search for: squelch

Jean-Marc Valin wrote: > Andy Ross wrote: > > Uh, production applications almost always require squelch, no? > > Some do, some don't. In general, distinguishing between a keyboard > and a speech transient is next to impossible based only on a few ms > of speech. That is true for distinguishing it by waveform, but not by amplitude. As I mentioned, these transients are objectively tiny...

...suppressor will only attempt to remove stationary noise, > such as thermal noise, fans, ... The AGC can indeed do strange > things in these cases, but it's been improved in svn (compared to > 1.2beta1). 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. > Congratulations. If it works better on your data, then use it. It'll > just fail miserably in other conditions, but you may...

I've made squelch-1.0beta5 and uploaded it - you can find it linked from http://www.geoid.clara.net/rik/squelch.html This version has a config dialog. It works out which output drivers libao has available and gives you a choice. You can also tell it where your 'audio dir' is - though that works a bit strang...

Hi, I released Squelch 1.0beta9. It's a multi-platform Ogg Vorbis player, if you haven't heard of it. [1] Find it here: http://www.geoid.clara.net/rik/squelch.html Differences from beta8: * Vorbis comment editor ! [2] * More intelligent re-initialisation of output driver. * Stupid bugs in auto-update of maste...

...y like to play with. It works for me (tm) and I like it. If you don't, well, you know what you can do with it ;) I leave it running 24/7 and it plays my music without problems and without annoying me. That's all it's for, really. You can get it from http://www.geoid.clara.net/rik/arch/squelch.tar.gz The README follows ... Cheers, Rik ---------------------- README for squelch beta 2 ---------------------- Squelch beta 2. Supports: Input : Ogg Vorbis. Output : ALSA, aRts, esd, IRIX, OSS, NULL, Solaris and WAV. Features: * Play button. * Stop button. * Other buttons. * Playl...

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 VAD? > > Not knowing how VAD works, I can't say for sure. But enabling > VAD wasn't catching the existing transients (see original post), > and th...

<ad> .q.u.e.l.c.h is an audio player dedicated to Ogg Vorbis. This is a bugfix release. RPMs available for i386, i486, i586, i686 and Athlon. Source available as tar.gz, tar.bz2 and src.rpm. http://www.geoid.clara.net/rik/squelch.html Tested on Linux, may work elsewhere. Requires only Vorbis, libao and Qt (compiled with thread support.) </ad> Have fun ;) Rik --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to...

...I thought I'd get this released now, because I'm off to a party for the next few days and I couldn't leave beta9 as the latest with that repaint bug in it. I don't have time to release it via SourceForge, but I uploaded the tarball to my homepage at http://www.geoid.clara.net/rik/squelch.html Have fun ! Cheers, Rik --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is ne...

...t 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 like push-to-talk interfaces). Especially in > the presence of the AGC feature, it seems pretty much required to me. > (I'll try the svn code, though. It may be that a better AGC would > eliminate the need for squelch.) As surprising as it may sound...

Hello vorbis, I'm chasing something to record the output of a radio scanner for long periods. It really needs to be able to split files (start a new output file every X MB), not record silence (the scanner sends no signal when there's no transmission, rather than sending static), and run under windows (because that's the requirement, ok). A command line app would be fine... Ideally it

...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 explosions and whines. Honestly, it works so badly that I wonder if I'm doing something wrong. 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. I'm using the 32KHz ultra wide band mode with 16 bit sample data and...

...rything I say in the least charitable manner, this might be going more smoothly than it is. (Tom was right, by the way, I was presuming that DENOISE was the feature at fault, but he's convinced me that I should really be looking at VAD) What I implemented is, in the strict sense, called "squelch". As an algorithm, it predates digital signal processing by several decades. Here is a quick definition and overview if you aren't familiar with analog stuff: http://en.wikipedia.org/wiki/Squelch It is not a sexy algorithm, and you won't find many academic papers on it. But (and To...

> 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 destructi...

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 V...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, When making a call like the one below, I get double DTMF tones on the PSTN side. DTMF tones sent from the PSTN arrives squelched on the SIP side. SIP > Asterisk2 > IAX2 > Asterisk1 > ZAP > PSTN SIP has been configured to use rfc2833 on both the SIP endpoint and the Asterisk. SIP endpoint also suggests a payload value of 101. Sending DTMF inband instead of via rfc2833 however eleminates the double DTMF b...

I've got a dumb Western Electric payphone and some homebuilt hardware to control the coin relay which is accessible to Asterisk through the AGI interface. I'd like to be able to set the state of the coin relay to collect at the end of a call if a called party answers. [Hey, I admit this project is being persued just for the fun of it ] Looking through the documentation, there is a way to

...er? Or if RecLockLatencyMs were increased to 5000ms, should some other setting be changed in proportion? We're using a geo-distributed etcd cluster for the CTDB recovery lock and I noticed a "*High RECLOCK latency"* (of 4s) message in syslog, and just wanted to see if we could safely squelch the warning, and if so, how? Thank you, -- BOB BUCK SENIOR PLATFORM SOFTWARE ENGINEER SKIDMORE, OWINGS & MERRILL 7 WORLD TRADE CENTER 250 GREENWICH STREET NEW YORK, NY 10007 T (212) 298-9624 ROBERT.BUCK at SOM.COM

I also added a .desktop file for Gnome/KDE so that you can click on squelch from your panel etc. No icon right now - tmake doesn't support installing, so it's quite difficult to get that to work. Also I put a tiny script called 'squelch_wrapper' in the dist, which sets your LD_LIBRARY_PATH before running squelch - this way, you get the right Qt library lo...

hi all I'm being spammed by these messages in the console (see below) and sound doesn't work with today's cvs. I rolled back a week, and it works fine. In addition to the sound problems, I had to enable inband dtmf squelch on the dilnk mgcp phones. if not, each pressed key was counted twice NOTICE[245776]: File chan_mgcp.c, Line 710 (mgcp_rtp_read): MGCP ast_dsp_process NOTICE[245776]: File chan_mgcp.c, Line 710 (mgcp_rtp_read): MGCP ast_dsp_process NOTICE[245776]: File chan_mgcp.c, Line 710 (mgcp_rtp_read): MG...

Hello Mark, The resulting 8 bit file has a lot of squelching noise compared to the 16 bit output from OPUS decoder. During encode I am using popi16fmtBuffer[ui32Loop] = (opus_int16)pcRdBuf[ui32Loop]; And during decode since the data is in the lower 8 bit I use pc8bitSamples[ui32Loop] = ((unsigned short)pcop16OutBuf[ui32Loop] ^ 0x80); Regards Amit On...