DC-free line codes

Details DC-free line codes DC-free line codes

2006-02-28

2006-02-28

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

Reexamination Certificate

active

07006016

ABSTRACT:
A data encoding system for a data stream comprises a data dependent scrambler that receives the data stream including K m-bit symbols, that selects a seed based on the K m-bit symbols, that scrambles the K m-bit symbols using the seed and that outputs a codeword including the scrambled K m-bit symbols and the seed. A DC control module receives a plurality of the codewords from the data dependent scrambler, selectively inverts selected ones of the plurality of codewords to reduce a difference between a total number of zeroes and total number of ones in the plurality of codewords and outputs an encoded data stream.

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