JPH0240711A - Optical disk driver - Google Patents

Abstract

PURPOSE:To correct data on an optical disk efficiently at low cost by storing correction data and its address data of the optical disk in a storage means and reading the out at a read request based upon the coincidence of the address data. CONSTITUTION:When a request to correct data is sent to an input/output part 1 from external equipment and the kind of the disk and correction and address data are inputted, they are stored in the storage part 3 through a control part 2. Then when the request to read the data and its specified address data are inputted from outside, the control part 2 compares the disk kind data read out by a read part 4 with that in the storage part 3 and further compares the address data when they does not match, but outputs the correction data from the storage part 3 when not. When either one does not match, the data of the optical disk 5 is outputted. Thus, the correction data is read out of the storage part 3 and data is corrected efficiently at low cost.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an optical disc drive.

(Prior Art) An optical disk drive device reads data from an attached optical disk and sends the data to an external device such as a computer.

Data cannot be modified on a read-only optical disc, and a new optical disc must be created in order to modify the data.

If you do not create a new optical disk, you must create correction data on the application program of an external device such as a computer, and when using the correction data, you must read the correction data of the application program without reading it from the optical disk. .

Furthermore, if a large number of applications use one optical disc, it is necessary to create correction data for all applications. In any case, there were problems of high cost and low efficiency.

(Issue 8 to be solved by the invention) In conventional optical disc drives, when modifying data on a read-only optical disc, it is necessary to create a new optical disc or create a modification program for all applications that use the optical disc. However, there have always been problems with high costs and poor efficiency.

The present invention has been made in view of the above problems, and an object thereof is to provide an optical disk drive device that can efficiently read corrected data from an optical disk at low cost.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a reading means for reading out data from an optical disk storing data based on address data, storage means for storing correction data for the data and first address data corresponding to the correction data; second address data inputted by the input means and the first address data stored in the storage means; If the comparison result of this comparison means matches, the correction data stored in the storage means and corresponding to the first address data is outputted, and if the comparison result does not match, the correction data of the second address data is outputted. and output means for outputting data read from the optical disc based on address data of the optical disc.

(Operation) In the present invention, in order to modify data on an optical disc, modified data and first address data related to the modified data are input to the input means and stored in the storage means. Next, in order to read data from the optical disc, second address data is input to the input means and sent to the comparison means. The comparison means compares the second address data with the first address data stored in the storage means, and if the comparison result matches, the second address data stored in the storage means and the first or second address data are stored in the storage means.
Corrected data corresponding to the second address data is output to the output means, and if the result of the comparison does not match, data stored on the optical disk and corresponding to the second address data is read by the read means and output to the output means. be done.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing the configuration of an optical disk drive device according to an embodiment of the present invention, and this optical disk drive device is composed of an input/output section 1, a #J control section 2, a storage section 3, and a reading section 4. Ru.

An input/output section 1 serving as an input means and an output means receives data necessary for reading or modification from an external device such as an electronic computer, and sends the data to the control section 2. The input/output section 1 also outputs data sent from the control section 2 to an external device such as a computer. The storage unit 3 stores disc type data for which correction is requested, correction data input via the input/output unit 1, and address data specifying the storage location of the correction data.

The disc type data is data for specifying the type using a part of the storage area of the optical disc 5, and data unique to the optical disc used may be used. For example, C
D-ROM (Compact Disc Read
0nly Memory), TOC (Table
Of'Contents) information can be used as disc type data. Furthermore, for an optical disc that does not have ToC information, data such as address "0" may be used as the disc type data. Other than the above two examples, the optical disc data before modification can be used if it can be distinguished from data on other optical discs.

Data and disc type data are stored on the optical disc 5 , and the reading unit 4 reads out the data and disc type data stored on the optical disc 5 and sends it to the control unit 2 . In addition to controlling each section, the control section 2 functions as a comparing means, and compares the disc type data read by the reading section 4 and the disc type data stored in the storage section 3. If they match, the address data specifying the read data inputted from the input/output section 1 is further compared with the address data specifying the modified data stored in the storage section 3.

Next, the operation of this embodiment will be explained according to the flowchart shown in FIG.

When a command is received by the input/output unit 1 from an external device such as a computer (step 201), and the command is a data modification request (step 202), the disk type data is sent from the external device such as a computer to the input/output unit 1. , modified data, and address data specifying the modified data are input (step 203) and stored in the storage section 3 through the control section 2 (step 204).

Next, when a data read request and address data specifying the read data are input to the input/output section 1 from an external device such as a computer (step 205.20B), the read section 4 receives the disk type data of the optical disk 5 loaded. is read from the optical disc 5 and sent to the control unit 2 (step 207). The control unit 2 compares the disc type data read by the reading unit 4 and the disc type data stored in the storage unit 3 (step 208), and if they match, specifies further input read data. The address data is compared with the address data stored in the storage unit 3 specifying the corrected data (step 209).

If the address data match, the control unit 2
The corrected data specified in the address data is read out from the address data (Step 210), and outputted to the input/output unit 1 and transferred to an external device such as a computer (Step 211).

If the disc type data read by the reading unit 4 and the disc type data stored in the storage unit 3 do not match (step 208), or if the disc type data match but the address data specifying the read data If the address data specifying the correction data stored in the storage unit 3 do not match (step 209), the control unit 2 reads the data specified by the address data from the optical disc 5 by the reading unit 4 (step 212).
, and is output to the input/output unit 1 and transferred to an external device such as a computer (step 211).

If a command other than a data modification request or read request is input to the input/output unit 1 from an external device such as a computer, processing according to the command is performed (step 21
3).

Thus, in this embodiment, the modified data is stored in the storage section 3, and when a request to read the modified data is made, the modified data is read out from the storage section 3 rather than from the installed optical disk 5 or the application. , data can be modified efficiently at low cost without creating a new optical disc or creating modification data for each application.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an optical disc drive device that can read corrected data from an optical disc at low cost and with high efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an optical disc drive device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of this embodiment. 1... Input/output unit, 2... Control unit, 3... Storage unit,
4...Reading unit, 5...Optical disc applicant Toshiba Corporation

Claims (1)

[Scope of Claims] Reading means for reading data from an optical disk storing data based on address data, and storing correction data for the data stored on the optical disk and first address data corresponding to the correction data. a storage means; a comparison means for comparing the second address data inputted by the input means with the first address data stored in the storage means; and if the comparison results of the comparison means match; Output means for outputting corrected data stored in the storage means and corresponding to the first address data, and outputting data read from the optical disc based on the second address data if the comparison results do not match; An optical disc drive device comprising: