Encoding system and decoding system for audio signals
CA 2194199 C · Owner: Takamizawa, Yuichiro · Inventors: Iwadare, Masahiro; Takamizawa, Yuichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An encoding system comprises an input terminal for receiving an input signal a signal converting portion for converting the input signal into frequency-domain signals and grouping several frequency-domain signals into blocks an analyzing portion for analyzing the input signal and the frequency-domain signals and obtaining an allowable error a selecting portion for selecting one of a plurality of quantizing portions that quantizes frequency-domain signals of each block corresponding to the allowable error a plurality of quantizing portions for quantizing frequency-domain signals corresponding to selection information and calculating amplitude information and codes a multiplexing portion for …
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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 December 31, 1996 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 31, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 31, 2018.
- 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.