Re: [Linphone-users] Why isn't the echo cancellation working?

[Simon Brenner]

Hi,

hm... How do you know there is a high audio latency? Is it the "d=..."?
Strange, because I didn't perceive an unusually high latency. Is the EC working 
alright for everyone?

I'm also not sure with which values to best initiate the EC, how about those 
three?

-Simon.



Dragos D wrote:
> Hi,
> 
> I suspect the AEC does not work because of the the high audio latency.
> Apparently you are using ALSA. In a normal conversation is there a big
> latency?
> 
> Regards,
> Dragos
> 
> 
> On Fri, Aug 20, 2010 at 3:08 AM, Simon Brenner
> <address@hidden <mailto:address@hidden>> wrote:
> 
>     Yes. I'm using an ARM based device with a Wolfson audio codec.
> 
>     -Simon.
> 
> 
>     Dragos D wrote:
>     > Are you using one soundcard for microphone and speakers?
>     > Dragos
>     >
>     > On Thu, Aug 19, 2010 at 10:43 AM, Simon Brenner
>     > <address@hidden <mailto:address@hidden>
>     <mailto:address@hidden
>     <mailto:address@hidden>>> wrote:
>     >
>     >     Hi,
>     >
>     >     can anyone tell me why the echo cancellation of my Linphone isn't
>     >     working?
>     >     I'm using a git Linphone on Linux. I'm setting my ec with
>     >
>     >     ec on 256 256 256
>     >
>     >     It seems like I'm getting 100% echo...
>     >     Any suggestions?
>     >
>     >     Thanks,
>     >     -Simon.
>     >
>     >     P.S.:
>     >
>     >     ortp-message-Initializing speex echo canceler with framesize=256,
>     >     filterlength=2048, delay_samples=2048
>     >     ortp-message-Filter MSRtpRecv is already being scheduled;
>     nothing to do.
>     >     ortp-warning-No valid video stream defined.
>     >     ortp-message-call answered.
>     >     linphonec> ortp-message-MS ticker priority set to max
>     >     ortp-message-alsa_open_r: opening default at 8000Hz, bits=16,
>     stereo=0
>     >     ortp-warning-alsa_set_params: periodsize:256 Using 256
>     >     ortp-warning-alsa_set_params: period:8 Using 8
>     >     ortp-message-alsa_open_r: Audio params set
>     >     ortp-message-linphone process event get a message 15
>     >
>     >     ortp-message-CALL_ACK
>     >     ortp-message-speex_ec: starting receiving echo signal
>     >     ortp-warning-No ref samples, using silence instead
>     >     ortp-message-alsa_open_r: opening default at 8000Hz, bits=16,
>     stereo=0
>     >     ortp-warning-alsa_set_params: periodsize:256 Using 256
>     >     ortp-warning-alsa_set_params: period:8 Using 8
>     >     ortp-message-alsa_open_w: Audio params set
>     >     ortp-message-bandwidth usage: audio=[d=240.3,u=115.7]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-warning-Reference stream is back.
>     >     ortp-message-bandwidth usage: audio=[d=81.0,u=80.4]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-message-bandwidth usage: audio=[d=80.2,u=81.3]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-message-free transaction ressource 4 92027019
>     >     ortp-message-free nict ressource
>     >     ortp-message-bandwidth usage: audio=[d=81.2,u=81.5]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-warning-No ref samples, using silence instead
>     >     ortp-warning-Reference stream is back.
>     >     ortp-message-bandwidth usage: audio=[d=78.4,u=79.6]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-message-bandwidth usage: audio=[d=79.5,u=82.9]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-message-bandwidth usage: audio=[d=81.0,u=81.3]
>     >     video=[d=0.0,u=0.0] kbit/sec
>     >     ortp-message-bandwidth usage: audio=[d=81.1,u=81.4]
>     >     video=[d=0.0,u=0.0] kbit/sec

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