MATLAB: How can i calculate ZCR (Zero-Crossing Rate) threshold for a given signal.

zero crossing rate threshold

Hey Everyone..

Could someone please tell me how to calcualte the ZCR threshold for a given signal. I have been searching on the internet for while, and i find some methods to calculate ZCRT. But the problem is, that i cant really understand those different methods. The reason why i need to calculate the threshold for ZCR, is to decide when there is speech(voiced) and no speech(unvoiced)

I will be thankfull for some answers..

Thanks 🙂

Best Answer

ZCR=mean(abs(diff(sign(Signal)));

Related Solutions

MATLAB: What is the difference between Sound & Soundsc? And How can i play an audio file asynchronously

Is there something from the description that you don't understand: " soundsc(y) scales the values of audio signal y to fit in the range from –1.0 to 1.0, and then sends the data to the speaker at the default sample rate of 8192 hertz. By first scaling the data, soundsc plays the audio as loudly as possible without clipping. The mean of the dynamic range of the data is set to zero."

So soundsc() scales the sound to the max dynamic range while sound() does not. A quiet sound will sound quiet with sound(), but will sound louder with soundsc(). In other words, sound plays y, while soundsc does something like this:

maxy = max(abs(y));
louder_y = y / maxy;
sound(louder_y);

MATLAB: Separate voiced and unvoiced frame of speech signal

This example:

https://www.mathworks.com/help/audio/ug/speaker-identification-using-pitch-and-mfcc.html#SpeakerIdentificationUsingPitchAndMFCCExample-2

isolates voiced speech using short-time energy and zero crossing rate.

Best Answer

Related Solutions

MATLAB: What is the difference between Sound & Soundsc? And How can i play an audio file asynchronously

MATLAB: Separate voiced and unvoiced frame of speech signal

Related Question