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本文为计算机系统中光盘存贮设备提出了一种差错控制方案,其特点是用微处理器实现。在光盘信道差错模式分析的基础上,本文对RS乘积码与RS长距离码进行了较深入的优选比较,给出适合微处理器工作的实用编译码方法。本方案采用Fermat变换,从而将译码所需的乘法次数降低了一个数量级,本文并对Fermat变换作了改进。使用了TMS32020微处理器,给出了编译码流程,通过了仿真检验。该方案将显著地改善光盘存贮器的可靠性。
In this paper, an error control scheme for optical disc storage in computer system is proposed, which is characterized by a microprocessor. Based on the analysis of the channel error mode of the optical disc, the article compares the RS product code with the RS long distance code deeply, and presents a practical coding and decoding method suitable for the microprocessor. The scheme adopts Fermat transform, thereby reducing the number of multiplications required for decoding by one order of magnitude. In this paper, Fermat transform is improved. Using the TMS32020 microprocessor, given the coding and decoding process, through the simulation test. This solution will significantly improve the reliability of the optical disk storage.