topic Re: Echo cancelation, help help!!! in Intel® Integrated Performance Primitives

Echo cancelation, help help!!!

soimattrang — Wed, 19 Aug 2009 05:03:29 GMT

Hi everybody

The CancelEcho function need two buffers sin and rin. sin is signal from micro and rin is reference signal. rin must remember the waveform sent out for a period of time by set a delay variable. can everyone demo serveral code lines to perform action above? thanks!

Re: Echo cancelation, help help!!!

Ying_H_Intel — Mon, 24 Aug 2009 04:32:11 GMT

Quoting - soimattrang

Hello soimattrang,

Are you looking for Echo cancel sample code? IPP sampleprovide one at IPP speech Codec sample ( speech-codecsapplicationusc_ec, it demostrates how to use these EC functions).

You may take a loot at it, the package (including MSVC 2005 project) can be download from
<http://software.intel.com/en-us/articles/intel-integrated-performance-primitives-intel-ipp-intel-ipp-sample-code/>
=> Intel IPP sample page.

Best Regards,
Ying

Re: Echo cancelation, help help!!!

Vyacheslav_Baranniko — Mon, 24 Aug 2009 13:51:40 GMT

Quoting - soimattrang

Hi
In general USC EC CancelEcho() function eats two audio inputs at ones:10msofmic signal (s-in) and 10ms offar endsignal (r-in).Ones near endclientstarts playing out r-in signalitshould feed it also to CancelEchofunction withusingcurrent frame from the mic as s-in,thus synch r-in and s-in streams. Then it should repeate this processframe-by-frame in order: playing out and feeding to ECnext r-in frame with next mic frame.
Vyacheslav, IPP speech domain