发明名称 |
DEVICE DESIGNED TO ELIMINATE THE ECHO FROM DIGITAL MOBILE PHONE |
摘要 |
A single two-ended echo canceller is provided that uses an adaptive FIR filter to model the impulse response of the echo path and cancel the echo originating from the PSTN side of the connection, and a non-linear processor controlled by input signal levels to cancel the echo originating from the mobile phone side of the connection. Since the linear processing function is not used for cancelling echoes of the mobile phone side, the algorithms directed to estimating and cancelling echoes on the two sides of the connection can be executed in a single DSP, with all of the attendant advantages. |
申请公布号 |
PL187658(B1) |
申请公布日期 |
2004.08.31 |
申请号 |
PL19980361692 |
申请日期 |
1998.03.24 |
申请人 |
TELEFONAB LM ERICSSON PUBL |
发明人 |
ERIKSSON GUNNAR;SVENSSON TOMMY;TRUMP TONU |
分类号 |
H04B7/015;H04B3/23;H04M9/08;H04Q11/04 |
主分类号 |
H04B7/015 |
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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