The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2015
Filed:
Oct. 19, 2011
Zhigang Zhang, Beijing, CN;
Xiaojun MA, Beijing, CN;
Ashwin S. Kashyap, Mountain View, CA (US);
Thomson Licensing, Issy les moulineaux, FR;
Abstract
A system for program information discovery is described. A method and a device for generating and inserting a watermark for such program information discovery into a program signal to be rendered are disclosed, along with the corresponding method and device for watermark detection and decoding from the rendered program signals. Watermark, which carries channel/program information, is encoded and embedded at the set top box where the program streams are received and decoded for rendering. Second screen devices are employed for watermark detection and decoding by capturing the render program signals which has the watermark embedded. The extracted watermark information may be sent to information servers for more detailed channel/program information.