Transcoder and code conversion method
CA 2504174 A1 · 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
An inter-conversion transcoder includes: a spectrum parameter calculation circuit (100) for calculating a spectrum parameter for a signal x(n) obtained by decoding a first code; a coefficient calculation circuit (130) for receiving a spectrum parameter and converting it into a coefficient of the signal subjected to band extension; a noise generation circuit (120) for outputting a noise signal whose band is limited; a gain circuit (140) for multiplying the output signal of the noise generation circuit by a gain; a combining filter circuit (170) for receiving the output signal from the noise generation circuit (120) and the coefficient from the coefficient calculation circuit (130) …
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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 October 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2025.
- 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
Timeline From CIPO dates
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.