Virtual channel table for a broadcast protocol and method of broadcasting and receiving broadcast signals using the same
CA 2776655 C · Owner: Lg Electronics Inc. · Inventors: Kim, Jin Pil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of broadcasting using a virtual channel table in a broadcasting protocol comprises, if a virtual channel is an inactive channel, omitting a corresponding service location descriptor from the virtual channel table to indicate that the virtual channel is inactive. The method includes transmitting the virtual channel table to a receiver and determining whether the virtual channel is inactive based on the presence of a service location descriptor in the virtual channel table by parsing the virtual channel table. The inactive channel is a channel that is not presently carrying a broadcast program but is scheduled to carry a broadcast program at a predetermined later time from …
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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 6, 2000 and granted November 24, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2022.
- 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.