Video processing method and apparatus
CA 2379330 C · Owner: Cerullo, Albert · Inventors: Glass, Gregory; Dhein, Robert; Cerullo, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus are set forth for encoding and decoding video to achieve bandwidth compression. In one form of the disclosure, two video signals (810 850), representative of, different images can be transmitted using only the bandwidth (880) generally allocated to a single video signal with little or no, perceived degradation of image quality. In another form of the disclosure, motion indicative signals (970) are used in a technique that dynamically modifies the frequency band information to be stored and/or transmitted.
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 March 29, 1991 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 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.