Highly efficient coding apparatus
CA 2005347 C · Owner: Sony Corporation · Inventors: Kondo, Tetsujiro; Nagai, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention lies in a highly efficient coding apparatus configured to break a digital picture signal into picture blocks and in receipt of, a signal from a coding circuit for performing variable-length coding for each picture block generate an output signal whose sync blocks are serial. By inserting the most significant bit of a coding output signal for each picture element in a predetermined position of the sync block a reproduced, picture is obtained also in the picture search mode in which the head scans a tape across a plurality of tracks.
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 December 13, 1989 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2011.
- 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.