Coded data generation or conversion – Digital code to digital code converters – Byte length changed
Patent
1994-04-06
1995-12-19
Young, Brian K.
Coded data generation or conversion
Digital code to digital code converters
Byte length changed
H03M 700
Patent
active
054772222
ABSTRACT:
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.
REFERENCES:
patent: 4337458 (1982-06-01), Cohn et al.
patent: 4547890 (1985-11-01), Gindi
"Coding Techniques for Digital Recorders" by K. A. Schouhamer Immink, Chapter 5.6.7, pp. 127 to 131, Prentice Hall (1991).
Bell System Technical Journal, "Spectrum of a Binary Signal Block Coded for DC Suppression", vol. 53, No. 6, pp. 1103-1106, 1974.
Kahlman Josephus A. H. M.
Schouhamer Immink Kornelis A.
Goodman Edward W.
U.S. Philips Corporation
Young Brian K.
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