Video signal processing apparatus
CA 2046049 C · Owner: Fujimori, Toshimitsu · Inventors: Kawakami, Toshikatsu; Fujimori, Toshimitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a video signal processing apparatus which can be used when a video signal which is transmitted is displayed onto a screen or a CRT having an aspect ratio (e.g. 9: 16) different from an aspect ratio (e.g. 4: 3) of the video signal. In the invention, when the video signal is time base compressed and displayed onto the screen or CRT a memory, to store the digital converted video signal is used the video signal is written into the memory every two scan periods and is read out of the memory every two scan periods, thereby executing the double-speed scan conversion and also enabling the time base compression to be performed. The optimum display state of video signals of …
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 July 2, 1991 and granted September 17, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2013.
- 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.