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munich
2010 Feb 10
0
Speex-dev Digest, Vol 69, Issue 8
..."Re: Contents of Speex-dev digest..."
>
>
> Today's Topics:
>
> 1. Stereo AEC (Nicholas Xu)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 9 Feb 2010 22:58:58 +0800
> From: Nicholas Xu <xunich at gmail.com>
> Subject: [Speex-dev] Stereo AEC
> To: speex-dev at xiph.org
> Message-ID:
> <de841d8e1002090658o7c26c4bag20b99bd305c422f9 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi,
>
> Can anybody show me how to enable stereo...
2006 Nov 02
2
echo cancellation on PDA
Hello all,
Today I tried speex echo cancellation on my VoIP application running
on a windows mobile based PDA (OMAP1510 168MHz). The result is
disappointing: it takes 150-250 ms to do echo cancellation (by calling
speex_echo_capture() ) for a 20 ms frame!
I've defined the FIXED_POINT macro. Is there anyway to do some optimization?
Nick
2010 Feb 09
1
Stereo AEC
Hi,
Can anybody show me how to enable stereo AEC, I tried with the
following code and the result is bad, degraded output.
Init:
ec_state = speex_echo_state_init_mc(frame_size, aec_tail, 2, 2);
speex_echo_ctl(ec_state, SPEEX_ECHO_SET_SAMPLING_RATE, &sample_rate);
preprocess_state_left = speex_preprocess_state_init(frame_size, sample_rate);
preprocess_state_right =
2006 Nov 02
2
echo cancellation on PDA
2006/11/2, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>:
> > Today I tried speex echo cancellation on my VoIP application running
> > on a windows mobile based PDA (OMAP1510 168MHz). The result is
> > disappointing: it takes 150-250 ms to do echo cancellation (by calling
> > speex_echo_capture() ) for a 20 ms frame!
>
> Are you by any chance using an insane
2006 Nov 02
1
echo cancellation on PDA
I did the test on another PDA which runs XScale 416Mhz CPU, the EAC
arithmetic could be done in 1ms, but for the previous PDA (TI OMAP
168Mhz), it take more than 100ms!
Though EAC could run in time on the new PDA, it did no help to cancel
the echo, here is my test scenario:
Init echo_state:
echo_state=speex_echo_state_init(160,1120);
int tmp=8000;