Coded data generation or conversion – Digital code to digital code converters – To or from 'n' out of 'm' codes
Reexamination Certificate
2005-09-06
2005-09-06
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
To or from 'n' out of 'm' codes
C341S050000
Reexamination Certificate
active
06940431
ABSTRACT:
A succession of input data words is converted into a first succession of information code words including first candidate one and a second succession of information code words including second candidate one different from first candidate one. One is selected from the first succession of information code words and the second succession of information code words as a final succession of information code words in a manner such that the absolute value of a DSV relating to the final information-code-word succession will be smaller. Check bits are generated in response to the final information-code-word succession and a predetermined parity generation matrix of LDPC encoding. The check bits are changed to conversion code words. The final information-code-word succession and the conversion code words are combined into an output-code-word sequence which obeys (1, k) RLL, where “k” is a predetermined natural number in the range of 9 to 12.
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Portions of Japanese bookLDPC(Low Density Parity Check)Codes/Sum-Product Decoding Methodby I. Wadayama, published by Triceps in 2002, pp. 31-33 and 92-95. English explanation of the portions submitted is given in the specification of the instant application, no month.
Jean-Pierre Peguy
Victor Company of Japan Ltd.
Woo Louis
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