Phase locked loop chain for locking audio sampling to serial dig

Details Phase locked loop chain for locking audio sampling to serial dig Phase locked loop chain for locking audio sampling to serial dig

1994-06-10

1996-04-09

Groody, James J.

Television

Synchronization

Locking of video or audio to reference timebase

348536, 331 20, H04N 512

Patent

active

055066275

ABSTRACT:
A phase locked loop (PLL) chain for locking audio sampling to serial digital component video timing has a deserializer that recovers a video sample clock signal from a serial digital video signal, the deserializer including a wide bandwidth PLL. A tracking filter in the form of a narrow bandwidth PLL having a low pass filter function reduces the jitter in the video sample clock signal to produce a stable reference clock signal. The stable reference clock signal is input to an audio sample clock generator to produce a stable audio sample clock signal for extracting audio data from the serial digital video signal.

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patent: 4769704 (1988-09-01), Hirai et al.
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patent: 4847678 (1989-07-01), McCauley
patent: 4851909 (1989-07-01), Noske et al.
patent: 5043813 (1991-08-01), Christopher

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