Chroma-key signal generator
CA 1195766 A · Owner: General Corporation (The) · Inventors: Shirakami, Toshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chroma-key signal generator is provided which may be utilized to effect an electronic insertion of a picture into another picture, by utilizing a color television signal. The generator includes a first color selection/clip circuit which selects any desired hue signal from three primary color signals and clips it at a given level to provide a first key signal, a second color selection/clip circuit which selects hue signal of a different hue from the first mentioned hue signal, from the three primary color signals and clips it at a given level to provide a second key signal, and a logical and arithmetic circuit which logically operates on the first and the second key signal to provide an …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.