System for variable length decoding digital transmission data wh

Details System for variable length decoding digital transmission data wh System for variable length decoding digital transmission data wh

1995-09-22

1997-02-11

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

348404, H03M 740

Patent

active

056025491

ABSTRACT:
A system for variable-length-coding and variable-length-decoding digital data divided into a block unit of a predetermined size which includes variable-length-coding each block data according to various scanning patterns, accumulating the various lengths of variable-length-coded data, selecting a scanning pattern corresponding to a minimum accumulated length, transmitting the variable-length-coded data according to the selected scanning pattern and scanning the transmitted data according to the same scanning pattern as applied to variable-length-coding process, thereby the scanned data being variable-length-decoded. As a result, data compression can be improved efficiently by means of utilizing an optimized scanning pattern for variable-length-coding and variable-length-decoding of the block data.

REFERENCES:
patent: 4754336 (1988-06-01), Nishizawa
patent: 4821119 (1989-04-01), Gharavi
patent: 5134396 (1992-07-01), Sirat et al.

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