Video signal transmission system and method

Details Video signal transmission system and method Video signal transmission system and method

1992-07-29

1995-04-25

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348405, 348419, H04N 7133, H04N 7137

Patent

active

054103517

ABSTRACT:
In a video signal transmission system in which input video signals are high efficiency coded for transmitting, the high efficiency coded data are decoded with quantization information determined for each block group by the amount of the data remaining in the buffer memory. The decoded data are compared with the original video data to determine the difference data. The difference data are weighted with a flatness value which defines the degree of perceivability of the distortion. The quantization size for the video data to be transmitted actually is determined based on the difference data or the weighted difference data so that the quality of the picture to be transmitted can be improved.

REFERENCES:
patent: 4077053 (1978-02-01), Ishiguro
patent: 5136376 (1992-08-01), Yagasaki
patent: 5245427 (1993-09-01), Kunihiro

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