Muting apparatus for a compressed audio/video signal receiver

Details Muting apparatus for a compressed audio/video signal receiver Muting apparatus for a compressed audio/video signal receiver

1994-05-17

1995-11-14

Groody, James J.

Television

Synchronization

Locking of video or audio to reference timebase

348515, 348423, H04N 9475

Patent

active

054671396

ABSTRACT:
A compressed audio/video, A/V, receiver provides A/V component timing reference signals (PTS's) coincident with reproduction of associated decompressed component signals. Synchronization apparatus generates a function of the difference of occurring component audio and video PTS's. This function, which is indicative of relative audio and video synchronization, is compared with a predetermined threshold value, and a mute control signal is generated when the threshold is exceeded. Muting circuitry, responsive to the control signal disables audio reproduction when the reproduced audio and video component signal timing deviate from mutual synchronization.

REFERENCES:
patent: Re33535 (1991-02-01), Cooper
patent: 4398220 (1983-08-01), Satoh
patent: 5381186 (1995-01-01), Lee

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