Merging RGB with Video signal

A circuit which receives RGB and composite video and provides both RGB and composite merged outputs. Merging of RGB signals occur where the input composite signal is converted to RGB; and also, merging occurs of composite signals where the input RGB is converted to a composite signal. The circuit is particularly useful in a video overlay application. Notch filters are used both in the video path and keying path. The notch filters are centered at frequencies equal to the dot clock frequency of the RGB divided by integers where the result of this division falls within the chroma subcarrier spectrum.

Inventors: Paul E. GreavesMichael R. MooreStephen G. PerlmanLaurence A. Thompson
Original Assignee: Apple Computer, Inc.
Primary Examiner: Wendy R. Greening
Current U.S. Classification: 348/599345/592345/629348/594348/E09.039
International Classification: H04N 974; H04N 5262; H04N 5272; G09G 114

Author: Gilbert Tan TS

IT expert with more than 20 years experience in Apple, Andriod and Windows PC. Interests include hardware and software, Internet and multimedia. An experienced Real Estate agent, Insurance agent, and a Futures trader.

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