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Expired Canadian patentCanada

Widescreen television signal processor system with interpolator for reducing artifacts

CA 1323690 C · Owner: General Electric Company · Inventors: Dieterich, Charles B.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An NTSC compatible widescreen EDTV system encodes a television signal via a process including intraframe averaging of mutually exclusive successive paired groups of image pixels above a given frequency. At a decoder intraframe averaged luminance image information is interpolated on a line-by-line basis to help reduce unwanted jagged diagonal image artifacts. Vertical peaking is associated with intraframe averaging at the encoder.

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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 October 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 17, 1989
GrantedOctober 26, 1993
Term endedOctober 26, 2010
Patent numberCA 1323690 C
Classification (IPC)H04N11/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 17, 1989Patent grantedOct 26, 1993Term endedOct 26, 2010

Sources & verification

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