Acoustic echo cancellation

Hi all,

I am now doing single-channel acoustic echo cancellation project in Matlab. I have tried NLMS and frequency-domain algorithm. However, the performance is not satisfying. During the converging process, the echo is clearly audible. How to eliminate residual echoes during the converging process? Is a post-filter necessary? Also, the double-talk detector does not work very well. I am now considering to change to sub-band algorithm? Can anybody tell me whether sub-band algorithm will provide better performance? Otherwise I wouldn't put time on it.

Anyone who can offer me some efficient Matlab code? Very appreciated!!! I'm driven mad...

Thanks a lot!

Hi
I can't help you with this issue.But I've started to work on echo cancellation with Matlab. Can I see your codes for NLMS and frequency-domain algorithm?
Thanks..