JPH11120043A - Data managing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time needed to divide a data file. SOLUTION: First management information 40 showing a 1st data file consisting of data blocks is read out and 2nd management information 41 showing a 2nd data file consisting of at least some of the data blocks of the 1st data file is generated; and at least some of pieces 5 and 6 of address information of the 1st management information 40 is moved to obtain pieces 5 and 6 of address information of the 2nd management information. Consequently, at least some of the data blocks of the 1st data file are data blocks of the 2nd data file.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a data management method for managing data of an image captured by a camera device by changing management information including address information and the like.

[0002]

2. Description of the Related Art Conventionally, image data representing an image picked up by, for example, a digital still camera device is stored in a predetermined capacity on a recording medium such as an optical disk.
This optical disk has a data area in which a plurality of image data are stored, and a management area in which management information for managing the image data stored in the data area is stored. These image data form a data file as a data block having a predetermined capacity.
In other words, the optical disk stores a plurality of data files composed of a plurality of data blocks and management information indicating the data files.

Here, at least a part of the plurality of data blocks 1 to 6 constituting the first data file constitutes a second data file, and the first data file is constituted by the first data file.
An example in which the data file is divided into the data file and the second data file will be described.

Conventionally, when dividing a first data file, first, the first management information 100 shown in FIG. 7A and the first data file indicated by the first management information 100 are read from an optical disk. put out. The first management information 100 has address information indicating an address of a data block constituting the first data file, and file name information 102 indicating a file name of the first data file.

Here, when the data blocks belonging to the first data file corresponding to the addresses 5 and 6 of the first management information are to be the data blocks constituting the second data file, the first data file must be The data blocks corresponding to addresses 5 and 6 are read out of the stored data blocks. Then, the data block read from the optical disk is temporarily stored in the memory.

Next, as shown in FIG. 7B, second management information 110 indicating a second data file for storing data blocks corresponding to addresses 5 and 6 of the first data file. Is created in the memory.

Next, an address for writing the data blocks corresponding to the addresses 5 and 6 as the second file data to the optical disk is created. Here, the address 7 and the address 8 are written in the address information of the second management information 110 on the memory.

Next, as shown in FIG. 7C, the address information of the address 5 and the address 6 of the first management information 100 is deleted on the memory.

The data blocks corresponding to the addresses 7 and 8 stored in the memory and the first
By writing the first management information 100 and the second management information 110 to the optical disc,
The first data file including the data blocks corresponding to the first to fourth addresses is stored in the first to fourth addresses of the first management information 100.
Is divided into a first data file composed of data blocks corresponding to the first data file and a second data file composed of data blocks corresponding to the addresses 7 and 8 of the second management information 110.

As a conventional data management method, FIG.
9 shows an example when deleting the small image data 1, for example.
When the small image data 1 is deleted in this way, the small image address 1 stored in the small image management information 150 is also deleted.

At this time, in the conventional data management method, first, in the small image management information 150 shown in FIG.
Small image addresses 2 to 8 and these small image addresses 2 to 8
Are read from the optical disk and temporarily stored in the memory. Next, in the conventional data management method, as shown in FIG. 8B, the small image addresses 2 to 8 once stored in the memory in the above process are written in the small image management information 150 onto the optical disk, and the small image addresses are written. The small image data 1 is deleted by writing the image data 2 to 8 corresponding to 2 to 8 on the optical disk.

[0012]

By the way, in the above-described data management method, of the data blocks stored in the first data file, the data blocks stored in the second data file are read and written. There is a need.

However, in such a method, when dividing a data file, it is an essential condition to read and write the data blocks. Therefore, it takes time to read and write the data blocks constituting the first data file. Will take. Further, if the capacity of the data blocks constituting the first data file is increased, this problem becomes more remarkable.

In the data management method described above, when the small image data 1 is deleted, the small image data 2 to 8 are temporarily read out from the optical disk to the memory, and are deleted.
It is necessary to perform the operation of writing 8 and it takes time to read and write.

Accordingly, the present invention has been proposed in view of the above-described circumstances, and has as its object to provide a data management method capable of shortening the time required for dividing a data file. I do.

[0016]

A data management method according to the present invention for solving the above-mentioned problems reads first management information indicating a first data file composed of a plurality of data blocks, and reads the first data file. Creates the second management information indicating the second data file composed of at least a part of the data blocks, and moves at least a part of the address information of the first management information to create the second management information. , At least a part of the data block of the first data file is used as the data block of the second data file.

In such a data management method, the first data file can be divided into the first data file and the second data file by changing only the management information as described above.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data management method according to the present invention will be described below with reference to the drawings.

This data management method can be applied to, for example, a data recording / reproducing apparatus that captures a still image and generates a data block composed of image data of a predetermined capacity.

A data recording / reproducing apparatus 1 to which the data file management method can be applied is, for example, as shown in FIGS. 1 and 2, a disk drive which stores an optical disk 20 and writes and reads data on and from the optical disk 20. 2 and disk I / F (interface) 3
And a CPU (Central Processing Unit) as control means for controlling the disk drive 2, the disk I / F 3, etc.
nit) 4.

The data recording / reproducing apparatus 1 includes a CPU 4
ROM (Read Only Memor)
y) 5 and a DRAM (Dynamic
Random Access Memory) 6 and keyboard 7 for operation
A key I / F (interface) 8 for supplying a signal input from a keyboard 7 onto a bus; and a VRAM (Video Random Access Memory) 9 for recording image data.
And a monitor 10 for displaying an image. In the data recording / reproducing apparatus 1, the CPU 4, ROM 5, DRA
M6, disk I / F3, key I / F8, VRAM9
However, signals are mutually transmitted and received via a bus.

As shown in FIG. 2, the optical disk 20 is provided with a data area 21 for recording a plurality of data blocks, and is provided on the inner side of the data area 21 and is recorded on the data area 21. A management area 22 for recording management information of the data block is provided. The management information recorded in the management area 22 includes, for example, data file information 22a indicating a data file name of a data file storing the data block and address information 22b indicating an address of each data block.

The address information 22b is, for example, as shown in FIG.
As shown in (a), the address of each data block stored in the data area is shown, which has a so-called link structure. That is, in the address information 22b shown in FIG. 3A, the address indicating the data block 1 is stored in the address 1, and the data block 2 is stored in the address 2.
Is stored, and an address indicating the data block 3 is stored in the address 3.

The address information 22b has a so-called tree structure, for example, as shown in FIG. 3 (b). Indirect addresses 22c are stored at each address 1 to 6, and each address of the indirect block 22c is stored. An address indicating each data block may be stored in 1 to 10.

Further, the address information 22b has a so-called tree structure, for example, as shown in FIG.
The primary indirect block 22c is stored at each address 1 to 6,
Each address 1 to 10 of the primary indirect block 22c has 2
The next indirect block 22d may be stored. And
The address information 22b may store an address indicating each data block in each address 1 to 10 of the secondary indirect block 22d.

On the other hand, the data area stores a plurality of data blocks for each data file. This data block is information of a predetermined capacity indicating, for example, one still image.

Next, each component of the data recording / reproducing apparatus 1 will be described.

The program of the CPU 4 is stored in the ROM 5. The DRAM 6 is a variable area for the CPU 4 and temporarily stores data or programs.

The disk I / F 3 is an interface between the CPU 4 and the disk drive 2. In this embodiment, the optical disk 20 is housed in the disk drive 2, and data input via the disk I / F 3 at the time of data recording is written on the optical disk 20 by the disk drive 2. The data recording / reproducing device 1
In, data read from the optical disk 20 by the disk drive 2 at the time of data reproduction is supplied to the VRAM 9 and the like via the disk I / F 3.

The keyboard 7 is operated by a user, for example, and sends a signal corresponding to the operation to the key I / F 8.
The key I / F 8 supplies a signal from the keyboard 7 onto the bus.

The VRAM 9 is a memory for storing image data of an image displayed on the monitor 10. In the data recording / reproducing apparatus 1, for example, when image data is recorded on the optical disk 20, the image data is read by the disk drive 2 when reproducing the optical disk 20, and is read via the disk I / F 3 and the VR via the bus.
The image data supplied to the AM 9 and stored in the VRAM 9 is displayed on the monitor 10 as a still image or a moving image.

The CPU 4 controls each unit constituting the data recording / reproducing apparatus 1. For example, when dividing a certain data file, the CPU 4 executes the program stored in the ROM 5.

Next, an example of managing data stored on the optical disk 20 using the above-described data recording / reproducing apparatus 1 will be described.

As shown in FIG. 4, the data recording / reproducing apparatus 1 reads the first management information 40 indicating the first data file to be divided, and reads a plurality of pieces of data constituting the first data file. Second management information 41 indicating a second data file composed of a part of the data block
Is created, and a part of the address information 4 of the first management information 40 is created.
0a is moved to the address information 41a of the second management information 41.

That is, in the data recording / reproducing apparatus 1, first, the first data file indicated by the first management information 40 is transmitted from the keyboard 7 to the first data file and the second data file.
Is input to the CPU 4 via the key I / F 8. Then, the CPU 4 to which such an input signal has been input activates the data management program stored in the ROM 5. And
In the CPU 4, as shown in FIG.
The first management information 40 indicating the first data file to be divided and stored in the management area 22 is read from the optical disk 20 stored in the disk drive 2. Then, the CPU 4 temporarily stores the first management information 40 in the DR.
Store it in AM6.

Next, as shown in FIG. 4B, the CPU 4 comprises a part of the plurality of data blocks constituting the first data file in accordance with the data management program fetched from the ROM 5. Second
The second management information 41 indicating the data file of the
Create on 6.

Next, in the CPU 4, as shown in FIG. 4C, the address 4 and the address 5 of the first management information 40 are set.
Is read from the DRAM 6 and the first management information 41
The address 5 and the address 6 of the management information 40 are written. Thus, the second data file has the address 5
And the data block indicated by the address 6.

At this time, the CPU 4 deletes the address 5 and the address 6 of the first management information 40 stored in the DRAM 6 so that the data block corresponding to the address 5 and the address 6 is deleted from the first data file. It has been deleted.

As described above, in the data recording / reproducing apparatus 1, a part of the addresses 5, 6 of the first management information 40 is changed to the second address.
By moving the data blocks to the addresses 5 and 6 of the management information 41, a part of the plurality of data blocks constituting the first data file can be used as the data blocks constituting the second data file. Therefore, in the data recording / reproducing apparatus 1, when the first data file is divided by moving the data block so that the first data file becomes the first data file and the second data file, as in the related art, The data file can be divided without reading the stored data block, storing the data block again in the second data file of the optical disc 20, and dividing the data file. Therefore, according to the data recording / reproducing apparatus 1, the data file can be divided in a shorter time as compared with the related art.

The data recording / reproducing apparatus 1 sometimes manages a data block composed of small image data. This small image data is stored in the monitor 1 for image selection, for example.
Used to display 0. The small image management information 50 for managing the small image data indicates a data file composed of the small image data as shown in FIG. The small image management information 50 includes file information and address information indicating small image addresses 1 to 8 corresponding to the small image data 1 to 8, respectively.

The small image data 1 to 8 have a capacity of about half of each address indicating each data block described above, and are handled as one data block by two small image data. That is, in the operation of the data recording / reproducing apparatus described above, the first data file is divided and the first data file is divided.
In this case, the data file and the second data file can be divided only for each data block.

When such small image data 1 is deleted, the data recording / reproducing device 1 first stores the CPU 4 in the first small image management information 50 indicating the first data file as shown in FIG. Performs the same processing as the processing shown in FIG. That is, in the data recording / reproducing apparatus 1, the first data file indicated by the first small image management information 50 is divided into the first data file 50 and the second data file 50a. By performing such processing, a first data file including the small image data 1 and 2 and a second data file including the small image data 3 to 8 are created. At this time, as shown in FIG. 6B, the first small image management information 50 includes first small image management information 50 including addresses 1 and 2 and second small image management information 50 including addresses 3 to 8. It is divided on the DRAM 6 into management information 50a.

Next, when the small image data 1 is deleted from the first data file, the first small image management information 50 is deleted from the first small image management information 50 as shown in FIG. Address 1 is deleted. At this time, the CPU 4
Then, the small image data 2 corresponding to the first small image management information 50 and the address 2 is read from the optical disc 20 and is
The first small image management information 50 stored in the DRAM 6 is temporarily stored in the DRAM 6, and the small image data 2 corresponding to the address 2 and the address 2 of the first small image management information 50 stored in the DRAM 6 are written in the first small image management information 50 of the optical disc 20. Write 2 In the data recording / reproducing apparatus 1, by performing such processing, the first image storing small image data 1 to 8 is stored.
Can be a first data file composed of small image data 1-2 and a second data file composed of small image data 3-8.

In the data recording / reproducing apparatus 1 as described above, after each small image data is divided for the first data file and the first management information, the small image data smaller than one data block and Since the address is deleted, the image data can be deleted at a higher speed as compared with the conventional image data deletion. That is, in the data recording / reproducing apparatus 1 described above, since the data file is divided within a range that can be handled in units of one data block, the amount of data read from and written to the optical disc 20 can be reduced, and the time for deleting small image data can be reduced. Can be shortened.

[0045]

As described above in detail, the data management method according to the present invention, when dividing a data file composed of data blocks, reads out the first management information indicating the first data file, Creating second management information indicating a second data file in which at least a part of the data blocks of the first data file is stored, and moving at least a part of the address information of the first management information to create a second management information.
Since at least a part of the first data file is a data block of the second data file by using the address information of the management information of the first data file, the amount of data for reading and writing the data block when dividing the first data file is reduced. Can be reduced. Therefore, according to this data management method, it is possible to move a data block without reading and writing a data block corresponding to the address information together with the address information as in the related art. It is possible to reduce the time required to move data and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a data recording / reproducing apparatus to which a data management method according to the present invention can be applied.

FIG. 2 is a diagram showing an example of an optical disk having a data area and a management area.

3A and 3B are diagrams illustrating management information stored in a management area of the optical disc, wherein FIG. 3A is a diagram illustrating an example of a link structure, FIG. 3B is a diagram illustrating an example of a tree structure, and FIG. () Is a diagram showing another example of a tree structure.

4A and 4B are diagrams illustrating an example of a data management method according to the present invention, in which FIG. 4A illustrates an example of first management information corresponding to a first data file, and FIG. FIG. 9C is a diagram showing an example when the second management information corresponding to the data file No. 1 is created. FIG. 9C shows the case where the address 5 and the address 6 of the first management information are moved and the first management information is used as the second management area.
FIG. 6 is a diagram showing an example when dividing the data file of FIG.

FIG. 5 is a diagram showing a relationship between small image management information and small image data corresponding to an address of the small image management information.

6A and 6B are diagrams illustrating another data management method according to the present invention, wherein FIG. 6A is a diagram illustrating an example of first small image management information corresponding to a first data file, and FIG. This is an example when the first small image management information is divided to create the second small image management information corresponding to the second data file,
FIG. 9C is a diagram illustrating an example when a part of the first small image management information is deleted.

FIG. 7 is a diagram showing an example of a conventional data management method;
FIG. 7A is a diagram showing first management information, and FIG. 8B is a diagram showing data blocks corresponding to addresses 5 and 6 in a second
(C) is a diagram showing an example when addresses 5 and 6 of the first management information are deleted.

FIGS. 8A and 8B are diagrams illustrating an example of deleting a part of small image management information in a conventional method, where FIG. 8A is a diagram illustrating an example of small image management information, and FIG. It is a figure showing an example when a part of information is deleted.

[Description of Signs] 20 Optical Disk

Claims (5)

[Claims] 1. A management system comprising: a plurality of data blocks constituting a data file; data file information indicating a file name of the data file; and address information of each data block constituting the data file. In the data management method for managing the data blocks stored in the recording medium, a first management information indicating a first data file including a plurality of data blocks is read, and at least a part of the first data file is read. Creating the second management information indicating the second data file composed of the data blocks of the above, and moving at least a part of the address information of the first management information to move the address of the second management information. The information is used to convert at least a part of the data blocks of the first data file into the second data file. A data management method characterized by using data blocks as data blocks. 2. The data management method according to claim 1, wherein said data block is image data having a predetermined capacity. 3. The data management method according to claim 1, wherein the data block is small image data for selecting an image. 4. The data management method according to claim 1, wherein said management information has a link structure. 5. The data management method according to claim 1, wherein the management information has a tree structure.