Digital signal coding/decoding apparatus
CA 2756676 C · Owner: Mitsubishi Electric Corporation · Inventors: Yamada, Yoshihisa; Asai, Kohtaro; Sekiguchi, Shunichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital signal coding apparatus and method for making a compression coding of a digital signal is taught. The digital signal is arithmetically coded by determining a context model to be used for each type of coding data among a plurality of context models. The digital signal is divided for each predetermined unit to be coded. Multiplexed into a bit stream are information representing an initial state of probability of occurrence of the context of model corresponding to the type of the coding data and information of initializing a register value which shows an arithmetic coding process with a bit stream as part of the coded data of said predetermined unit.
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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 April 10, 2003 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 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
Timeline From CIPO dates
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.