Friday, May 19, 2017

How to detect continuous noise in audio call?


We want to detect bad audio quality in audio call.


Should we extract this information from amplitude or frequency spectrum ? Is there any technique/transform/filter available for this ?


Example:


I am attaching two signal graph(Clean Signal vs Noisy One) of Amplitude vs time.



Clean Signal Graph:


enter image description here


Noisy Signal Graph:


enter image description here


As shown in above graph, there is a continuous noise in background in Noisy signal.


How can it be differentiated between this two signal ?




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