Conference terminal comprising echo reduction for a voice conferencing system
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.
Term
Term ended
Projected expiry passed 11 July 2025, 1.2 years ago.
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16 members in 10 offices
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 102004033866 | Germany | A |
Members16
| Document | Office | Kind | |
|---|---|---|---|
| CA2572890A1 | Canada | A1 | |
| WO2006005566A1 | World Intellectual Property Organization (WIPO) | A1 | |
| DE102004033866A1 | Germany | A1 | |
| DE102004033866B4 | Germany | B4 | |
| EP1745637A1 | European Patent Office (EPO) | A1 | |
| US2007189507A1 | United States of America | A1 | |
| EP1745637B1 | European Patent Office (EPO) | B1 | |
| AT408960T | Austria | T | |
| ATE408960T1This record | Austria | T1 | |
| DE502005005405D1 | Germany | D1 | |
| PT1745637E | Portugal | E | |
| DK1745637T3 | Denmark | T3 | |
| ES2314691T3 | Spain | T3 | |
| PL1745637T3 | Poland | T3 | |
| CA2572890C | Canada | C | |
| US7853007B2 | United States of America | B2 |
Numbers
- Application
- 5774310
Titles2
- German
- KONFERENZ-ENDGERÄT MIT ECHOREDUKTION FÜR EIN SPRACHKONFERENZSYSTEM
- English
- CONFERENCE TERMINAL WITH ECHO REDUCTION FOR A VOICE CONFERENCE SYSTEM
Classification
- CPC, 4
- H04M3/56
- H04M3/002
- H04M3/568
- H04M9/082