High speed variable length decoder

Details High speed variable length decoder High speed variable length decoder

1992-02-13

1993-07-06

Pellinen, A. D.

Coded data generation or conversion

Digital code to digital code converters

To or from variable length codes

341 59, H03M 740

Patent

active

052258327

ABSTRACT:
A high speed variable length decoder can decode more than one code word in one cycle. A PLA used in the decoder includes extra product lines and extra output lines in order to detect and decode two successive short length code words in one cycle. When two short length code words are detected, a corresponding extra product line is activated and the two code words are decoded in the same cycle using an extra output line. For a digital video compression system, a significant speed-up in the variable length decoder can be achieved by the invention.

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patent: 5055841 (1991-10-01), Cordell
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S.-M. Le, M.-T. Sun et al, "VLSI Implementation of an Entropy Coder and Decoder for Advanced TV Applications", IEEE, CH2868-8/90/0000, 1990, pp. 3030-3033.
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M. Sung & S. Lei, "A Parallel Variable-Length-Code Decoder for Advanced Television Applications", 3rd Int'l Workshop on HDTV, Aug., 1989.

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