Coding/decoding method and apparatus therefor

Details Coding/decoding method and apparatus therefor Coding/decoding method and apparatus therefor

1993-12-17

1996-01-23

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

341 95, 360 40, H03M 700

Patent

active

054868289

ABSTRACT:
A coding method and apparatus convert a data word of m.times.r bits into a code word of n.times.r bits (m<n) with regard to a predetermined number r. The basic data word length m is made two or three bits, basic code word length n is made five bits and the predetermined number r satisfies the relation 1.ltoreq.r.ltoreq.4 or 1.ltoreq.r.ltoreq.2 respectively, the data word of m.times.r bits is converted into a code word of 5r bits, and coding is performed in such a manner that the run number of "0"s is greater than four and less than 19, or greater than one and less than five respectively. Further, a decoding method and apparatus decode perform decoding in accordance with the logical expressions

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