Speex dev - Dec 2005 - AEC params

Hi:

I have been trying to use speex for AEC.

I have recorded two voice samples separately using
audacity using the same soundcard. I reduced the gain
of one of the samples and mix this signal with the
other voice sample (saved as a raw sample, with frame
size 64 and sampling rate of 8 KHz. I use the mixed
one as a ref signal and the other unaltered signal as
the echo.

Am trying to run the testecho (with preprocessing
blocked), but no success in removing echo from the
reference.

I also tried adding small delays (5 ms 10ms), in the
reference signal, but still no success.

I tried filter lengths from 100 to 300ms but the same.

Can anyone help me sort the issue of why am not
getting any success with the echo cancellation.
Thanks.

Su

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> Am trying to run the testecho (with preprocessing
> blocked), but no success in removing echo from the
> reference.
Define "no success". Result is worse? the same? not *enough*
attenuation
of the echo?
> Can anyone help me sort the issue of why am not
> getting any success with the echo cancellation.
> Thanks.
Check that your signal doesn't have a DC offset in it.

	Jean-Marc