JPS63237264A - Information recording system - Google Patents

Abstract

PURPOSE:To shorten a checking time by reading information from an optical disk while information which is before written is compared and checked. CONSTITUTION:At the time of reading after writing, write data for one track is transmitted to an optical driving device through a write circuit and information are stored in an RD sector buffer 63 from the optical driving device in order from the O sector of the track in a next rotation. On the other hand, information equivalent to that on the reading sector are stored from the data buffer to a WR sector buffer 52. While information are stored in respective buffer 63 and 52, instruction signals 16 and 17 fetch information 14 and 15 to be compared to a data conveyor circuit 11 so as to execute conveyance. With the data conveyance check, the number of error areas and the number of continuous bytes at every number of one error are counted. If the number of error areas or the number of error bytes are more than a prescribed value when data conveyance for one sector is terminated, data stored in the buffer 52 is rewritten in an alternation area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording method, and in particular to an information recording method and an information recording method effective for an optical disc control device that has a replacement area for a recording failure area on a recording medium. Concerning recording and reproducing methods.

[Conventional technology]

In conventional devices, the decision to rewrite to a spare area is made based on the number of errors based on an error check code (ECC). However, no consideration was given to the processing time. Incidentally, this type of technique is disclosed in Japanese Patent Application Laid-Open No. 59-94245.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology rewrites the original information in the spare area and uses the 5-decision KECC.

However, no consideration was given to the check processing time. In the above case, there is a problem in that it takes time for the ECC correction circuit to determine the defective area, and the determination that the area is a write defective area is made one sector after the read sector.

An object of the present invention is to perform the determination of a writing defective area simultaneously with the reading operation of data on a medium. [Means for solving the problem] This is achieved by carrying out a conveyor.

[Effect]

The check of the present invention performs a read check at the time of reading, reading, and writing while reading information from an optical disk.
It operates in step 5 to check the information and conveyor before writing. As a result, the check time is almost the same as the end of reading.

This can shorten the checking time.

〔Example〕

FIG. 1 shows the recording format within one track. Each track consists of m blocks 80 to 5rn-1 corresponding to sectors, and within this block there is an original sector O8 and an ortho (alternative) sector As. Furthermore, each sector consists of an ID section and a data section. The ID section mainly records information indicating the physical location of the sector (track number, sector number), and the data section records the user data section and accompanying information such as error recovery (ECC) and error check (CRC). ing.

FIG. 2 shows a configuration diagram of an optical GUIF control device that controls the writing and reproduction of information in the original sector O8 and the ortho sector AS described above.

In Fig. 2, 1 is an interface controller that controls signal exchange with a higher-level device (host interface), and 2 is an interface controller that operates each component of the optical disk control device according to a predetermined procedure according to instructions from the higher-level device. 3 is a memory for storing microinstructions that define control operations by the microprocessor 2; 4 is a data buffer with a user data storage capacity of one track of an optical disk; 5 is a data buffer; A write circuit modulates the data taken out from the buffer 4 and outputs it to the optical drive device 8. Reference numeral 6 indicates a read circuit that demodulates the data reproduction signal 10R from the optical drive device and transfers it to the data buffer 4. Note that 7 is a selector for selecting the input/output bus of the data buffer 4, and selects the interface bus 20, processor bus 21, and write/read circuit bus 22 in accordance with the microinstruction 23 given from the microprocessor 2. Connected to data buffer 4.

FIG. 3 shows an example of the configuration of the write circuit 5 and read circuit 6 in FIG. 2 above. 52 is created by the ECC cinereage circuit 51 while storing the bus 22 output from the data buffer 4.

Use the generated ECC as incidental information for error recovery.

This is added after the data and stored as a data section of one sector. 53 modulates one sector's worth of information stored in the WR sector buffer 52 and sends it to the optical drive device. 61 inputs the read information 10R sent out from the optical drive device 8. 62 is a VFO circuit 61
demodulates the output signal of 63 is the demodulated signal for one sector.

Store. 64 takes out the information stored in the RD sector buffer 63, generates an ECC syndrome, and determines whether there is an error. In the case of an error that can be corrected by the ECC syndrome generation circuit 64, 65 corrects the data and stores it in the data buffer 4. 11 is
This is a circuit that conveys information in the WR sector buffer 52 and information in the RD sector buffer 63 in the present invention. next,
The present invention will be specifically explained.

In the present invention, during read, after, and write, the write data for one track is passed through the write circuit 5 while the optical drive device [8
In the next rotation, information is stored in the RD sector buffer 63 from the optical drive device 8 in the above-described manner starting from the 0 sector of the track. On the other hand, information corresponding to the information of the read sector is once again stored in the WR sector buffer 52 from the data buffer 4. While storing in each buffer, data conveyor circuit 1
Information to be compared to 1. II and 15 are taken out and conveyed by instruction signals 16 and 17. Furthermore, this conveyor checks the write data before modulation and the read data after demodulation, in units of bytes. The conditions for rewriting the replacement leaning castle based on the result of the conveyor check will be explained with reference to FIG.

FIG. 4 shows an example of the structure of the data portion of one sector.

The data part includes user data UD, U Boo-U
It consists of a Vlo-- word, with one word consisting of Bony 2 and ECC data ED, 4 bytes.

In the above configuration, since the ECC data ED is 4 bytes for each word, it is possible to correct errors of up to 2 bytes by generating an ECC syndrome.

In this state, the data conveyor check counts the number of error areas EN and the number of consecutive bytes EB for each error (.When the data conveyor for one sector is completed, the number of error areas EN is 2 or more, or when the error byte iEB is 2 or more, "1" shown in Figure 3
Rewrite the data stored in the WR sector buffer to the spare area and perform 5 replacement processes. 5.Also, the replacement process is performed under the condition that the number of error areas EN≧2 or the number of error bytes EB≧2. First, the number of error areas F, N≧2
In the case of
There is a possibility that the corrective action due to CC syndrome generation will not be able to be corrected. Similarly, when the number of error bytes EB≧2, there is a minimum of 2-byte errors, so repeating the read operation may result in 5-byte errors, which may not be corrected by ECC syndrome generation. For these reasons, the rewriting operation is performed by replacement processing.

In the above case, the number of error areas EN in one sector and the error byte MEB are used, but other error area numbers EN
/As a method of counting the number of error bytes EB, count the number of error areas EN/error pie) & EB for each code read W0 to W, and calculate the number of error areas EN≧2 or error by)&EB≧2 per word. case,
In step 5, since the check range is performed in units of one code and one word without conveying one sector, it becomes possible to determine a writing defect more quickly.

〔Effect of the invention〕

According to the present invention, it is possible to check the data conveyor while reading information during a read operation after writing in read, after, and write operations, so that the processing time can be reduced. Furthermore, since the conditions for performing the replacement process are considered in comparison with the correction ability of the ECC, there is an effect that there is no need to change the reliability of the conventional device.

[Brief explanation of drawings]

Fig. 1 is a recording format diagram of one track according to an embodiment of the present invention, Fig. 2 is a block diagram of an optical disc control device, Fig. 3 is a block diagram of a write/read circuit, and Fig. 4 is a diagram of one sector of data. FIG. DESCRIPTION OF SYMBOLS 1... Interface controller, 2... Microprocessor, 3... Memory, 4... Data buffer. 5...Writing circuit, 6...Reading circuit, 7...Selector. 8...Light drive device. Patent Attorney Masaru Ogawa ゛Otani 1 Figure δS Original Nano Lt Kuta A5 Orthot Kuta Pattern 2 Atsushi 3 Figure L

Claims (1)

[Claims] 1. An information recording system characterized by having a function of reading the recorded information after recording information on an optical disk, conveying the recorded information with the information before recording, and determining a recording defect.