公开(公告)号：US20050131689A1

公开(公告)日：2005-06-16

申请号：US11007245

申请日：2004-12-09

申请人： Philip Garner ,  Toshiaki Fukada ,  Yasuhiro Komori

发明人： Philip Garner ,  Toshiaki Fukada ,  Yasuhiro Komori

IPC分类号： G10L11/02 ,  G10L15/04 ,  G10L15/20 ,  G10L21/02 ,  G10L15/12

CPC分类号： G10L25/78

摘要： Robust signal detection against various types of background noise is implemented. According to a signal detection apparatus and method of this invention, the feature amount of an input signal sequence and the feature amount of a noise component contained in the signal sequence are extracted. After that, the first likelihood indicating probability that the signal sequence is detected and the second likelihood indicating probability that the noise component is detected are calculated on the basis of a predetermined signal-to-noise ratio and the extracted feature amount of the signal sequence. Additionally, a likelihood ratio indicating the ratio between the first likelihood and the second likelihood is calculated. Detection of the signal sequence is determined on the basis of the likelihood ratio.

摘要翻译： 实现对各种背景噪声的鲁棒信号检测。 根据本发明的信号检测装置和方法，提取输入信号序列的特征量和包含在信号序列中的噪声成分的特征量。 之后，基于预定的信噪比和所提取的信号序列的特征量来计算检测到信号序列的概率的第一似然度和指示检测到噪声分量的概率的第二似然。 另外，计算表示第一似然率与第二似然率之比的似然比。 基于似然比确定信号序列的检测。