H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 25/49 (2006.01) G11B 20/14 (2006.01) H03M 5/14 (2006.01)
Patent
CA 2046953
For encoding a stream of k-bit data bytes into a stream of m-bit code bytes satisfying given constraints, a coding principle and coder apparatus are disclosed which allow pipelined and parallel handling of the byte stream. Each data byte DB and an associated coder state indicator S are together converted into a code byte CB. The coder state indicator S(i) to be associated with a databyte DB(i) is obtained by logically combining the coder state indicator S(i-1) of the preceding data byte DB(i-1) and a state transition indicator T(i-1) derived from the latter. This allows the simultaneous generation of all coder state indicators S for a whole group (a word) of data bytes thereby enabling the parallel and pipelined operation of the coder.
Cideciyan Roy Daron
Zurfluh Erwin Alexander
Barrett B.p.
International Business Machines Corporation
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