<DIV>Hi,</DIV>
<DIV> I am very glad to enter this mail list. i am a new guy,i am interested in speech coding.so is there anybody working on this ? please contact me,thank you.</DIV>
<DIV>i am studing on fixed codebook search. and i have read almost all the articals(including patent on this) about codebook search. but i found that all the suboptimize methods have their own flaw. could anybody have some comments on this?thank you very much.</DIV>
<DIV> </DIV>
<DIV> To today's topic: 1、i am not familiar with arm platform,so i am sorry i can not help you.</DIV>
<DIV> </DIV>
<DIV ></DIV><BR>在2007-07-23，speex-dev-request@xiph.org 写道：<BR>
<BLOCKQUOTE id=isReplyContent style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><PRE>Send Speex-dev mailing list submissions to
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Today's Topics:
1. can't cross-compile speex-1.2beta2 in ARM platform ( ? )
2. Re: Server Side AEC (Tabitha Flash)
----------------------------------------------------------------------
Message: 1
Date: Fri, 20 Jul 2007 22:23:11 +0800
From: " ? " <baoweiqin@gmail.com>
Subject: [Speex-dev] can't cross-compile speex-1.2beta2 in ARM
platform
To: speex-dev <speex-dev@xiph.org>
Message-ID:
<45ac4c5c0707200723l5bd4b4cew5b3a17fa655dda80@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Dear Sir,
> I'm trying to cross-compile speex-1.2beta2 in ARM platform. I configured
> the lib as "./configure --host=arm-linux ",it was right.While I did make
> ,I got an error like this,
> /usr/local/arm/lib/gcc-lib/arm-linux/3.2.3/../../../../arm-linux/bin/ld:
> .libs/lsp_tables_nb.o: Relocations in generic ELF (EM: 3)
> .libs/lsp_tables_nb.o: could not read symbols: File in wrong format
> collect2: ld returned 1 exit status
> make[2]: *** [libspeex.la <http://libspeex.la>] Error 1
> make[2]: Leaving directory `/home/bao/speex-arm/libspeex'
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory `/home/bao/speex-arm'
> make: *** [all] Error 2
>
> Could anyone explain how to get rid of this error,thanks!
> Weiqin Bao
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Message: 2
Date: Sun, 22 Jul 2007 14:51:28 +0100 (BST)
From: Tabitha Flash <tabitha_flash@yahoo.co.uk>
Subject: Re: [Speex-dev] Server Side AEC
To: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
Cc: speex-dev@xiph.org
Message-ID: <675806.41850.qm@web86910.mail.ukl.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jean-Marc,
Regarding you points:
1) Is it ok if the audio is encoded (using Nelly Moser ASAO) and sent to the client and decoded when it is recevied so the AEC is always performed on raw PCM16 8KHZ ?
2) The audio is moved in 32ms (512 byte) chunks and the reading and writing to the AEC code will be done by separate threads at regular 32 ms intervals.
3) Occasionaly audio is dropped if it has become delayed but a jitter buffer of 120ms is in use.
People at different distances from the server will have a slightly different round trip time. Do you think if using a large tail or something we can get near perfect AEC? The same as you get with a hands free phone perhaps?
Does it still sound like worth a try? Is Speex AEC as good as it gets or would it be worth contacting some vendors of such software?
Thanks again,
Tabby
Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote: Tabitha Flash a écrit :
> Hi, I am looking for AEC software which can be run on the server
> side. This means there will be a fairly constant 600ms or so gap
> between sending out an audio frame and getting it back with echo.
> Could Speex AEC be configured to handle these conditions?
Just use a ring buffer to put the delay back to normal.
> If so, how
> good can I expect it to be?
You'll need to try, but to have any chance of working, the following
conditions must be met:
1) No codec must be used in the echo path (maybe G.711 is OK)
2) There must not be any drift in the sampling clocks
3) There must not be any audio samples lost on the echo path
Jean-Marc
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