Bi-directional asynchronous telecommunication audio signal processing
CA 2279390 A1 · Owner: Coherent Communications Systems Corp. · Inventors: Bielsker, Barry H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) is provided for digital signal processing of telecommunication signals along respective transmit and receive paths (12b 14b) of a two-way telecommunication link. The respective transmit and receive signals each include an audio data component (SI' RI') and a timing component , (S, R). Digital signal processing of at least one of the signals such as an , echo cancellation, employs information derived from the audio data component of the other signal. To compensate for differences between the respective timing components of the signals, re-synchronization of each signal in terms of the timing component of the other signal is performed prior to modifying the audio data …
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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 2, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2019.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.