Subband encoding and decoding system for data compression and decompression
CA 2314421 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Taniguchi, Shohei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A subband encoding and a decoding system are provided. The subband encoding system measures signal levels of subband signals to determine scale factors to obtain scale factor information and produces bit allocation information based on the scale factor information, scale factor flag information indicating the fact that the scale factor information has changed from that one frame earlier and updated scale factor information indicating the scale factor information which has changed from that one frame earlier. The subband encoding system re-quantizes the subband signals using the scale factor information and the bit allocation information to provide re-quantized output signals and constructs …
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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 July 25, 2000 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2022.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.