<div>I actually forgot to mention that I'm using ultra-wideband mode, but seems like you understood that anyway. Is this true that Speex echo cancellation only performs well in narrowband mode !? </div><div></div><div>
I've been using 100 ms as the default tail length. I don't know what the ideal tail length would be. I have tried shorter and longer tails but it hasn't made any difference.</div><div></div><div>Does DirectSound's AEC perform well with high quality recording? Is it the general opinion that it performs significantly better than Speex AEC?</div>
<div></div><div>cheers</div><div>Greger</div><div class="gmail_quote"></div><div class="gmail_quote"></div><div class="gmail_quote">2009/8/10 Tim Na <span dir="ltr"><<a href="mailto:hna@alu.edu">hna@alu.edu</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="굴림">If you search the mail archive, you will see that people were
only successful using narrowband with long tail length.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="굴림">Unless you have speaker input in perfect sync with mic
input, it is difficult to use Speex AEC.</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="굴림">If you don't have restriction on using Vista's AEC DMO or
XP"s DirectSound, I would recommend using those.</font></span></div>
<div dir="ltr" align="left"> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" size="2" face="굴림">Tim</font></span></div><br>
<div dir="ltr" lang="en-us" align="left">
<hr>
<font size="2" face="Tahoma"><b>From:</b> <a href="mailto:speex-dev-bounces@xiph.org" target="_blank">speex-dev-bounces@xiph.org</a>
[mailto:<a href="mailto:speex-dev-bounces@xiph.org" target="_blank">speex-dev-bounces@xiph.org</a>] <b>On Behalf Of </b>Greger
Burman<br><b>Sent:</b> Monday, August 10, 2009 5:40 AM<br><b>To:</b>
<a href="mailto:speex-dev@xiph.org" target="_blank">speex-dev@xiph.org</a><br><b>Subject:</b> [Speex-dev] AEC
troubleshooting<br></font><br></div><div><div class="h5">
<div>I'm experiencing little to no damping of acoustic echo from the echo
cancellor and I can't figure out why so far. I thought I should try the
echo_diagnostic tool so I built libspeex.dll and libspeexdsp.dll with the
DUMP_ECHO_CANCEL_DATA flag, but I'm not getting any output files at runtime. Any
ideas?<br clear="all"></div>
<div>Build information:</div>
<div>Speex version: 1.2rc1</div>
<div>Target Win32 x86</div>
<div>MS VC++2008 EE</div>
<div>Configuration: Release, Full optimization, _USE_SSE</div>
<div>DUMP_ECHO_CANCEL_DATA </div>
<br>-- <br>Greger Burman<br><br></div></div></div>
</blockquote></div><br>