Audio codec post-filter
CA 2609539 C · Owner: Chen, Wei-Ge · Inventors: Wang, Tian; Khalil, Hosam A.; Chen, Wei-Ge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Techniques and tools are described for processing reconstructed audio signals. For example, a reconstructed audio signal is filtered in the time domain using filter coefficients that are calculated at least in part, in the frequency , domain. As another example producing a set of filter coefficients for filtering a reconstructed audio signal includes clipping one or more peaks of a set of coefficient values. As yet another example for a sub-band codec, in , a frequency region near an intersection between two sub-bands a reconstructed , composite signal is enhanced.
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 5, 2006 and granted March 29, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2026.
- 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.