JPS5928246A - Optical disk processor - Google Patents

Abstract

PURPOSE:To continue the processing despite an ID error and to continue the normal data processing even with a high error factor of a medium, by writing previously the information same as an ID part to a data part added with an error detection correcting code. CONSTITUTION:The data is requested to an upper rank device 11 when the coincidence is obtained for track addresses after searching an ID part in a data writing mode. A control part 14 performs the following control. That is, the data same as the ID part is written to a data part by an ID writing circuit 16, and then the data given from an upper device 1 is written via a data transfer circuit 12. Then an ID and an error detection correcting code including the data are generated by an error detection correcting code generating circuit 13 and then written. In such a way, the data is written on a medium 23. When the data is read, the ID part is read. In case a reading error arises in the track address in the ID part, the ID part is read. Then a desired sector address is detected if the ID information, i.e., the track address of the data part is read normally. Then the data is sent to the device 11 in the form of a normal data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disk processing apparatus, and more particularly to an optical disk processing apparatus with a high data reading rate.

Conventionally, this type of optical disk processing device stopped processing further data when an error occurred in the ID address indicating the physical address of data on the medium, but compared to conventional magnetic disk media, optical disk media are The error rate of the medium is high, and adding all the complicated error correction codes to the ID section requires a large amount of hardware and is difficult to implement.

Therefore, this optical disk processing apparatus has the disadvantage that the data of the ID address often cannot be recognized properly, resulting in a lack of reliability in data processing.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate these conventional drawbacks and provide an optical disk device that is highly reliable in data processing.

According to the present invention, there is provided a means for writing all of the same information as a pre-written ID indicating a physical address on a medium, a circuit for generating an error correction code including the ID part and data, and a circuit for generating an error correction code including the ID part and data; , a circuit that corrects errors including the ID part written as data, a circuit that detects the 7t ID part written as data, and a circuit that detects the 7t ID part written as data and is preformatted so that the ID in the data part can be read normally regardless of errors in the ID part. Thus, an optical disk processing apparatus is obtained, which is characterized in that it has a control means for continuing the bladder removal operation normally.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an optical disk device which is an embodiment of the present invention. In FIG. 1, this embodiment includes a data transfer circuit 12 that sends and receives all data from a host device 11, and an I that writes ID'i.
The D write circuit 16, the circuit 13 that generates all correction codes including all ID and data, the data from the data transfer circuit 12, the ID from the ID write circuit 16, and the data from the error correction code generation circuit 13. A selection circuit 20 for sending to a switching optical disk medium and an optical disk medium 13.
and a circuit 15 for notifying a control circuit 14 by a microprocessor whether or not there is a data error when reading data. The microprocessor 14 is connected to an ID write circuit 16, which is connected to an error correction code generating circuit 13 and a selection circuit 18. This selection circuit 18 is configured to send one of the data from the data transfer circuit 12 and the error correction code from the error correction code generation circuit 13 to the modulation circuit 20. The modulation circuit 10 converts the data into modulation data corresponding to the recording medium and supplies it to the original disk medium 23 via the read/write control circuit 22. The read/write control circuit 22 supplies data from the optical disk medium 23 to the read buffer circuit 19 through the entire demodulation circuit 21.

The error correction/detection circuit 17 corrects data errors during reading supplied to the read buffer circuit 19, sends the data to the host device 11 via the all-data transfer circuit 12, and also supplies it to the all-error notification circuit 15. .

FIG. 2 shows a formatter on an optical disc medium written according to this embodiment. In FIG. 2, the format on the optical disk medium is a pregroup with a PLL synchronization byte 31 when writing data, a synchronization byte 32 called an ID synchronization byte, and a T fC byte indicating the physical track address of the optical disk medium. 33 and a byte 34 for indicating the physical sector address, and a synchronization byte 32. The pID part is composed of the tiger and quad addresses 33 and the sector address 34, and these bytes 31 to 3
4 is preformatted. Furthermore, the format on the optical disk medium includes data 35 for PLL synchronization, a synchronization byte 36 called a data synchronization byte, an area with the same contents as the physical track and quad address 33 of the optical disk medium, and an ID section. Track address 37 and IDff1
It has the same address 38 as the sector address of S, and also has fixed length data 39 and an error detection and correction code 40. Fixed length data 39 and error detection and correction code 40 constitute pD&'1 part.

Next, in this embodiment, the operation of writing and reading all data on the medium preformatted in the recording formation shown in FIG. 2 will be explained. When writing data for the first time, this embodiment uses a known method to check the QID ID section and, when the track and quad addresses match, requests the data from the host device. Although the control circuit 14 is not specifically shown,
The same data 'i as the ID part is written into the data part by the ID write circuit, and then the data from the host device 1 is controlled to be written via the entire data transfer circuit 2. Next, the control circuit 14 generates an error detection and correction code including the ID and data by a total error detection and correction code generation circuit,
This error detection and correction code is controlled to be completely written. In this manner, the present disk processing device writes data on the medium 23 in the format shown in FIG. This embodiment also searches the ID section when reading data money, but as shown in the operation flow of Fig. 3, the ID section including money read % ID
When a read error occurs in the data section address, the ID information in the DATA section is read after reading the ID section without reporting the error status to the host device. If the ID information in the DATA section can be read normally, the target sector address is detected and the data is sent to the host device as normal data after checking the error correction. Furthermore, since the error rate of the ID in the DNTA section has been improved by an error correction code, there are far fewer reading errors than blanking errors in the ID section.
Even if an error occurs in the ID section, the reading operation can be executed normally.

As explained above, in the present invention, by writing the same information as the ID part into the data part to which an error detection and correction code is added, even if an error occurs, processing can be carried out more efficiently, and the error rate of the medium can be reduced. Despite being expensive, it has the effect of allowing data processing to continue normally.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the present invention, 11.
...Host device, 12...Data transfer circuit, 13...Error correction code generation circuit, 14.
...Material 7-microprocessor, 15...error notification circuit,
16...ID1i: Including circuit, 17...
Error correction & confusion. -8-,,.

Claims (1)

[Claims] means for writing the same information as a pre-written ID section indicating a physical address on a medium into a data section; a circuit for generating an error correction code including the m section and data; and when reading the data; There is a circuit that corrects errors including the ID written in the data section, a circuit that detects the ID written as data, and a circuit that corrects the ID in the data section, regardless of errors in the preformatted ID section. 1. An optical disk processing device comprising: control means for continuing the reading operation normally if the reading is possible.