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1. 发明授权

US5315601A Error correction method and apparatus thereof 失效
标题翻译：误差校正方法及其装置
公开(公告)号：US5315601A
公开(公告)日：1994-05-24
申请号：US707811
申请日：1991-05-30
申请人： Man-young Lee , Hak-song Park , Young-cheol Kim , Tae-yong Kim , Yong-jin Choi , Jae-moon Kim
发明人： Man-young Lee , Hak-song Park , Young-cheol Kim , Tae-yong Kim , Yong-jin Choi , Jae-moon Kim
IPC分类号： G06F11/10 , H03M13/00 , H03M13/15
CPC分类号： H03M13/15 , G06F11/10 , H03M13/151
摘要： An error correction method and apparatus for correcting multiple errors in received digital data word signals calculates syndromes S.sub.0, S.sub.1, S.sub.2 and S.sub.3 from a block of n received data words and a parity check matrix H. First coefficients .sigma..sub.1 and .sigma..sub.2 are calculated from the derived syndromes and a second coefficient K is calculated from the first coefficients .sigma..sub.1 and .sigma..sub.2. An error location value x.sub.1 is calculated from the second coefficient K, actual error location values X.sub.1 and X.sub.2 are calculated from the value x.sub.1, and error values Y.sub.1 and Y.sub.2 are calculated from the actual error location values X.sub.1 and X.sub.2. The received data words are then corrected by applying the calculated error values Y.sub.1 and Y.sub.2. The error location value x.sub.1 calculator is preferably constituted by logic gates which enable the apparatus to be smaller and faster than those using a conventional ROM table.
摘要翻译：用于校正接收到的数字数据字信号中的多个误差的纠错方法和装置根据n个接收数据字块和奇偶校验矩阵H来计算校正子S0，S1，S2和S3。首先将系数sigma1和sigma2从根据第一系数σ1和σ2计算导出的校正子和第二系数K.根据第二系数K计算误差位置值x1，根据值x1计算实际误差位置值X1和X2，并且误差值 Y1和Y2由实际误差位置值X1和X2计算。然后通过应用计算出的误差值Y1和Y2来校正接收到的数据字。误差位置值x1计算器优选地由逻辑门构成，使得装置能够比使用常规ROM表的那些更小和更快。

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