Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters
CA 2992125 C · Owner: Dolby Laboratories Licensing Corporation · Inventors: Davis, Mark Franklin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods of audio signal processing are provided that relate to improved upmixing whereby N audio channels are derived from M audio channels and spatial parameters. The solution involves introducing uncorrelated signal components into correlated upmix signal components in response to spatial parameters which are interpolated over time. This can be used for example, for generating an N channel upmix from M channels and spatial parameters.
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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 February 28, 2005 and granted September 25, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.