Speech codec employing speech classification for noise compensation
CA 2598689 C · Owner: Macom Technology Solutions Holdings, Inc. · Inventors: Su, Huan-Yu; Benyassine, Adil; Thyssen, Jes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of encoding an input speech signal using a multi-rate encoder having a , plurality of encoding rates is disclosed. A high-pass filter and then a perceptual weighting , filter are applied to such signal to generate a first target signal. An adaptive codebook , vector is identified from an adaptive codebook using the first target signal by filtering the , vector to generate a filtered adaptive codebook vector. An adaptive codebook gain for the , adaptive codebook vector is calculated and an error signal minimized. The adaptive , codebook gain is adaptively reduced based on one encoding rate from the plurality of , encoding rates to generate a reduced adaptive codebook gain. A …
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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 24, 1999 and granted July 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2021.
- 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.