[Speex-dev] AEC in speex

[Anup KC]

Hi

I was trying out the AEC in speex.

It would be helpful if some of you can answer these querries

1.After the error values are computated in teh daptation process a check -if
filter is completely mis-adapted - is performed. How could you explain the
criteria used for this check.
2.what exactly is meant by  over-cancellation and under-cancellation ?
3.Also it was seen that without the speex_preprocess call the output quality
is very much differnt. Is this expected ? if yes will this not increase the
complexity of operation considerably ?

Is there any document which answers these querries ?

Regards
Anup