echo cancellation
Hi:
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) { stream->ec=ms_filter_new(MS_NEW_SPEEX_EC_ID); ms_filter_call_method(stream->ec,MS_FILTER_NEW_SET_SAMPLE_RATE,&pt->clock_rate); //inec_tail_len = 100; //ec_delay = ; if (ec_tail_len!=0) ms_filter_call_method(stream->ec,MS_ECHO_CANCELLER_SET_TAIL_LENGTH,&ec_tail_len ); if (ec_delay!=0) ms_filter_call_method(stream->ec,MS_ECHO_CANCELLER_SET_DELAY,&ec_delay); if (ec_framesize!=0) ms_filter_call_method(stream->ec,MS_ECHO_CANCELLER_SET_FRAMESIZE,&ec_framesize) ; } Expecting anybody can give me some advices to cancel the hateful echo. Best regards! |
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