Noise suppression using integrated frequency-domain signals

摘要

To provide a noise suppressing method and apparatus capable of achieving high-quality noise suppression using a lower amount of operations. Noise contained in an input signal is suppressed by transforming the input signal into frequency-domain signals; integrating bands of the frequency-domain signals to determine integrated frequency-domain signals; determining estimated noise based on the integrated frequency-domain signals; determining spectral gains based on the estimated noise and said integrated frequency-domain signals; and weighting said frequency-domain signals by the spectral gains.

主权项

1. A noise suppressing method for suppressing noise contained in an input signal including a speech or audio signal, comprising the steps of:
transforming the input signal into frequency-domain signals with a first frequency resolution; integrating the frequency-domain signals to determine subband signals with a second frequency resolution that is smaller than the first frequency resolution, wherein each subband signal comprises a plurality of frequency-domain signals; determining estimated noise with the second frequency resolution based on the subband signals; determining a single spectral gain for each subband signal based on the estimated noise; and weighting said frequency-domain signals by said spectral gains wherein the single spectral gain is commonly used for all the plurality of frequency-domain signals of the same subband signal.