WO/2006/020560 is referenced by 13 patents.

Methods and apparatus to monitor audio/visual content from various sources are disclosed. An example method to monitor media content provided by a selected one of a plurality of media content sources for presentation by an information presenting device disclosed herein comprises determining first information based on a video signal corresponding to the monitored media content, determining second information based on an audio signal corresponding to the monitored media content, identifying the selected one of the plurality of media content sources based on a first classification decision resulting from one of the first information and the second information and a second classification decision resulting from the other of the first information and the second information, and identifying the monitored media content based on identification information associated with at least one of the video signal or the audio signal.

Title
Methods and apparatus to monitor audio/visual content from various sources
Application Number
PCT/US2005/028106
Publication Number
2006/020560
Application Date
August 9, 2005
Publication Date
February 23, 2006
Inventor
Ramaswamy Arun
Agent
FLIGHT James A
Assignee
Ramaswamy Arun
Nielsen Media Research
IPC
H04N 07/16
H04N 09/00
View Original Source