Methods and apparatus for dynamically adjusting f-codes for a digital picture header
CA 2390904 C · Owner: Wu, Siu-Wai · Inventors: Wu, Siu-Wai; Nemiroff, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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The present invention provides methods and apparatus for dynamically adjusting f-codes for a digital picture header of a coded picture. A video encoder having at least one motion estimation stage is provided for encoding the current picture. Motion vectors are determined for one motion estimation stage of the encoder. The motion vectors are analyzed to determine a maximum motion vector range for the picture. A corresponding minimum f-code is determined for the maximum range. The minimum f-code is then inserted into the digital picture header. In this manner the f-codes carried in the digital picture header can be reduced to the minimum required value thus reducing the number of bits needed …
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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 June 19, 2002 and granted April 21, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2024.
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