Title:
音響ポインティングデバイス、音源位置のポインティング方法及びコンピュータシステム
Document Type and Number:
Japanese Patent JP4926091
Kind Code:
B2
Abstract:
There is disclosed an acoustic pointing device that is capable of performing pointing manipulation without putting any auxiliary equipment on a desk. The acoustic pointing includes a microphone array that retains plural microphone elements; an A/D converter that converts analog sound pressure data into digital sound pressure data; a buffering that stores the digital sound pressure data; a direction of arrival estimation unit that executes estimation of a sound source direction of a transient sound based on a correlation of the sound between the microphone elements obtained by the digital sound pressure data; a noise estimation unit that estimates a noise level in the digital sound pressure data; an SNR estimation unit that estimates a rate of a signal component based on the noise level and the digital sound pressure data; a power calculation unit that computes and outputs an output signal from the rate of a signal component; an integration unit that integrates the sound source direction and the output signal to specify a sound source position; and a control unit that converts, based on data in a DB of screen conversion, the specified sound source position into one point on a screen of a display device.
Inventors:
Togami Masato
Takashi Sumiyoshi
Yasunari Ohbuchi
Takashi Sumiyoshi
Yasunari Ohbuchi
Application Number:
JP2008037534A
Publication Date:
May 09, 2012
Filing Date:
February 19, 2008
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G06F3/043; A63B63/00; A63B71/06; G01S5/20; G06F3/041; G10L21/0232; H04R1/40; H04R3/00
Domestic Patent References:
| JP200685636A | ||||
| JP2006323823A |
Foreign References:
| WO2007035314A2 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation