Title:
収音方法、装置、プログラム、および記録媒体
Document Type and Number:
Japanese Patent JP4298466
Kind Code:
B2
Abstract:
To realize sound collection with localization feeling of a sound image even when there is a speaker at a location where an opening angle viewed from a microphone is small.
A covariance matrix computing part 104 calculates a covariance matrix from a sound reception signal, and stores it in a covariance matrix storing part 106 for each location of a speaker detected by a speaker location detecting part 105. Then, L(R) channel filter coefficient calculating parts 107Land 107Rcalculate L(R) channel filter coefficients from the stored covariance matrix and L(R) channel mixing coefficients under such conditions that their received speaker voice components are mixed by the L(R) channel mixing coefficients corresponding to the respective speaker locations, and set those L(R) channel filter coefficients to L(R) channel filters 102L1to 102LMand 102R1to 102RM. The outputs of the L channel filters 102L1to 102LMare added by an L channel adder 103L, and the outputs of the R channel filters 102R1to 102RMare added by an R channel adder 103Rto obtain an L channel output signal and an R channel output signal.
COPYRIGHT: (C)2005,JPO&NCIPI
Inventors:
Kazunori Kobayashi
Yoichi Haneda
Sumiu Sakauchi
Suehiro Shimauchi
Kenichi Furuya
Akatsuki Emura
Akitoshi Kataoka
Application Number:
JP2003370697A
Publication Date:
July 22, 2009
Filing Date:
October 30, 2003
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04R5/027; G10L21/0272; H04R3/00
Domestic Patent References:
| JP7250397A | | | | |
| JP10042396A | | | | |
| JP10257598A | | | | |
| JP11018194A | | | | |
| JP11304906A | | | | |
| JP2004078021A | | | | |
| JP2005064968A | | | | |
Attorney, Agent or Firm:
Akio Miyazaki
