JPH05334852A - Method or device for recording data - Google Patents

Abstract

PURPOSE:To shorten the readout time by diminishing the number of access times for reading out data from an optical card having a file data area and a file management data area and diminishing the quantity of information to be read out of the file management data area. CONSTITUTION:This constitution is equipped with an optical pickup for recording data by projecting a light beam to the optical card, an intermediate file 24 for temporarily storing data to be recorded on the optical card and a file management system 22 for editing so as to be capable of continuously recording the optical card with the data stored in the intermediate file and data desirable to be written. After editing data by the file management system 22, the data is recorded on the above optical recording medium by the optical pickup.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for recording data on a recording medium such as a WROM type optical card or a data recording method.

[0002]

2. Description of the Related Art A conventional data recording device or method records data on an optical card having a data format as shown in FIG. The data format shown in FIG. 12 is composed of a file management data area in which file management data is recorded, a file allocation data area allocated when the program is executed, and a data area. When reading a file from the optical card, the file management data area and the file allocation area are read.

The data area has a data structure as shown in FIG. Data corresponding to each file is recorded for each sector. In FIG. 13, Fil
e1 is data corresponding to File1, File2 is F
The data corresponding to ile2 is shown. Since the recording of File 1 and File 2 is performed every time the data corresponding to each file is recorded, the data recording order is random. In the file management data area, file management data such as a file name, a file size, various attributes of the file, and an address of data corresponding to the file in the data area are recorded. As mentioned above, since the recording order of data is random,
Information indicating the start address (track) of the data corresponding to the file and the position of the sector is added to all the data.

For example, in FIG. 13, the file 1 file position information is (n: 0), (n: 1), (n:
3), (n + 1: 1), and (n + 2: 0). However, in the position information (n: 0), n indicates a track and 0 indicates a sector.

[0005]

In the conventional data recording apparatus or recording method, since the data recorded at random as described above is read, the number of times of accessing the data is increased and the position information of a large amount of file data is read. Therefore, there is a problem that it takes a lot of time.

The present invention has been made in consideration of the above points, and it is possible to shorten the read time by reducing the number of accesses for reading data and reducing the amount of information read from the file management data area. An object of the present invention is to provide a data recording device or a data recording method.

[0007]

A data recording device according to a first aspect of the present invention is an optical card reader as a data writing means for irradiating an optical card 1 as an optical recording medium with a light beam to record data. / Writer 25, an intermediate file 24 as an intermediate storage means for temporarily storing data to be recorded on an optical recording medium, and a file management system 2 as a data management means for editing the data stored in the intermediate storage means
2, and the data is recorded on the optical recording medium by the data writing unit after the data is edited by the data managing unit.

According to a second aspect of the present invention, there is provided a data recording method in which data to be recorded is temporarily stored in an optical card 1 as an optical recording medium, the temporarily stored data is edited, and then the edited data is optically stored. It is characterized by optically recording on a medium.

In the data recording method according to the third aspect, the optical card 1 as an optical recording medium has a data area and a file management area, and data relating to the contents of the file is recorded in the data area and the file is recorded. The feature is that the data to be managed is recorded in the file management area.

According to the data recording method of the fourth aspect, when the additional data is recorded on the optical card 1 as the optical recording medium, the data to be additionally recorded and the existing data read from the recording medium in advance are temporarily stored. After the stored additional data and existing data are edited, the additional and existing data are recorded on the optical recording medium.

[0011]

In the data recording apparatus according to the first aspect, the data to be written is stored in the temporary intermediate file 24, and the data temporarily stored in the file management system 22 is edited and then recorded in the optical card 1. The number of accesses and the amount of file management data can be reduced, and the read time can be shortened.

In the data recording method according to the second aspect, the data to be recorded is temporarily stored in the optical card 1, the temporarily stored data is edited, and then the edited data is optically stored in the optical storage medium. Since the data is recorded, the number of accesses and the amount of file management data can be reduced, and the read time can be shortened.

In the data recording method according to the third aspect, the data relating to the contents of the file is recorded in the data area, and the data for managing the file is recorded in the file management area. Therefore, the read time can be shortened.

In the data recording method according to the fourth aspect, when the additional data is recorded on the optical card 1, the data to be additionally recorded and the existing data previously read from the optical card 1 are temporarily stored and stored. After editing the additional data and the existing data, the additional data and the existing data are recorded in the optical card 1. Therefore, the number of times of access and the amount of file management data can be reduced, and the read time can be shortened.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the data recording apparatus and recording method of the present invention will be described below. FIG. 1 shows the configuration of an embodiment of an optical card as an optical recording medium of the present invention. In FIG. 1, an optical card 1 is a card-shaped optical recording medium and has a data recording area 2. As shown in the enlarged portion 3 in which the data recording area 2 is enlarged, tracks 4 are formed in the X direction. The recording pit 5 is optically recorded along the track 4.

FIG. 2 is a perspective view of a recording / reproducing mechanism for recording data on or reproducing data from the optical card 1. In the figure, the shuttle 11 mounts and fixes the optical card 1. The motor 13 is a drive source for driving the shuttle 11 in the X direction. The optical pickup device 12 irradiates the optical card 1 mounted and fixed on the shuttle 11 with a light beam to optically record or reproduce data. The motor 14 is a drive source that rotates the screw 15 to drive the optical pickup 12 in the Y direction.

When the optical card 1 is placed and fixed on the shuttle 11, the motor 13 rotates to drive the shuttle 11 in the X direction. At this time, the optical pickup 12 emits a light beam along the track 4 of the optical card 1 to record or reproduce data. When the shuttle 11 reaches the end of the recording area 2 of the optical card 1, the motor 14 rotates to move the optical pickup 12 in the Y direction so that the light beam moves to the adjacent track. In this way, data is recorded or reproduced on the optical card 1.

FIG. 3 shows a data format of the optical card 1 of the present invention. The recording area 2 of the optical card 1 is composed of three areas: a file management data area (1) where file management data is recorded, a file management data area (2) and a data area where data is recorded. When data is recorded on the optical card 1, the same data is recorded in both the file management data areas (1) and (2). The file management data area (2) is used as a backup when an error occurs in the file management data (1). The file management data areas (1) and (2) are allocated to 15 sectors / 1 track, and the data area is allocated to 4 sectors / 1 track.

FIG. 5 shows the data format of the file management data areas (1) and (2). In the figure, IDX0 indicates a serial number that is incremented each time file management data is recorded. IDX
Reference numeral 1 is an identifier indicating the type of file management data, that is, file data or error data. The file data is, for example, file name, file version (a flag that is incremented each time a file is recorded with the same file name), file creation date and time, file size, and data start / end address. The error data is the data of the track address where the error occurred, and is generated when the error occurs when the file is recorded.

FIG. 6 shows a data structure when the file management data block of the format shown in FIG. 5 is recorded in the file management data areas (1) and (2). This figure shows a state in which the same 20 file management data are recorded in the file management areas (1) and (2). The number written in each file management data area indicates the value of IDX0.

Now, the file management data is read from the optical card 1, and the file management data area (1),
It is assumed that an error occurs in the file management data of IDX0 = 17 in the file management data area (1) while the final address of (2) is recognized. When an error occurs, the data of the same IDX0 (= 17) is recorded on the next track in the file management data areas (1) and (2).

The data in the file management data area (1) is read from the beginning. If IDX0 overlaps, the data read later is given priority. Also, IDX0
File management data area (2) when omission occurs
The data of the same IDX0 is read.

FIG. 7 is a block diagram showing the concrete construction of an embodiment of the data recording apparatus of the present invention. In the figure, an application 21 is program software for instructing recording / reproduction of data. The optical card reader / writer 25 optically records and reproduces data on the optical card 1. The memory 23 stores the file management data read from the optical card 1. The intermediate file 24 temporarily stores the data sent from the application 21 and the data from the optical card reader / writer 25. The file management system 22 edits the data temporarily stored in the intermediate file 24.

Based on the above configuration, the operation will be described with reference to the flow charts of FIGS.
First, the case of opening a file will be described with reference to FIG. When the write command is output from the application 21 (step S1), the file management system 22 searches for predetermined file management data already stored in the memory 23 (step S2). As a result of this search, if the file exists (step S3), the data corresponding to the file is read from the optical card 1 based on the management data of the file and temporarily stored in the intermediate file 24 (step S6). If the predetermined file does not exist in step S3, a fictitious intermediate file is created (step S7). The identifier of the file recorded in the intermediate file 24 is returned to the file management system 22 (step S9).

On the other hand, in step S1, the application 2
When the read command is output from 1, the file management system 22 searches for predetermined file management data already stored in the memory 23 (step S4). As a result of this search, if the file exists (step S5), an identifier of the file to be read by the optical card 1 is created (step S8), and this identifier is returned to the file management system 22 (step S10). If the file does not exist in step S5, there is no data to be read from the optical card 1, so an error is returned to the file management system 22 (step S11).

In this way, the file is opened. After that, as shown in FIG. 9, a write process of storing data in the intermediate file 24 is performed. Or FIG.
As shown in, read processing is performed to read data corresponding to the file of the file management data from the optical card 1.

Next, the case of closing a file will be described with reference to FIG. If it is a read command (step S41), the file management system 22 edits the data stored in the intermediate file 24 and the data to be newly recorded and records it in the data area of the optical card 1 (step S42). This edit, as shown in Figure 4,
The data of the file to be recorded is edited so as to be continuously recorded on the optical card 1. Next, file management data regarding the file is created and recorded in the file management data areas (1) and (2) of the optical card 1.
In the case of FIG. 11, the start address and the end address of this file management data need only be data of (n: 0) and (n + 1: 0). After the file management data and the file data are recorded on the optical card 1, the data stored in the intermediate file 24 is deleted (step 4
5) Close the file.

In the case of a write command in step S41, the work area for reading file data from the optical card 1 is opened (step S43) and the file is closed.

According to this data recording device or recording method, even when the additional data is recorded on the optical card 1, the data to be additionally recorded and the existing data previously read from the optical card 1 are temporarily stored in the same manner. After editing the stored additional data and existing data, the additional and existing data can be recorded in the optical card 1.

[0030]

According to the data recording apparatus of the first aspect,
The data to be written is stored in the temporary intermediate file 24, and the data temporarily stored in the file management system 22 is edited and then recorded in the optical card 1.

In the data recording method according to the second aspect, the data to be recorded is temporarily stored in the optical card 1, the temporarily stored data is edited, and the edited data is optically stored in the optical storage medium. Record.

Further, in the data recording method according to the third aspect, the data relating to the contents of the file is recorded in the data area, and the data for managing the file is recorded in the file management area.

Further, in the data recording method according to the fourth aspect, when the additional data is recorded on the optical card 1,
The data to be additionally recorded and the existing data read from the optical card 1 in advance are temporarily stored, and after the stored additional data and the existing data are edited, the additional and existing data are recorded in the optical card 1. The amount of file management data can be reduced, and the read time can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view showing a specific configuration of an embodiment of an optical card of a data recording device of the present invention.

FIG. 2 is a perspective view showing a specific configuration of an example of a recording / reproducing mechanism of the data recording apparatus of the present invention.

FIG. 3 is a data structure diagram of the data format of the optical card of the data recording method of the present invention.

FIG. 4 is a data structure diagram of a data area of the optical card of the data recording method of the present invention.

FIG. 5 is a data structure diagram of file management data of the optical card of the data recording method of the present invention.

FIG. 6 is a data structure diagram of file management data areas (1) and (2) of the optical card of the data recording method of the present invention.

FIG. 7 is a block diagram showing a specific configuration of an embodiment of the data recording apparatus of the present invention.

FIG. 8 is a flowchart for opening a file of the data recording method of the present invention.

FIG. 9 is a flowchart for writing a file in the data recording method of the present invention.

FIG. 10 is a flowchart for reading a file according to the data recording method of the present invention.

FIG. 11 is a flowchart for closing a file of the data recording method of the present invention.

FIG. 12 is a data structure diagram of a data format of an optical card of a conventional data recording method.

FIG. 13 is a data structure diagram of a data area of an optical card according to a conventional data recording method.

[Explanation of symbols]

 1 Optical Card (Optical Recording Medium) 12 Optical Pickup 21 Application 22 File Management System (Data Management Means) 23 Memory 24 Intermediate File (Intermediate Storage Means) 25 Optical Card Reader / Writer (Data Writing Means)

Claims (4)

[Claims] 1. A data writing unit for irradiating an optical recording medium with a light beam to record data, an intermediate storage unit for temporarily storing data to be recorded on the optical recording medium, and a storage unit for storing the intermediate storage unit. Data management means for editing the created data, wherein the data is recorded on the optical recording medium by the data writing means after the data is edited by the data management means. Recording device. 2. Data characterized by temporarily storing data to be recorded on an optical recording medium, editing the temporarily stored data, and optically recording the edited data on the optical storage medium. Recording method. 3. The optical recording medium has a data area and a file management area, data relating to the contents of a file is recorded in the data area, and data for managing the file is recorded in the file management area. The data recording method according to claim 2, wherein 4. When recording additional data on the optical recording medium, the data to be additionally recorded and existing data read in advance from the recording medium are temporarily stored, and the stored additional data and existing data are stored. 4. The data recording method according to claim 2, wherein the additional and existing data are recorded on the optical recording medium after editing.