Speech recognition
CA 2202656 C · Owner: British Telecommunications Public Limited Company · Inventors: Ringland, Simon Patrick Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speech recogniser in which the recognition vocabulary is generated from a user's own speech by forming phonemic transcriptions of the user's utterances and using these transcriptions for future recognition purposes. The phonemic transcriptions are generated using a loosely constrained network preferably , one constrained only by noise. The resulting transcriptions therefore bear close resemblance to the user's input speech but require significantly reduced storage requirements compared to known speaker dependent word representations.
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 1, 1995 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2017.
- 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.