US 2011/0238418 A1 · Method and Device for Tracking Background Noise in Communication System

Abstract

A method and a device for tracking background noise in a communication system, where the method includes: calculating a SNR of a current frame according to input audio signals; increasing a frame counter, and calculating tone features and signal steadiness features of the current frame if the SNR of the current frame is not smaller than a first threshold; judging the possibility of a time window including a noise interval according to the calculated tone feature values and signal steadiness feature values of each frame of the time window when the frame counter is increased to the length of the time window; and extracting noise features in the time window. Existence of background noise is analyzed continuously in a time window, so that background noise that changes frequently and dramatically can be detected or tracked rapidly.

Claims20

Dependent claims

A method for tracking background noise in a communication system, comprising:

calculating a Signal to Noise Ratio (SNR) of a current frame according to input audio signals;
increasing a frame counter cnt2 and calculating values for tone features and signal steadiness features of the current frame if the SNR of the current frame is greater than or equal to a first threshold;
judging the possibility of a time window comprising a noise interval according to the tone feature values and the signal steadiness feature values of each frame of the time window when the frame counter cnt2 is increased to the length of the time window;
and
extracting noise features in the time window according to the judged possibility of the time window comprising a noise interval.

2 more elements

A device for tracking background noise in a communication system, comprising:

a first processing module, configured to calculate a Signal to Noise Ratio (SNR) of a current frame according to input audio signals;
a second processing module, configured to increase a frame counter cnt2, and calculate values for tone features and signal steadiness features of the current frame if the SNR of the current frame is greater than or equal to a first threshold;
a third processing module, configured to judge the possibility of a time window comprising a noise interval according to the tone feature values and the signal steadiness feature values of each frame of the time window when the frame counter cnt2 is increased to the length of the time window;
and
a fourth processing module, configured to extract noise features in the time window according to the judged possibility of the time window comprising a noise interval.

2 more elements

Dependencies are inferred from the claim text.

Method and Device for Tracking Background Noise in Communication System

Life of this patent

Method and Device for Tracking Background Noise in Communication System

Life of this patent

Abstract

Claims20