Audio synchronization apparatus

Details Audio synchronization apparatus Audio synchronization apparatus

1991-05-28

1993-04-13

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 504

Patent

active

052027619

ABSTRACT:
An audio synchronizer apparatus having a delay detector for accurately measuring the delay of a video apparatus, coupled with a controllable, variable delay audio delay circuit for accurately delaying an audio frequency signal by substantially the same amount as the video signal delay. The apparatus disclosed can operate successfully even with video delays exceeding one frame, without requiring an auxiliary correlation circuit. The variable audio delay may also contain precise filtering to compensate for adverse effects introduced by the delay.

REFERENCES:
patent: 4313135 (1982-01-01), Cooper
patent: 4618890 (1986-10-01), Kouyama
patent: 4644400 (1987-02-01), Kouyama
patent: 4703355 (1987-10-01), Cooper

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