Acoustic signal processing apparatus and method, and audio...

Details Acoustic signal processing apparatus and method, and audio... Acoustic signal processing apparatus and method, and audio...

2007-08-07

2007-08-07

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Spectral adjustment

C381S094200, C381S094100, C381S094700

Reexamination Certificate

active

10453918

ABSTRACT:
A first band analyzer divides an acoustic signal received from a sound playback system through an input unit into frequency bands, and generates a first band level. An acoustic signal estimator estimates the band level of the original acoustic signal at the input unit, and generates a second band level for each band. A processor extracts an external noise component which is contained in the acoustic signal using the first band level and the second band level. The external noise can be accurately estimated with less computation than in the related art.

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