Method and apparatus for audio signal processing
AssigneeCedar Audio Limited
InventorDAVID ANTHONY BETTS
Life of this patent
Estimating the term…
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
Claims23
A method for audio signal processing comprising:
- displaying a spectrogram representing a recorded audio signal;
- selecting a region on the spectrogram representing a selected portion of the audio signal, the selected portion of the audio signal being constrained in time and frequency, and the selected portion of the audio signal containing an unwanted sound;
- and
- replacing the selected portion of the audio signal such that the unwanted sound is attenuated or removed.
A method for audio signal processing comprising:
- displaying a spectrogram representing a digitally-recorded audio signal;
- selecting a region on the spectrogram representing a selected portion of the digitally-recorded audio signal, the selected portion of the digitally-recorded audio signal being constrained in time and being constrained in frequency, and the selected portion of the digitally-recorded audio signal containing an unwanted sound;
- and
- attenuating or removing the unwanted sound within the selected portion of the digitally-recorded audio signal.
Dependencies are inferred from the claim text.