Optical disc device and data reading method

Abstract

An optical disk apparatus reads data written in an optical disk in units of code blocks arranged by joining a plurality of correcting codes. The optical disk apparatus includes a reading unit for reading the code block from the optical disk and an error correcting unit for combining first error correcting processing performed on the code block read by the reading unit with second error correcting processing performed by adding remove information to codes that cannot be corrected during at least the first error correcting processing.

Description

technical field [0001] The present invention relates to an optical disc device which reads data in units of code data blocks arranged by connecting a plurality of error correction codes from an optical disc. Background technique [0002] In the past, in an optical disc device that reads information from and writes information to an optical disc, the bit error rate of user data has been improved sufficiently for practical use by means of a predetermined error correction code. Figure 8 Indicates that the disc sector format is determined by the International Organization for Standardization (ISO). exist Figure 8 In , only the relationship between user data and error correction codes is shown, and address cells, voids, VFO (Variable Frequency Oscillator), synchronization signals, etc. are omitted. This optical disc device arranges data blocks of user data input successively, forms ECC (Error Correction Code) by adding error correction codes to the arranged data blocks based on...

AI Technical Summary

Problems solved by technology

However, in RS (Reed-Solomon) codes employing general GF(2^8), it is difficult to arrange code data blocks having 64K bytes or more of user data, unlike typical DVDs using PRC

[0012] Although it is desirable to increase the capacity of the disc as much as possible, it is not desirable to significantly reduce coding efficiency and increase redundancy

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