System for integrating digital audio and analog video to provide seamless user transparent features
CA 2180045 C · Owner: Google Technology Holdings Llc · Inventors: Nasuti, Tony; Robbins, Clyde; Maraska, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The cable television digital audio system of the present invention provides seamless reception and integration of analog video and audio programs and digital audio programs. The system comprises a settop terminal with a digital audio module for receiving an RF modulated digital data stream. The settop terminal permits the simultaneous reception of analog video and audio broadcasts and digital audio broadcasts. The digital audio module may include a separate frequency agile RF tuner enabling both the settop terminal and digital audio module to be tuned to and reproduce separate programs. A television monitor receiver displays normal video programming from the settop terminal and also …
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 June 27, 1996 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2018.
- 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.