Matrix improvements to lossless encoding and decoding
CA 2859333 A1 · Owner: Dolby Laboratories Licensing Corporation · Inventors: Craven, Peter Graham; Stuart, John Robert; Law, Malcolm James
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. …
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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. No grant is recorded for it in Canada; had it been granted, its 20-year term would have 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.