how to find snr ratio of audio signals in simulink? plz help me by replying as soon as possible

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noor khan on 17 May 2013

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i have 2 signal inputs one audio input and other noise, i filtered the noise using adaptive filter. now i need to find snr of the original signal and recoverd signal. plz help me asap

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Answer 1

David Barry on 17 May 2013

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I suggest you first start by referring back to the definition of SNR - i.e. the power ratio between a signal and the background noise.

SNR = P1/P2 where P1/P2 is power ratio of signal and noise.

SNR = (A1/A2)^2 where A1 and A2 are RMS amplitude of signal and noise.

This may then point you towards the Simulink blocks you might need, i.e. RMS, division, math function (squared). You probably also want to look at the dB conversion blocks.