[Speex-dev] Acoustic echo cancellation
stevek at stevek.com
Tue Jun 21 18:30:50 PDT 2011
Speaking of AEC (thought not quite on topic for this thread),
Has anyone on this list played with the GIPS code that google just
open-sourced? It looks like their AEC also has code to handle differential
sample rates, though I haven't really evaluated it thoroughly.
There is really a lot of code in the drop basically all of the GIPS DSP
stuff (AGC, VAD, Denoise, echo canceller, etc), their transport layer,
hardware access (audio/video capture), etc. It's all wrapped up to be part
components are useable without the rest.
From: Steve Underwood <steveu at coppice.org>
Date: Wed, 22 Jun 2011 09:05:16 +0800
To: <speex-dev at xiph.org>
Subject: Re: [Speex-dev] Acoustic echo cancellation
> On 06/22/2011 04:57 AM, Arun Raghavan wrote:
>> On Tue, 2011-06-21 at 11:39 -0700, Arun Raghavan wrote:
>>> I'm also running this on x86 (x86_64, technically), and it's all
>>> floating-point, so I guess this is a regression somewhere. Will try to
>>> see if I can run it without any optimisations if possible, which I
>>> assume should serve as an adequate reference.
>> Surprisingly, if I use -O0 instead of -O2, I see a difference in the
>> output. Nothing very observable in Audacity, but the actual output
>> definitely differs.
> If you use a floating point build the output is likely to change with
> the optimisation level selected, the compiler version, and maybe even
> the day of the week :-)
>> Still trying to figure out why they're both so different from your run
>> from 5 years ago, though.
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> Speex-dev at xiph.org
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