Adaptive weighting of reference pictures in video decoding
CA 2491865 C · Owner: Thomson Licensing · Inventors: Boyce, Jill Macdonald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A video decoder (300), encoder (500), and corresponding methods for processing video signal data for an image block and a particular reference picture index to predict the image block are disclosed that utilize adaptive weighting of reference pictures to enhance video compression where a decoder (300) , includes a reference picture weighting factor unit (380) for determining a weighting factor corresponding to the particular reference picture index; an encoder (500) includes a reference picture weighting factor assignor (572) for assigning a weighting factor corresponding to the particular reference picture index; and a method for decoding includes receiving a reference picture index …
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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 July 14, 2003 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2025.
- 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.