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Expired Canadian patentCanada

Method and arrangement of adaptively multiplexing data of a plurality ofvideo channels

CA 2077521 C · Owner: Nec Corporation · Inventors: Shiojiri, Hirohisa; Koga, Toshio

CIPO record

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Abstract From the Canadian patent

A method of adaptively multiplexing a plurality of video channel data is disclosed. A multiplexed data includes a plurality of frames each of which contains a plurality of sub-frames. The video channel data are adaptively allocated to the sub-frames. A memory occupancy value of a buffer, which is provided in each of a plurality of video channels, is determined. The buffer is arranged to receive the corresponding video information. A plurality of control signals are produced each of which indicates the memory occupancy value of the corresponding buffer. Following this, a look-up table is accessed which includes a plurality of video channel assignment data for assigning the video channel data …

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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 September 3, 1992 and granted October 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 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.
FiledSeptember 3, 1992
GrantedOctober 6, 1998
Term endedSeptember 3, 2012
Patent numberCA 2077521 C
Classification (IPC)H04N11/02 +2 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedSep 3, 1992Patent grantedOct 6, 1998Term endedSep 3, 2012

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.