Encryption of a compressed video stream
CA 2438599 C · Owner: Chaubert, Eric · Inventors: Chaubert, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for encrypting a compressed video stream comprising independent data blocks and differential data blocks includes the steps of encrypting the independent data , blocks with a different level of encryption than that used for the differential data blocks. , In one embodiment the differential data blocks are unencrypted. The method allows the , reception of a compressed data stream using powerful algorithms on terminals having , small cryptographic capacities.
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 February 25, 2002 and granted September 20, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2024.
- 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.