Automatic level control (ALC) for video signals

Details Automatic level control (ALC) for video signals Automatic level control (ALC) for video signals

2007-10-16

2007-10-16

Kostak, Victor R. (Department: 2622)

Television

Monitoring, testing, or measuring

Synchronization

C348S678000, C348S691000

Reexamination Certificate

active

10769100

ABSTRACT:
Disclosed are methods and systems for automatic level control (ALC) in a video signal processing system. The new ALC of the invention takes into account the gain applied to the video signal, such as that provided by an associated automatic gain control (AGC). Methods and systems of the invention use present gain control values and previous gain control values in quickly converging to a new offset control value.

REFERENCES:
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patent: 5339114 (1994-08-01), Lagoni et al.
patent: 5771077 (1998-06-01), Jennes et al.
patent: 6172716 (2001-01-01), Karlock
patent: 6219107 (2001-04-01), Renner et al.
patent: 2004/0150755 (2004-08-01), Nave

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