Digital video compression system with variable digital filter

Details Digital video compression system with variable digital filter Digital video compression system with variable digital filter

1985-10-24

1987-09-22

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358 12, 358135, 358261, H04N 712, H04N 1106, H04N 1120, H04N 1419

Patent

active

046958835

ABSTRACT:
A method and system for compressing television video signals for digital transmission allows full motion pictures to be transmitted. The analog signal is digitized and stored in a memory A in consecutive pixel value locations. The values of the color components of each pixel value are summed and stored in a memory B. In the second frame, the sum of each pixel value is compared with the sums stored in memory B. If the difference is greater than a filter number, then that particular pixel is transmitted by the control computer. The total number transmitted for each frame is compared to a maximum allowable data rate, and the filter number is adjusted accordingly.

REFERENCES:
patent: 4025950 (1977-05-01), Matsumoto et al.
patent: 4302775 (1981-11-01), Widergren et al.
patent: 4455571 (1984-06-01), Shimizu et al.
patent: 4517596 (1985-05-01), Suzuki

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