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Expired Canadian patentCanada

Video signal decoding system having a frame synchronizer function

CA 1330599 C · Owner: Nec Corporation · Inventors: Koga, Toshio

CIPO record

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Abstract From the Canadian patent

A decoding system according to the invention dispenses with an externally arranged frame synchronizer by incorporating the function of the frame synchronizer into the decoding system itself. The decoding system decodes coded video signals coded by a predetermined coding algorithm, and supplies decoded video signals. It includes a buffer memory for temporarily storing the coded video signals. A frame sync signal detector detects frame sync signals out of the video signals temporarily stored in the buffer memory and generates sync detection signals. A reference sync signal detector detects reference sync signals provided from outside and generates reference sync detection signals. A decoder …

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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

  • Granted July 5, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 27, 1989
GrantedJuly 5, 1994
Term endedJuly 5, 2011
Patent numberCA 1330599 C
Classification (IPC)H04N7/12 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJune 27, 1989Patent grantedJuly 5, 1994Term endedJuly 5, 2011

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