Moving image signal coding system
CA 1320563 C · Owner: Nec Corporation · Inventors: Hatori, Yoshinori; Kosugi, Yasuhiro; Kato, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system of coding moving image signals for producing a predictive error signal by a predictive coding based on inter-frame correlation and quantizing by a quantization unit the produced predictive error signal for each block of a picture frame constituted by N lines of M pixels includes a block coding/non-coding decision unit for calculating a first evaluation value Sm of the predictive error signal for each block of the picture frame and deciding that a block non-coding is applicable when the first evaluation value Sm is less than a first threshold value T1 , and deciding that a block coding is applicable when the first evaluation value Sm is greater than the first threshold value T1. The …
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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 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 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.
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.