[Speex-dev] speex 1.2beta1 encoding/decoding clicking noise on WM2003

Yanxin Cui ycui at wmsvision.com
Wed Dec 6 12:25:00 PST 2006

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.



----- Original Message ----- 
From: "Jean-Marc Valin" <jean-marc.valin at usherbrooke.ca>
To: <ycui at wmsvision.com>
Cc: <speex-dev at 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 écrit :
>> 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
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