Coded data generation or conversion – Digital code to digital code converters – To or from minimum d.c. level codes
Patent
1995-08-15
1997-03-04
Gaffin, Jeffrey A.
Coded data generation or conversion
Digital code to digital code converters
To or from minimum d.c. level codes
341 50, 341 95, 360 40, H03M 700
Patent
active
056083971
ABSTRACT:
A method and apparatus generates a channel codeword based on codewords with arbitrary block digital sums. Respective portions of the channel codeword are generated based on respective sets of input symbols, and the channel codeword is generated from the portions in accordance with another set of input symbols. The potions are advantageously codewords, comprising symbols, generated by selecting, for each set of input symbols, a codeword from a codebook and by adapting, as for example by ordering or by inverting symbols in, the codewords to form the channel codeword.
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Gaffin Jeffrey A.
Kost Jason L. W.
Lucent Technologies - Inc.
Olson Katharyn E.
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