Transmitting device, receiving device, system and method for transmitting image at high efficiency
CA 2129464 C · Owner: Ando, Kazuhiro · Inventors: Ohmi, Shinichiro; Imai, Hiroyuki; Ando, Kazuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmitting device encodes an animated image by detecting a difference between one image frame and a reference image frame, then transmits the encoded image to a receiving device by a radio line at high efficiency. The transmitting device comprises an image storing unit for storing the reference image frame, an initialization unit for initializing the image storing unit, a difference encoding unit for detecting and encoding the difference, an encoded data storing unit for storing the encoded difference a transmitting unit, for detecting an error detection code in the encoded difference, and transmitting the encoded difference together with transmission information including the error …
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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 August 4, 1994 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 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.