Waveform speech synthesis
CA 2189666 C · Owner: British Telecommunications Public Limited Company · Inventors: Lowry, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Portions of speech waveform are joined by forming extrapolations at the end of one and the beginning of the next portion to create an overlap region with synchronous pitchmarks and then forming a weighted sum across the overlap to provide a smooth transition.
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 April 3, 1996 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2018.
- 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.