[pulseaudio-discuss] Test and Evaluate Echo Cancellation in an Embedded Device

[Caio]

Arun,

I will test and send the feedback.

Thank you

Regards,

Caio Pereira

2016-05-12 0:47 GMT-03:00 Arun Raghavan <arun at arunraghavan.net>:

> On Thu, 12 May 2016, at 01:41 AM, Caio wrote:
> > Hello!
> >
> > I'm working with a embedded linux and I'm using gstreamer to talk with
> > other board (voice call).
> >
> > To test and evaluate my project I'm using the IMX6SABRE Dual Lite Board
> >  (
> >
> http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/i.mx-applications-processors/i.mx-6-processors/i.mx6qp/sabre-board-for-smart-devices-reference-design-based-on-the-i.mx-6-series:RDIMX6SABREBRD
> > )
> >
> >  have the pulseaudio , speex and webrtc installed in my oard,  but with
> >  my
> > tests I didn't have success with echo cancellation
> >
> > In my testbed I'm using two boards in different rooms, each board has the
> > same softwares, to test the voice call I'm using a script with gstreamer.
> >
> > There's some method to test and evaluate the echo cancellation in
> > embedded
> > environment? Someone has an advice?
> >
> > I'm loading the module-echo-cancel using this command
> >
> > pactl load-module module-echo-cancel source_name=echosource
> > sink_name=echosink aec_method=webrtc sink_master=mastersink
> > source_master=mastersource
> >
> > (I change the webrtc to speex in other tests)
> >
> > The Gstreamer Script (usage ./gstreamer-call.sh ip start)
> >
> >     #!/bin/sh
> >     IPDEST=$1
> >
> >     case "$2" in
> >        start)
> >              echo "Starting gstlaunch"
> >                     gst-launch-1.0 -v \
> >                             pulsesrc device="echosource"  \
> >                     ! alawenc ! rtppcmapay ! udpsink port=4000
> >                     host=$IPDEST
> > &
> >                     gst-launch-1.0 -v udpsrc
> >
> caps="application/x-rtp,media=(string)audio,clock-rate=(int)8000,encoding-name=(string)PCMA"
> > port=4000 ! \
> >                             rtppcmadepay ! alawdec ! audioconvert !
> > audioresample ! \
> >                             pulsesink device="echosink" \
> >                     &
>
> This script should work. Can you describe what is failing? And can you
> attach PA server logs as well?
>
> I usually test with something like:
>
>   PULSE_PROP="filter.want=echo-cancel" \
>   gst-launch-1.0 filesrc location=some-voice-file.wav ! wavparse !
>   pulsesink \
>                        pulsesrc ! wavenc ! filesink
>                        location=cancelled.wav
>
> -- Arun
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> pulseaudio-discuss at lists.freedesktop.org
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>



-- 
----------------------------------------------
Caio Pereira
@caio_rtp
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