Method and apparatus for video communication over a limited bandwidth medium
CA 2455501 A1 · Owner: Callaci, John W. · Inventors: Callaci, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for creating intermediate image frame (r403-r407) based on two or more successive captured image frames for transmission over a limited bandwidth medium, such as a telephone line (201). The intermediate image frames (r403-r407) are constructed based on pixel information of portions that did change between two successive frames. The intermediate frames are constructed without the necessity of creating portions of the successive image frames (t401,t402) that did not move or change. The created intermediate frames may be combined with originally captured frames to convey video information to a user.
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 7, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2024.
- 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.