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2006 Nov 02
2
echo cancellation on PDA
2006/11/2, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>: > > Today I tried speex echo cancellation on my VoIP application running > > on a windows mobile based PDA (OMAP1510 168MHz). The result is > > disappointing: it takes 150-250 ms to do echo cancellation (by calling > > speex_echo_capture() ) for a 20 ms frame! > > Are you by any chance using an insane
2006 Nov 02
1
echo cancellation on PDA
...in time on the new PDA, it did no help to cancel the echo, here is my test scenario: Init echo_state: echo_state=speex_echo_state_init(160,1120); int tmp=8000; speex_echo_ctl(echo_state,SPEEX_ECHO_SET_SAMPLING_RATE,&tmp); In playing thread: receive incoming RTP packet; decode(encoded_buf,decoded_buf); speex_echo_playback(echo_state,decoded_buf); add_in_play_queue(decoded_buf) In Recording thread wait for recorded data coming (every 20ms); short* mic = reinterpret_cast<short*>(recorded_buf); speex_echo_capture(echo_state,mic,mic,NULL); decode(recorded_buf...