Method of variable-length encoding of images and device for perf

Details Method of variable-length encoding of images and device for perf Method of variable-length encoding of images and device for perf

1997-06-10

2000-11-14

Le, Vu

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

H04N 712

Patent

active

061480290

ABSTRACT:
A method for variable-length encoding of images includes a quantization step followed by a variable-length encoding step, whereafter the signals obtained are stored in a buffer memory. The quantization step used is computed on the basis of a feedback parameter, which is a decreasing function of the filling level of the buffer memory, and a feedforward parameter, which is a function of the quantity of information in the image. Advantageously, the feedforward parameter includes at least a multiplicative factor which is a decreasing function of the saturation of one of the chrominance components U or V in the current block or macroblock with respect to the rest of the image. An encoding device is also described.

REFERENCES:
patent: 4302775 (1981-11-01), Widergren et al.
patent: 4394774 (1983-07-01), Widergren et al.
patent: 4868641 (1989-09-01), Modaresse
patent: 5089888 (1992-02-01), Zdepski et al.
patent: 5146324 (1992-09-01), Miller et al.
patent: 5157488 (1992-10-01), Pennebaker
patent: 5185655 (1993-02-01), Wakeland
patent: 5189530 (1993-02-01), Fujii
patent: 5260808 (1993-11-01), Fujii
patent: 5294974 (1994-03-01), Naimpally et al.
patent: 5337049 (1994-08-01), Shimoda
patent: 5337087 (1994-08-01), Mishima
patent: 5396567 (1995-03-01), Jass
patent: 5410351 (1995-04-01), Kojima
patent: 5426463 (1995-06-01), Reininger et al.
patent: 5434623 (1995-07-01), Coleman et al.
patent: 5452007 (1995-09-01), Enari et al.
patent: 5500677 (1996-03-01), Fert
patent: 5696558 (1997-12-01), Tsukamoto
patent: 5745179 (1998-04-01), Senda
"ISO-IEC/JC1/SC29/WG11; Test Model 4.2", Feb. 1993, p. 73.

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