Adaptive coding and decoding of wide-range coefficients
CA 2618564 C · Owner: Microsoft Corporation · Inventors: Srinivasan, Sridhar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A block transform-based digital media codec more efficiently encodes wide dynamic range transform coefficients in two parts: a normalized coefficient and bin address. The normalized coefficient relates to a grouping of coefficient values of the wide dynamic range into bins whereas the bin , address is an index of the coefficient value within a bin. With careful selection of the bin size, the normalized coefficients have a probability distribution more similar to narrow range transform coefficients which is , better suited to variable length entropy coding. The codec uses variable length entropy coding to encode the normalized coefficients in a "core" of the compressed bitstream, and …
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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 August 3, 2006 and granted April 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.