Apparatus for combining video signals

Details Apparatus for combining video signals Apparatus for combining video signals

H - Electricity

04

N

350/53

H04N 5/265 (2006.01)

Patent

CA 1323689

Abstract A processing circuit for receiving a shaped video signal V3' and an associated key signal K3 and providing output signals in response thereto. The processing circuit has at least a first mode of operation and includes a first system operative in the first mode of the processing circuit to generate an output video signal V3" given by V3" = V3' + A, where A is independent of V3'. The circuit also includes a second system operative in the first mode to generate an output key signal having a constant value.

616432

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