Television signal digitizing method
CA 2113755 C · Owner: Nippon Television Network Corporation · Inventors: Tanaka, Masakatsu; Hori, Akihiro; Kurosaki, Tadao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a television signal digitizing method enabling to further reduce information quantity without deterioration of image quality when digitizing progressive-scanned signals. More the present invention comprises: a step of dividing a progressive-scanned information into two complementary interlaces that is an interlace 1 and an interlace 2; a step of converting a luminance information in said interlace 1 to digital information of which sampling frequency is X; a step of converting a chrominance information in said interlace 1 to digital information of which sampling frequency is Y; and a step of generating a supplementary information.
Read the whole patent
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 January 19, 1994 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2016.
- 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
Timeline From CIPO dates
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.