Optical disc, optical disc recording method and apparatus, and optical disc reproducing method and apparatus
CA 2268409 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Murase, Kaoru; Tsuga, Kazuhiro; Okada, Tomoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an optical disc reproducible with a reproducing apparatus having still picture data and audio data which are reproduced simultaneously. The still picture data is stored in a video part stream (ST1) comprising a plurality of units and the audio data is stored in a second system stream (ST2) comprising one or a plurality of units. The units store time stamp information so that the second system stream (ST2) follows immediately after the video part stream (ST1). By changing the data in the second system stream (ST2) the audio data presented with a still picture can be freely and easily changed even after recording the still picture data using an MPEG …
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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, 1999 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2021.
- 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.