Title:
音源位置検知装置
Document Type and Number:
Japanese Patent JP4177452
Kind Code:
B2
Abstract:
Provided is a sound source localization device which can detect a source location of an extraction sound, including at least two microphones; an analysis unit (103) which (i) analyze frequencies of the mixed sound including the noise and received by each microphone, and (ii) generates frequency signals; and an extraction unit (105) which, for each source location candidate, (a) adjusts time axes of the frequency signals corresponding to the microphones, so that there is no time difference between when the mixed sound reaches one microphone from the source location candidate and when the mixed sound reaches another microphone from the source location candidate, and (b) determines frequency signals having a difference distance equal to or smaller than a threshold value, from among the frequency signals corresponding to the microphones with the time axis having been adjusted, the difference distance representing a degree of a difference in the frequency signals between the microphones, and (c) extracts the source location of the extraction sound from among the source location candidates, in accordance with a degree of matching of the determined frequency signals between the microphones.
Inventors:
Shinichi Yoshizawa
Yoshihisa Nakato
Yoshihisa Nakato
Application Number:
JP2008504286A
Publication Date:
November 05, 2008
Filing Date:
November 06, 2007
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G01S3/808; G10L21/0272; G10L21/028; G10L21/0308; H04R3/00
Domestic Patent References:
| JP2000099853A | ||||
| JP2000105274A | ||||
| JP2000098015A | ||||
| JP2004537057A | ||||
| JP5092767U | ||||
| JP7192183A |
Attorney, Agent or Firm:
Hiromori Arai