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Method and apparatus for automatically identifying a program including a sound signal    
United States Patent5581800   
Link to this pagehttp://www.wikipatents.com/5581800.html
Inventor(s)Fardeau; Michel (Les Milles, FR); Briend; Michel (Roquevaire, FR); Tommasi; Marc (Ventabren, FR); Galant; Serge (Aix-en-Provence, FR)
AbstractA method and apparatus for automatically identifying a program broadcast by a radio station or by a television channel, or recorded on a medium, by adding an inaudible encoded message to the sound signal of the program, the message identifying the broadcasting channel or station, the program, and/or the exact date. In one embodiment the sound signal is transmitted via an analog-to-digital converter to a data processor enabling frequency components to be split up, enabling the energy in some of the frequency components to be altered in a predetermined manner to form an encoded identification message, and with the output from the data processor being connected via a digital-to-analog converter to an audio output for broadcasting or recording the sound signal. In another embodiment, an analog bandpass filter is employed to separate a band of frequencies from the sound signal so that energy in the separated band may be thus altered to encode the sound signal. The invention is particularly applicable to measuring the audiences of programs that are broadcast by radio or television, or that are recorded.
   














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Drawing from US Patent 5581800
Method and apparatus for automatically identifying a program including a sound signal - US Patent 5581800 Drawing
Method and apparatus for automatically identifying a program including a sound signal
Inventor     Fardeau; Michel (Les Milles, FR); Briend; Michel (Roquevaire, FR); Tommasi; Marc (Ventabren, FR); Galant; Serge (Aix-en-Provence, FR)
Owner/Assignee     The Arbitron Company (Columbia, MD)
Patent assignment
All assignments
Publication Date     December 3, 1996
Application Number     08/476,499
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     June 7, 1995
US Classification     455/2.01 725/18 725/19
Int'l Classification     H04H 009/00
Examiner     Eisenzopf; Reinhard J.
Assistant Examiner     Sobutka; Philip J.
Attorney/Law Firm     Flanagan, III; Eugene L. Curtis, Morris & Safford, P.C.,
Address
Parent Case     This application is a division of application Ser. No. 08/360,990 filed Dec. 20, 1994 which is a continuation of application Ser. No. 07/936,111, filed Aug. 27, 1992.
Priority Data     Sep 30, 1991[FR]91 11989
USPTO Field of Search     455/2 455/100 455/68 455/103 348/1 348/2 348/907
Patent Tags     automatically identifying program including a sound signal
   
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