Method and apparatus for providing data stream for cost effectiv

Details Method and apparatus for providing data stream for cost effectiv Method and apparatus for providing data stream for cost effectiv

1996-06-21

1997-03-25

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from nrz codes

341 59, 341106, 341102, H04L 2549

Patent

active

056149018

ABSTRACT:
A system and method for encoding and decoding binary data for serial transmission over a physical medium provides a highly efficient and less complex coding scheme while guaranteeing clocking information and guaranteeing an NRZ(I)-disparity of no greater than one per five-bit word. The system and method of the present invention comprise a 4/5 encoder which enables each nibble to be encoded and decoded independently from one another. The Coding system and method of the present invention guarantees an NRZ(I)-disparity having a magnitude of no greater than one for any word after NRZ(I) while providing at least one word with "NRZ(I) comma" property.

REFERENCES:
patent: 4833471 (1989-05-01), Tokuume et al.
patent: 4987572 (1991-01-01), Scott
patent: 5018142 (1991-05-01), Simcoe et al.
patent: 5420583 (1995-05-01), Knecht
IBM Journal of Research and Development, vol. 27, No. 5, Sep. 1983 "A DC-Balanced, Partitioned-Block, 8B/10B Transmission Code", pp. 445-446.
Data Communications, vol. 13, No. 7, Jul. 1984, Joshi S. and Iyer V., "New Standards for Local Networks Push Upper Limits for Lightwave Data", p. 134 .

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