High-definition video encoding system having color-sensitive qua

Details High-definition video encoding system having color-sensitive qua High-definition video encoding system having color-sensitive qua

1992-07-24

1994-03-15

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348405, 348419, H04N 7133, H04N 1104

Patent

active

052949745

ABSTRACT:
A video signal encoder uses an encoding system such as that developed by the Moving Picture Experts Group (MPEG). A key component of this encoding system increases the quantization step size of image data, thus decreasing its quantization resolution, to reduce the number of bits used to encode the data. Apparatus according to the present invention, monitors the color information being encoded and inhibits or reduces any increase in quantization step size for the luminance component and the color component of the image when signals representing saturated or nearly saturated red image components are being encoded.

REFERENCES:
patent: 4926246 (1990-05-01), Darling
patent: 4999705 (1991-03-01), Puri
patent: 5079621 (1992-01-01), Daly
patent: 5130786 (1992-07-01), Murata
patent: 5134475 (1992-07-01), Johnston
patent: 5157488 (1992-10-01), Pennebaker
M. Kiver & M. Kaufman, "Television Electronics-Theory & Servicing, Eighth Edition," Sec. 8.4 (pp. 189-190), 1983.

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