Invention Grant
- Patent Title: Conference terminal with echo reduction for a voice conference system
- Patent Title (中): 会议终端与语音会议系统的回音减少
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Application No.: US11622318Application Date: 2007-01-11
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Publication No.: US07853007B2Publication Date: 2010-12-14
- Inventor: Martin Tittel , Manfred Lutzky , Juergen Hupp
- Applicant: Martin Tittel , Manfred Lutzky , Juergen Hupp
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
- Current Assignee Address: DE Munich
- Agency: Dicke, Billig & Czaja, PLLC
- Priority: DE102004033866 20040713
- Main IPC: H04M9/00
- IPC: H04M9/00

Abstract:
A conference terminal for a digital voice conference system comprises a first sound transducer means, which is implemented to generate a microphone signal from an acoustic signal, a second sound transducer means, which is implemented to generate an acoustic signal from a loudspeaker signal, a connecting means, which is implemented to enable a connection between conference terminal and a conference central unit, to receive a composite conference signal from the conference central unit, and a means for echo suppression, which is implemented to combine the microphone signal or a signal derived therefrom in a noise suppression means with a composite conference signal in a listening operation of the conference terminal, such that a loudspeaker signal results, in which the acoustic signal, on which the microphone signal is based, is reduced. Such a conference terminal allows the suppression of a remote own echo and a remote foreign echo, whereby digital wireless voice conference systems can be realized, which ensure high voice quality and noise immunity with minimum wiring effort.
Public/Granted literature
- US20070189507A1 CONFERENCE TERMINAL WITH ECHO REDUCTION FOR A VOICE CONFERENCE SYSTEM Public/Granted day:2007-08-16
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