Modified sliding block code for limiting error propagation

Details Modified sliding block code for limiting error propagation Modified sliding block code for limiting error propagation

1988-05-31

1989-11-21

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

360 39, H03M 700

Patent

active

048825832

ABSTRACT:
Uncompressed data is represented in a constrained code for transmission through a channel which may include record media. A d,k code having a code rate of m
is employed. "d" represents the minimum number of successive zeros in the channel code while k represents the maximum number of zeros in the channel code. "n" is an integer representing the number of code bits in a channel group. The encoding and decoding follows a sliding block coding and decoding algorithm. In the channel coding, the number of successive ones is limited to being not less than two, in some coding it can be a value of d-1. The modification of the d,k code results in decreasing error propagation while increasing the recorded information density. This increase is achieved by increasing the channel code dictionary.

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