Method and arrangement for processing of audio signals

摘要

Method and arrangement in an audio handling entity, for damping of dominant frequencies in a time segment of an audio signal. A time segment of an audio signal is obtained, and an estimate of the spectral density or “spectrum” of the time segment is derived. An approximation of the estimate is derived by smoothing the estimate, and a frequency mask is derived by inverting the approximation. An emphasized damping is assigned to the frequency mask in a predefined frequency range, as compared to the damping outside the predefined frequency range. Frequencies comprised in the audio time segment are then damped based on the frequency mask. The method and arrangement involves no multi-band filtering or selection of attack and release times.

主权项

1. A method in an audio handling entity for damping of dominant frequencies in a time segment of an audio signal, the method comprising:
obtaining a time segment of an audio signal; deriving an estimate of the spectral density of the time segment; deriving an approximation of the estimated spectral density by smoothing the estimate; deriving a frequency mask by inverting the approximation of the estimated spectral density, the output of the inverting producing a frequency domain signal as the frequency mask; assigning an emphasized damping to the frequency mask in a predefined frequency range in the audio frequency spectrum, as compared to the damping outside the predefined frequency range; and damping frequencies comprised in the audio time segment based on the frequency mask.