一种用于光盘数据存储的冗余恢复码纠错方法

郑穆; 罗铁威

doi:doi:10.12086/oee.2019.180557

光电工程, 2019, 46 (3): 1, 网络出版: 2019-04-07

一种用于光盘数据存储的冗余恢复码纠错方法

Error correction methodology based on redundant recovery code for optical storage system

论文大纲

郑穆罗铁威 ^*

作者单位

广东紫晶信息存储技术股份有限公司，广东梅州 514779

光存储冗余恢复码纠错方法数据可靠性 optical storage redundant recovery code error correction data reliability

摘要

为提升光存储数据可靠性，本文提出一种用于光盘数据存储的冗余恢复码纠错方法，涉及光盘数据存储领域。对用户数据进行冗余恢复码编码，将其与用户数据组成数据条带组，对编码后的数据条带组再次进行纠错和调制的编码，将再次编码后的数据条带组刻录在光盘上；读取已刻录的数据条带组，先经过调制和纠错的解码，当读取到无法读取的错误数据时，进行冗余恢复码解码，还原用户数据。该方法可兼容光盘现有标准的纠错码，提高光盘的容错率。在蓝光光盘的物理符号误码率为4.2×10-3情况下，经过蓝光标准ECC(error correction code)纠错后符号误码率为4.1×10-13，在此基础上叠加冗余恢复码，符号误码率可下降至7.4×10-24。

Abstract

In order to improve the reliability of optical storage data, this paper proposes an error correction methodology in optical storage system which is based on redundant recovery code technology, it relates to the field of optical disc data storage. The methodology consists of two opposite processes – recording and retrieving. While recording data, firstly, splitting user data into blocks and encoding it with redundancy recovery code; next, organizing data blocks as UDF (universal disc format) file system; finally, modulating and encoding UDF file system data as strip group according to the optical disc physical format and recording it into optical disc. In contrast, while retrieving data, demodulating and decoding data strip group which is stored in optical disc at first; later, following UDF file system format to resume user data; in the end, verifying user data with redundant recovery code and return it to user. The methodology is compatible with the standard optical disc file system, and improves the fault tolerance efficiently. Original blu-ray physical format signal error rate is 4.1×10-13, the signal error rate can be down to 7.4×10-24 after redundancy recovery code check.

参考文献

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郑穆, 罗铁威. 一种用于光盘数据存储的冗余恢复码纠错方法[J]. 光电工程, 2019, 46(3): 1. Zheng Mu, Luo Tiewei. Error correction methodology based on redundant recovery code for optical storage system[J]. Opto-Electronic Engineering, 2019, 46(3): 1.

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