Color image signal encoding device

Details Color image signal encoding device Color image signal encoding device

1989-09-28

1991-12-10

Kostak, Victor R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358138, 358135, H04N 1104

Patent

active

050722905

ABSTRACT:
An adaptive type differential encoding method and a device for differentially encoding a color image signal consisting of a plurality of component signals are arranged: To form sample signals for the component signals by sampling the color image signal for every component signal thereof; to form differential signals for the component signals by using the sample signals; to set an allowable quantization error at least for one of the plurality of component signals; to set quantizing characteristics for the differential signals according to the size of the allowable quantization error; and to quantize and encode the differential signals on the basis of the set quantizing characteristics. The arrangement takes the visual perception characteristic of man and enables a differential encoding process to be efficiently accomplished on the color image signal without causing any conspicuous signal deterioration.

REFERENCES:
patent: 4716453 (1987-12-01), Pawelski
patent: 4875090 (1989-10-01), Shimokoriyama et al.

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