Method of estimating sound arrival direction, sound arrival...

Details Method of estimating sound arrival direction, sound arrival... Method of estimating sound arrival direction, sound arrival...

2011-06-28

2011-06-28

Jackson, Jakieda R (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

Reexamination Certificate

active

07970609

ABSTRACT:
Sound signals from sound sources present in multiple directions are accepted as inputs of multiple channels, and signal of each channel is transformed into a signal on a frequency axis. A phase component of the transformed signal is calculated for each identical frequency, and phase difference between the multiple channels is calculated. An amplitude component of the transformed signal is calculated, and a noise component is estimated from the calculated amplitude component. An SN ratio for each frequency is calculated on the basis of the amplitude component and the estimated noise component, and frequencies at which the SN ratios are larger than a predetermined value are extracted. Difference between arrival distances is calculated on the basis of the phase difference at selected frequency, and the arrival direction in which it is estimated that the target sound source is present is calculated.

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Chinese Office Action mailed Mar. 16, 2010 with English translation ( 20 pages).

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