Apparatus for processing auxiliary information in an extended definitionwidescreen television system
CA 1309164 C · Owner: Isnardi, Michael A. · Inventors: Isnardi, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An NTSC compatible, single broadcast channel widescreen EDTV system encodes and decodes a television signal comprising: (1) a main, standard format NTSC signal with low frequency side panel image information compressed into the overscan regions thereof; (2) a time expanded high frequency side panel image information component; (3) an extended high frequency horizontal,luminance image information component. Components (2) and (3) quadrature modulate an alternate subcarrier other than a chrominance subcarrier, having an alternating phase unlike that of the chrominance subcarrier.
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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 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.
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.