Coding and decoding of audio signals by using intensity stereo and prediction
CA 2260222 C · Owner: Gerhauser, Heinz · Inventors: Herre, Jurgen; Gerhauser, Heinz; Gbur, Uwe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the coding and decoding of stereo audio spectral values both the intensity stereo process, and prediction are used in order to achieve high data compression. If intensity stereo coding is, active in one section of scale factor bands the prediction for the right , channel in that range is deactivated, whereby the results of the prediction are not used to form the coded stereo audio, spectral values. To allow further adaptation of the prediction for the right channel, the, predictor of the right channel is fed with stereo audio spectral values for the channel, which, again are intensity stereo decoded.
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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 June 3, 1997 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.