Luminance-chrominance separating apparatus having a spatial filtering effect
CA 1115413 A · Owner: Nippon Electric Co. Ltd. · Inventors: Kashigi, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A luminance/chrominance separating apparatus is described in which a luminance and a chrominance signal are extracted from a composite color television signal by a comb filter. The filter comprises a first delay circuit and a second delay circuit, connected in series and each delaying, the composite color signal by one horizontal scanning period. First and second delayed signals are thereby obtained. The second delayed signal is added to the non-delayed television signal to produce a first added signal and this is then added to the first delayed signal to produce a second added signal. The first added signal is also subtracted from the first delayed signal to produce a subtracted signal and …
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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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
- 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
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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.