Method and apparatus for generating comfort noise using a parametric model noise statistics

摘要

In the method and apparatus (57) characterized by an information signal or noise Abstract], used to reconstruct the signal then its features, the higher-order statistics of the at least one parametric model of the signal is related to the parameters of the model be compensated. For example, in a DTX communications, transmitter background noise, a continuous frame of estimated mean spectral magnitude, is characterized by successive frames estimated standard deviation to the estimated mean spectral amplitudes are attached to each. Reconstruction, estimated standard deviation is used to improve sound quality of the reconstructed noise due to the randomization and randomization of the spectrum amplitude. The quality of the noise that is reconstructed further improved by performing averaging in reception, filtering or other smoothing before transmission and / or the average spectral amplitude.