Timebase corrector with drop-out compensation

Details Timebase corrector with drop-out compensation Timebase corrector with drop-out compensation

1991-02-06

1993-09-14

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358150, 358314, 358336, H04N 504, H04N 508

Patent

active

052454304

ABSTRACT:
A timebase corrector is provided, in which an input video signal is written in a timebase error correcting memory on the basis of a clock pulse synchronized with a synchronizing signal in the input video signal and the signal written in the time base error correcting memory is read out on the basis of a read clock pulse synchronized with a reference signal to thereby correct a timebase error. In this timebase corrector, when a drop-out of a first vertical synchronizing signal in the input video signal occurs, the write of the input video signal in the timebase error correcting memory is inhibited, and a timebase error is corrected by the input video signal already written in the memory until a second vertical synchronizing signal is detected.

REFERENCES:
patent: 4054903 (1977-10-01), Ninomiya
patent: 4733312 (1988-03-01), Morimoto
patent: 4766495 (1988-08-01), Kobayashi et al.
patent: 4974082 (1990-11-01), Heitmann

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