System for processing video signals

Details System for processing video signals System for processing video signals

1981-04-29

1983-03-01

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358138, 358260, 364725, H04N 712, G06F 15332

Patent

active

043756506

ABSTRACT:
A video processing system in which each field of image data is divided into rows and columns of blocks of picture elements. The number of blocks utilized is large enough so that when each block is considered to be a picture element, the blocks provide a reasonable raster for the peripheral vision aspect of the human visual perception system. The blocks of picture elements are transformed into blocks of spatial frequency components. The zero and low spatial frequency components of the blocks of spatial frequency transforms are updated at a sufficiently rapid rate to satisfy the requirements of the peripheral vision aspect of the human perception system. The higher spatial frequency components of the blocks of spatial frequency are updated at a lower rate corresponding to the rate at which the human perception system can respond to such information.

REFERENCES:
patent: 3976826 (1976-08-01), Fullton, Jr.
patent: 3984626 (1976-10-01), Mounts et al.
patent: 4179709 (1979-12-01), Workman

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