Systems and methods for audio processing
CA 2621175 C · Owner: Wang, Wen · Inventors: Wang, Wen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods for audio signal processing are disclosed where a , discrete number of simple digital filters (266) are generated for particular portions of an audio frequency range. Studies have shown that certain frequency ranges are particularly important for human ears' locationdiscriminating capability, while other ranges are generally ignored. Head- Related Transfer Functions (HRTFs) (170) are examples response functions that characterize how ears perceive sound positioned at different locations. By selecting one or more "location-critical" portions (172 174) of such response , functions, one can construct simple filters (180) that can be used to simulate hearing where …
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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 September 13, 2006 and granted December 22, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.