发明名称 |
Acoustic source separation |
摘要 |
A method of separating a mixture of acoustic signals from a plurality of sources comprises: providing pressure signals indicative of time-varying acoustic pressure in the mixture; defining a series of time windows; and for each time window: a) providing from the pressure signals a series of sample values of measured directional pressure gradient; b) identifying different frequency components of the pressure signals c) for each frequency component defining an associated direction; and d) from the frequency components and their associated directions generating a separated signal for one of the sources. |
申请公布号 |
US9093078(B2) |
申请公布日期 |
2015.07.28 |
申请号 |
US200812734195 |
申请日期 |
2008.10.17 |
申请人 |
The University of Surrey |
发明人 |
Hacihabiboglu Banu Gunel;Hacihabiboglu Huseyin;Kondoz Ahmet |
分类号 |
H04B15/00;G10L21/0272;H04R3/00;H04R1/10 |
主分类号 |
H04B15/00 |
代理机构 |
Wegman, Hessler & Vanderburg |
代理人 |
Wegman, Hessler & Vanderburg |
主权项 |
1. A method of separating a mixture of acoustic signals from a plurality of sources, the method comprising:
providing pressure signals indicative of time-varying acoustic pressure in the mixture; defining a series of time windows; and for each time window: a) providing from the pressure signals a series of sample values of measured directional pressure gradient; b) identifying different frequency components of the pressure signals c) for each frequency component defining an associated direction; d) combining the associated directions of the frequency components to form a probability distribution of the associated directions; e) modeling the probability distribution so as to include a set of source components each comprising a probability distribution of associated directions from a single sound source; f) obtaining from the source components a directionality function for a source direction wherein the directionality function defines a weighting factor which is applied to each frequency component and varies as a function of the difference between the source direction and the associated direction of the frequency component; and g) using the directionality function to estimate the frequency components of the acoustic signal from the at least one source direction; thereby h) generating a separated signal for at least one of the sources. |
地址 |
Guildford, Surrey GB |