Video signal storage apparatus for ntsc system
CA 1303214 C · Owner: Nec Corporation · Inventors: Kashigi, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a television video signal storage apparatus for storing a digital chrominance signal of the NTSC system in which the digital chrominance signal is sampled by a sampling frequency 2n-times as much as the subcarrier and contains 2n data for each cycle period of the subcarrier. The apparatus includes a first polarity inverter for inverting the polarity of n successive data of said digital signal among 2n data such that all of said 2n data have the same polarity. A memory is provided for storing the polarity-inverted digital signal delivered from the first polarity inverter. A second polarity inverter is provided for inverting the polarity of n successive data of the …
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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.