Electrical audio signal processing systems and devices – Noise or distortion suppression – Interpolation
Reexamination Certificate
2011-07-12
2011-07-12
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Noise or distortion suppression
Interpolation
C700S094000
Reexamination Certificate
active
07978862
ABSTRACT:
A sampled digital audio signal is displayed on a spectrogram, in terms of frequency vs. time. An unwanted noise in the signal is visible in the spectrogram and the portion of the signal containing the unwanted noise can be selected using time and frequency constraints. An estimate for the signal within the selected portion is then interpolated on the basis of desired portions of the signal outside the time constraints defining the selected portion. The interpolated estimate can then be used to attenuate or remove the unwanted sound.
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Cedar Audio Limited
Chin Vivian
Lao Lun-See
Saliwanchik Lloyd & Eisenschenk
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