Encoder and decoder

Details Encoder and decoder Encoder and decoder

1995-11-08

1998-03-31

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

371 21, 341 65, 341 67, 386109, H04N 736, H04N 750

Patent

active

057344302

ABSTRACT:
An encoder counts the length of a data produced by the variable-length encoding, and time-division-multiplexes information of the data length to the variable-length encoded data. An encoder time-division-multiplexes information of the number of bits after a fixed partition used in the error-correction encoding to the initial bit of a variable-length code to a variable-length encoded data, and transmits them. An encoder, when a variable-length code for one symbol of the variable-length encoding extends over a partition used in the error-correction encoding, inserts a special code before the partition, or guarantees that the top of the partition is always at the top of the variable-length code. An encoder obtains the sum of fields and the difference between fields, and performs on these values the orthogonal transform to encode them.

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patent: 5036391 (1991-07-01), Auvray
patent: 5239308 (1993-08-01), Keesen
patent: 5337087 (1994-08-01), Mishima
patent: 5479264 (1995-12-01), Ueda
patent: 5488482 (1996-01-01), Ueda
Paper entitled "Criteria for the Protection of the Video Information in a Codec Based on DCT"; Signal Processing of HDTV, II; Proceedings of the 3rd Intl. Workshop on HDTV, Turin Italy (Aug.-30-1989 to Sep.-1-1989); pp. 769-776.
"Information Technology--Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to About 1,5 Mbit/s" Part 2: Video; Intl. Standard; ISO/IEC 11172-2; 1993; pp. 1-38.
Nikkei Electronics; Oct. 15, 1990; Unix; pp. 116-147.
"A Consideration on Filters in the Coding Loop of Hybrid MC/DCT Coding Scheme", IE86-100, Feb.-26-1987; pp. 17-23.
IEEE Transactions on Information Theory, vol. IT-22, No. 4, Jul. 1976.

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