Strobe timing control circuit for use in video tape recorder

Details Strobe timing control circuit for use in video tape recorder Strobe timing control circuit for use in video tape recorder

1991-11-12

1994-07-05

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

Special effects

348551, H04N 5272

Patent

active

053272447

ABSTRACT:
A circuit for varying the strobe timing of the PIP in a VTR which includes a microcomputer, first, second and third counters receiving the signal for varying the strobe timing of the microcomputer, a modulo-4 counter and logic receiving the output of the first counter, a decoder receiving the outputs of the second and third counters, a multiplexer receiving the output of the decoder, the output of the decoder being applied to the clear terminal of the second counter, a register receiving the output of the multiplexer, and a memory connected with the register. The vertical synchronizing pulse of the sub-screens is applied to the clock terminals of the first and second counters and the clock terminal of the register. The output of the microcomputer is applied to the clock terminal of the third counter.

REFERENCES:
patent: 4774582 (1988-09-01), Hakamada
patent: 4814884 (1989-03-01), Johnson
patent: 4845564 (1989-07-01), Hakamada

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