search for: nearend

...ng tested in two different acoustic echo cancellers, it seems that the speex aec isn't doing a lot. As I read in the mailing list, some people are being successful using it, so I have some questions: 1) What does the ref and echo mean in your function call? "Echo" for me would be the nearend (microfone + echo) and "Ref" should be the farend (nearend speaker). But if I use them like that, nothing happens! 2) What's the filter length I should be using anyway? 3) I guess the output parameter is the mic ("echo" signal) without the "ref" (farend speaker)...

When updating the speex sources from svn tree, I found that the following revision has corrupted the deallocation (segmentation fault): ------------------------------------------------------------------------ r9320 | jm | 2005-05-27 15:05:05 -0300 (Fri, 27 May 2005) | 2 lines Proper de-allocation When compiling with the 9316, everything works fine. but when I update with later

...ndroid HAL, but now I am seeing intermittent failures where no echo is cancelled. The AEC works about 75% of the time and seems robust. On an AEC failure I can hang up and call again which will initialize a new echo state and it usually works after that. I have also written a test app that takes a nearend and farend wav and various parameters like frame_size, filter_size and echo delay and this works flawlessly with the delay that I measured with our system. Is there anything I can do to resolve the other 25% of the time. I have tried lowering the mic input volumes. I see that there is an API to re...