Method and arrangement for processing of audio signals

Patent metadata

Field	Value
Publication number	US-9065409-B2
Application number	US-201113071711-A
Country	US
Kind code	B2
Filing date	Mar 25, 2011
Priority date	Mar 21, 2011
Publication date	Jun 23, 2015
Grant date	Jun 23, 2015

Abstract

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. 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.

First claim

The invention claimed is:

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 invertin…

Assignees

• Sandgren Niclas
• Ericsson Telefon Ab L M

Inventors

• Sandgren Niclas

Classifications

• G10L21/0208

  Physics · mapped topic

• H03G9/005 Primary

  Electricity · mapped topic

• G10L25/24

  Physics · mapped topic

• H03G9/025

  Electricity · mapped topic