Coding process
CA 2108254 C · Owner: Deutsche Thomson-Brandt Gmbh · Inventors: Hepper, Dietmar; Herpel, Carsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
With the coding of picture signals, motion vectors are often determined for blocks of picture elements. A method is described in EP 0 414 113 which explains how a zoom aid pan vector can be generated for always a complete picture from an array of motion vectors for blocks of picture elements. With a format conversion of picture signals which are sub-sampled at least vertically prior to the coding motion, parameters valied for always a complete picture are used in order to gain a maximum local resolution after the subsampling. Only the remaining, incompletely motioncompensated parts of the picture are detected by a simple alteration detector and vertically filtered in the field.
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 April 4, 1992 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2014.
- 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.