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AssigneeU.S. Philips Corporation
InventorsJosephus A. H. M. Kahlman, Kornelis A. Schouhamer Immink
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A device for encoding a stream of databits of a binary source signal (S) into a stream of databits of a binary channel signal (C), wherein the bitstream of the source signal is divided into n-bit source words (x.sub.1, x.sub.2), which device includes a converting circuit (CM) adapted to convert the source words into corresponding m-bit channel words (y.sub.1, y.sub.2, y.sub.3). The converting circuit (CM) is further adapted to convert n-bit source words into corresponding m-bit words, such that the conversion for each n-bit source word is parity preserving (table I). The relations hold that m>n.gtoreq.1, p.gtoreq.1, and that p can vary. Preferably, m=n+1. Further, a decoding device is disclosed for decoding the channel signal obtained by means of the encoding device.
A device for encoding a stream of databits of a binary source signal into a stream of databits of a binary channel signal, wherein the bitstream of the source signal is divided into n-bit source words, which device comprises converting means adapted to convert said source words into corresponding m-bit channel words, characterized in that, the converting means are adapted to convert a block of p consecutive n-bit source words into a corresponding block of p consecutive m-bit channel words, such that the conversion for each block of p consecutive n-bit source words is parity preserving, where n, m and p are integers, m>n.gtoreq.1, p.gtoreq.1, and where p can vary.
Device for decoding a stream of data bits of a binary channel signal into a stream of databits of a binary source signal, wherein the bitstream of the channel signal is divided into m-bit channel words, which device comprises deconverting means adapted to deconvert m-bit channel words into corresponding n-bit source words, characterized in that, the deconverting means are adapted to deconvert a block of p consecutive m-bit channel words into a corresponding block of p consecutive n-bit source words, such that the conversion for each block of p consecutive m-bit channel words is parity preserving, where n, m and p are integers, m>n, p.gtoreq.1, and where p can vary.
Dependencies are inferred from the claim text.