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    • 11. 发明申请
    • M=10 (2,10), D=3.75 RUNLENGTH LIMITED CODE FOR MULTI-LEVEL DATA
    • M = 10(2,10),D = 3.75 RUNLENGTH有限公司的多级数据代码
    • WO1997050179A1
    • 1997-12-31
    • PCT/US1997011327
    • 1997-06-24
    • OPTEX CORPORATION
    • OPTEX CORPORATIONMcLAUGHLIN, Steven, W.
    • H03M05/02
    • G11B20/1426G11B20/1496H03M5/20H03M13/31H04L25/497
    • A system for encoding digital data with an M-ary (d,k) code to provide multi-level coded data where M > 2 comprises an M-ary (d,k) encoder for accepting digital input data. The M-ary (d,k) coder encodes the digital input data to produce a plurality of code symbols, where each code symbol is at one of M levels and each pair of non-zero code symbols is separated by at least d but no more than k zeros. A waveform encoder (204) converts the code symbols into waveform signal amplitudes compatible with a multi-level channel. Each waveform signal amplitude is generated by modulo M addition of a current code symbol with a previous waveform signal amplitude. A specific M = 10 (2,10) code provides high density recording to a multi-level storage medium. The M = 10 (2,10) encoder is implemented using a seven-state encoder and a modulo ten waveform encoder.
    • 一种用M-ary(d,k)码编码数字数据以提供多级编码数据的系统,其中M> 2包括用于接受数字输入数据的M-ary(d,k)编码器。 M-ary(d,k)编码器对数字输入数据进行编码以产生多个码符号,其中每个码符号处于M个电平中的一个,并且每对非零码符号分开至少d但不分 超过k个零。 波形编码器(204)将代码符号转换为与多级信道兼容的波形信号幅度。 每个波形信号幅度通过具有先前波形信号振幅的当前码元的模M相加产生。 特定的M = 10(2,10)代码为多级存储介质提供高密度记录。 M = 10(2,10)编码器使用七态编码器和模十波形编码器实现。