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:
Aug. 16, 1988
Filed:
May. 05, 1987
Applicant:
Inventor:
Carl M Solar, Largo, FL (US);
Assignee:
A. C. Nielsen Company, Northbrook, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04H / ;
U.S. Cl.
CPC ...
358 84 ;
Abstract
A system and method are provided for determining the broadcast signal source for the signal being displayed by a video wave receiver, whether tuned by the monitored receiver or an associated tuner device, such as a cable converter or video cassette recorder. The monitoring system includes a probe for detecting a horizontal sweep signal of the monitored receiver. The frequency of the detected horizontal sweep signal is determined and compared to stored characteristic frequency values corresponding to the predetermined channels to which the video receiver may be tuned.