Speex dev - Dec 2006 - speex 1.2beta1 encoding/decoding clicking noise on WM2003

I am running speex 1.2beta1 on WM2003 using FIXED_POINT option, I got big
clicking noise during encoding or decoding randomly, I got more noise if I
spoke louder or made the MIC sensitivity higher, for example, when I encode
the wav file to spx file, the original saved wav file does not have such
noise, the noise is added only after it's converted to spx format. The
floating point version of libspeex library does not give me such noise(but
runs slow of course). Any suggestions?

Thanks a lot!

Yanxin
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.xiph.org/pipermail/speex-dev/attachments/20061204/942bec79/attachment.html

Check that the recording level isn't too high. Samples should never
reach saturation (+-32767) and should generally be less than 16384 to
have good results.

	Jean-Marc

Yanxin Cui a ?crit :
> I am running speex 1.2beta1 on WM2003 using FIXED_POINT option, I got big
> clicking noise during encoding or decoding randomly, I got more noise if I
> spoke louder or made the MIC sensitivity higher, for example, when I encode
> the wav file to spx file, the original saved wav file does not have such
> noise, the noise is added only after it's converted to spx format. The
> floating point version of libspeex library does not give me such noise(but
> runs slow of course). Any suggestions?
> 
> Thanks a lot!
> 
> Yanxin
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Speex-dev mailing list
> Speex-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev

Would it help if I scale the input wav data before encoding to spx? One
interesting thing is if I encode the same wav file to spx(or decode the same spx
file to wav ) on Windows platform, then there is no such big clicking noise,
samething is true if I use floating_point speex library to encode/decode on
WM2003. Problem happens only on WM2003 using FIXED_POINT library.

Thanks

Yanxin


----- Original Message ----- 
From: "Jean-Marc Valin" <jean-marc.valin@usherbrooke.ca>
To: <ycui@wmsvision.com>
Cc: <speex-dev@xiph.org>
Sent: Tuesday, December 05, 2006 4:53 PM
Subject: Re: [Speex-dev] speex 1.2beta1 encoding/decoding clicking noise on
WM2003

> Check that the recording level isn't too high. Samples should never
> reach saturation (+-32767) and should generally be less than 16384 to
> have good results.
> 
> Jean-Marc
> 
> Yanxin Cui a ?crit :
>> I am running speex 1.2beta1 on WM2003 using FIXED_POINT option, I got
big
>> clicking noise during encoding or decoding randomly, I got more noise
if I
>> spoke louder or made the MIC sensitivity higher, for example, when I
encode
>> the wav file to spx file, the original saved wav file does not have
such
>> noise, the noise is added only after it's converted to spx format.
The
>> floating point version of libspeex library does not give me such
noise(but
>> runs slow of course). Any suggestions?
>> 
>> Thanks a lot!
>> 
>> Yanxin
>> 
>> 
>>
------------------------------------------------------------------------
>> 
>> _______________________________________________
>> Speex-dev mailing list
>> Speex-dev@xiph.org
>> http://lists.xiph.org/mailman/listinfo/speex-dev
> 
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.409 / Virus Database: 268.15.9/571 - Release Date: 2006-12-5
> 
>