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:
Apr. 30, 1996
Filed:
Oct. 12, 1993
Mark A Wheatley, Maidenhead, GB;
Peter Wilcox, Roehampton, GB;
Taylor Nelson AGB plc, London, GB;
Abstract
A system for identifying a program stream being displayed at a receiver location comprises means at a central station for measuring the relative luminance of a plurality of predetermined areas in each frame and recording that data with their times of occurrence for each of a plurality of program streams as reference data, and means at a receiver location to measure the relative luminance of the same areas but at a repetition rate less than that at the central station for a given time after a channel change and thereafter at an even lower repetition rate and storing the measurements at the receiver location with times defining corresponding broadcast times, and means for transmitting the stored data to the central station for correlating the measured and reference data using the recorded times to access the corresponding measured values of the recorded and reference data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile