Speaker recognition system
CA 2003183 C · Owner: Sekisui Kagaku Kogyo Kabushiki Kaisha · Inventors: Miyakawa, Masashi; Nonaka, Shigenobu; Nishimura, Shingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speaker recognition system for recognizing a speaker on the basis of input speech by the use of a neural network provided with a plurality of layers. The variation with time of an inherent characteristic of speech is used as an input to the neural network. Specifically, the variation with time of an average inherent characteristic of speech within a fixed time is used as the input to the neutral network. The inherent characteristics of speech used include a frequency characteristic of speech, a pitch frequency, a frequency characteristic of the speech waveform subjected to high-frequency emphasis; a linear prediction coefficient, and a PARCOR coefficient.
Read the whole patent
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 November 16, 1989 and granted June 18, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2011.
- 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.