Digital signal coding/decoding apparatus
CA 2686449 C · Owner: Yamada, Yoshihisa · Inventors: Yamada, Yoshihisa; Sekiguchi, Shunichi; Asai, Kohtaro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital decoding apparatus and method for receiving and decoding a compression-coded digital signal received in predetermined units comprises decoding the compressed digital signal in an arithmetic decoding unit. The received digital signal is coded in every predetermined units with updating a table of probability of occurrence which is assigned for each coding symbol. The arithmetic decoding unit initializes a decoding process when decoding of signal in the predetermined units is started. The initializing is performed based on information of initializing the table of probability of occurrence which is multiplexed on a header of data for the predetermined units and information of …
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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 August 13, 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.
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Timeline
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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.