Title:
PHASE DIFFERENCE CALCULATION DEVICE, SOUND SOURCE DIRECTION DETECTION DEVICE, AND PHASE DIFFERENCE CALCULATION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/013286
Kind Code:
A1
Abstract:
The present invention more accurately calculates the phase difference between audio signals output by different microphones. An audio signal evaluation unit (5) of a sound source direction detection device (1) creates phase shift audio signals in which the relative phase shift amounts of the audio signals output by a first microphone (2a) and a second microphone (2b) are changed in steps and calculates the phase difference between the two audio signals on the basis of the integrated value of the differences between the output values of the two audio signals within a fixed range in each phase shift audio signal.
Inventors:
NAKAMURA KEISUKE
Application Number:
PCT/JP2015/064814
Publication Date:
January 28, 2016
Filing Date:
May 22, 2015
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
G01S3/808; H04R1/40; H04R3/00
Domestic Patent References:
| WO2013048708A1 | 2013-04-04 | |||
| WO2008146565A1 | 2008-12-04 | |||
| WO2008056649A1 | 2008-05-15 |
Foreign References:
| JP2004077277A | 2004-03-11 | |||
| JP2005049153A | 2005-02-24 | |||
| JPH07287062A | 1995-10-31 | |||
| JP2012226438A | 2012-11-15 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation HARAKENZO WORLD PATENT & TRADEMARK (JP)
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