发明授权
US07809129B2 Acoustic echo cancellation based on noise environment 有权
基于噪声环境的声学回声消除

  • 专利标题: Acoustic echo cancellation based on noise environment
  • 专利标题(中): 基于噪声环境的声学回声消除
  • 申请号: US11848376
    申请日: 2007-08-31
  • 公开(公告)号: US07809129B2
    公开(公告)日: 2010-10-05
  • 发明人: Jincheng WuJoel Clark
  • 申请人: Jincheng WuJoel Clark
  • 申请人地址: US IL Schaumburg
  • 专利权人: Motorola, Inc.
  • 当前专利权人: Motorola, Inc.
  • 当前专利权人地址: US IL Schaumburg
  • 主分类号: H04M9/08
  • IPC分类号: H04M9/08
Acoustic echo cancellation based on noise environment
摘要:
A method (200) of cancelling echo in a duplex communication device (100). The method can include detecting a level of noise present on an uplink signal path (104), generating a noise classifier (194) based on the detected level of noise, detecting whether uplink audio is present on the uplink signal path (104) and detecting whether downlink audio is present on a downlink signal path (102). The method further can include generating a double talk flag (136) based at least on the noise classifier, whether uplink audio is present on the uplink signal path, and whether downlink audio is present on the downlink signal path. In addition, the double talk flag, the noise classifier and an uplink signal can be processed to generate an output signal (120) having reduced echo.
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