发明名称 |
ECHO PROCESSING APPARATUS |
摘要 |
An echo canceller has a high-pass filter 11, a speaker 3, an A/D converter 6, and an echo canceller 7. The high-pass filter 11 suppresses a low-frequency component in a received signal. The speaker 3 outputs an acoustic sound of a low-frequency suppressed received signal passed through the high-pass filter 11. TheA/D converter 6 converts an acousticecho fromamicrophone 4 into a transmission signal of a digital form. The echo canceller 7 generates a pseudo echo signal based on the low-frequency suppressed received signal passed through the high-pass filter 11, and eliminates the acoustic echo to be inputted to the microphone 4 from the speaker 3 by subtracting the pseudo echo signal from the digital signal converted by the A/D converter 6. <IMAGE> |
申请公布号 |
EP1300963(A4) |
申请公布日期 |
2009.03.04 |
申请号 |
EP20020771733 |
申请日期 |
2002.05.20 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TAKAHASHI, SHINYA;MATSUOKA, BUNKEI;KAJIYAMA, IKUO |
分类号 |
G10L21/02;H04M1/60;H04M1/725;H04M9/08;H04M19/08;H04R3/02;(IPC1-7):H04B3/23 |
主分类号 |
G10L21/02 |
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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