[Speex-dev] Echo Canceller on Windows Mobile

[Mohammed Sulaiman]

Hi Jean Marc,
   
  We are running the speex echo canceller code on a Windows Mobile smartphone using a TI OMAP 201MHz 850. We are making voip calls and audio is working without echo canceller code. Simply adding the following 2 functions whether the echo cancellation is wired in (ie  we use the output frame ) or not performance becomes terrible. Note 2 separate threads are used to handle audio.
   
  Playing Audio thread:
  Write to codec
  speex_echo_playback(echo_state, echo_frame);
   
  Capturing audio thread:
  Receive buffer
  speex_echo_capture(echo_state, input_frame, output_frame);
   
  We have compiled for fixed point.
  We are using codec buffer size of 256 bytes ie 128, 16bit samples.
   
    SpeexEchoState* iEchoState = speex_echo_state_init(ECHO_FRAME_SIZE, ECHO_FILTER_SIZE);
   
  ECHO_FRAME_SIZE = 128
  ECHO_FILTER_SIZE = 1024
   
  Any ideas?

   
  Do you know whether any one has this running on Windows Mobile platforms successfully.
   
  Regards

       
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