JP2001128111A - Recording and reproducing device, its method, controller, control method, recording and reproducing control system, and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform file operation. SOLUTION: In this recording and reproducing control system where a data processing controller 10 is connected to a digital still camera 20 through an IEEE 1394 serial bus 50, the digital still camera 20 assigns an unequivocal discrimination number to each of plural files, which are hierarchized and recorded in a set flash memory 32, and uses these discrimination numbers to manage the files. The data processing controller 10 operates plural files stored in the flash memory 32 set to the digital still camera 20 on the basis of discrimination numbers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a recording / reproducing apparatus and a recording / reproducing method for recording and / or reproducing data. Further, the present invention relates to a control device and a control method which are connected to a recording / reproducing device for recording and / or reproducing data and control the recording / reproducing device. Furthermore, the present invention relates to a recording / reproducing control system and a recording / reproducing control method for recording and / or reproducing data by connecting the recording / reproducing device and the control device.

[0002]

2. Description of the Related Art In recent years, digital interfaces supporting high-speed data transfer and real-time transfer have been developed for the purpose of an interface for multimedia data transfer. In recent years, a control device such as a personal computer and a so-called MD (Mini Dis
k) A system has been considered in which a recording / reproducing device such as a device is interconnected, and the control device controls the recording / reproducing device, so that the control device can use the functions of the recording / reproducing device.

In such a recording / reproducing control system, a control command is transmitted from a controller acting as a controller to a recording / reproducing apparatus acting as a device, and the recording / reproducing apparatus operates based on the control command.

In a recording / reproducing control system, when a control device performs file operations such as recording, reproducing, and deleting digital data in file units on a recording medium managed by the recording / reproducing device, for example, M
In the case of the D device, numbers assigned to recording media in ascending order can be used as references to files, that is, tracks of music data. Specifically, when the control device refers to the tenth music data recorded on the recording medium, the recording / reproducing device searches for the tenth file and performs an operation based on the control command.

[0005]

In the above-mentioned recording / reproducing control system, the recording / reproducing apparatus may be a camera storage device such as a digital still camera. A recording and reproducing apparatus such as a digital still camera uses a detachable recording medium such as a flash memory to record digital data.

[0006] Such a digital still camera uses JE as a method of recording still image data and the like on a recording medium.
It adopts the DCF (Design rule of Camera File system) standardized by IDA (Japan Electronic Industry Development Association), and the FAT (File
Allocation Table) is used. In a hierarchical file system based on FAT,
As shown in FIG. 10, for example, data is recorded in a recording unit called a cluster of 8 Kbytes. A cluster representing one directory is composed of a plurality of fixed-length directory entries. This directory entry is
It indicates information on files stored in the directory, and includes information such as file names, file attributes, and creation dates. Here, when one file is divided into a plurality of clusters and recorded, the digital still camera as the recording / reproducing apparatus can access the file by referring to the FAT indicating the connection structure of the file. .

In such a hierarchical file system based on FAT, for example, when a file recorded on a recording medium is referred to by a control device, a digital still camera as a recording / reproducing device refers to the file in a directory structure. The search is performed with the included path name, and the directory entry is sequentially counted, thereby searching for the desired file referred to.

However, in such a hierarchical file system based on FAT, the path name becomes long when the file to be referred is deep in the hierarchy. Therefore, a digital still camera as a recording / reproducing apparatus uses a long path name. It was necessary to search for directory entries, forcing a burdensome process.

As in the above-described MD device, a method of referring to and searching for files by numbers assigned in ascending order is also conceivable. However, it is difficult to realize such a mechanism in a hierarchical file system using FAT. It is. For example, 100 recorded on a recording medium by the control device.
When the file is referred to, the digital still camera as the recording / reproducing apparatus needs to search the referenced file by sequentially counting the directory entries stored in each directory.
In this case, since the digital still camera needs to refer to all directory entries including unused directory entries, the number of times of reading operations on the recording medium is increased, and search efficiency is deteriorated.
Also, with the increase in the capacity of the recording medium, it is possible to record an enormous number of files, for example, thousands,
The search efficiency of the digital still camera deteriorates in proportion to the number of files recorded on the recording medium.

The present invention has been made in view of such circumstances, and solves the problems in the conventional file referencing / retrieval method, and provides a method unique to a file by a method suitable for the FAT hierarchical file system. An object of the present invention is to provide a recording / reproducing apparatus and a recording / reproducing method capable of efficiently referencing / retrieving a file by generating and assigning an identification number. Further, the present invention relates to F
It is an object of the present invention to provide a control device and a control method capable of efficiently operating a file to which a unique identification number is assigned by a method suitable for an AT hierarchical file system. Further, the present invention controls a recording / reproducing device which records a file to which a unique identification number is assigned on a recording medium by a method suitable for a FAT hierarchical file system by a control device, thereby efficiently operating the file. It is an object of the present invention to provide a recording / reproducing control system and a recording / reproducing control method capable of performing the following.

[0011]

A recording / reproducing apparatus according to the present invention for achieving the above-mentioned object is connected to another device via a digital serial bus interface to record and / or reproduce a file on a recording medium. A recording / reproducing apparatus, characterized by comprising a control means for assigning a unique identification number to each of a plurality of files hierarchically recorded on a recording medium and managing the files using the identification numbers. I have.

In the recording / reproducing apparatus according to the present invention, the control means manages the files using the unique identification numbers assigned to each of the plurality of files hierarchically recorded on the recording medium. Do.

A recording and reproducing method according to the present invention for achieving the above object is a recording and reproducing method for recording and / or reproducing a file on a recording medium by connecting to another device via a digital serial bus interface. In addition, a unique identification number is assigned to each of a plurality of files hierarchically recorded on a recording medium, and the files are managed using the identification numbers.

In the recording / reproducing method according to the present invention, file management is performed using a unique identification number assigned to each of a plurality of files hierarchically recorded on a recording medium.

Further, a control device according to the present invention for achieving the above-mentioned object is a control device which is connected to another device via a digital serial bus interface to control the other device, and is mounted on the other device. Control processing means for operating a file recorded on a recording medium based on a unique identification number assigned to each of a plurality of files layered and recorded on the recorded recording medium. Features.

According to the control device of the present invention, the control processing means controls the recording medium based on the unique identification number assigned to each of the plurality of files hierarchically recorded on the recording medium. Perform operations on recorded files.

Further, a control method according to the present invention for achieving the above-described object is a control method for connecting to another device via a digital serial bus interface to control the other device, and controlling the other device. It is characterized in that a file recorded on a recording medium is operated based on a unique identification number assigned to each of a plurality of files hierarchically recorded on a mounted recording medium.

According to the control method of the present invention, a file recorded on a recording medium is recorded on the basis of a unique identification number assigned to each of a plurality of files recorded hierarchically on the recording medium. Perform the above operations.

A recording / reproducing control system according to the present invention for achieving the above object comprises a recording / reproducing device for recording and / or reproducing a file on a recording medium and a control device for controlling the recording / reproducing device. A recording and playback control system connected via a bus interface and controlling the recording and playback device by a control device,
The recording / reproducing device includes control means for assigning a unique identification number to each of a plurality of files hierarchically recorded on the recording medium and managing the files using the identification numbers. It is characterized by comprising control processing means for operating a file recorded on the recording medium based on the number.

The recording / reproduction control system according to the present invention uses a unique identification number assigned to each of a plurality of files hierarchically recorded on the recording medium by the control means in the recording / reproduction device. The file is managed by the control device, and the control processing means of the control device operates the file recorded on the recording medium based on the identification number.

Further, a recording / reproducing control method according to the present invention for achieving the above-mentioned object comprises a recording / reproducing device for recording and / or reproducing a file on a recording medium and a control device for controlling the recording / reproducing device. A recording / reproducing control method for connecting via a bus interface and controlling a recording / reproducing device by a control device, wherein the recording / reproducing device has a unique method for each of a plurality of files hierarchically recorded on a recording medium. Assign an identification number,
The file is managed using the identification number, and the control device
It is characterized in that a file recorded on a recording medium is operated based on the identification number.

According to the recording / reproducing control method of the present invention, a recording / reproducing device uses a unique identification number assigned to each of a plurality of files hierarchically recorded on a recording medium, and uses the unique identification numbers for the files. Management is performed, and a file recorded on the recording medium is operated by the control device based on the identification number.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, an embodiment to which the present invention is applied is IEEE (The Institute of Electrical Engineering).
d Electronics Engineers, Inc.), a high-speed digital interface standard approved by IEEE Std.
1394-1995 IEEE Standard for a High Performance ser
ial Bus standard (hereinafter abbreviated as IEEE 1394)
A data processing control device 10 as a control device as a controller and a digital still camera 2 as a recording / reproducing device as a device controlled by the controller by an IEEE 1394 serial bus 50 conforming to the IEEE 1394 standard.
0 is a connected recording / reproducing control system.

In this recording / reproduction control system, I
AV / C (Audi), which is a standard control command for controlling AV (Audio Video) devices in EEE1394.
o Video / Control) Based on the protocol, the data processing control device 10 performs a file operation on the still image data recorded in the flash memory 32 which is a recording medium mounted on the digital still camera 20.

The data processing control device 10 is, for example, a personal computer. As hardware, the data processing control device 10 is a CPU (Central Process Control) which is a control processing means for controlling each unit.
ng Unit) 11 and IEEE 1394 serial bus 50
In addition to an interface (I / F) 12 which is an acquisition unit for inputting and outputting data to and from the outside via a hard disk drive or a RAM (Rand), not shown.
om Access Memory).

The data processing control device 10 includes a device driver 13 for controlling hardware. The device driver 13 includes a bus driver 13a for controlling physical hardware in IEEE 1394 and a mini-driver 13b corresponding to the AV / C protocol for interpreting the function of the digital still camera 20 to be controlled. Have. The data processing control device 10 stores the device driver 13 in, for example, a hard disk (not shown), and
And executed under the control of the CPU 11.

Further, the data processing control device 10 includes an application program 14 as software for a user to start up and perform an operation. The data processing control device 10 stores the application program 14 in, for example, a hard disk (not shown) and executes it under the control of the CPU 11. The application program 14 will be further described later.

Further, the data processing control device 10
A plurality of external devices can be connected. For example, a printer 40 as a printing device can be connected to print various data.

Such a data processing control device 10
The digital still camera 20 is controlled by the V / C protocol, the still image data recorded in the flash memory 32 mounted on the digital still camera 20 is read and received, and displayed on a monitor (not shown) under the control of the CPU 11. The data is output to the printer 40 and printed.

On the other hand, the digital still camera 20 includes a camera unit 21 for capturing an image of a subject, a control unit 22 for controlling each unit and executing processing, a recording unit 23 for recording data, and an IEEE 1394 serial bus. An interface (I / F) 24, which is a notification means for inputting and outputting data to and from the outside via the interface 50, and an LCD (Liquid Crystal Display) for displaying image data obtained by imaging.
And a unit 25.

The camera section 21 has a lens 26 and a CCD (Charge C) for converting light from the lens 26 into an electric signal.
The control unit 22 includes an shutter (not shown), an optical filter, and the like, and supplies an electric signal obtained by imaging the subject to the control unit 22.

The control unit 22 has functions of a control unit, a discrimination unit and a generation unit, and is obtained by photographing with the CPU 28 for controlling each unit, the RAM 29 as a storage unit for temporarily storing data, and the camera unit 21. And a compression unit 30 for compressing image data of the subject by the generated electric signal. The control unit 22 compresses the still image data by the compression unit 30 and supplies the still image data to the recording unit 23 and the LCD unit 25. The control unit 22
Reproduces the image data recorded in the flash memory 32 in the recording unit 23 and supplies it to the LCD unit 25 or outputs it to the outside via the interface 24.

The recording section 23 has a drive section 31 in which a flash memory 32 is mounted, and a flash memory 32 which is a removable nonvolatile recording medium. Recording unit 23
Records the image data supplied from the control unit 22 in the flash memory 32.

Such a digital still camera 20
Represents the still image data obtained by imaging the subject,
The data is compressed by 0 and recorded in the flash memory 32. Further, the digital still camera 20 converts the still image data into an LC by operating the operation unit (not shown) by the user.
It is displayed on the D section 25.

In a recording / reproduction control system constituted by connecting the data processing control device 10 and the digital still camera 20 via an IEEE 1394 serial bus 50, the data processing control device 10 is connected to the IEEE 139.
The AV / C command, which is a control command conforming to the AV / C protocol, is transmitted to the digital still camera 20 by asynchronous transmission, which is an asynchronous communication defined in 4.
Send to The digital still camera 20 that has received the AV / C command returns a response, which is a control signal indicating the execution result of the AV / C command, to the data processing control device 10 as necessary. Thus, in the recording and reproduction control system, the data processing control device 10 controls the operation of the digital still camera 20.

The digital still camera 20 has a DCF (Design rule of Camera File sys.) Standardized by JEIDA (Japan Electronic Industry Development Association) as a method of recording still image data and the like in the flash memory 32.
tem). The flash memory 32 has a DC
FAT (File AllocationTab)
le) performs a logical format according to the hierarchical file system.

In the DCF, for example, as shown in FIG. 2, "DCIM" which is a directory for storing still image data as a still image file (hereinafter, referred to as a still image file as necessary) in a root directory is stored. It is stipulated that this directory be created.
DCF that actually stores still image files etc. in IM ”
It is defined that a plurality of directories called directories are created.

In the DCF, how to name DCF directory names and file names is defined.
It is stipulated that the F directory name uses numbers for the first three characters and the file name uses numbers for the last four characters of the main file name.

Further, a still image file is an ISO (Inte
JPEG (Joint Photographic Experts G) standardized by the National Organization for Standardization
It is specified that the file is compressed by the (roup) method, and a file whose file name has an extension of “JPG” is used. This still image file is obtained by compressing a single main image obtained by capturing an image of a subject, or thumbnails obtained by reducing the main image so that a list of reduced images of the main image and a plurality of main images can be displayed. It is a compressed version of a thumbnail image.

Further, in the DCF directory,
In addition to a still image file with the extension “JPG”, “TH”
An image file obtained by compressing only a thumbnail image having an extension of “M”, an audio file having an extension of “WAV”, and the like are stored.

In the recording / reproduction control system, when a user activates and operates an application program 14 stored in the data processing control device 10, the application program 14 is transmitted to the digital still camera 20 via the device driver 13. Issue an AV / C command. The main function of the application program 14 is to read a still image file recorded in the flash memory 32 mounted on the digital still camera 20 and display a main image and a list display screen of a plurality of thumbnail images on a monitor (not shown). be able to.

For example, when the user starts the application program 14, the application program 1
4 receives a plurality of thumbnail images recorded in the flash memory 32 mounted on the digital still camera 20 via the IEEE 1394 serial bus 50 as shown in FIG. An operation of displaying a list on a monitor (not shown) together with the name is executed. Here, when all the thumbnail images recorded in the flash memory 32 cannot be displayed, the application program 14 displays another plurality of thumbnail images in a list on a monitor (not shown) by a screen switching operation by the user. You can also.

Further, when the user operates a mouse or the like (not shown) to select an arbitrary thumbnail image from the plurality of thumbnail images, the application program 14 displays the main image corresponding to the selected thumbnail image. Not displayed on the monitor. Specifically, when the user operates a mouse or the like (not shown), the file name is changed to “ABC — 0010.JPG”.
Is selected, the application program 14 displays a main image corresponding to the selected thumbnail image "ABC_0010.JPG" on a monitor (not shown) as shown in FIG.

When the data processing control device 10 activates such an application program 14, the application program 14 performs a series of processes as shown in FIG. 4 to control the digital still camera 20 and store it in the flash memory 32. The recorded still image file is read and displayed on a monitor (not shown).

The still image file recorded in the flash memory 32 mounted on the digital still camera 20 is referenced by the digital still camera 20 when the data processing control device 10 reads the still image file. ID numbers are uniquely generated and assigned. This identification number will be described later in detail.

First, as shown in the figure, the data processing control device 10 sets the IEEE 1394 in step S1.
It detects whether or not the digital still camera 20 connected via the serial bus 50 exists. Specifically, when the operating system has a function of automatically setting the address of the input / output port of the device connected to the data processing control device 10, the digital still camera 20 is detected by this function, Since the necessary device driver 13 is installed, this step ends when the device driver 13 is opened.

Subsequently, in step S2, the data processing control device 10 refers to the still image file for reading the still image file recorded in the flash memory 32 mounted on the digital still camera 20. An identification number acquisition control command, which is an AV / C command for acquiring an identification number uniquely generated corresponding to an image file, is issued. The identification number acquisition control command will be described later.

Subsequently, in step S3, the data processing control device 10 reads the thumbnail image of the AV / C command for reading the thumbnail image of the identification number obtained based on the identification number obtaining control command issued in step S2. A read control command is issued, and data of a thumbnail image corresponding to the acquired identification number is received.
The data of the thumbnail images is transferred from the digital still camera 20 to the data processing control device 10 by asynchronous stream transfer.

Subsequently, in step S4, the data processing control device 10 issues a file name read control command, which is an AV / C command for reading the file name of the thumbnail image received in step S3, Read the file name of the image.

Subsequently, in step S5, the data processing control device 10 displays the received thumbnail image and file name on a monitor (not shown).

Subsequently, the data processing control device 10 determines whether or not another thumbnail image that can be displayed on a monitor (not shown) is recorded in the flash memory 32 in step S6.

Here, if there is another thumbnail image, the data processing control device 10 shifts the processing to step S3, and repeats the processing of steps S3 to S6 until there is no other thumbnail image. In this manner, the data processing control device 10 displays a list of, for example, 16 thumbnail images as shown in FIG. 3A on a monitor (not shown).

On the other hand, if there is no other thumbnail image, that is, if, for example, 16 thumbnail images as shown in FIG. In step S7, it is determined whether or not the user has selected an arbitrary thumbnail image from a plurality of thumbnail images by operating, for example, a mouse (not shown).

If a thumbnail image has not been selected, the data processing control device 10 waits until a thumbnail image is selected.

On the other hand, when the thumbnail image is selected, the data processing control device 10 determines in step S8 that the main image reading control which is an AV / C command for reading the main image corresponding to the selected thumbnail image. A command is issued, and data of the main image corresponding to the selected thumbnail image is received.

Then, in step S9, the data processing control device 10 displays the received main image on a monitor (not shown), and ends a series of processing.

Thereafter, the data processing control device 10 can display another main image on a monitor (not shown) according to the operation by the user. In this case, the data processing control device 10 displays the other main images on a monitor (not shown) by performing the processes of steps S8 and S9.

When other thumbnail images not displayed on the monitor (not shown) are recorded in the flash memory 32, the data processing control device 10 displays a list of these thumbnail images in response to a user operation. It can be displayed on a monitor (not shown) as a separate page. In this case, the data processing control device 10
By repeating the third and subsequent processes, a list of other thumbnail images is displayed as a separate page on a monitor (not shown). In this case, as described later, the identification number acquisition control command specifies a parameter for specifying the range of the identification number to be acquired.

The data processing control device 10 can control the digital still camera 20 and perform a file operation through such a series of processing.

Next, the above-mentioned identification number used for referring to a still image file will be described.

As a method of referring to a still image file, a unique identification number is assigned to each still image file recorded in the flash memory 32 in the flash memory 32, and the file name is associated with the identification number. The management list may be held and managed in the RAM 29 of the digital still camera 20 or another memory (not shown). By doing so, the digital still camera 20 can convert the identification number of the file specified by the data processing control device 10 into a file name based on the management list, and perform a search.

However, according to this method, when the number of files recorded in the flash memory 32 is large, the capacity of the management list increases accordingly, so that the memory capacity of the digital still camera 20 increases. Therefore, the digital still camera 20
May increase the production cost and may not be expected to spread as consumer equipment.

Therefore, it is proposed here to generate and assign a unique identification number in the flash memory 32 to each still image file by a method suitable for the FAT hierarchical file system.

In the hierarchical file system based on FAT, the management information of each file is recorded in a directory entry of a directory. Therefore, as shown in FIG. 5, the identification number is a combination of a cluster number, which is a recording address indicating a directory to which a file belongs, and a number (recording position) indicating the order of directory entries in the directory. Defined by the format consisting of That is, the identification number does not take into account which layer the still image file belongs to in the hierarchical file system based on the FAT. And uniquely defined.

In this way, after the data processing control device 10 issues the above-described identification number acquisition control command to acquire the identification number corresponding to each still image file, the digital still camera 20 It is not necessary to perform an operation such as searching for all directory entries, the management information of the still image file can be directly accessed based on the identification number, and the data processing control device 10 sets the identification number by another AV / C command. By specifying, management information of the specified still image file can be searched very efficiently.

For example, since the file name, creation date and time, size, etc. of the still image file are recorded in the directory entry, an AV / C command for acquiring such information is issued from the data processing control device 10. Thus, the digital still camera 20 can reduce the number of accesses to the memory or the like, reduce the load on the CPU 28, and perform an operation responsive to the AV / C command. Such an effect is achieved by the flash memory 32
Becomes more noticeable as the number of still image files recorded in the.

When the directory is divided into a plurality of clusters, the identification number may be a combination of the cluster number of the directory to which the directory entry belongs and a number indicating the order of the directory entry in the cluster. Good.

The frame format of the above-mentioned identification number acquisition control command is as shown in FIG. In the figure, an opcode (opcode) and an operand (operand) written in a so-called FCP frame (Function Control Protocol frame) in a data block (data block) following a packet header (packet header) in an asynchronous packet of IEEE1394. The left side shows a command frame of an identification number acquisition control command issued via the device driver 13 in the data processing control device 10, and the right side shows a digital still corresponding to the identification number acquisition control command. 3 shows a response frame of a response issued by the camera 20 and returned to the data processing control device 10.

In the 1-byte opcode in the command frame, information indicating that this command is an identification number acquisition control command is specified. In the 1-byte opcode in the response frame, information indicating that this response is a response to the identification number acquisition control command is specified.

Further, the following parameters are designated as operands in the command frame. In addition, the same information is specified as the operand in the response frame in correspondence with the parameter in the command frame, and the following information is specified.

First, a volume number is specified by, for example, 2 bytes in an operand in a command frame. The volume number is, for example, a drive number for designating each flash memory when the digital still camera 20 can mount a plurality of flash memories.

Next, as the operand in the command frame, a validity indication number, which is a number indicating the validity of the file operation, is specified by, for example, 2 bytes. The validity instruction number changes when, for example, the flash memory 32 attached to the digital still camera 20 is replaced with another flash memory, and whether the correct flash memory is accessed, that is, the same flash memory is used. It is used to determine whether or not the memory 32 is being accessed.

For example, consider a case where the data processing control device 10 attempts to operate a still image file corresponding to an arbitrary identification number recorded in the flash memory 32. Here, when the data processing control device 10 operates the still image file corresponding to the specified identification number without knowing that the flash memory 32 has been replaced with another flash memory, the data is recorded in another flash memory. Other files corresponding to the same identification number will be operated.

Therefore, the data processing control device 10 designates a validity indication number as an operand in a command frame to prevent such an erroneous operation. The validity instruction number will be described later.

Next, the attribute of the target file is specified by an arbitrary byte in the operand in the command frame. The attribute of the target file is, for example, an extension in the file name of the file to be referred to in order to correspond to a hierarchical file system based on FAT. For example, when a still image file is targeted, the operand in the command frame includes “J”.
PG "is designated. The digital still camera 20 searches only still image files based on this parameter. When all files are targeted regardless of the attribute, As the operand in the command frame, a parameter indicating a so-called world card “***” is specified.

Next, in the operand in the command frame, the number of the start position of the search range is specified by an arbitrary byte. In the operand in the command frame, the number of files in the range is specified by an arbitrary byte.

For example, when a list of thumbnail images is displayed on a monitor (not shown) of the data processing control device 10, the range of the thumbnail image to be displayed is selected from a plurality of thumbnail images recorded in the flash memory 32. Required to specify. In particular,
In the case where the thumbnail images from the 17th thumbnail image to the 32nd thumbnail image are designated among the plurality of thumbnail images recorded in the flash memory 32 in ascending order, the operand in the command frame includes the start of the search range. As the position number, information indicating “17th” is specified, and as the number of files in the range,
Information indicating “16” is specified. With these parameters, the data processing control device 10 does not need to acquire the identification numbers of all the still image files recorded in the flash memory 32, and can perform file operations efficiently. As these parameters, for example, only the number of the start position of the search range may be specified, and the search range beyond the specified number may be used. In this case, if the file corresponding to the number of the start position of the search range is not recorded in the flash memory 32, the search range starting from the number corresponding to the adjacent file may be used.

On the other hand, as the operand in the response frame to such a command frame, the same operand is designated corresponding to the parameter in the above-mentioned command frame.

The number of files matched in the search is specified as the operand in the response frame. The number of files that match in this search is a parameter indicating the number of files that match the search condition as a result of the search performed by the digital still camera 20 based on the parameters in the above-described command frame. Needless to say, the number of files matched in this search is equal to or less than the number of files in the range in the parameters in the above-described command frame.

Further, a list of identification numbers corresponding to the files matched in the search is specified as the operand in the response frame. This identification number is specified by listing the identification numbers for the number of files matched in the search.

In the recording / reproduction control system, the data processing control device 10 issues an identification number acquisition control command composed of the above-mentioned command frame. Then, based on the identification number acquisition control command, the digital still camera 20 searches for a file recorded in the flash memory 32, generates and assigns an identification number, and assigns a response consisting of the above-described response frame to data processing control. By sending a reply to the device 10, the identification number is notified. This operation corresponds to the process in step S2 shown in FIG.

Next, the validity indication number specified in the operand in the command frame will be described. In the recording / reproduction control system, the data processing control device 1
0 acquires this validity indication number by another AV / C command in step S2 shown in FIG. 4 earlier, that is, before issuing the identification number acquisition control command.

The frame format of the validity acquisition control command for acquiring the validity instruction number is as shown in FIG. In the figure, the area of the opcode and the operand described in the FCP frame in the asynchronous packet of IEEE1394 is shown, and on the left side,
Device driver 13 in data processing control device 10
Shows the command frame of the validity acquisition control command issued via the digital camera 20. On the right side, the response of the response issued by the digital still camera 20 in response to the validity acquisition control command and returned to the data processing control device 10. Indicates a frame.

Information indicating that this command is a validity acquisition control command is specified in the 1-byte opcode in the command frame. Further, information indicating that this response is a response to the validity acquisition control command is specified in the 1-byte opcode in the response frame.

The above-mentioned volume number is specified by, for example, 2 bytes in the operand in the command frame. On the other hand, in the operand in the response frame to such a command frame, a number indicating the validity of the file operation is specified in addition to the volume number.

As described above, the digital still camera 20
When the data processing control device 10 issues a validity acquisition control command, the data processing control device 10 generates a validity instruction number under the control of the CPU 28 and returns the data to the data processing control device 10 as a response. The validity instruction number is managed by the digital still camera 20. The validity indication number needs to recognize that the digital still camera 20 has changed its validity due to the exchange of the flash memory 32. When the digital still camera 20 is connected to the IEEE 1394 serial bus 50 or when the digital still camera 20
Is desirably unique from the time when the power supply is turned on. Therefore, the digital still camera 20 assigns an ascending or descending number under the control of the CPU 28 every time the flash memory 32 is replaced with another flash memory, or when the digital still camera 20 has an internal clock. Generates a validity indication number based on the time information. The digital still camera 20 holds the generated validity instruction number in the RAM 29 until the flash memory 32 is replaced.

The data processing control device 10 specifies the validity indication number acquired by the validity acquisition control command in the above-described identification number acquisition control command, and issues the identification number acquisition control command to the digital still camera 20. .

When the digital still camera 20 receives the identification number acquisition control command, the digital still camera 20
The validity indicator number specified in the command frame,
The validity instruction number stored in the RAM 29 is compared with the validity instruction number.

If the two validity indication numbers are the same, the flash memory 32 has not been replaced, and the digital still camera 20 determines whether the file is valid based on the received identification number acquisition control command. Perform a search.

On the other hand, if the two validity indication numbers are different from each other, it means that the flash memory 32 has been replaced. Therefore, the digital still camera 20 informs the digital still camera 20 that the flash memory 32 has been replaced as an error process. A response indicating an appropriate error code is returned to the data processing control device 10. In this case, the data processing control device 10 issues the validity acquisition control command and the identification number acquisition control command again.

As described above, in the recording / reproducing control system, the validity of the identification number can be recognized, and the flash memory 3 mounted on the digital still camera 20 can be recognized.
Even if 2 is exchanged, erroneous operation of the file can be prevented.

In the recording / reproducing control system, as described above, the data processing control device 10 obtains the identification number. At this time, in practice, the data processing control device 10 uses an AV / C descriptor (descriptor) in the AV / C protocol. , The contents of the file are referenced.

The AV / C descriptor indicates a content such as a file, and is held in, for example, the RAM 29 of the digital still camera 20 or the like. Each file recorded in the flash memory 32 mounted on the digital still camera 20 is associated with an AV / C descriptor, and the AV / C descriptor is a descriptor identifier (descriptor).
or identifier).

The descriptor identifier used in the digital still camera 20 has a structure as shown in FIG. That is, the descriptor identifier includes the above-described volume number, validity indication number, and identification number. The volume number, the validity indication number, and the identification number correspond to a list_ID (List_ID) and an operation_ID (O as contents in the AV / C descriptor, respectively.
peration_ID) and object_ID (Object_ID).

In the recording / reproducing control system, each file can be specified by such a descriptor identifier.

Further, in the recording / reproducing control system,
As described above, when the data processing control device 10 obtains the identification number, it performs a file operation, for example, specifies a file. In this case, too, a descriptor identifier is used. As a specific example, FIG. 9 shows a frame format of the above-described thumbnail image reading control command. It should be noted that in FIG.
94 shows the area of the opcode and the operand written in the FCP frame in the asynchronous packet 94, the left side shows the command frame of the thumbnail image reading control command issued via the device driver 13 in the data processing control device 10, and the right side In response to the thumbnail image reading control command, the digital still camera 20 issues the data processing control device 10
Indicates the response frame of the response that is returned.

Information indicating that this command is a thumbnail image reading control command is specified in the 1-byte opcode in the command frame. Also,
In the 1-byte opcode in the response frame, information indicating that this response is a response to the thumbnail image reading control command is specified.

[0099] In the operand in the command frame, a descriptor identifier is specified by an arbitrary byte. In the operand in the command frame, a device that outputs data, in this case, a source plug number (SOURCE_PLUG) indicating a logical exit at the time of outputting data in the digital still camera 20 is specified by an arbitrary byte. In contrast, a descriptor identifier is specified as an operand in the response frame.

As described above, in the recording / reproduction control system, the data processing control device 10 controls the digital still camera 20 via the IEEE 1394 serial bus 50 by the AV / C command created by using the descriptor identifier. It is possible to control and operate a file recorded in the flash memory 32.

As described above, in the recording / reproduction control system shown as an embodiment of the present invention, the data processing control device 10 and the digital still camera 20 are connected by the IEEE 1394 serial bus 50, and each file is The file management, that is, the file reference / search is performed using the identification number which is flat and uniquely defined in the flash memory 32, and is recorded in the flash memory 32 by the data processing control device 10. File operations can be performed efficiently.

In the recording / reproduction control system,
The identification number maintains its uniqueness even when a file is deleted. Therefore, in the recording / reproduction control system, for example, as compared with a method of using numbers assigned to recording media in ascending order as a file reference, such as a so-called MD (Mini Disk) device,
Thus, erroneous operations can be prevented even when performing file operations such as file deletion or new creation.

Further, in the recording / reproducing control system, since the range of the identification number to be acquired and the parameter of the attribute of the file can be designated in the identification number acquisition control command, the flash memory 32 has a huge number of, for example, thousands. Even when a file is recorded, it is possible to efficiently perform a file operation by referring and searching only a desired file.

Further, in the recording / reproducing control system, since the validity of the file identification number can be recognized, erroneous operation of the file is prevented even when the flash memory 32 is replaced with another flash memory, for example. can do. By doing so, in the recording / reproduction control system, it is possible to notify the data processing control device 10 that the flash memory 32 has been replaced with another flash memory. It is not necessary to confirm whether or not the flash memory 32 has been replaced each time.

The present invention is not limited to the above-described embodiment. For example, not only an IEEE1394 network but also a so-called Ethernet or USB
The present invention can also be applied to a network constructed with a digital serial bus such as.

In the above embodiment, the data processing control device 10 is used as the controller. However, in the present invention, the controller may be, for example, a printer. However, in this case, the printer
Needless to say, it is necessary to have a function capable of issuing an AV / C command.

Further, in the above-described embodiment, reading / displaying of a thumbnail image or a main image has been described as a file operation. However, the present invention provides an AV / C for performing processing such as processing or deleting a file. The present invention can be applied to the case where these processes are performed by issuing a command.

In addition, it goes without saying that the present invention can be appropriately changed without departing from the spirit of the present invention.

[0109]

As described in detail above, the recording / reproducing apparatus according to the present invention is connected to another device via a digital serial bus interface, and records and / or reproduces a file on a recording medium. An apparatus is provided with control means for assigning a unique identification number to each of a plurality of files hierarchically recorded on a recording medium and managing the files using the identification numbers.

Therefore, in the recording / reproducing apparatus according to the present invention, the control means manages the files by using the unique identification numbers assigned to each of the plurality of files hierarchically recorded on the recording medium. This makes it possible to efficiently refer to and search for files.

The recording / reproducing method according to the present invention is a recording / reproducing method for recording and / or reproducing a file on a recording medium by connecting to another device via a digital serial bus interface. A unique identification number is assigned to each of a plurality of hierarchically recorded files, and the files are managed using the identification numbers.

Therefore, the recording / reproducing method according to the present invention manages files by using a unique identification number assigned to each of a plurality of files hierarchically recorded on a recording medium, thereby improving efficiency. This makes it possible to refer to and search for files.

Further, the control device according to the present invention is a control device which is connected to another device via a digital serial bus interface and controls the other device. Control processing means for operating a file recorded on a recording medium based on a unique identification number assigned to each of a plurality of files recorded in a format.

Therefore, the control device according to the present invention
By the control processing means, it is possible to efficiently operate the files recorded on the recording medium based on the unique identification numbers assigned to each of the plurality of files hierarchically recorded on the recording medium. it can.

Further, the control method according to the present invention provides the following:
A control method for connecting to another device via a digital serial bus interface and controlling the other device,
The file recorded on the recording medium is operated based on a unique identification number assigned to each of a plurality of files layered and recorded on a recording medium mounted on another device.

Therefore, the control method according to the present invention
Based on a unique identification number assigned to each of a plurality of files hierarchically recorded on a recording medium,
It is possible to efficiently operate files recorded on a recording medium.

The recording / reproducing control system according to the present invention connects a recording / reproducing device for recording and / or reproducing a file to / from a recording medium and a control device for controlling the recording / reproducing device via a digital serial bus interface. A recording / reproducing control system for controlling the recording / reproducing device by the control device, wherein the recording / reproducing device assigns a unique identification number to each of a plurality of files hierarchically recorded on the recording medium, and The control device includes a control unit that manages the file using the number, and the control device includes a control processing unit that operates the file recorded on the recording medium based on the identification number.

Therefore, the recording / reproducing control system according to the present invention uses
By managing files using unique identification numbers assigned to each of a plurality of files hierarchically recorded on a recording medium, files can be efficiently referenced and searched, and control can be performed. By the control processing means in the device, the file recorded on the recording medium can be operated efficiently based on the identification number.

Further, according to the recording / reproducing control method of the present invention, a recording / reproducing device for recording and / or reproducing a file on a recording medium is connected to a control device for controlling the recording / reproducing device via a digital serial bus interface. A recording / reproduction control method for controlling the recording / reproduction device by the control device, wherein the recording / reproduction device assigns a unique identification number to each of a plurality of files hierarchically recorded on the recording medium, and The file is managed using the number, and the control device operates the file recorded on the recording medium based on the identification number.

Therefore, according to the recording / reproducing control method of the present invention, the recording / reproducing device manages a file by using a unique identification number assigned to each of a plurality of files hierarchically recorded on a recording medium. By performing the above, it is possible to efficiently refer to and search for the file, and the control device can
It is possible to efficiently operate files recorded on a recording medium.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a recording / reproduction control system shown as an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a directory structure defined in a DCF.

3A and 3B are explanatory diagrams of display contents of a thumbnail image and a main image by an application program in the data processing control device, wherein FIG. 3A is a diagram showing a thumbnail image list display screen, and FIG. FIG. 14 is a diagram showing a display screen of a main image corresponding to a thumbnail image that has been displayed.

FIG. 4 illustrates a series of steps when the data processing control device reads and displays a still image file recorded in a flash memory by controlling a digital still camera according to an application program in the recording and reproduction control system. FIG.

FIG. 5 is a diagram illustrating a format of an identification number.

FIG. 6 is a diagram illustrating a frame format of an identification number acquisition control command.

FIG. 7 is a diagram illustrating a frame format of a validity acquisition control command.

FIG. 8 is a diagram illustrating the structure of a descriptor identifier.

FIG. 9 is a diagram illustrating a frame format of a thumbnail image reading control command.

FIG. 10 is a diagram illustrating a hierarchical file system using FAT.

[Explanation of symbols]

10 data processing control device, 11 CPU, 12
Interface, 13 device driver, 14
Application program, 20 digital still camera, 21 camera unit, 22 control unit, 23
Recording unit, 24 interfaces, 25 LCD
Part, 26 lens, 27 CCD part, 28 CP
U, 29 RAM, 30 compression unit, 31 drive unit, 32 flash memory, 40 printer,
50 IEEE1394 serial bus

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G11B 31/00 H04N 5/91 Z H04N 5/225 G06F 15/40 370B 5/765 15/403 380F 5/92 15 / 62 330A // G11B 27/00 H04N 5/91 J L 5/92 H

Claims (93)

[Claims] 1. A recording / reproducing apparatus which is connected to another device via a digital serial bus interface and records and / or reproduces a file on a recording medium, comprising: a plurality of layers recorded on the recording medium in a hierarchical manner. And a control means for assigning a unique identification number to each of the files and managing the files using the identification numbers. 2. The recording / reproducing apparatus according to claim 1, further comprising a notifying unit for notifying the other device of the identification number of the file recorded on the recording medium. 3. The recording / reproducing apparatus according to claim 1, further comprising: generating means for generating the identification number based on a recording position on the recording medium on which information of each file is recorded. 4. The apparatus according to claim 3, wherein the generation unit generates the identification number based on a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. The recording / reproducing apparatus as described in the above. 5. A notifying means for notifying a part of the identification number of the identification number of a file recorded on the recording medium to the other device based on a search range designated by the another device. The recording / reproducing apparatus according to claim 1, further comprising: 6. An ascending number is assigned to each file recorded on the recording medium, and the search range includes a search start position number and a file number among the ascending numbers. 6. The recording / reproducing apparatus according to claim 5, wherein the recording / reproducing apparatus is represented based on the following. 7. An ascending number is assigned to each file recorded on the recording medium, and the search range is a number after the search start position number among the ascending numbers. The recording / reproducing apparatus according to claim 5, wherein 8. If the file corresponding to the number of the search start position is not recorded on the recording medium, the search range starts from the number corresponding to the adjacent file. 8. The recording / reproducing apparatus according to 7. 9. A method for notifying the other device of a part of the identification numbers of the files recorded on the recording medium, based on attribute information of the file specified by the other device. 2. The recording / reproducing apparatus according to claim 1, further comprising a notification unit. 10. The recording / reproducing apparatus according to claim 9, wherein the attribute information is an extension in a file name. 11. A method according to claim 11, further comprising determining means for determining whether or not the recording medium is correct based on a validity indication number indicating validity of a file operation based on the identification number. 2. The recording / reproducing apparatus according to 1. 12. The recording / reproducing apparatus according to claim 11, further comprising: notifying means for notifying the validity instruction number to the other device; and storage means for holding the validity instruction number. 13. The apparatus according to claim 12, wherein said discriminating means compares the validity instruction number notified from said another device with a validity instruction number stored in said storage means. Recording and playback device. 14. The recording / reproducing apparatus according to claim 11, further comprising generating means for generating the validity instruction number. 15. The recording / reproducing apparatus according to claim 14, wherein said generating means generates said validity instruction number by assigning numbers in ascending order or descending order. 16. The recording / reproducing apparatus according to claim 14, wherein said generating means generates said validity instruction number based on time information. 17. A camera unit for imaging a subject, a recording unit for recording image data obtained by imaging by the camera unit on the recording medium, and a control unit for controlling the camera unit and the recording unit. 2. The recording / reproducing apparatus according to claim 1, wherein the recording / reproducing apparatus is at least a digital still camera. 18. The recording / reproducing apparatus according to claim 17, further comprising display means for displaying image data obtained by imaging by the camera unit. 19. The recording / reproducing apparatus according to claim 1, wherein the other device is a control device. 20. The recording / reproducing apparatus according to claim 1, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. . 21. The digital serial bus interface is an IEEE 1394 high performance device.
2. The recording and reproducing apparatus according to claim 1, wherein the recording and reproducing apparatus conforms to a serial bus standard. 22. A recording / reproducing method for recording and / or reproducing a file on / from a recording medium by connecting to another device via a digital serial bus interface, the method comprising: A unique identification number is assigned to each of the files, and the files are managed using the identification numbers. 23. The recording / reproducing method according to claim 22, wherein the identification number of the file recorded on the recording medium is notified to the other device. 24. The recording / reproducing method according to claim 22, wherein the identification number is generated based on a recording position on the recording medium where information of each file is recorded. 25. The recording / reproducing method according to claim 24, wherein the identification number is generated based on a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. . 26. Notifying the other device of a part of the identification numbers of the identification numbers of the files recorded on the recording medium based on a search range designated by the other device. The recording / reproducing method according to claim 22, characterized in that: 27. A part of the identification number of the file recorded on the recording medium is notified to the other device based on the attribute information of the file specified by the another device. The recording / reproducing method according to claim 22, further comprising a notifying unit. 28. The recording according to claim 22, wherein whether or not the recording medium is correct is determined based on a validity indication number indicating the validity of the file operation based on the identification number. Playback method. 29. The recording / reproducing method according to claim 28, wherein the validity instruction number is notified to the other device and the validity instruction number is stored in a storage unit. 30. The recording / reproducing method according to claim 29, wherein the validity instruction number notified from the other device is compared with the validity instruction number stored in the storage means. 31. The recording / reproducing method according to claim 28, wherein said validity instruction number is generated. 32. The recording / reproducing method according to claim 22, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. . 33. The digital serial bus interface comprises an IEEE 1394 high performance device.
The recording / reproducing method according to claim 22, wherein the recording / reproducing method conforms to a serial bus standard. 34. A control device connected to another device via a digital serial bus interface to control the other device, wherein the control device is hierarchically recorded on a recording medium mounted on the other device. A control device comprising: control processing means for operating a file recorded on the recording medium based on a unique identification number assigned to each of a plurality of files. 35. The control device according to claim 34, further comprising an acquisition unit configured to acquire the identification number from the another device. 36. The control device according to claim 34, wherein the identification number is represented based on a recording position on the recording medium where information of each file is recorded. 37. The control device according to claim 36, wherein the identification number is represented by a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. 38. An image processing apparatus, comprising: acquiring means for acquiring, from the other device, a part of the identification numbers of the files recorded on the recording medium based on a designated search range. 35. The control device of claim 34. 39. Each file recorded on the recording medium is assigned an ascending number, and based on the number of the search start position among the ascending numbers and the number of files, The control device according to claim 38, wherein a range is specified. 40. Each file recorded on the recording medium is assigned an ascending number, and a number starting from a search start position in the ascending number is designated as the search range. The control device according to claim 38, wherein: 41. An apparatus according to claim 41, further comprising: acquiring means for acquiring, from the other device, a part of the identification numbers of the files recorded on the recording medium based on the attribute information of the designated file. 35. The control device according to claim 34, wherein: 42. The control device according to claim 41, wherein the attribute information is an extension in a file name. 43. The control device according to claim 34, further comprising an acquisition unit configured to acquire a validity indication number indicating the validity of the file operation based on the identification number from the another device. 44. The control processing means for designating the identification number and the validity indication number acquired by the acquisition means for a control command issued to the other device. The control device according to claim 43. 45. The another device, comprising: a camera unit for capturing an image of a subject; a recording unit for recording image data obtained by capturing the image on the recording unit on the recording medium; and the camera unit and the recording unit. 35. The control device according to claim 34, wherein the control device is a digital still camera including at least a control unit for controlling. 46. The control device according to claim 45, wherein the other device includes a display unit that displays image data obtained by capturing an image by the camera unit. 47. A printing device for printing various data is connected, and the control processing means causes the printing device to print a file recorded on the recording medium received from the other device. The control device according to claim 34, wherein: 48. The control device according to claim 34, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. 49. The digital serial bus interface comprises an IEEE 1394 high performance
The control device according to claim 34, wherein the control device conforms to a serial bus standard. 50. A control method for connecting to another device via a digital serial bus interface to control the other device, wherein the control method is performed in a hierarchical manner on a recording medium mounted on the other device. A control method, wherein a file recorded on the recording medium is operated based on a unique identification number assigned to each of a plurality of files. 51. The control method according to claim 50, wherein said identification number is obtained from said another device. 52. The control method according to claim 50, wherein the identification number is represented based on a recording position on the recording medium where information of each file is recorded. 53. The control method according to claim 52, wherein the identification number is represented by a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. 54. The apparatus according to claim 50, wherein a part of the identification numbers of the files recorded on the recording medium is acquired from the other device based on the designated search range. The control method described. 55. A method according to claim 55, wherein a part of the identification numbers of the files recorded on the recording medium is obtained from the other device based on the attribute information of the designated file. Item 50. The control method according to Item 50. 56. The control method according to claim 50, wherein a validity indication number indicating the validity of the file operation based on said identification number is obtained from said another device. 57. The control method according to claim 56, wherein the control command issued to the other device specifies the identification number and the acquired validity instruction number. 58. The control method according to claim 50, wherein a printing device that prints various connected data is caused to print a file recorded on the recording medium received from the other device. 59. The control method according to claim 50, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. 60. The digital serial bus interface is an IEEE 1394 high performance device.
The control method according to claim 50, wherein the control method conforms to a serial bus standard. 61. A recording / reproducing device for recording and / or reproducing a file on a recording medium and a control device for controlling the recording / reproducing device are connected via a digital serial bus interface. A recording and playback control system, wherein the recording and playback device assigns a unique identification number to each of a plurality of files hierarchically recorded on the recording medium, and uses the identification number to assign a file. A recording / reproduction control system, comprising: a control unit that manages a file recorded on the recording medium based on the identification number. 62. The recording / reproducing device further comprises a notifying unit for notifying the control device of the identification number of a file recorded on the recording medium, and the control device sends the identification number from the recording / reproducing device. 62. An acquisition unit for acquiring an image.
The recording / reproducing control system according to the above. 63. The recording apparatus according to claim 61, wherein said recording / reproducing apparatus includes a generation unit for generating the identification number based on a recording position on the recording medium where information of each file is recorded. Playback control system. 64. The method according to claim 63, wherein the generation unit generates the identification number based on a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. The recording / reproducing control system according to the above. 65. The recording / reproducing device, based on a search range specified by the control device, assigns a part of the identification numbers of the files recorded on the recording medium to the control device. Notifying means for notifying, the control device further comprising: obtaining means for obtaining, from the recording / reproducing device, a part of the identification numbers of the identification numbers of the files recorded on the recording medium. 62. The recording / reproduction control system according to claim 61. 66. Each file recorded on the recording medium is assigned an ascending number, and the control device determines a search start position number and a file number among the ascending numbers. 66. The recording / reproduction control system according to claim 65, wherein the search range is specified based on the search range. 67. Each file recorded in the recording medium is assigned an ascending number, and the control device sets the search range starting from the number of the search start position in the ascending number as the search range. 67. The recording / reproduction control system according to claim 65, wherein the system is designated. 68. When the file corresponding to the number of the search start position is not recorded on the recording medium, the recording / reproducing apparatus sets the search range starting from the number corresponding to the adjacent file. 67. The method of claim 67, wherein
The recording / reproducing control system according to the above. 69. The recording / reproducing device, based on attribute information of a file specified by the control device, controls the control unit to change a part of the identification numbers of the files recorded on the recording medium to the control information. Notifying means for notifying a device, the control device includes an obtaining unit for obtaining, from the recording / reproducing device, a part of identification numbers of the identification numbers of the files recorded on the recording medium. 62. The recording / reproduction control system according to claim 61, wherein: 70. The recording / reproduction control system according to claim 69, wherein said attribute information is an extension in a file name. 71. The recording / reproducing device, comprising: a determination unit configured to determine whether the recording medium is correct based on a validity indication number indicating validity of a file operation based on the identification number; Notifying means for notifying the control device of a validity instruction number, and storage means for holding the validity instruction number, the control device comprising: an acquisition unit for acquiring the validity instruction number from the recording / reproducing device. 62. The recording / reproduction control system according to claim 61, further comprising: 72. The control processing means specifies the identification number and the validity indication number acquired by the acquisition means in response to a control command issued to the recording / reproducing device. 72. The recording / reproducing control system according to claim 71, wherein the validity instruction number notified from the control device is compared with the validity instruction number stored in the storage unit. 73. The recording / reproducing control system according to claim 61, wherein said recording / reproducing device comprises a generating means for generating said validity instruction number. 74. The recording / reproducing control system according to claim 73, wherein said generating means generates said validity instruction number by assigning numbers in ascending order or descending order. 75. The recording / reproduction control system according to claim 73, wherein said generating means generates said validity instruction number based on time information. 76. A recording / reproducing apparatus comprising: a camera section for capturing an image of a subject; a recording section for recording image data obtained by the camera section on the recording medium; and the camera section and the recording section. 62. The recording / reproduction control system according to claim 61, wherein the recording / reproduction control system is a digital still camera including at least a control unit for controlling. 77. The recording / reproducing control system according to claim 76, wherein said recording / reproducing device includes display means for displaying image data obtained by imaging by said camera section. 78. The control device is connected to a printing device for printing various data, and the control processing means transmits a file recorded on the recording medium received from the recording / reproducing device to the printing device. 62. The recording / reproduction control system according to claim 61, wherein printing is performed. 79. The recording / reproduction control according to claim 61, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. system. 80. The digital serial bus interface comprises an IEEE 1394 high performance
62. The recording / reproduction control system according to claim 61, wherein the recording / reproduction control system conforms to a serial bus standard. 81. A recording / reproducing device for recording and / or reproducing a file on / from a recording medium and a control device for controlling the recording / reproducing device are connected via a digital serial bus interface. A recording / reproducing control method for controlling the recording / reproducing device, wherein the recording / reproducing device assigns a unique identification number to each of a plurality of files hierarchically recorded on the recording medium, and uses the identification number to A recording / reproduction control method, wherein the control device performs a file operation recorded on the recording medium based on the identification number. 82. The control device issues an identification number acquisition control command for acquiring the identification number from the recording / reproducing device, and the recording / reproducing device performs the recording / reproducing based on the identification number acquisition control command. 82. The recording / reproduction control method according to claim 81, wherein the identification number of the file recorded on the medium is returned as a response to the control device. 83. The recording / reproduction control method according to claim 81, wherein the recording / reproduction device generates the identification number based on a recording position on the recording medium where information of each file is recorded. 84. The method according to claim 83, wherein the generation unit generates the identification number based on a combination of a recording address indicating a directory to which each file belongs and a recording position of a directory entry in the directory. The recording / reproduction control method described in the above. 85. The control device acquires an identification number for designating a search range of a file recorded on the recording medium and acquiring a part of the identification numbers from the recording / reproducing device. The recording / reproducing device issues a control command, and based on the identification number acquisition control command, the recording / reproducing device sends a partial identification number of the identification numbers of the files recorded on the recording medium to the control device as a response. 82. The recording / reproduction control method according to claim 81, wherein a reply is sent. 86. The control device acquires an identification number for designating attribute information of a file recorded on the recording medium and acquiring a part of the identification numbers from the recording / reproducing device. The recording / reproducing device issues a control command, and based on the identification number acquisition control command, the recording / reproducing device sends a partial identification number of the identification numbers of the files recorded on the recording medium to the control device as a response. 82. The recording / reproduction control method according to claim 81, wherein a reply is sent. 87. The control device issues a validity acquisition control command for acquiring a validity indication number indicating the validity of a file operation based on the identification number from the recording / reproducing device. 82. The recording / reproducing control method according to claim 81, wherein the validity instruction number is notified to the control device, and the validity instruction number is stored in a storage unit. 88. The recording / reproducing control method according to claim 87, wherein the recording / reproducing device determines whether or not the recording medium is correct based on the validity indication number. 89. The control device specifies the identification number and the validity indication number acquired by the acquisition means in response to a control command issued to the recording / playback device. 89. The recording / reproducing control method according to claim 88, wherein the validity instruction number notified from the control device is compared with the validity instruction number stored in the storage unit. 90. The recording / reproduction control method according to claim 87, wherein said recording / reproduction device generates said validity indication number. 91. The control device is connected to a printing device for printing various data, and causes the printing device to print a file recorded on the recording medium received from the recording / reproducing device. 82. The recording / reproduction control method according to claim 81, wherein: 92. The recording / reproduction control according to claim 81, wherein a file is recorded on the recording medium by a hierarchical file system defined by a design rule of camera file system. Method. 93. The digital serial bus interface comprises an IEEE 1394 high performance
82. The recording / reproduction control method according to claim 81, wherein the recording / reproduction control method conforms to a serial bus standard.