发明名称 |
Verfahren und System zum Erkennen, Indizieren und Suchen von akustischen Signalen |
摘要 |
A computerized method extracts features from an acoustic signal generated from one or more sources. The acoustic signal are first windowed and filtered to produce a spectral envelope for each source. The dimensionality of the spectral envelope is then reduced to produce a set of features for the acoustic signal. The features in the set are clustered to produce a group of features for each of the sources. The features in each group include spectral features and corresponding temporal features characterizing each source. Each group of features is a quantitative descriptor that is also associated with a qualitative descriptor. Hidden Markov models are trained with sets of known features and stored in a database. The database can then be indexed by sets of unknown features to select or recognize like acoustic signals. <IMAGE> |
申请公布号 |
DE60203436(D1) |
申请公布日期 |
2005.05.04 |
申请号 |
DE2002603436 |
申请日期 |
2002.05.14 |
申请人 |
MITSUBISHI DENKI K.K., TOKIO/TOKYO |
发明人 |
CASEY, MICHAEL A. |
分类号 |
G10L15/10;G10L11/00;G10L15/02;G10L15/06;G10L15/14;G10L19/00;G10L21/02;(IPC1-7):G10L15/02;G10L17/00 |
主分类号 |
G10L15/10 |
代理机构 |
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地址 |
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