Method of coding video signals and transmission system thereof

Details Method of coding video signals and transmission system thereof Method of coding video signals and transmission system thereof

1990-10-12

1992-08-04

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358136, H04N 712, H04N 713

Patent

active

051363763

ABSTRACT:
In a video signal coding method for generating transmission data, a digital video signal is quantized by a quantization step which is controlled on the basis of significant picture information to be transmitted. The significant picture information is, for example, the quantity of information in a main region and in a sub region, the quantity of picture information to be coded, the picture motion in coded regions, the amount of variations in picture information between regions to be coded, or the components of spatial frequency with respect to regions to be coded. By reason of such control of the quantization step, deterioration of picture quality of the transmission data can be avoided, while the quantity of transmitted data is reduced.

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