CELT 0.9.1 is out!, Help wanted |
CELT 0.9.1 is out!, Help wanted |
 Nov 16 2010, 02:56
Post
#1
|
|
|
Xiph.org Speex developer Group: Developer Posts: 431 Joined: 21-August 02 Member No.: 3134  |
Hi,
I'd like to announce CELT version 0.9.1. There have been many quality enhancements since 0.8.x and even more so since the last version announced on HA. You can get it from the CELT website. Also, CELT is now a component of the Opus codec, which is in the process of being standardized by the IETF as a lossy audio codec for interactive applications. Also, for those who would like to help, we are looking for volunteers to help tune the codec. The bit-stream is (finally) about to be frozen, so any quality improvements we can get before then is useful. No highly specialized skills required, just good critical listening abilities. As a first round, I'd be interested in comments and rankings of the following four audio files: fileA.wav fileB.wav fileC.wav fileD.wav The bit-rate is fairly low (64 kb/s), so artefacts are easy to hear. This is the original (uncompressed) file. I'm interested in a quality ranking of all these four files (especially the ones that sound similar). I'll reveal the contents of these files after people have responded. |
 |
 
|
 |
|
Dec 30 2010, 20:55
Post
#2
|
|
|
Group: Members Posts: 1315 Joined: 3-January 05 From: Argentina, Bs As Member No.: 18803 |
Aparently CELT scales good with higher bitrates.
CELT 0.10.0 vs Aotuv at 96 kbps: http://downloads.xiph.org/audio/demo/celt1...-0.10.0-96.flac headphones HD650  ABX, ABC/HR + comments h*tp://www.mediafire.com/?tuc27jkhahjwesy This post has been edited by IgorC: Dec 30 2010, 21:15 |
|
|
|
|
Dec 31 2010, 05:34
Post
#3
|
|
|
Xiph.org Speex developer Group: Developer Posts: 431 Joined: 21-August 02 Member No.: 3134 |
QUOTE (IgorC @ Dec 30 2010, 14:55)  Aparently CELT scales good with higher bitrates. CELT 0.10.0 vs Aotuv at 96 kbps: http://downloads.xiph.org/audio/demo/celt1...-0.10.0-96.flac headphones HD650 ABX, ABC/HR + comments h*tp://www.mediafire.com/?tuc27jkhahjwesy Thanks very much for these results. Testing higher rates is something I wanted to do for a while. What you're reporting is very good news. If you have time, it'd be interesting to also compare with the appropriate AAC profile (not sure which profile is best at that bitrate). Also, do you have a way to actually build CELT from the source code? If so, it would be interesting if you can play around with it and see on what kind of files we should be trying to improve quality. |
|
|
|
jmvalin CELT 0.9.1 is out! Nov 16 2010, 02:56
punkrockdude I think, after several listenings, that A sounds b... Nov 19 2010, 19:18 Primius In file A i noticed warbling distortion on guitars... Nov 20 2010, 00:21 IgorC logs h*tp://www.mediafire.com/?7ed142tcipntet1 Nov 21 2010, 02:25 jmvalin Thanks very much guys. I guess I should start by t... Nov 21 2010, 03:45 IgorC logs h*tp://www.mediafire.com/?t8ko84f34bz8b5f
Th... Nov 22 2010, 20:32
jmvalin QUOTE (IgorC @ Nov 23 2010, 05:32)
The ... Nov 23 2010, 02:16 IgorC QUOTE (jmvalin @ Nov 22 2010, 23:16) Than... Nov 23 2010, 04:20 jmvalin QUOTE (IgorC @ Nov 23 2010, 12:20) QUOTE ... Nov 23 2010, 05:19 IgorC All right, I will test fileL later.
There was an... Nov 23 2010, 03:38 IgorC Sample I is still preferable but there is no stati... Nov 27 2010, 04:51 IgorC Description of artifacts.
1st sample. Samples H a... Nov 28 2010, 05:00 jmvalin Thanks again for taking the time to listen to thos... Dec 8 2010, 15:29 IgorC What encoders did you used for Vorbis and HE-AAC?
... Dec 8 2010, 20:37 jmvalin QUOTE (IgorC @ Dec 9 2010, 04:37) What en... Dec 9 2010, 02:25 jmvalin QUOTE (jmvalin @ Dec 9 2010, 10:25) Regar... Dec 9 2010, 02:36 IgorC Chris has made tremendous work on compilation of ... Dec 9 2010, 03:51 jmvalin QUOTE (IgorC @ Dec 9 2010, 11:51) Chris h... Dec 9 2010, 06:01 IgorC Logs h*tp://www.mediafire.com/?c54du2c2b95mjsn
Ma... Dec 9 2010, 05:07 jmvalin Thanks again for the results. I'll investigate... Dec 9 2010, 14:47 jmvalin QUOTE (jmvalin @ Dec 9 2010, 22:47) Thank... Dec 9 2010, 21:31 IgorC Sample X did better on speech but still has low fr... Dec 10 2010, 04:30 jmvalin Wow, thanks very much for all these results. I... Dec 10 2010, 15:38 SebastianG Hi Jean-Marc,
I just skimmed through some parts o... Dec 10 2010, 16:10 jmvalin QUOTE (SebastianG @ Dec 11 2010, 00:10) I... Dec 10 2010, 19:34 SebastianG QUOTE (jmvalin @ Dec 10 2010, 19:34) QUOT... Dec 10 2010, 20:40 jmvalin QUOTE (SebastianG @ Dec 11 2010, 05:40) I... Dec 10 2010, 20:48 IgorC Jean-Marc,
How does CELT scale with higher bitrat... Dec 10 2010, 19:01 jmvalin QUOTE (IgorC @ Dec 11 2010, 03:01) How do... Dec 10 2010, 19:25 jmvalin QUOTE (IgorC @ Dec 10 2010, 13:01) How do... Feb 15 2011, 02:04 jmvalin OK, so I've worked a bit on improving some of ... Dec 10 2010, 23:36 IgorC Jean-Marc,
What do you plan for test of CELT? If... Dec 13 2010, 22:01 jmvalin QUOTE (IgorC @ Dec 13 2010, 16:01) What d... Dec 13 2010, 22:25 IgorC Jean-Marc,
I see that version 0.10.0 has been rel... Dec 24 2010, 00:34 NullC QUOTE (IgorC @ Dec 23 2010, 16:34) Jean-M... Dec 24 2010, 02:02 IgorC The differences are small.
The results with HD650... Dec 24 2010, 19:35 C.R.Helmrich QUOTE (IgorC @ Dec 24 2010, 20:35) Fatboy... Dec 25 2010, 21:23 IgorC Hi, Chris.
Actually the question was about the po... Dec 26 2010, 04:32 IgorC I think it can be worth to redo the last test or d... Dec 26 2010, 09:39 IgorC I've tried several time with HD650 and HD447. ... Dec 29 2010, 23:26 IgorC QUOTE (jmvalin @ Dec 31 2010, 01:34) If y... Dec 31 2010, 06:00 IgorC 96 kbps:
LC-AAC info: iTunes 9.0.0.70, 96 kbps, VB... Dec 31 2010, 08:43 IgorC Maybe CELT should compete not only with LD-AAC but... Dec 31 2010, 18:44 rt87 I wonder if someone can do 48kbps tests comparing ... Jan 1 2011, 01:59 IgorC You can have an idea basing on results of 64 kbps ... Jan 1 2011, 14:32 NullC Anyone following along with the CELT technical dev... Jan 26 2011, 02:09 jmvalin OK, so we've been a bit quiet lately but worki... Jan 28 2011, 00:36 IgorC The artifacts of both files have very similar natu... Jan 28 2011, 14:48 jmvalin QUOTE (IgorC @ Jan 28 2011, 08:48) The ar... Jan 29 2011, 06:24 IgorC 0.11.0 has been released. Good news.
I wonder tha... Feb 5 2011, 02:50 sauvage78 Personnaly I have some interest in it, but I need ... Feb 5 2011, 04:54 jmvalin A few things I'd like to say here about CELT t... Feb 5 2011, 05:20 IgorC QUOTE (jmvalin @ Feb 5 2011, 01:20) If bi... Feb 5 2011, 18:39 NullC QUOTE (IgorC @ Feb 5 2011, 09:39) PS. It... Feb 7 2011, 05:42 jmvalin QUOTE (NullC @ Feb 6 2011, 23:42) I would... Feb 7 2011, 05:53 Ljubo44 QUOTE (NullC @ Feb 7 2011, 06:42) In any ... May 23 2011, 20:40 sauvage78 One of the reason why I wait for a CLI encoder/dec... Feb 5 2011, 06:20 IgorC QUOTE (sauvage78 @ Feb 5 2011, 02:20) Sor... Feb 5 2011, 06:34 jmvalin QUOTE (sauvage78 @ Feb 5 2011, 00:20) Sor... Feb 5 2011, 12:53 [JAZ] @sauvage:
I don't understand you.
First, you... Feb 5 2011, 11:40 sauvage78 QUOTE you put doubts on how much it has improved s... Feb 5 2011, 13:28 jmvalin If you want to see how far CELT has come, there... Feb 5 2011, 15:18 list any future improve towards 32kbps range? Feb 6 2011, 19:25 jmvalin QUOTE (list @ Feb 6 2011, 13:25) any futu... Feb 7 2011, 04:00 list I found some samples in which @64 kbps,48 khz , CE... Feb 7 2011, 12:52 jmvalin QUOTE (list @ Feb 7 2011, 06:52) I found ... Feb 7 2011, 13:03 NullC QUOTE (jmvalin @ Feb 7 2011, 04:03) QUOTE... Feb 7 2011, 16:30 IgorC I have a job to do until 10th of March. After that... Feb 9 2011, 10:26 IgorC Very short test on difficult eig sample
Big surp... Feb 13 2011, 21:09 IgorC Single result for one random sample.
Test of scala... Feb 13 2011, 23:37 IgorC The first sample that wasn't transparent at 19... Feb 14 2011, 16:32 IgorC CELT performs not enough well and worse than Vorbi... Feb 14 2011, 22:21 IgorC ~67 kbps test:
CELT 0.11.2 (complexity 10, bitrate... Mar 15 2011, 16:02 NullC QUOTE (IgorC @ Mar 15 2011, 07:02) ~67 kb... Mar 16 2011, 13:27 LaserSokrates Hey jmvalin, thank you and the team behind CELT fo... Mar 16 2011, 14:27 Anakunda Hello there, tried to compile celtenc with library... Jun 2 2011, 14:35 2304p QUOTE (Anakunda @ Jun 2 2011, 15:35) Hell... Jun 3 2011, 07:16 Anakunda Thanks much, that's work. I'd be intereste... Jun 3 2011, 07:26 klonuo You can get 0.11.2 also from here: http://listenin... Jun 3 2011, 08:01 lvqcl version 0.11.4 available at http://git.xiph.org/?... Jun 3 2011, 10:43 klonuo QUOTE (lvqcl @ Jun 3 2011, 11:43) version... Jun 3 2011, 11:35 2304p QUOTE (lvqcl @ Jun 3 2011, 11:43) version... Jun 4 2011, 15:09 klonuo QUOTE (2304p @ Jun 4 2011, 16:09) I have ... Jun 4 2011, 19:37 2304p QUOTE (klonuo @ Jun 4 2011, 20:37) QUOTE ... Jun 4 2011, 22:42 Anakunda celt.c violates the C standard several times in th... Jun 3 2011, 11:45 lvqcl QUOTE (Anakunda @ Jun 3 2011, 14:45) celt... Jun 3 2011, 11:57 Anakunda QUOTE (lvqcl @ Jun 3 2011, 12:57) QUOTE (... Jun 3 2011, 12:09 lvqcl Either I cannot compile CELT 0.11.4 correctly, or ... Jun 4 2011, 16:28 klonuo run automation bash script provided and then as re... Jun 4 2011, 23:03 2304p can you compile celt-0.11.4.tar.gz and upload as c... Jun 5 2011, 12:46 Anakunda I can compile but for me it doesnot encode anythin... Jun 5 2011, 13:38 lvqcl Celt 2011-04-21:
(re-uploaded: compiled with CUS... Jun 5 2011, 16:38 2304p QUOTE (lvqcl @ Jun 5 2011, 17:38) Celt 20... Jun 5 2011, 17:59 darkbyte Hi!
First, thanks for this truly amazing code... Nov 13 2011, 10:00 NullC QUOTE (darkbyte @ Nov 13 2011, 02:00) I... Nov 14 2011, 09:23 darkbyte QUOTE (NullC @ Nov 14 2011, 10:23) For fi... Nov 14 2011, 17:57 Gainless Can someone re-compile the celt version 0.11.4 to ... Dec 12 2011, 22:37 |
|
Lo-Fi Version | Time is now: 26th May 2013 - 03:00 |
