CPU - i.MX535
Audio Codec Chip – SGTL5000
Linux – 22.214.171.124
I am using VOIP stack on the i.MX53 which works well for the video calls. The issue is with the audio. During a call, there an echo which makes the sound output inaudible. I tweaked the VOIP stack and reduced a little bit of it. Now we further need to tweak into the kernel to reduce the audio latency during capture and playback which will reduce the echo.
I am pretty sure that the VOIP stack is not doing this. On the VOIP side, I am using PCMU and PCMA audio codecs.
Can noise/echo cancellation be achieved either through some kernel configs or settings in audio codec. Is there a built-in echo-cancellation in the SGTL codec chip?
Appreciate any help/pointers in suppressing echo.