Apparatus for concealing errors in a digital video processing system
CA 2123089 C · Owner: Sun, Huifang · Inventors: Sun, Huifang; Zdepski, Joel Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital video signal processing system includes apparatus for concealing errors which might occur in reproduced images due to image data lost during signal transmission. The system includes circuitry for detecting transmitted video data (20-24) gen-, erating error signals if errors are present in segments (transport blocks) of the received data (25), and excising segments having errors from the data stream. The received data is applied to a decoder/decompressor system (26, 27) which decodes and decompresses the transmitted video data according to a predetermined sequence. The decompressed video data may be applied to a memory (318) for subsequent display, recording etc. The …
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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 October 13, 1992 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2014.
- 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
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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.