Compressed domain encoding apparatus and methods for use with media signals
CA 2878766 C · Owner: The Nielsen Company (Us), Llc · Inventors: Price, Lois; Ramaswamy, Arun; Cooper, Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of watermarking a digital media signal is disclosed. The method includes: copying , compressed audio packets associated with an audio stream included in a transport stream of the , digital media signal into respective frames of compressed audio data to be watermarked to , include media identification information; prior to applying a watermark to the frames of the , compressed audio data, evaluating program information associated with the transport stream to , determine whether a composition of the transport stream has changed during copying of the , compressed audio packets into the respective frames of the compressed audio data; and if the , composition of the transport …
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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 April 19, 2005 and granted October 3, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.