Audio encoding apparatus and audio decoding apparatus
CA 2233146 C · Owner: Nomura, Toshiyuki · Inventors: Nomura, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An auxiliary multi-pulse setting circuit sets candidates of pulse positions so that the pulse positions to which no pulse is located are selected in an auxiliary multi- pulse searching circuit prior to the pulse positions at which pulses have already been encoded in a multi-pulse searching circuit. The auxiliary multi-pulse searching circuit generates an auxiliary multi-pulse signal according to the candidates of pulse positions set in the auxiliary multi-pulse setting circuit and encodes the auxiliary multi-pulse signal so that difference between the reproduced audio signal which is obtained by driving a linear predictive synthesis filter with the auxiliary multi-pulse signal and an input …
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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 March 26, 1998 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.
Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.