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Multiformat listening test @ ~64kbps: Results, Results and post-test discussion
IgorC
post Apr 12 2011, 00:40
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The test is finished, results are available here:

http://listening-tests.hydrogenaudio.org/igorc/results.html

Summary: CELT/Opus won, Apple HE-AAC is better than Nero HE-AAC, and Vorbis has caught up with Nero HE-AAC.
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Alex B
post Apr 12 2011, 12:59
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Thanks guys! Interesting results.


One note though:

CODE
Read 5 treatments, 531 samples => 10 comparisons
    Means:
          Vorbis   Nero_HE-AAC  Apple_HE-AAC          Opus    AAC-LC@48k
           3.513         3.547         3.817         3.999         1.656


For processing the result .txt files with chunky I organized them to sample folders. I removed the results that were marked "invalid" and results that apparently had a fixed newer version (marked as such). I had a duplicate problem with romor's results (a couple of duplicates in a subfolder), but I decided to keep the newer result files. I got 566 remaining result files. Assuming I did not make lots of mistakes, I wonder what can cause the difference. Did you disqualify more results after creating the rar package or does "531 samples" mean something else than the total number of result files?

Here's how chunky parses the 566 result files I have:

CODE
% Result file produced by chunky-0.8.4-beta
% ..\chunky.exe --codec-file=..\codecs.txt -n --ratings=results --warn -p 0.05
%
% Sample Averages:

Vorbis    Nero    Apple    CELT    Anchor
2.56    4.28    4.19    2.67    1.87
2.95    4.20    4.03    2.36    1.68
3.42    3.51    3.98    4.73    2.51
4.12    3.84    4.49    4.64    2.18
4.18    3.59    3.87    4.52    1.95
3.35    3.68    3.34    4.00    1.56
3.86    2.98    2.96    3.50    1.85
4.03    3.78    4.09    4.49    2.02
3.60    3.71    3.89    3.94    1.51
4.28    2.78    2.19    4.12    1.44
4.12    3.93    4.17    4.39    1.70
3.25    3.18    3.20    4.14    1.77
3.83    3.63    3.86    4.56    1.41
3.49    3.81    4.01    4.27    1.37
4.15    3.84    4.08    4.76    2.04
3.97    2.74    3.09    4.38    1.74
3.35    3.24    4.15    4.44    1.56
2.68    2.96    3.63    4.10    1.51
3.58    4.37    4.88    3.73    1.76
3.40    4.10    4.68    4.26    1.61
3.80    3.49    3.55    4.43    1.38
3.81    3.30    4.27    4.26    1.13
3.59    3.14    3.51    4.09    1.18
3.29    3.61    3.88    4.16    1.36
3.66    3.84    4.37    3.86    1.55
2.78    3.99    4.18    2.82    1.57
3.62    3.88    3.92    3.93    1.34
3.39    4.03    4.39    3.96    1.46
3.61    4.12    4.36    4.09    1.54
4.42    3.48    4.29    4.68    1.82

% Codec averages:
% 3.60    3.63    3.92    4.08    1.65


--------------------
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NullC
post Apr 12 2011, 14:48
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QUOTE
For processing the result .txt files with chunky I organized them to sample folders. I removed the results that were marked "invalid" and results that apparently had a fixed newer version (marked as such). I
had a duplicate problem with romor's results (a couple of duplicates in a subfolder), but I decided to keep the newer result files. I got 566 remaining result files. Assuming I did not make lots of mistakes, I
wonder what can cause the difference. Did you disqualify more results after creating the rar package or does "531 samples" mean something else than the total number of result files?


Sounds like you didn't eliminate the listeners with more than 4 invalid results.

The filtering rules on the page are:

* If the listener ranked the reference worse than 4.5 on a sample, the listener's results for that sample were discarded.
* If the listener ranked the low anchor at 5.0 on a sample, the listener's results for that sample were discarded.
* If the listener ranked the reference below 5.0 on more than 4 samples, all of that listener's results were discarded.

You'll have to modify chunky to get the that behavior.


This post has been edited by NullC: Apr 12 2011, 15:12
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Posts in this topic
- IgorC   Multiformat listening test @ ~64kbps: Results   Apr 12 2011, 00:40
- - Garf   If someone can assist with a bitrate table or per-...   Apr 12 2011, 01:02
- - Garf   Oh, and given that Opus is open sourced, if one of...   Apr 12 2011, 01:06
- - AllanP   I just wonder one thing, when the Vorbis encoder w...   Apr 12 2011, 01:14
|- - Garf   QUOTE (AllanP @ Apr 12 2011, 02:14) I jus...   Apr 12 2011, 01:15
|- - AllanP   QUOTE (Garf @ Apr 12 2011, 02:15) You can...   Apr 12 2011, 01:22
- - romor   Congratulation to CELT/Opus! I wanted to com...   Apr 12 2011, 03:08
- - IgorC   I think the results of lessthanjoey and AlexB are ...   Apr 12 2011, 03:50
- - googlebot   I'm stunned by the CELT/Opus results! I wo...   Apr 12 2011, 08:06
|- - NullC   QUOTE (googlebot @ Apr 11 2011, 23:06) I...   Apr 14 2011, 05:00
|- - saratoga   QUOTE (NullC @ Apr 14 2011, 00:00) We als...   Apr 14 2011, 06:29
||- - NullC   QUOTE (saratoga @ Apr 13 2011, 22:29) Is ...   Apr 14 2011, 08:30
|- - Garf   QUOTE (NullC @ Apr 14 2011, 06:00) Low-la...   Apr 14 2011, 12:19
|- - jmvalin   QUOTE (Garf @ Apr 14 2011, 07:19) Is the ...   Apr 14 2011, 14:04
|- - NullC   QUOTE (Garf @ Apr 14 2011, 03:19) QUOTE (...   Apr 14 2011, 17:47
|- - C.R.Helmrich   QUOTE (NullC @ Apr 14 2011, 18:47) The sw...   Apr 14 2011, 23:39
|- - jmvalin   QUOTE (C.R.Helmrich @ Apr 14 2011, 18:39)...   Apr 15 2011, 05:49
- - Alex B   Thanks guys! Interesting results. One note t...   Apr 12 2011, 12:59
|- - Garf   QUOTE (Alex B @ Apr 12 2011, 13:59) I got...   Apr 12 2011, 13:53
|- - NullC   QUOTE For processing the result .txt files with ch...   Apr 12 2011, 14:48
|- - Garf   QUOTE (NullC @ Apr 12 2011, 15:48) Sounds...   Apr 12 2011, 14:59
||- - Alex B   QUOTE (Garf @ Apr 12 2011, 16:59) But the...   Apr 12 2011, 15:09
|- - Alex B   QUOTE (NullC @ Apr 12 2011, 16:48) Sounds...   Apr 12 2011, 15:02
|- - NullC   QUOTE (Alex B @ Apr 12 2011, 07:02) QUOTE...   Apr 12 2011, 15:17
|- - motion_blur   QUOTE (Alex B @ Apr 12 2011, 16:02) QUOTE...   Apr 12 2011, 16:15
|- - NullC   QUOTE (motion_blur @ Apr 12 2011, 08:15) ...   Apr 12 2011, 17:54
|- - motion_blur   QUOTE (NullC @ Apr 12 2011, 18:54) QUOTE ...   Apr 12 2011, 19:42
- - Alex B   For comparison I uploaded a rar package of my ...   Apr 12 2011, 14:14
|- - Garf   QUOTE (Alex B @ Apr 12 2011, 15:14) For c...   Apr 12 2011, 14:49
- - Alex B   QUOTE (Garf @ Apr 12 2011, 16:59) But the...   Apr 12 2011, 15:35
|- - Garf   QUOTE (Alex B @ Apr 12 2011, 16:35) QUOTE...   Apr 12 2011, 15:42
- - Alex B   Regarding the bitrate table, I guess that CELT/Op...   Apr 12 2011, 16:14
|- - NullC   QUOTE (Alex B @ Apr 12 2011, 08:14) Regar...   Apr 12 2011, 18:10
- - IgorC   Yes, I was too strict. Sorry about it. Some of th...   Apr 12 2011, 18:13
|- - motion_blur   QUOTE (IgorC @ Apr 12 2011, 19:13) Yes, I...   Apr 12 2011, 20:09
|- - NullC   QUOTE (motion_blur @ Apr 12 2011, 12:09) ...   Apr 13 2011, 00:59
|- - motion_blur   QUOTE (NullC @ Apr 13 2011, 01:59) QUOTE ...   Apr 13 2011, 10:06
- - markanini   I figured ratings would vary between testers depen...   Apr 12 2011, 18:52
|- - NullC   QUOTE (markanini @ Apr 12 2011, 09:52) I ...   Apr 12 2011, 20:57
- - lessthanjoey   I've done some more testing with headphones af...   Apr 12 2011, 19:51
- - C.R.Helmrich   Thanks for organizing the tests, guys! Sorry f...   Apr 12 2011, 20:11
|- - motion_blur   QUOTE (C.R.Helmrich @ Apr 12 2011, 21:11)...   Apr 12 2011, 20:41
|- - Garf   QUOTE Please provide the number of valid results (...   Apr 12 2011, 21:44
||- - C.R.Helmrich   Sorry, Christoph, can't reproduce it. What you...   Apr 12 2011, 22:12
||- - Garf   QUOTE (C.R.Helmrich @ Apr 12 2011, 23:12)...   Apr 12 2011, 23:37
||- - motion_blur   QUOTE (C.R.Helmrich @ Apr 12 2011, 23:12)...   Apr 13 2011, 00:41
|- - NullC   QUOTE (C.R.Helmrich @ Apr 12 2011, 11:11)...   Apr 12 2011, 21:47
- - IgorC   motion_blur, You can download the results of all...   Apr 12 2011, 20:21
|- - _mē_   Some presentation suggestions: 1. Codec versions a...   Apr 12 2011, 20:43
|- - IgorC   QUOTE (_mē_ @ Apr 12 2011, 16:43) Some pr...   Apr 12 2011, 20:46
|- - Alex B   QUOTE (_mē_ @ Apr 12 2011, 22:43) 2. Link...   Apr 12 2011, 21:06
||- - Alex B   QUOTE (Alex B @ Apr 12 2011, 23:06) QUOTE...   Apr 13 2011, 11:38
||- - NullC   QUOTE (Alex B @ Apr 13 2011, 02:38) The b...   Apr 13 2011, 12:41
||- - Garf   QUOTE (NullC @ Apr 13 2011, 13:41) QUOTE ...   Apr 13 2011, 12:54
||- - Alex B   QUOTE (NullC @ Apr 13 2011, 14:41) Any id...   Apr 13 2011, 14:46
||- - NullC   QUOTE (Alex B @ Apr 13 2011, 05:46) QUOTE...   Apr 13 2011, 22:48
|- - Garf   QUOTE (_mē_ @ Apr 12 2011, 21:43) Some pr...   Apr 12 2011, 22:24
- - Alex B   Here is the raw data for a bitrate table. The bitr...   Apr 12 2011, 20:30
- - IgorC   Thank you for your help, AlexB. If you can do the ...   Apr 12 2011, 20:44
- - C.R.Helmrich   Christoph, do you mean the slightly washed out bas...   Apr 12 2011, 20:52
|- - motion_blur   QUOTE (C.R.Helmrich @ Apr 12 2011, 21:52)...   Apr 12 2011, 21:11
|- - C.R.Helmrich   QUOTE (motion_blur @ Apr 12 2011, 22:11) ...   Apr 12 2011, 21:38
|- - motion_blur   QUOTE (C.R.Helmrich @ Apr 12 2011, 22:38)...   Apr 12 2011, 21:56
- - IgorC   I've checked. The decoder on Christoph's s...   Apr 12 2011, 20:54
- - Alex B   Here's the bitrate table: In Excel format: ...   Apr 12 2011, 22:20
|- - saintdev   QUOTE (Alex B @ Apr 12 2011, 14:20) Here...   Apr 12 2011, 23:21
- - NullC   QUOTE (IgorC @ Apr 11 2011, 16:40) The te...   Apr 13 2011, 04:42
|- - Garf   QUOTE (NullC @ Apr 13 2011, 05:42) Hey al...   Apr 13 2011, 08:27
||- - IgorC   QUOTE (Garf @ Apr 13 2011, 04:27) One thi...   Apr 14 2011, 05:57
|- - C.R.Helmrich   Thanks, Garf, for the plot! And thanks, Christ...   Apr 13 2011, 22:46
|- - Garf   QUOTE (C.R.Helmrich @ Apr 13 2011, 23:46)...   Apr 13 2011, 22:57
||- - C.R.Helmrich   QUOTE (Garf @ Apr 13 2011, 23:57) From th...   Apr 13 2011, 23:06
|- - jmvalin   QUOTE (C.R.Helmrich @ Apr 13 2011, 17:46)...   Apr 14 2011, 00:58
|- - Garf   QUOTE (jmvalin @ Apr 14 2011, 01:58) I do...   Apr 14 2011, 09:13
|- - jmvalin   QUOTE (Garf @ Apr 14 2011, 04:13) You are...   Apr 14 2011, 11:41
- - Garf   The result page is now updated with per-sample gra...   Apr 13 2011, 12:41
- - mixminus1   Thanks much to all for their work in both setting ...   Apr 13 2011, 14:55
|- - Garf   QUOTE (mixminus1 @ Apr 13 2011, 15:55) Th...   Apr 13 2011, 15:04
- - mixminus1   :facepalm: Good God... Thanks, Garf, I was scour...   Apr 13 2011, 15:15
- - romor   @Garf: can you please reupload results you posted ...   Apr 13 2011, 16:35
|- - Garf   QUOTE (romor @ Apr 13 2011, 17:35) @Garf:...   Apr 13 2011, 18:59
- - IgorC   AlexB, thank you for bitrate verification. I real...   Apr 13 2011, 17:12
- - pdq   Whether or not classical should be considered to b...   Apr 13 2011, 17:51
|- - IgorC   QUOTE (pdq @ Apr 13 2011, 13:51) Whether ...   Apr 13 2011, 18:01
|- - pdq   QUOTE (IgorC @ Apr 13 2011, 13:01) QUOTE ...   Apr 13 2011, 18:53
- - romor   file: http://people.xiph.org/~greg/opus/ha2011/2.....   Apr 13 2011, 19:28
|- - NullC   QUOTE (romor @ Apr 13 2011, 10:28) file: ...   Apr 13 2011, 19:53
- - IgorC   Bitrate verification on my set of albums: http:/...   Apr 13 2011, 21:45
|- - NullC   QUOTE (IgorC @ Apr 13 2011, 13:45) Bitrat...   Apr 21 2011, 19:15
|- - jmvalin   QUOTE (NullC @ Apr 21 2011, 14:15) QUOTE ...   Apr 21 2011, 19:53
- - Garf   QUOTE Has anyone ever seriously blind-tested e.g. ...   Apr 14 2011, 00:10
|- - C.R.Helmrich   QUOTE (Garf @ Apr 14 2011, 01:10) I'm...   Apr 14 2011, 10:46
- - .alexander.   The second graph seems to be consistent with ...   Apr 15 2011, 12:40
|- - jmvalin   QUOTE (.alexander. @ Apr 15 2011, 07:40) ...   Apr 15 2011, 15:17
- - Xanikseo   QUOTE (IgorC @ Apr 13 2011, 21:45) Bitrat...   Apr 20 2011, 16:34
|- - Garf   QUOTE (Xanikseo @ Apr 20 2011, 17:34) Igo...   Apr 20 2011, 18:02
|- - IgorC   QUOTE (Xanikseo @ Apr 20 2011, 12:34) Igo...   Apr 20 2011, 18:19
|- - Zarggg   QUOTE (Xanikseo @ Apr 20 2011, 11:34) EDI...   Apr 20 2011, 19:09
- - Xanikseo   QUOTE (Zarggg @ Apr 20 2011, 19:09) QUOTE...   Apr 20 2011, 21:20
- - IgorC   NullC, h*tp://www.mediafire.com/?s7i9usu2qr27pcg ...   Apr 21 2011, 23:52
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