公开(公告)号：WO2007114708A3

公开(公告)日：2008-02-14

申请号：PCT/NO2007000118

申请日：2007-03-28

Applicant: TANDBERG TELECOM AS ,  MARTON TRYGVE FREDERIK ,  HOLMBAKKEN ESPEN ,  WINSVOLD BJOERN

Inventor： MARTON TRYGVE FREDERIK ,  HOLMBAKKEN ESPEN ,  WINSVOLD BJOERN

IPC: H04L29/06 ,  H04N7/14 ,  H04N7/15

CPC classification number: H04N7/147 ,  H04N7/15

Abstract: A method and system with means for preventing unauthorized monitoring of a local conference room (1) in which a local conferencing system (2) is located comprising generation of a deterministic sound signal (300), and loading the deterministic sound signal on a first loudspeaker (5) connected to, or integrated in the conferencing system (2), detecting the deterministic signal (600) by analyzing a microphone signal picked up by a microphone (4) connected to, or integrated in the conferencing system (2), and transferring the conference system (2) into a security mode (1100), if the deterministic signal is not detected.

Abstract translation: 一种具有防止对本地会议室（1）进行未授权监视的装置的方法和系统，其中本地会议系统（2）所在的位置包括生成确定性声音信号（300），并将确定性声音信号加载到第一扬声器 （5），连接到或集成在会议系统（2）中，通过分析由连接到或集成在会议系统（2）中的麦克风（4）拾取的麦克风信号来检测确定性信号（600），以及 如果没有检测到确定信号，则将会议系统（2）传送到安全模式（1100）。

公开(公告)号：DE602004023968D1

公开(公告)日：2009-12-17

申请号：DE602004023968

申请日：2004-12-22

Applicant: TANDBERG TELECOM AS

Inventor： MARTON TRYGVE FREDERIK ,  AARNES INGVAR FLATEN ,  WINSVOLD BJOERN ,  OVERBY GEIR OLE

IPC: H04M9/08

Abstract: An audio communication system and method with improved acoustic characteristics features a stereo detector that is introduced in the echo canceller of the system. When stereo in far-end audio is detected, converging of the adaptive mono model of the canceller is suspended, and when stereo in far-end audio is not detected, converging of the adaptive stereo model of the canceller is suspended. The system may also be extended with a miscellaneous processing unit configured to attenuate the signal at certain events implying a large stereo echo contribution. A stereo collapsing unit is also introduced on the channels of the far-end audio to remove the stereo image at certain events to further suppress the echo contribution.

公开(公告)号：EP1899963A4

公开(公告)日：2009-11-11

申请号：EP06733105

申请日：2006-04-06

Applicant: TANDBERG TELECOM AS

Inventor： WINSVOLD BJOERN

IPC: G01H20060101 ,  G10L21/0208 ,  G10L25/24 ,  H04B15/00 ,  H04N7/15

CPC classification number: H04N7/15 ,  G10L21/0208 ,  G10L25/24 ,  G10L2021/02085