Picture coding apparatus
CA 2028947 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Murakami, Tokumichi; Matsuzaki, Kazuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the invention a coding controller takes a, buffer occupancy at present from a transmission buffer and first normalized value evaluating means outputs a first normalized value being independent of a video rate and a frame rate for the number of bits per n x QB and second normalized value evaluating means outputs a second normalized value for the number of bits per one frame. When the number of bits is relatively small a, second quantization characteristics control table is selected in a selector and the coding control every frame is performed. When the number of bits is large a first quantization characteristics control table is selected in the selector and the control every n x QB is …
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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 30, 1990 and granted April 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.