similar to: Denoise causing drain pipe effect in audio

On Fri, 2010-06-04 at 17:28 +0530, Gurinder Singh wrote: > > Is there a way of retaining high noise suppression and still getting > better audio quality. Your pointers will be of great help. I hope people don't resent me making a point on this, as I don't actually know how the noise suppression in speex works, but I have some knowledge in the area of noise suppression. In

On 10-06-04 08:31 AM, Henry Gomersall wrote: > I hope people don't resent me making a point on this, as I don't > actually know how the noise suppression in speex works, but I have some > knowledge in the area of noise suppression. > > In general, if you have information about the nature of the noise you > are trying to suppress, you can do much better than just assuming

Hi Jean Thanks for the reply. We expect to use the codec in an environment where we expect very high background noise where high noise suppression will be needed. In a situation like a soccer match. Is there a way of retaining high noise suppression and still getting better audio quality. Your pointers will be of great help. Thanks, Gurinder On 6/4/10, Jean-Marc Valin <jean-marc.valin at

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

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

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 into speex-encoded file). Is there such denoise-preprocess function that runs

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) same =>

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

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; SpxPreprocessState = speex_preprocess_state_init(160, 8000);

> 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? You're using Windows, right? The project file is simply out of date. The denoise.c file has been renamed to preprocess.c > Another question, when will a stable

Andy Ross <andy@plausible.org> wrote: > > Tom Grandgent wrote: > > Andy Ross wrote: > > > I wrote a trivial squelch feature* in 10 minutes that works > > > basically 100% of the time. > > > > Could you please explain how this differs from VAD? > > Not knowing how VAD works, I can't say for sure. But enabling > VAD wasn't catching

Jean-Marc Valin wrote: > Andy Ross wrote: > > Not knowing how VAD works, I can't say for sure. > > There are many ways to implement a VAD. I meant "not knowing how speex's VAD works", of course, not VAD in general. If you would stop interpreting everything I say in the least charitable manner, this might be going more smoothly than it is. (Tom was right, by the

On 5/26/23 01:15, Fourhundred Thecat wrote: > how do I fix this? > What do I have to do to "register" denoise ? confbridge.conf states: "Requires func_speex to be built and installed." I am guessing you have not fulfilled that requirement. Doug -------------- next part -------------- An HTML attachment was scrubbed... URL:

Andy Ross a ?crit : > I'm having trouble with the preprocessor's noise reduction feature. > The basic issue is that it simply doesn't work very well. > > With my laptop (whose microphone is otherwise quite capable) I > routinely hear transient background noise, typing, and other "quiet" > sounds leaking through to the speex stream. Even worse, the AGC >

> That is true for distinguishing it by waveform, but not by amplitude. > As I mentioned, these transients are objectively tiny. *Your* transients may be "tiny" and in any case, it doesn't help if you don't know the level you're recording at. I guess I'd be > curious as to which voice codec applications require no squelch (other > than trivial examples

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

I'm having trouble with the preprocessor's noise reduction feature. The basic issue is that it simply doesn't work very well. With my laptop (whose microphone is otherwise quite capable) I routinely hear transient background noise, typing, and other "quiet" sounds leaking through to the speex stream. Even worse, the AGC feature is blowing these things up into just awful

> OK, then the problem is that I misunderstood the feature. I assumed > that dynamic squelch was part of it, but it's really something more > along the lines of active noise cancellation. That's fine, I'll work > on improving my own squelch code. No. Active noise cancellation is yet another thing, where you cancel the noise in the "acoustic world" by

Andy Ross <andy@plausible.org> wrote: > > I wrote a trivial squelch feature* in 10 minutes that works > basically 100% of the time. > > * Zero the sample data if the maximum sample in a frame is less than > 4% of saturation or 20% of the maximum sample yet seen. It's about > 8 lines of code. Could you please explain how this differs from VAD? Tom

There are many ways to implement a VAD. What you described is actually perfectly equivalent to the most trivial (and least robust) VAD algorithm. Jean-Marc Andy Ross wrote: > Ton Grandgent wrote: >> Andy Ross wrotte: >>> I wrote a trivial squelch feature* in 10 minutes that works >>> basically 100% of the time. >> Could you please explain how this differs from