Error concealment in relation to decoding of encoded acoustic signals
CA 2422790 A1 · Owner: Bruhn, Stefan · Inventors: Bruhn, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the concealment of errors in decoded acoustic signals caused by encoded data representing the acoustic signals being partially lost or damaged during transmission over a transmission medium. In case of lost data or received damaged data a secondary reconstructed signal is produced on basis of a primary reconstructed signal. This signal has a spectrally adjusted spectrum (Z4E), such that it deviates less with respect spectral shape from a spectrum (Z3) of a previously reconstructed signal produced from previously received data than a spectrum (Z'4) of the primary reconstructed signal.
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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 7, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2023.
- 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.