search for: denoise

On 06/04/2010 07:37 PM, Jean-Marc Valin wrote: > On 10-06-04 05:16 AM, Gurinder Singh wrote: > >> I have been developing an audio application using Speex. To reduce the >> background noise in the captured audio I have enabled the denoise >> feature and set the noise suppression level to 60. >> > There you go, don't do that. There's a reason that's not the default. If > increasing that level didn't cause artefacts, I would have set it higher > by default. > > Jean-Marc > >...

Hi I have been developing an audio application using Speex. To reduce the background noise in the captured audio I have enabled the denoise feature and set the noise suppression level to 60. Although the constant background noise is reduced but using denoise introduces a weird effect in the audio which can be described as 'Drain Pipe' effect. Has anyone faced a simiar issue with the denoise. If yes how did u manage to solve it...

Hi, I don't think this is the right list but since it is the only speex related list on the XIPH list, her it goes. Flame away if you wish or, if your feeling generous, tell me what list to post on. How do you "denoise" only without compressing the file? The documentation implies it is possible. It says on page 9 of manual.pdf, "The denoiser can be used to reduce the amount of background noise present in the input signal. This provides higher quality speech whether or not the denoised signal is encoded...

I'm not sure if this is due to the same problem, but I get the same clipping behavior when trying to use VAD+denoiser on a particular mic+speaker setup that has significant background noise (enough to really foul up the codec should the denoiser be turned off.) Leaving VAD off and transmitting continuously seems to be the only way to avoid this clipping. Another person I regularly communicate with also has...

Hello, I have been working with the denoiser in the Speex library and have a few questions. Some information before I get started: Speex version: 1.1.9 (as near as I could tell nothing new in the denoiser in cvs) Audio input: 32bit float - 48000 sample rate (the input starts from jackd) The first...

Hi. There is denoise for preprocess during encoding. The nature of my source is unpredictable and sometimes the result is better off if I dont have denoise ON when I save my encoded speex file. So, I would like to implment a real time denoise during decoding/playback time, (instead of having the denoise result saved in...

...peex_preprocess_estimate_update(....) > > I couldn't find anywhere in the code that references it- it appears to > update > the noise estimate without denoising anything- ? If so, does this > need to > be called for AGC to work, or? <p>Beats me :) I've found the denoiser to work very well on open-air microphones. <p>One thing I've found in using the preprocessor that I need to find a solution for is that sometimes the denoiser is incorrectly detecting speech as noise. This happens when a speaker speaks for a while, and the denoiser tries to remove t...

Hi, I am interested in a applying wavelets as a smoothing tool for my (1-dimensional) data. I looked into wavetresh and waveslim packages but could not quite figure out an obvious way to do this after running dwt or wt functions. Would someone be able to point me in the right direction on how to denoise univariate data using one of wavelet packages available in R? Thank you very much Jane ps kalman filter does a good job on my data but tends to dampen spikes too much so i was looking to compare its performance with wavelets denoising. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-...

Hello, The denoiser was good with a car noise or a raod noise before the r11739. But for some situation, the actual version is perfect. That's why I think that if we can adjust the agressivity of the denoiser, we can respond to all of the situations. Maybe two parameters should be enough : high or low. For the...

hi! I'm using the speex library in my RTP project (i'm using GNU ccRTP library). My program creates and destroys speex objects everytime a new RTP connection is made. But, when i test it with a client which create a connection to it one after another, the free memory decrease constantly to the point where the programs execution crash because not more free memory. It seems like the

Hi, I just downloaded http://www.speex.org/download/speex-1.1.4.tar.gz and tried to build it but the file denoise.c seems to be missing from the archive. Can you fix this or is it better to get everything from cvs? Another question, when will a stable version of 1.1 be released. I'm interested in the preprocess features but I would also like a stable encoder/decoder :-) Best regards, Chris --- >8 ---...

...ing speex as codec. Now is the time to obtain the best possible audio quality. As my PocketPC is not a smartphone my main problems are the echo cancellation and the noise. As the first one can be solved by using headphones how can i solve the second? Do someone have some hint for me regarding the denoiser as it is still not ported in fixed point? Are there other Opensource/free patents denoiser avaible for fixed point architectures? Regards Fabio P.S. I apologize for my english -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-de...

Hi, I'm trying to use a denoiser on a wince with a FIXED_POINT defined. Denoiser works OK - it removes the noise, but then it unacceptable hurts a voice. Here is a code that I use: #define TEST_DENOISE_SAMPLES 2000 void test_denoise() { FILE *fin; FILE *fout; spx_int32_t rate=0; int chan=1; int fmt=16;...

Hello, when I call my conference, I see this error in my logs: ERROR: Function DENOISE not registered here is snippet from extensions.conf ... same => n,Set(CONFBRIDGE(user,announce_join_leave)=yes) same => n,Set(CONFBRIDGE(bridge,record_conference)=yes) same => n,Set(CONFBRIDGE(bridge,record_file)=/home/asterisk/file.wav) same => n,ConfBridge(1000) sa...

Hi All I am using speex in one of my WinCE project. I have been trying to use speex to perform denoise on the captured audio packet and echo cancellation. Following behavior I have observed while using various options. I would really appreciate if you could help me with the issues I am facing. 1. Denoise: I have written the following to code to perform denoise. //To initialize speex preprocess...

Hi Jean Marc & List, So I have been fiddling with the denoiser (again). While poking around I noticed that nb_preprocess is basically a counter that is mod-ded with 100 (the default), which causes Smin[] to be re- seeded with the value in Stmp[] (min of the previous adaptation period). Smin[] is then used to update the noise probability, which is (probably)...

...dio you had in the test? It may be that nothing's wrong and the code just isn't so fast that you can do 100 channels. Or maybe it just needs a bit of optimization... Jean-Marc Le mer 31/03/2004 à 10:03, Steve Kann a écrit : > Jean-Marc Valin wrote: > > >If you set the denoiser to "on" and the VAD to "off", what difference > >does it make in CPU time? > > > > > Same program, running on Athlon XP 1700+: > > Test 1, using VAD, but AGC, denoise off: > > stevek@canarsie:~/work/hms/app_conference $ time ./vad_test >...

Hi Tom, Of course the current tuning of the denoise is approximative and could probably be improved... That being said, the modulo 100 isn't the adaptation time itself, but rather the window over which to look for minima. The main idea is this: if the power in a certain bin isn't too much higher than the minimal value for a certain window, t...

Hi I am trying to use the Denoise option of speex but unable to do so successfully. I would really appreciate if some one could help me and identify what exactly wrong i am doing... I am using below code to perform denoise. //Initialize speex preprocess state and set the denoise option int nEnable = 1;...

...system is clipping off the start of someone's speech when they first start talking- the ends of the sentences seem to be handled properly. I am wondering whether this is the fault of the audio playback system or whether this is a speex issue- I also get the musical artifacts problem with the denoiser. This seems to be more of a problem on open air mics/speaker combinations. However, this and the issues you pointed out are a minor deal in comparison with the clipping problem. Tom <p><p>At 03:40 PM 5/17/2004, Steve Kann wrote: >Tom Harper wrote: > >>Hi All & Jean...