Television – Image signal processing circuitry specific to television – Special effects
Reexamination Certificate
1999-07-30
2001-08-28
Hsia, Sherrie (Department: 2614)
Television
Image signal processing circuitry specific to television
Special effects
C348S705000, C348S591000, C348S594000
Reexamination Certificate
active
06281941
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to video signal processing, and more particularly to a production video switcher having a mix-effect (M/E) bank with multiple programmable outputs.
The current state of the art production switchers divide functionality into mix-effects (M/E) banks. These M/E banks have fixed functionality—typically two keyers, one or two wipe generators and a transition component. In many cases resources within an M/E bank are unuseable because of the way an operator chooses to organize the work. At the same time the operator may not be able to locate resources needed to add more components to a video image.
Live video production requires the generation of multiple feeds, each customized for its use. For example the ABC “bug” should not appear on the feed sent to CNN. In many cases additional production video switchers are required to customize feeds.
What is desired is a production switcher that has mix-effect banks which are flexible and enable full use of all the resources available.
BRIEF SUMMARY OF THE INVENTION
Accordingly the present invention provides a production video switcher having a mix-effect (M/E) bank with multiple programmable outputs. A multiple of keyers are selectively coupled to a corresponding multiple of mixers via a router. The mixers through the router also are coupled to a pair of background video signal buses—one primary and the other utility. By appropriately connecting the background signal buses with the mixers different M/E operational modes may be achieved, such as programmable clean feed, mix minus and split modes.
The objects, advantages and other novel features of the present invention are apparent from the following detailed description when read in conjunction with the appended claims and attached drawing.
REFERENCES:
patent: 4947254 (1990-08-01), Abt
patent: 5166797 (1992-11-01), Angell
Grass Valley (US) Inc.
Hsia Sherrie
Smith-Hill and Bedell
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