Audio Segmentation in Matlab?

hi, I have to implement an audio segmentation for audio tracks that could contain, for example, music and speech sequences.

Could anyone help me with a simple code?

thank you in advance

Answer 1

[Image Analyst]

You can use Independent Components Analysis to solve the Blind Source Separation problem (the "cocktail party problem"). Here are some links:

http://cnl.salk.edu/~tony/ica.html

http://research.ics.aalto.fi/ica/fastica/ (Has MATLAB code on it)

http://research.ics.aalto.fi/ica/icademo/

It can be done, but I doubt the math (maths, plural, for our UK friends) or the code will be "simple" as you requested. Good luck with it though.

[andrea]

thank you for your help, but i think i need something that i can use with audio features like rollOff, centroid, flux previously used for my training audio set.

[Image Analyst]

I've not heard of those. Are those methods both more effective and simpler than the ICA method I suggested?

[andrea]

I only need ad algorithm to segment an audio stream into portions. I think fastIca is for another aim

[Image Analyst]

Are you talking about just cropping your signal in time, like

subsignal = signal(200:4200);

or something like that, rather than actually extracting different types of sounds from the same segment of audio?