[Speex-dev] echo cancellation

dong ma madong19860727 at gmail.com
Fri Sep 3 18:16:55 PDT 2010

 I am developing an IP Phone on ARM(samsung 6410; CPU:667MHZ), and use lib
mediastreamer.2.6.0 for audio
 communication, but now the echo occur while talking. In the lib
mediastreamer.2.6.0, I find a filter can
 do echo Cancellation by calling lib speex. I active it to filter the
collected voice, but the telephone
 receiver can't hear any voice. Maybe I setup parameters wrong, the
parameters are as follow:

        int ec_tail_len = 100;
 int ec_delay = 20;
 int ec_framesize = 0;
 if (use_ec) {
  //inec_tail_len = 100;
  //ec_delay = ;
  if (ec_tail_len!=0)
  if (ec_delay!=0)
  if (ec_framesize!=0)

    Expecting anybody can give me some advices to cancel the hateful echo.
    Best regards!
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