发明名称 |
ECHO CANCELLATION APPARATUS, CONFERENCING SYSTEM USING THE SAME, AND ECHO CANCELLATION METHOD |
摘要 |
An echo cancellation apparatus is connectable to a speaker configured to output speaker signals and a microphone configured to receive a sound from the speaker and including a plurality of microphone elements. The echo cancellation apparatus includes: a generating unit configured to generate a plurality of sensitivity signals having different sensitivity patterns which represent directionality of the microphone, based on a plurality of microphone signals obtained from the respective microphone signals; a delay estimating unit configured to determine a shortest delay time as an estimated delay time, the shortest delay time being a shortest one of delay times between the speaker signals and the microphone signals, the delay times being obtained from the respective sensitivity signals; and an echo suppressing unit configured to suppress echoes of the plurality of microphone signals using the estimated delay time.
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申请公布号 |
US2013016820(A1) |
申请公布日期 |
2013.01.17 |
申请号 |
US201213544514 |
申请日期 |
2012.07.09 |
申请人 |
PANASONIC CORPORATION;TAKAYAMA SHINICHI;NISHIKAWA TSUYOKI |
发明人 |
TAKAYAMA SHINICHI;NISHIKAWA TSUYOKI |
分类号 |
H04M3/42;H04M9/08 |
主分类号 |
H04M3/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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