Data compression using dummy codes

Details Data compression using dummy codes Data compression using dummy codes

2007-08-14

2007-08-14

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

C341S095000, C341S106000

Reexamination Certificate

active

11030801

ABSTRACT:
Received data is compressed according to an algorithm, which is a modification of the conventional LZW algorithm. A limited number of hash values are formed, and a code memory is searched at locations corresponding to the hash values. If all of the locations contains a valid code, but none of them contains a valid code corresponding to a potential new code, a dummy code is created, and a counter, which indicates the number of codes created, is incremented. The algorithm can be implemented in parallel in hardware.

REFERENCES:
patent: 4558302 (1985-12-01), Welch
patent: 4814746 (1989-03-01), Miller et al.
patent: 5642112 (1997-06-01), Cooper
patent: 5838264 (1998-11-01), Cooper
patent: 6624762 (2003-09-01), End, III

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