Method for coding an audio signal digitalized at a low sampling rate
CA 2241453 C · Owner: Sieler, Martin · Inventors: Brandenburg, Karlheinz; Buchta, Rainer; Sieler, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method for coding an audio signal digitalized at a low sampling rate a respective number of successive frequency lines of the digitalized audio signal which are assigned to a scale factor band are coded with the same scale factor successive scale factor bands forming a region within which all the scale factor bands are coded with the same number of bits, which is determined according to the largest scale factor of the region. The frequency lines of at least the highest region of scale factor bands are coded with the scale factor 0. No scale factor is coded for at least the highest region.
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 February 19, 1997 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2019.
- 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.