Method and apparatus for introducing reference impairments into video signals
CA 2256197 C · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: Quacchia, Marco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus are provided for introducing reference impairments into pictures to be used in subjective tests on digital video signals in compliance with ITU-T Recommendation P.930. The method generates blockiness distortion and/or edge busyness distortion. For the first distortion areas close to picture edges are selected and through a movement characteristics analysis blocks are identified that belong to said areas and that are concerned only by the actual movement of the subject and for blocks chosen among the identified ones the luminance value is replaced by a value linked to the individual pixel luminance and to the average block luminance value. For the second distortion …
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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 December 15, 1998 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2020.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.