Audio coding system using characteristics of a decoded signal to adapt synthesized spectral components
CA 2736065 C · Owner: Dolby Laboratories Licensing Corporation · Inventors: Fellers, Matthew Conrad; Vinton, Mark Stuart; Truman, Michael Mead
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A receiver in an audio coding system receives a signal conveying frequency subband signals representing an audio signal. The subband signals are examined to assess one or more characteristics of the audio signal. Spectral components are synthesized having the assessed characteristics. The synthesized spectral components are integrated with the subband signals and passed through a synthesis filterbank to generate an output signal. In one implementation the assessed characteristic is temporal shape and noise-like spectral components are synthesized having the temporal shape of the audio signal.
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 June 9, 2003 and granted February 10, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2025.
- 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.