Method and apparatus for recording compressed audio data on a video recording medium
CA 2071595 C · Owner: Kanota, Keiji · Inventors: Kanota, Keiji; Inoue, Hajime; Kubota, Yukio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Video and audio data are recorded onto video and audio signal recording areas of a track of a record medium these areas, being included either in one of several segments in the track or the track being comprised of only a single segment of video and audio signal recording areas. Audio data that is supplied at substantially the same time as the video data is compressed and recorded in a first audio sector of the audio signal recording area. Then, depending upon whether a first or second audio signal recording mode is selected, either compressed audio data which is derived from the audio data supplied at substantially the came time as the video data or independent compressed audio data is …
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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 June 18, 1992 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2014.
- 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.