Video noise reduction apparatus and method using three dimensional discrete cosine transforms and noise measurement
CA 2118978 A1 · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Tran, Jimmy C.; Naimpally, Saiprasad V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A noise component of a video signal is reduced by using a three dimensional discrete cosign transform (3-D DCT) to determine the time frequency spectrum of both the video signal and the noise component subtracting the time frequency spectrum of the noise component from the time frequency spectrum of the video signal, and converting the time frequency spectrum of the modified video signal back to the spatial time domain by using an inverse 3-D DCT.
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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 March 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.