Matrix improvements to lossless encoding and decoding
CA 2365529 C · Owner: Meridian Lossless Packing Limited · Inventors: Stuart, John Robert; Law, Malcolm James; Craven, Peter Graham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lossless encoder and decoder are provided for transmitting a multichannel signal on a medium such as DVD-Audio. The encoder accepts additionally a downmix specification and splits the encoded stream into two substreams such , that a two-channel decoder of meagre computational power can implement the downmix specification by decoding one substream while a multichannel decoder , can decode the original multichannel signal losslessly using both substreams. Further features provide for efficient implementation on 24-bit processors for confirmation of lossless reproduction to the user and for benign , behaviour in the case of downmix specifications that result in overload. The principle …
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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 April 7, 2000 and granted August 30, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2022.
- 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
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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.