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    • 6. 发明授权
    • Device for encoding/decoding n-bit source words into corresponding m-bit channel words, and vice versa
    • 将n位源字编码/解码为相应的m位通道字的装置,反之亦然
    • US06225921B1
    • 2001-05-01
    • US09177957
    • 1998-10-23
    • Josephus A. H. M. KahlmanKornelis A. Schouhamer ImminkGijsbert J. Van Den EndenToshiyuki NakagawaYoshihide ShimpukuTatsuya NaraharaKousuke Nakamura
    • Josephus A. H. M. KahlmanKornelis A. Schouhamer ImminkGijsbert J. Van Den EndenToshiyuki NakagawaYoshihide ShimpukuTatsuya NaraharaKousuke Nakamura
    • H03M500
    • G11B20/1426H03M5/145
    • A device is disclosed for encoding a stream of databits of a binary source signal (S) into a stream of databits of a binary channel signal (C) satisfying a (d,k) constraint, wherein the bitstream of the source signal is divided into n-bit source words (x1, x2), which device comprises converting means (CM) adapted to convert said source words into corresponding m-bit channel words (Y1, Y2, Y2). The converting means (CM) are further adapted to convert n-bit source words into corresponding m-bit channel words, such that the conversion for each n-bit source word is parity preserving (table I). The relations hold that m>n≧1, p≧1, and that p can vary. Preferably, m=n+1. Further, a sync word generator (9) is available for generating a q-bit sync word also satisfying said (d,k) constraint, the said sync word starting with a ‘0’ bit and ending with a ‘0’ bit, the device further comprising merging means (19) for merging said sync word in said stream of databits of the binary channel signal, and that q is an integer value larger than k. (FIG. 1) Further, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.
    • 公开了一种用于将二进制源信号(S)的数据位流编码为满足(d,k)约束的二进制信道信号(C)的数据位流的装置,其中源信号的比特流被分为 n位源字(x1,x2),该装置包括适于将所述源字转换成对应的m位通道字(Y1,Y2,Y2)的转换装置(CM)。 转换装置(CM)还适于将n位源字转换成相应的m位通道字,使得每个n位源字的转换是奇偶校验(表I)。 关系认定m> n> = 1,p> = 1,p可以变化。 优选地,m = n + 1。 此外,同步字生成器(9)可用于生成也满足所述(d,k)约束的q位同步字,所述同步字以“0”位开始并以“0”位结束, 装置还包括用于在所述二进制信道信号的所述数据位流中合并所述同步字,并且所述q是大于k的整数值的合并装置(19)。 (图1)此外,公开了一种解码装置,用于对通过编码装置获得的信道信号进行解码。