim 1, wherein a file recorded on one recording medium is accessed.   The control means records, on the second recording medium, file management information based on at least one of directory information for managing the file recorded on the first recording medium and incidental information on the file. 3. The information processing apparatus according to claim 1, wherein search information of a file recorded in the first recording medium is acquired using the recorded file management information.   The control means records at least a part of the plurality of files recorded on the first recording medium on the second recording medium, and the file to be accessed is also recorded on the second recording medium. The information processing apparatus according to claim 1, wherein the information processing apparatus accesses the file recorded on the second recording medium.   The said control means has a memory | storage means with a data transfer speed faster than the said 2nd speed as temporary memory | storage at the time of accessing the said 1st recording medium or the said 2nd recording medium. The information processing apparatus according to any one of the above. An image sensor for capturing an image of a subject;
An imaging apparatus comprising: the information processing apparatus according to claim 1.

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