04574304 is referenced by 78 patents and cites 3 patents.

The invention relates to an audience rating measuring system for a television and a video tape recorder and provides an audience rating measuring system which can give accurate audience data under various conditions, such as when a television and a video tape recorder are used in combination, that can not be measured by the conventional audience rating measuring systems in general use. The audience rating measuring system of the invention comprises means for video tape recorder channel discrimination, video tape recorder operation mode discrimination, and television channel discrimination.

Title
Audience rating measuring system for television and video tape recorder
Application Number
6/602404
Publication Number
4574304
Application Date
April 20, 1984
Publication Date
March 4, 1986
Inventor
Yoshikazu Itoh
Kunitachi
JP
Fumio Watanabe
Zama
JP
Agent
Roberts Spiecens & Cohen
Assignee
Video Research
JP
IPC
H04N 17/06
H04N 17/04
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