Method for reduced bit-depth quantization
CA 2801972 C · Owner: Sharp Kabushiki Kaisha · Inventors: Kerofsky, Louis Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for the quantization of a coefficient. The method comprises: supplying a coefficient K; supplying a quantization parameter (QP); forming a quantization value (I) from the coefficient K using a mantissa portion (Am (QP)) and an exponential portion (x Ae(QP)). Typically the value of x is 2. In some aspects of the method forming a quantization value (I) from the coefficient K includes L = K*A(QP) = K*Am(QP)* (2Ae(QP)). In other aspects the method further comprises: normalizing the quantization value by 2N as follows Ln = L/2N = K*Am(QP)/2(N- Ae(QP)) In some aspects forming a quantization value includes forming a set of recursive quantization factors with a period P where …
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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 8, 2002 and granted July 22, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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.
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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.