search for: quailty

Ok this is my first post and I will try to keep it short. I have searched everywhere and haven't found an answer to my question I have two Trixbox servers that are connected over the Internet via an IAX2 connection. We are experiencing very poor sound quality. I have tried many different codecs gsm, ilbc, g729, g711 and all seem to have the same problem. (All though g729 seems to work the

Hi everybody, I need to know about sound quailty issues from those who have experience with Tormenta2 PRI Interface. Also how to make it work with new versions of Asterisk and Zaptel. And also suggestion if it is a good idea to switch to some newer card from Sangoma or Digium, or Tormenta should work fine. I have sound breaking many times a day...

...We are currently upgrading our infrastructure to use LDAP as our authentication mechanism and I intend to also have Samba look at LDAP. I had this working in a test case using 2.2 as a PDC awhile ago. Should I be using 3.0 or 2.2 for this implementation? I realize that 3.0 is still quite alpha-quailty, but I've also read one or two interview with the developers stating that 3.0 is actually more stable than 2.2 at this point and that they recommend using it. My main concern is that the LDAP schema will change again before the final 3.0 release - this is also what is making me wary of using 2...

...encoder, to convert FLAC files to opus. By using one standard and good quality headphone, My ears don't notice any difference between original mp3 files versus new opus files. 1. Is this the best method to keep audio quality when converting lossy audio to another lossy audio? 2. Is there any quailty loss in this method? if yes, is it noticeable? how much is it? THANKS FOR HELP

I compiled speex1.2 on my linux box and they used speexenc to transcode an 16khz 16bit PCM mono wav file into speex. I used quailty 4. When I try and decode the file with speexdec back into the wav I get an error unknown nb_cbl request 39 and then a segmentation fault. Any ideas? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20070531/534c7e0...

...jean-marc.valin at usherbrooke.ca> Betreff: Re: [Speex-dev] Fwd: Re: Fixed Point on wideband-mode: Single Frame loss on 2000 Hz sine causes "freak off" Hi Jean-Marc, The codec mostly does not recover, it stays instable. I have attached a screenshot of the 2 waveforms of the output for quailty 7, complexity 2: The upper one is for a 2000 Hz, -15 dB input, the other one for 2200 Hz input. You see the frame loss 2 seconds after start, and approx. 1.5 seconds later this "freak out" starts. In this picuture, 2200 Hz looks worse, but in fact, I can stabilize the 2200 Hz output by se...

I finally got RC3 built on my home machine (had to sneakernet in a tarball of libcurl to get it to build :-( ) and started testing it out on the range of quality levels, side by side with lame using it's range of vbr quailty modes. Overall, it sounds pretty good, but I haven't really tested a good range yet, as I ended up starting on udial.wav... vorbis handles it ok up to quality 3, but from 4 onwards (presumably a high frequency cutoff is removed) there are very obvious artifacts, and they continue to be pre...

Greetings fellow listers, I have an application where I have approximately 300 files that I playback individually or in blocks to simulate "text-to-speech" in a "less mechanical" voice than normal Allison files provide. These files are presently in GSM format and sound pretty good when I play them on my computer speakers or on my in-house

After playing with the vorbis code for a while and doing tons of hacks and analysis on it, I've found it to perform very poorly with impulse signals. The MDCT seems to cause lots of spreading, and it seems to result in much worse impulse performance then mp3. What is the current plan on handling this? Will a smart quantizer be able to avoid it? I've been looking at various ways of