  Thorvald Natvig speex at natvig.com Mon Dec 12 20:52:16 PST
2005  >> one for each iteration, and wraps around at 100. >
Testing with sine waves is usually not a good idea. If you
intend on > cancelling speech, then test with speech.  Ok, I
tested more extensively with both music and two-way speech.
More on  this below.  >> However, when peeking at the values, it
seems that the weights for >> frame 0 (newest) are very low. >
Peeking at the value tells you nothing unless you do the inverse
FFT and > useful.  Actually, computing the "power spectrum" for
each frame of W shows  how large an ammount of the original
signal at time offset j the  echo canceller thinks should be
removed from the current input frame.  If you compute W*X for
each j and ifft, you'll get the  original signal with each
frequency component scaled and time-shifted  according to what W
was (for that j).  Anyway, I did some proper testing. I took my
headset, bent the microphone  arm so it's resting inside the ..
uh.. whatever you call that l