Adaptive quantization coder/decoder with limiter circuitry
CA 2023543 C · Owner: Ohira, Hideo · Inventors: Kato, Yoshiaki; Murakami, Tokumichi; Ohira, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
12-, ABSTRACT OF THE DISCLOSURE:, An adaptive quantization coder/decoder characterized by providing a limiter in a quantizqtion coding module so that a reconstruction value of a quantization level is not in excess of a predetermined allowable range or providing, a limiter in a local quantization decoding module so that an output signal level falls within a predetermined allowable range, or providing a limiter in a quantization decoding module so that the output signal level falls within the predetermined allowable range.
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 August 17, 1990 and granted July 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2012.
- 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.