Methods, software, circuits and systems for coding information

Details Methods, software, circuits and systems for coding information Methods, software, circuits and systems for coding information

2005-10-18

2005-10-18

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S056000, C341S057000, C341S059000, C375S219000, C375S286000, C375S287000, C375S292000, C375S295000, C375S298000, C375S300000, C375S316000

Reexamination Certificate

active

06956510

ABSTRACT:
Methods, software, circuits, architectures, and systems for encoding, decoding and error checking/correcting information, particularly pulse amplitude modulated information. The present invention enjoys particular advantage when used to encode x-unit sequence values of N-ary information into y-unit sequence values of M-ary information and to decode y-unit sequence values of M-ary information into x-unit sequence values of N-ary information, where Nx<My(and particularly where Nx<My, but Nx>My−M). The present invention advantageously provides a straight-forward mechanism for coding information that enables one to take advantage of coding overhead (e.g., unused states in the encoded, transmitted sequence) to accomplish other coding objectives, such as conforming to coding constraints, reducing transmission errors (or increasing the likelihood of successfully correcting such errors), dc balancing the coded information, and under certain conditions, even reducing power consumption.

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John G. Proakis; Digital Communications, Fourth Edition; Oct. 2001 by The McGraw-Hill Companies, Inc. and Publishing House of Electronics Industry, Beijing, People's Republic of China.

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