Process for reducing frequency interlacing during acoustic or optical signal transmission and/or recording
CA 2118915 C · Owner: Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. · Inventors: Edler, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The intention relates to a method for reducing frequency crosstalk in the trans-, mission of digitized audio signals. Frequency crosstalk must always be expected if the subdivision of the input signal, takes place on partial bands in series-connected stages. In the method according to, the invention signals from partial bands in which spectral components of specific, frequencies occur as signal components and signals from partial bands in which said, spectral components occur as crosstalk components in the stop range undergo a weighted summation. Following transmission the partial band signals undergo , an, inverse operation to the weighted summation. The method operates independently …
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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 October 6, 1992 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2014.
- 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.