Genlock device having log and alarm functions

Details Genlock device having log and alarm functions Genlock device having log and alarm functions

2006-01-17

2010-02-16

Lee, M. (Department: 2622)

Television

Synchronization

Locking of video or audio to reference timebase

C348S512000

Reexamination Certificate

active

07663698

ABSTRACT:
A genlock device comprises: means (31) for inputting an external reference signal; means (32,33,34,36,39,40,41,42,44) for generating a master reference clock signal synchronized in phase with the external reference signal; and means (37) for storing a genlock state. The genlock state includes, for example, absence of a synchronization signal in the external reference signal. The genlock device can further comprise: means (45) for storing a voltage value determined so that a voltage controlled oscillator (40) oscillates a signal having a frequency higher or lower by a predetermined value than a reference frequency of the voltage controlled oscillator; and means (44) for judging whether a voltage value which controls the voltage controlled oscillator is larger or smaller than the voltage value.

REFERENCES:
patent: 4769691 (1988-09-01), Dischert
patent: 5598219 (1997-01-01), Furuya et al.
patent: 10-191099 (1998-07-01), None

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