Method and device for throughput compression for a videophone camera
CA 2069873 C · Owner: Guichard, Jacques · Inventors: Eouzan, Jean-Yves; Buchner, Georges; Heurtaux, Jean-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method consists:, - in dividing up the array of photosensitive cells into two frames of interlaced lines (1...576) of cells, - in coupling each line (1, 2; ...575 576) of, one frame with the counterpart line of the other frame to obtain an ordered sequence of pairs of counterpart cells, - in compounding (2; 3) for each pair the luminance values supplied by each cell - in transmitting the resulting luminance values associated with each pair of cells - in varying the timing of the system in order to both simplify the transmission coder-decoder and improve its performance. Application: videophones.
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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 November 27, 1990 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2012.
- 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.