To accurately collect speech of only a specified speaker such as a sales person in counter selling or the like.
A speech collection system 10 extracts and collects target speech which is a target in a plurality of pieces of speech in which coming directions are different from each other. The system includes a microphone array 11 including at least first and second microphones 11a and 11b, in which the first and second microphones are arranged by separating them with a predetermined distance. Discrete Fourier transform is performed on each signal of speech received by the first and second microphones, and a plurality of cross spectrum power (CSP) coefficients related to the coming direction of speech are calculated, and a plurality of speech signals are detected from the plurality of CSP coefficients. Then, a speech direction index defined according to an angle between a line for connecting the first and second microphones and the coming direction, is detected from the plurality of calculated CSP coefficients, and the signal of the target speech is extracted from the plurality of speech signals, which are detected from the detected speech direction index.
COPYRIGHT: (C)2010,JPO&INPIT
Osamu Ichikawa
Masashi Nishimura
| JP5156260B2 | ||||
| JP2004289762A | ||||
| JP2002135642A | ||||
| JP2007257088A | ||||
| JP2007233239A | ||||
| JP2002062348A |
| WO2007018293A1 |
Tasaichi Tanae
Yoshihiro City
Hiroshi Sakaguchi