发明名称 |
DYNAMIC OPTIMIZATION OF HANDSFREE MICROPHONE GAIN |
摘要 |
A system and method for dynamically optimizing the analog gain for a microphone in a telephone terminal operable in handsfree mode. The system makes use of a process whereby a relatively inexpensive analog to digital converter is used to meet gain requirements so as to accommodate the loudest echo through transmit path while maintaining an acceptable signal to noise ratio for the quietest talker. The system digital signal processor in conjunction with speech activity detection means is used to provide an optimum microphone gain under all circumstances. |
申请公布号 |
WO9807263(A2) |
申请公布日期 |
1998.02.19 |
申请号 |
WO1997CA00579 |
申请日期 |
1997.08.08 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
MCCLENNON, SCOTT;DING, HEPING;DAL FARRA, DAVID |
分类号 |
H04M9/08 |
主分类号 |
H04M9/08 |
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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