Speech/non-speech frame discriminator and method for discriminating between speech/non-speech frames
CA 2375330 A1 · Owner: Serizawa, Masahiro · Inventors: Serizawa, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When judging, for each preset section, whether an input signal is voice or other than voice, a single algorithm is used for judging even when a plurality of kinds of input signal frequency band and section length are available. A unit length division circuit (20) divides a signal from an input terminal (10) into unit lengths (e.g. 2.5 msec) shorter than a frame length (e.g. 10 msec) for transfer to a band conversion circuit (30). The band conversion circuit (30) restricts a frequency band provided by an input signal having a frame length given by the unit length division circuit (20) to a frequency band that can be detected by a detection circuit (40) for transfer to the detection …
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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 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2022.
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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.