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Expired Canadian patentCanada

Digital signal processor

CA 1311063 C · Owner: Murakami, Tokumichi · Inventors: Wakabayashi, Takao; Ohira, Hideo; Kinjo, Naoto

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

The present invention improves a digital signal processor, more particularly, calculation methods for motion compensation in reduceing a required amount of calculations when an amount of distortion between a last frame block and a current frame block; in processing a direct memory access at a higher efficiency; in processing a subdivided data calculation at a higher speed; in processing a branch instruction occurring in the pipeline process at a higher efficiency; and in processing an interruption occurring in a repeat process operation at greater convenience, and furthermore in reducing a required amount of calculations through minimum distortion searching processes hierarchized.

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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 December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 12, 1989
GrantedDecember 1, 1992
Term endedDecember 1, 2009
Patent numberCA 1311063 C
Classification (IPC)H04N7/26 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJuly 12, 1989Patent grantedDec 1, 1992Term endedDec 1, 2009

Sources & verification

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