Digital video signal decoding apparatus and presumed motion vector calculating method
CA 2099407 C · Owner: Machida, Yutaka · Inventors: Machida, Yutaka; Yukitake, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital video signal decoding apparatus has a memory for storing motion vectors which have been decoded by a decoder, and a motion vector presuming circuit for calculating a presumed motion vector from the motion vectors stored in the memory whereby, even, if a part of a bit stream has been lost and each of pixel blocks which have been lost accordingly cannot be decoded, each of the lost pixel blocks is replaced by a corresponding pixel block in the previous frame which has been motion-compensated through a motion compensation circuit by using the presumed motion vector thereby preventing degradation of the picture quality at that pixel block portion.
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 June 30, 1993 and granted February 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2015.
- 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.