发明名称 |
Nonlinear acoustic echo signal suppression system and method using volterra filter |
摘要 |
A nonlinear acoustic echo signal suppression system and method using a Volterra filter is disclosed. The nonlinear acoustic echo signal suppression system includes an acoustic echo signal estimator configured to estimate a nonlinear acoustic echo signal by using a Volterra filter in a frequency filter, and a near-end talker speech signal generator configured to generate a near-end talker speech signal, in which the nonlinear acoustic echo signal is suppressed, by using a gain function based on a statistical model. |
申请公布号 |
US9536539(B2) |
申请公布日期 |
2017.01.03 |
申请号 |
US201514788431 |
申请日期 |
2015.06.30 |
申请人 |
INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY |
发明人 |
Chang Joon Hyuk;Park Ji Hwan |
分类号 |
G10L21/0208;G10L21/0232;G10L21/0264 |
主分类号 |
G10L21/0208 |
代理机构 |
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代理人 |
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主权项 |
1. A nonlinear acoustic echo signal suppression system comprising:
an acoustic echo signal estimator configured to estimate a nonlinear acoustic echo signal by using a Volterra filter in a frequency domain; and a near-end talker speech signal generator configured to generate a near-end speech absence probability (NSAP) by applying Bayes's rule to a speech absence probability distribution function (PDF), a speech presence PDF, and a prior near-end speech presence probability ratio, and to generate a near-end talker speech signal by suppressing the nonlinear acoustic echo signal based on the NSAP and a gain function, wherein the acoustic echo signal estimator is configured to estimate a filter factor of the Volterra filter by using a multi-tap least square estimator, and estimate the nonlinear acoustic echo signal by using the filter factor of the Volterra filter. |
地址 |
Seoul KR |