| 摘要 |
PROBLEM TO BE SOLVED: To specify a noise signal and an objective sound signal including the noise signal to normally operate an adaptive noise-suppressing filter, and to suppress the noise in the objective sound signal. SOLUTION: A noise and objective-sound component processor 4 estimates the signal with an incoming-call component removed from a sound signal as the noise signal, based on a voice signal obtained by picking up an incoming call through microphones 1a, 1b and receipt sound data. During a following telephone conversation after that, the noise and objective-sound component processor 4 estimates an added voice signal through a predetermined time-difference correction as the objective sound signal including the noise component, in association with the voice signal cosisting of a telephone-call voice picked up through the microphones 1a, 1b and a background noise. An adaptive filter 5 receives these estimated noise signal and the objective sound signal including the noise component as an input, and outputs the objective sound signal (transmitting voice signal) with the noise component suppressed therefrom. COPYRIGHT: (C)2009,JPO&INPIT
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