Patent ID: 8437386
Filing Date: 2013-05-07
Classification: H03H

Abstract:
1. A method comprising: inputting a speech signal into a filter having filter characteristics effective to cause the filter to filter a first portion of the input speech signal to generate a filtered portion of an output signal; analyzing the filtered portion of the output signal by determining both an energy of a frame of the input speech signal and an energy of a frame of the filtered portion of the output signal; detecting if ringing is present in the filtered portion of the output signal based on said analysis; and adjusting the filter characteristics to reduce ringing in a subsequent filtered portion of the output signal if it is determined that ringing is present in the filtered portion by outputting a control signal to the filter effective to cause the filter to filter a subsequent portion of the speech signal to generate the subsequent filtered portion, the control signal configured to dampen an impulse response of the filter.