Digital blanking reproducing circuit

Details Digital blanking reproducing circuit Digital blanking reproducing circuit

1987-08-12

1988-09-06

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 21R, 358166, H04N 514

Patent

active

047697067

ABSTRACT:
A digital blanking reproducing circuit wherein video signals are converted into N (N: positive integer) bit digital signals and then signal-processed. On the basis of plural N bit signals during the blanking interval of the video signal, an M (M: positive integer, M>N) bit average signal and a plurality of N bit approximation data in the neighborhood of the average value signal are produced. The plurality of N bit approximation data are time-divisionally output in a time-division ratio decided in accordance with the lower order (M - N) bit data of the average signal. Thus, the signal processing of the N bit signals provides the accuracy equivalent to that of M (M>N) bit signals.

REFERENCES:
patent: 3953668 (1976-04-01), Judice
patent: 3987243 (1976-10-01), Schwartz
patent: 4240112 (1980-12-01), Inada
patent: 4600937 (1986-07-01), Kudo
patent: 4663666 (1987-05-01), Bloom

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