Method and apparatus for coding signal while adaptively allocating number of pulses
CA 2201217 C · Owner: Ozawa, Kazunori · Inventors: Ozawa, Kazunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal coding apparatus includes a signal-dividing section for dividing an input signal in units of frames and in units of bands, a pulse-allocating section for determining a performance request value for each of the bands, for determining a number of pulses for each of the bands from the performance request value for the band and, for adaptively allocating the determined numbers of pulses to the bands for every frame, and includes a plurality of coding circuits respectively provided for the bands. Each of said plurality of coding circuits generates a transmission signal for a corresponding band for every frame based on the number of pulses allocated to the corresponding band.
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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 27, 1997 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- 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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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.