Global motion compensation for video pictures
CA 2467496 C · Owner: Frojdh, Per · Inventors: Frojdh, Per; Sjoberg, Rickard; Einarsson, Torbjorn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and a method for coding and decoding video data are invented. In a system and method of video data compression a video frame (32) is divided into a sequence of image blocks (38), wherein one of several possible block-coding modes is an implicit global motion compensation (IGMC) mode which is used to , copy pixels from a previous frame (32) displaced by a predicted motion vector. In another embodiment of the invention a system and method of a video data , compression a video frame (32) is segmented into a sequence of slices (36) wherein each slice (36) includes a number of macroblocks (38). Respective slices (36) are encoded and a signal is included in the header (44) of an …
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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 29, 2002 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 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
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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.