search for: silence

Hi all, I'm getting some noise gate like effects on our sip lines & I think I need to disable silence supression, I'm searching docs & not finding where this can be set, does * have a setting to turn this off? basically what's happening is when we stop talking, the other end hears total silence, but when we talk, they can hear the background noise in the office, this sounds odd to the r...

I upgraded from 1.0.9 to 1.2.1. In 1.0.9 everything worked perfect. Now, I call in my IVR, and after navigating in menus when I get dialtone for dialing extension, Sound is choppy and I get bunch of messagess: -- Silence suppression is disabled (option_silence_suppression=0 chan->timingfd=30) -- Silence suppression is disabled (option_silence_suppression=0 chan->timingfd=30) -- Silence suppression is disabled (option_silence_suppression=0 chan->timingfd=30) -- Silence suppression is disabled (option_silenc...

Okay, you've answered part of my question, which is "What value equals silence?". I assume then that a (decoded) frame of silence would be a buffer the size of my frame (320 bytes) full of 0's. Passing this frame (a frame of all 0's) through the encoder causes it to blowup though.. In response to your answer below, I don't think I want to overwrite t...

hi, I was wondering how perfect silence frames (no audio at all) in a PCM stream are encoded by the flac encoder. Suppose I have a PCM audio file with some perfect silence frames in the beginning and at the end of the audio recording and suppose I have the same audio file but without the silence frames in the beginning and at the end (so...

I am currently experiencing intermittent silences with my asterisk system. The symptoms are as follows: * Both for incoming and outgoing calls, I (and other users) occasionally experience a brief period of silence. * The silence lasts anywhere from 3 to 10 seconds. * It is not due to silence suppression, because the silences generally occu...

I have a call server that runs on a few custom AGI scripts initiating calls and then managing the calls. I'm getting stuck on the detecting silence functions. I wanted to use the silence detecting as a quick method of substituting Answering Machine Detection. However, whenever WaitForSilence is supposed to be detecting silence, it always just ends the interval whether or not there is actual silence. If I'm still talking, it will consid...

I have a call server that runs on a few custom AGI scripts initiating calls and then managing the calls. I'm getting stuck on the detecting silence functions. I wanted to use the silence detecting as a quick method of substituting Answering Machine Detection. However, whenever WaitForSilence is supposed to be detecting silence, it always just ends the interval whether or not there is actual silence. If I'm still talking, it will consid...

...est@xiph.org > > You can reach the person managing the list at > speex-dev-owner@xiph.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Speex-dev digest..." > > > Today's Topics: > > 1. RE: frame of silence (David Hogan) > 2. RE: frame of silence (Chris Cowden) > 3. RE: frame of silence (David Hogan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 15 Feb 2007 07:37:25 +1100 > From: "David Hogan" <dav...

...everything better. However, we have a small feature requests for speexenc that would make things perfect for us: Support for trimming the start and end of the sound away, during the encoding process. This feature request consists of two things: 1) support for automatic detection and trimming of silence at the start and end of the sound out. 2) support for intentionally skipping the very first and very last parts of the input WAV, even if it is not silence. This is because we record a lot of small sentences using a recording tool on the PC - we are talking hundreds of sentences. Every time the a...

hi, How do i detect whether there is silence in media using speex? Is there any API which decides that the audio data only contains silence? Basically i will have PCM linear data, I want to know whether it is complete silence. Is it that during encoding speex_bits_write will return a lesser number if the audio at byte_ptr conta...

...job. It's definitely not a job for speexenc, which I'd like to keep > simple. Fair enough. Which batch programs should I be looking for? I had a look around, and could not find any... The reason speexenc seems like a good place to do this, is that it already have the routines to detect silence, and I figured it would be relatively easy to implement based on that. Failing to find a suitable batch program, we will probably make a local patch for this - maybe you can help us a bit by giving a few pointers for how to do this in speexenc? Thanks, Asger > Le ven 09/01/2004 à 17:37, Asger...

Hello! As I see there is dsp_drop_silence switch in confbridge. Could you tell me how asterisk detects silence? Is it possible to change silence level, so, let's say some not loud enough background noises will be recognized as silence and only loud enough human voice will be recognized as sound? Thank you!

Hi, I'm new to this list. I'm using Speex as the base codec in a voice chat application (with DirectSound as the audio playback/capture interface). To help me debug some of my network-related issues, I would really like to insert frames of "silence" into speech. Is there a convenient function call or API call that takes in a buffer that is the size of a frame and writes a frame of "silence" to it? I'm not sure if I'm wording the question well, so any feedback would be greatly appreciated! Btw, I am really enjoyi...

...al PBX and reach Asterisk, the IVR system on Asterisk answers the call and I can dial an extension (for example 42 that is on the traditional PBX). In the asterisk dialplan I've set to transfer the call using Flash() like in this example: exten => 42,1,Flash() exten => 42,2,Background(silence/1) wait 1 second for the traditional PBX exten => 42,3,SendDTMF(42,250) exten => 42,4,Background(silence/1) wait 1 second for the traditional PBX exten => 42,5,Hangup() When I dial the extension 42, the phone 42 on the traditional PBX rings but when I answer there isn't communica...

...e encoder 'blowup' when passed a frame of zeroes to encode? What version of speex are you using? ________________________________ From: Chris Cowden [mailto:ccowden@ncsoft.com] Sent: Thursday, 15 February 2007 7:57 AM To: David Hogan; speex-dev@xiph.org Subject: RE: [Speex-dev] frame of silence Okay, you've answered part of my question, which is "What value equals silence?". I assume then that a (decoded) frame of silence would be a buffer the size of my frame (320 bytes) full of 0's. Passing this frame (a frame of all 0's) through the encoder causes it to...

...ations (as i have . . . and do). What i would like to have, which would _very_ much simplify what's involved in writing the code for certain things i have in mind, is (let me just say this and clarify it afterward) a callback mechanism (perhaps) that notifies me whenever a period of (relative) silence begins . . . or ends. I'm thinking about multiplexing different content streams that aren't really generated together in real time but that i want to "produce" (time-delayed) to sound as if they were (taking out the silences introduced by the time-delay involved in the propagatio...

Per my conversation below with digium, are there any legal alternatives to digium's G729? It is out of date, and doesn't support VAD nor silence detection. Digium has stated that they have no plans to update it anytime soon. VAD/Silence is a big deal with major carriers and we are having to fight a battle to get them to make special arrangements to turn off VAD/Silence in their equipment. Most won't. RFC3389 states that G729 Annex...

...eex-dev/2008-August/006860.html It won't perform any miracles, but I think it works pretty well and is easy to tweak. Tom >---- Original Message ---- >From: jmorion at toomeeting.com >To: speex-dev at xiph.org >Subject: Re: [Speex-dev] preprocessor VAD only rocognize between >silence andnot silence >Date: Mon, 15 Dec 2008 12:41:53 +0100 > >>Hi, i would like if someone has experienced the same problem and if >im >>using the preprocessor VAD correctly. >> >>A Voice Aactivity Detector is spected to detect human voice (using >FFT >>and ma...

Does anyone how you might detect a period of x milliseconds of silence using AGI ? Rgds, Stuart

...n repeat the instructions if no keys are pressed. The problem of course is if the user doesn't start pressing keys during the Background() call and delays until the Wait() application is called, those keys are lost. I had solved this some time back by creating a few random length files of silence, that would replace Wait() routines in some circumstances. I have finally created a formal measured group of files, each with 1-10 seconds of silence, and put them in my sounds directory for public consumption. Not a big deal for most of you to create these files yourselves, but perhaps a min...