최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0476499 (1995-06-07) |
우선권정보 | FR-0011989 (1991-09-30) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 383 인용 특허 : 0 |
A 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
A 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.
An apparatus for recovering an identification message encoded into an analog sound signal forming at least a part of a program, the identification message being encoded by modulating the energy of a component of a digitized sound signal in at least one band of audible frequencies thereof, the analog
An apparatus for recovering an identification message encoded into an analog sound signal forming at least a part of a program, the identification message being encoded by modulating the energy of a component of a digitized sound signal in at least one band of audible frequencies thereof, the analog sound signal being reproduced by a loudspeaker, comprising: an enclosure carryable on a person, microphone means within the enclosure for converting the analog sound signal reproduced by said loudspeaker into an electrical sound signal, means within the enclosure for detecting modulations in the energy of the electrical sound signal in said at least one band of audible frequencies, means within the enclosure for retrieving the identification message from the detected modulations, carry detection means for determining whether said apparatus is being carried by a person, and means within the enclosure for storing the identification message and for storing an indication of such determination whether said apparatus is being carried by a person.
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