Methods and apparatus for rate control during dual pass encoding
CA 2396305 C · Owner: General Instrument Corporation Of Delaware · Inventors: Liu, Vincent; Wu, Siu-Wai; He, Yong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Methods and apparatus for rate control in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I-slices and P- slices respectively in order to generate statistics for both I and P frame encoding for the same anchor frame. An initial complexity estimate for encoding a current frame is determined by the first pass encoder based on statistics from first pass encoding of the current frame and from first pass encoding of a prior encoded frame. A second pass encoder estimates an encoding complexity for the current frame based on the initial complexity and statistics from second pass encoding of the prior encoded frame. The second pass encoder …
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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 29, 2002 and granted March 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2024.
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