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Public AAC Listening Test @ ~96 kbps [July 2011]: Results, Results and post-test discussion
IgorC
post Aug 23 2011, 19:56
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After the long time of preparations, discussions and realization of the test the results are finally here.

http://listening-tests.hydrogenaudio.org/i...-a/results.html

Summary: Apple won, FhG is the second, Coding Technologies is the third and Nero is the last

I appreciate all people who has supported the test and participated in it.

This post has been edited by IgorC: Aug 23 2011, 20:12
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benski
post Aug 23 2011, 20:18
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It would be interesting to do a rank-sum analysis comparing each pair of encoders. Although the numeric values assigned by the listener seem like legitimate statistical data, the only real value is whether or not a listener ranked one encoder higher or lower than another.
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C.R.Helmrich
post Aug 23 2011, 20:42
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QUOTE (benski @ Aug 23 2011, 21:18) *
... whether or not a listener ranked one encoder higher or lower than another.

I thought that (Garf, correct me if necessary) this information is reflected in the p-value tables and whether or not the confidence intervals of two coders overlap.

Interesting results. I guess I have to add Sample20 to my standard test set at work...

Chris


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Garf
post Aug 23 2011, 20:47
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QUOTE (C.R.Helmrich @ Aug 23 2011, 21:42) *
QUOTE (benski @ Aug 23 2011, 21:18) *
... whether or not a listener ranked one encoder higher or lower than another.

I thought that (Garf, correct me if necessary) this information is reflected in the p-value tables and whether or not the confidence intervals of two coders overlap.


Yes (aggregate over all listeners). Note that the graphics are simplified plots, and don't have the correct confidence intervals for the bootstrap (because the tool doesn't support generating them) nor for ANOVA (IIRC, the plots don't consider the blocking).

This is why you'll see overlap in the graphics but not in the bootstrap nor blocked ANOVA results.

Basically, the graphics suck, but they look cute wink.gif

This post has been edited by Garf: Aug 23 2011, 20:49
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lvqcl
post Aug 27 2011, 20:22
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QUOTE (Garf @ Aug 23 2011, 23:47) *
Basically, the graphics suck, but they look cute wink.gif

Exactly. So, the graphs: tongue.gif

Ratings for all 20 samples: (without low anchor)




Sorted by Nero rating:




Without Nero, sorted by CT rating:




CVBR, TVBR and FhG, sorted by FhG rating:




All encoders, sorted by their ratings independently(!):

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no404error
post Sep 4 2011, 04:01
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QUOTE (lvqcl @ Aug 27 2011, 22:22) *
CVBR, TVBR and FhG, sorted by FhG rating:


Thanks!

C.R.Helmrich
Congratulations! FhG - the best AAC codec for audiobooks smile.gif
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Posts in this topic
- IgorC   Public AAC Listening Test @ ~96 kbps [July 2011]: Results   Aug 23 2011, 19:56
- - benski   It would be interesting to do a rank-sum analysis ...   Aug 23 2011, 20:18
|- - Garf   QUOTE (benski @ Aug 23 2011, 21:18) It wo...   Aug 23 2011, 20:27
||- - benski   QUOTE (Garf @ Aug 23 2011, 15:27) QUOTE (...   Aug 23 2011, 20:54
||- - Garf   QUOTE (benski @ Aug 23 2011, 21:54) The F...   Aug 23 2011, 21:11
|- - C.R.Helmrich   QUOTE (benski @ Aug 23 2011, 21:18) ... w...   Aug 23 2011, 20:42
||- - Garf   QUOTE (C.R.Helmrich @ Aug 23 2011, 21:42)...   Aug 23 2011, 20:47
|||- - lvqcl   QUOTE (Garf @ Aug 23 2011, 23:47) Basical...   Aug 27 2011, 20:22
|||- - no404error   QUOTE (lvqcl @ Aug 27 2011, 22:22) CVBR, ...   Sep 4 2011, 04:01
||- - benski   QUOTE (C.R.Helmrich @ Aug 23 2011, 15:42)...   Aug 23 2011, 20:52
|- - IgorC   QUOTE (benski @ Aug 23 2011, 16:18) It wo...   Aug 23 2011, 21:01
|- - benski   QUOTE (IgorC @ Aug 23 2011, 16:01) QUOTE ...   Aug 23 2011, 21:07
|- - IgorC   QUOTE (benski @ Aug 23 2011, 17:07) Actua...   Aug 23 2011, 21:11
- - IgorC   I should also mention that I've participated i...   Aug 23 2011, 21:30
- - zima   Maybe there could be a legend for X-axis, the abbr...   Aug 23 2011, 21:37
- - lvqcl   It is interesting that QT tvbr and cvbr encoded fi...   Aug 23 2011, 22:05
- - IgorC   zima, will fix it later. QUOTE (lvqcl @ Au...   Aug 23 2011, 22:11
- - Alexxander   Thanks to all who participated in this test and to...   Aug 23 2011, 22:31
|- - Garf   QUOTE (Alexxander @ Aug 23 2011, 23:31) I...   Aug 23 2011, 23:02
- - Dakeryas   Many thanks for the test ! Interesting to not...   Aug 23 2011, 23:11
- - IgorC   I've noticed that previous version of Nero 1.0...   Aug 23 2011, 23:51
- - Gornot   To be perfectly honest, I am surprised that FhG di...   Aug 24 2011, 00:29
- - /mnt   Interesting results, I gotta see if the pre-echo h...   Aug 24 2011, 01:23
- - kennedyb4   If it is fair to say that many of the samples were...   Aug 24 2011, 01:42
- - Sebastian Mares   It appears to me that the low anchor was way too b...   Aug 24 2011, 07:29
|- - Garf   QUOTE (Sebastian Mares @ Aug 24 2011, 08...   Aug 24 2011, 09:35
|- - Nezmer   QUOTE (Garf @ Aug 24 2011, 10:35) Probabl...   Aug 24 2011, 11:35
|- - Garf   QUOTE (Nezmer @ Aug 24 2011, 12:35) QUOTE...   Aug 24 2011, 12:46
|- - Nezmer   QUOTE (Garf @ Aug 24 2011, 13:46) QUOTE (...   Aug 24 2011, 18:26
- - greynol   I was wondering the same thing.   Aug 24 2011, 07:49
- - C.R.Helmrich   Some bit-rate statistics which were presented in p...   Aug 24 2011, 18:27
|- - Garf   QUOTE (C.R.Helmrich @ Aug 24 2011, 19:27)...   Aug 25 2011, 07:29
- - Zarggg   Just looking for a quick verification on whether I...   Aug 25 2011, 18:06
|- - IgorC   QUOTE (Zarggg @ Aug 25 2011, 14:06) Am I ...   Aug 25 2011, 18:28
- - greynol   CVBR and TVBR are statistically tied. One did not...   Aug 25 2011, 18:12
|- - Zarggg   QUOTE (greynol @ Aug 25 2011, 13:12) CVBR...   Aug 25 2011, 22:47
|- - Garf   QUOTE (greynol @ Aug 25 2011, 19:12) CVBR...   Aug 26 2011, 07:20
- - greynol   That assumes facts not in evidence.   Aug 25 2011, 19:04
- - Gecko   First, thank you IgorC and everyone involved! ...   Aug 25 2011, 20:24
|- - IgorC   QUOTE (Gecko @ Aug 25 2011, 16:24) First,...   Aug 26 2011, 03:30
||- - mjb2006   QUOTE (IgorC @ Aug 25 2011, 20:30) I do n...   Aug 26 2011, 05:18
||- - IgorC   QUOTE (mjb2006 @ Aug 26 2011, 01:18) Anyw...   Aug 26 2011, 05:24
|- - Garf   QUOTE (Gecko @ Aug 25 2011, 21:24) a) Do ...   Aug 26 2011, 07:16
|- - IgorC   QUOTE (Garf @ Aug 26 2011, 03:16) Always ...   Aug 26 2011, 08:51
- - mjb2006   Even though I sent in results, they didn't get...   Aug 25 2011, 22:50
- - Gecko   Thank you IgorC and Garf for answering my question...   Aug 26 2011, 10:28
|- - IgorC   QUOTE (Gecko @ Aug 26 2011, 06:28) Given ...   Aug 26 2011, 11:20
||- - Garf   QUOTE (IgorC @ Aug 26 2011, 12:20) QUOTE ...   Aug 27 2011, 17:48
|- - Garf   QUOTE (Gecko @ Aug 26 2011, 11:28) In the...   Aug 27 2011, 17:39
- - IgorC   I found the first and the last graphs to be partic...   Aug 27 2011, 21:46
|- - lvqcl   QUOTE (IgorC @ Aug 28 2011, 00:46) I thin...   Aug 27 2011, 22:20
- - IgorC   Yeah   Aug 27 2011, 22:39
- - IgorC   BTW if someone want to organize the next public te...   Oct 1 2011, 20:21
- - jukkap   How about 48kbps HE AAC ? Or low bitrate multiform...   Oct 1 2011, 20:49
|- - IgorC   QUOTE (jukkap @ Oct 1 2011, 16:49) How ab...   Oct 10 2011, 23:17
|- - jukkap   QUOTE (IgorC @ Oct 10 2011, 23:17) The la...   Oct 20 2011, 10:04
- - IgorC   Well, the last time we have tested LC-AAC encoders...   Oct 1 2011, 21:58
- - jukkap   QUOTE (IgorC @ Oct 1 2011, 22:58) Can You...   Oct 2 2011, 05:10
- - IgorC   Late but still here. Some participants have answ...   Oct 23 2011, 07:14


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