| 摘要 |
<P>PROBLEM TO BE SOLVED: To analyze acoustic data and to selectively suppress wind noise while preserving signals without requiring special hardware when the wind noise exists. <P>SOLUTION: This system includes a method and an apparatus for preserving narrow-band signals in the accoustic data while selectively suppressing the wind noise, and a computer program. Sound from one or more microphones is digitized into binary data. A temporal frequency transformation is applied to the data to produce a series of spectra. The spectra are analyzed to detect the presence of wind noise and narrow-band signals. Wind noise is selectively suppressed while preserving the narrow-band signals. When the narrow-band signal is masked by the wind noise, the signal is interpolated through the times and frequencies. After that, a time series is synthesized from the signal spectral estimate which can be listened to. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
