Multipoint video conference controlling method and system capable of synchronizing video and audio packets
CA 2196948 C · Owner: Fukuoka, Hideyuki · Inventors: Fukuoka, Hideyuki; Mizuno, Hiromi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a multipoint video conference controlling system which is supplied with video packets and audio packets from conference terminals which multiplexes the video packets to produce a composite packet and, mixes the audio packets to produce a mixed audio packet a sequence number, collating device collates the sequence numbers of the video packets and the audio packets to produce a coincidence signal when the sequence numbers of the video packets and the audio packets coincide with each other. Video and audio transmitting devices transmit synchronously the composite packet and the mixed audio packet in response to the coincidence signal. The multipoint video conference controlling system may …
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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 February 6, 1997 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2019.
- 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.