A method for improving performance of a voice coder
CA 2246901 C · Owner: Park, Ho-Chong · Inventors: Park, Ho-Chong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for improving performance of voice coder comprises the steps of: calculating a target signal for a window; and searching candidate optimal codebooks and candidate optimal codebook gains from the target signal for the window, all codebook indices and all codebook optimal gains. This method further has the steps of: calculating target signals for a second subframe from the target signal for the window and candidate optimal codebooks and candidate optimal codebook gains for a first subframe; searching candidate optimal codebooks and candidate optimal codebook gains for the second subframe from the target signal for the second subframe and candidate optimal codebooks and candidate …
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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 September 10, 1998 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2020.
- 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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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.