System for variable-length-coding and variable-length-decoding d

Details System for variable-length-coding and variable-length-decoding d System for variable-length-coding and variable-length-decoding d

1996-02-23

1998-02-03

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

348408, H03M 740

Patent

active

057149500

ABSTRACT:
A system for coding and decoding digital data divided into segments which includes coding the segment data into symbols 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 or storing the coded data according to the selected scanning pattern and scanning the transmitted or retrieved data according to the same scanning pattern as applied to the coding process, thereby decoding the scanned data. As a result, the efficiency of data compression can be improved by means of utilizing an optimized scanning pattern for coding and decoding the segment data.

REFERENCES:
patent: 4754336 (1988-06-01), Nishizawa
patent: 4821119 (1989-04-01), Gharavi
patent: 4972260 (1990-11-01), Fujikawa
patent: 5021891 (1991-06-01), Lee
patent: 5134396 (1992-07-01), Sirat et al.
patent: 5424778 (1995-06-01), Sugiyama
Mutsima Ohta, et al., "A Comparison of Various Entropy Coding Methods for MCT/DCT Hybrid Coding", Mar. 19, 1987, pp. 17-24.
Chen et al., A Block Transform Coder For Arbitrarily Shaped Image Segments, Proceedings of the IEEE Conference on Image Processing, 1994, vol. 1 pp. 85-89.

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