[특허]Voice-actuated switching system

Voice-actuated switching system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04M-003/56
출원번호	US-0362034 (1982-03-25)
발명자 / 주소	Lee Byung H. (Hazlet NJ) Lynch Jr. John F. (Summit NJ)
출원인 / 주소	Bell Telephone Laboratories, Incorporated (Murray Hill NJ 02)
인용정보	피인용 횟수 : 42 인용 특허 : 0

초록 ▼

A voice-actuated switching system selectively connects multiple microphones to an audio line in accordance with the output signal levels from each of the microphones. The state of each microphone is determined by its use and can exit in one of three states: selected, mixed, or off. The microphone with the greatest output signal level at any given time is considered in the selected state and is selected for connecting to the audio line with no loss. Those microphones in the mixed state have their output signal levels attenuated before being connected to the audio line. And those microphones in the off state have their outputs essentially disconnected from the audio line. The user of a microphone while in the mixed state can be heard along with the user of a microphone while in the selected state although at a lower level. Improved accuracy is obtained in the microphone selection process by comparing the microphone signals to each other and to a reference level that takes into account any offsets induced into the signals by the system. The system can accommodate any number of microphones.

대표청구항 ▼

A voice-actuated switching system for selectively connecting speech signals from a plurality of speech circuits to an output line, the system comprising: a plurality of circuits for generating speech signals; comparison means automatically operative in response to the signals from the speech circuits for selecting that one of the signals having the greatest magnitude; means for connecting the selected one of the signals to the output line at an unattenuated level and for connecting unselected signals to the output line at an attenuated level; and the comparison means determining the signal with the greatest magnitude by comparing the signals both with reference to each other and with reference to a ground potential, the comparing of the signals with the ground potential providing a means for nulling any extraneous signals being induced in the speech signals in determining the selected one of the speech signals.

이 특허를 인용한 특허 (42)

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Pocino, Michael A.; Truong, Kwan K., Digital linking of multiple microphone systems.
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Thapa, Mukund, Individual adjustment of audio and video properties in network conferencing.
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Cooper, Frederick J., Method and apparatus for controlling a video camera in a video conferencing system.
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Truong, Kwan K.; Chu, Peter; Pocino, Michael A., Stereo microphone processing for teleconferencing.
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Giacopelli, James N.; McElroy, James D.; Taylor, Thomas M., Stored program power control system for improving energy efficiency for telephone sets connected into a local telephone communications system.
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MacDonald, Alan J.; Dunn, Chris A.; Baldino, Brian J., System and method for controlling video data to be rendered in a video conference environment.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Voice-actuated switching system 원문보기

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