Motion signal detecting circuit
CA 2048975 C · Owner: Ko, Jeong-Wan · Inventors: Ko, Jeong-Wan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The motion signal detecting circuit is adapted to an image reproducing system having a frequency unfolding circuit for generating an unfolded luminance signal by unfolding a high frequency component folded into low frequency component into the original frequency band in order to reproduce a full bandwidth image signal in which the high frequency component folded into the low frequency component and recorded on a recording medium having a limited bandwidth. The detecting circuit comprises a prefilter 100 for eliminating the folding carrier contained in the unfolded luminance signal and sidebands thereof and a comb filter 100 for detecting a motion signal which is the difference component …
Read the whole patent
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 August 12, 1991 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2013.
- 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.