Circuit for generating field identification signal and method therefor
CA 2225371 C · Owner: Kim, Ki-Bum · Inventors: Kim, Ki-Bum
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A field identification signal generating circuit for a receiver for receiving a high-definition signal and a method, therefor, are provided. According to the method a first, correlation value is calculated between the input, high-definition signal and a first reference signal same as a first known signal. A timing control signal, synchronized with a second known signal whose phase is alternately inverted in every field, is output when the first correlation value is greater than or equal to a predetermined value. A second correlation value is calculated, between the input high-definition signal and a second reference signal same as the second known signal. Information on the polarity 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
- Filed December 19, 1997 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2019.
- 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.