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General discussion of future public test
IgorC
post Dec 21 2011, 16:28
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Hello,
Now when itís sure that Apple encoder represents AAC standard very well the next step will be a public multiformat test.
No particular date or plan. Itís a general discussion with the purpose to hear the opinions, points of view, suggestions.

Items to talk about (these numbers are first approximations):
1.The number of codecs: 4+low anchor. 4 is affordable number for one test.
2.The selection of codecs (basing on curret previous votes):
http://listening-test.blogspot.com/2011/06...reparation.html

Apple LC-AAC - the most optimal AAC encoder. (Well, though FhG was quite good too).
MP3 LAME Ė 10 votes
Vorbis AoTuV Ė 8.5 votes.
Opus/CELT Ė 6 votes. (still no info when there will be Opus 1.0)

Itís possible to change your votes.

(?) USAC (working name of future AACís successor ). No information about future availability of it.
(?) low anchor
(?) Settings, versions, etc.

3. Bitrate:
VBR 96 kbps. The last AAC public test was at 96 kbps (well, it was actually 100 kbps).
Also I think it will be more interesting to compare MP3 128-135 kbps and AAC/AoTuV 96-100 kbps. Probably a lot of people are interesting to trade off between compability/compression efficiency smile.gif

4. Samples.
Last time we have applied the technic of random selection of the samples. 20 samples.

The developers are very welcome to participate in this topic.

This test should be more interesting as it will include interesting (for use) codecs. biggrin.gif
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halb27
post Dec 23 2011, 16:37
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The fact that Lame resamples to 32 kHz at 96 kbps shouldn't worry too much IMO. Maybe the lack of HF is easily noticeable, but at 96 kbps there is worse to be frightened of for mp3. Lacking the extreme frequency range doesn't really hurt much though it's often audible.

Whether it's useful that mp3 participates in a 96 kbps test is a question of sample selection. With problem samples, especially pre-echo stuff, mp3 won't have a chance, and participance of mp3 doesn't make sense.
So if mp3 should participate we'd better use only regular music, best chosen by chance.

On the other hand I wouldn't mind if we forget about mp3 at 96 kbps. It's really no candidate for the winner here.

This post has been edited by halb27: Dec 23 2011, 16:39


--------------------
lame3100m -V1 --insane-factor 0.75
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Posts in this topic
- IgorC   General discussion of future public test   Dec 21 2011, 16:28
- - Steve Forte Rio   Nice... QUOTE Itís possible to change your votes....   Dec 22 2011, 16:45
- - IgorC   Good. Guys, propose the codecs you are intereste...   Dec 22 2011, 17:03
- - IgorC   There is a first issue if MP3 will be tested at 96...   Dec 22 2011, 20:17
|- - NullC   QUOTE (IgorC @ Dec 22 2011, 12:17) There ...   Dec 22 2011, 21:44
|- - Nick.C   QUOTE (IgorC @ Dec 22 2011, 19:17) Possib...   Dec 22 2011, 22:34
- - lvqcl   8.5 votes? then: +1 for AAC +1 for Vorbis +0.5...   Dec 22 2011, 20:37
- - Kohlrabi   I'd like to see how Opus will perform here, so...   Dec 22 2011, 21:10
- - IgorC   Not all cards support automatic switching between ...   Dec 23 2011, 14:16
- - halb27   The fact that Lame resamples to 32 kHz at 96 kbps ...   Dec 23 2011, 16:37
|- - nu774   QUOTE (halb27 @ Dec 24 2011, 00:37) The f...   Dec 23 2011, 17:24
- - IgorC   Also this time I will be glad to be just a listene...   Dec 24 2011, 00:53
- - IgorC   Some feedback was received on #Hydrogenaudio and ...   Dec 25 2011, 18:18
- - Yaztromo   +1 QT AAC +1 Vorbis (Aotuv b603?) +1 LAME 3.99 +0....   Dec 26 2011, 02:33
- - Gecko   +1 for keeping the number of codecs small. Conside...   Dec 26 2011, 12:43
- - IgorC   Very low quality low anchor permits to analyse the...   Dec 26 2011, 14:10
|- - knik   How about FAAC, I think it could be good as anchor...   Mar 2 2012, 10:44
- - Kohlrabi   Any chance to see Musepack competing against curre...   Mar 2 2012, 12:41
- - jensend   USAC has been "released" with the confus...   Mar 3 2012, 08:06
|- - knik   QUOTE Anybody who thinks that MP3 should only be t...   Mar 3 2012, 09:50
- - Pretentiousman   +1 Apple LC-AAC +1 MP3 LAME @ 128-135 kbps +1 Vorb...   Mar 7 2012, 22:03
- - Gainless   I think it would be a good idea to make another AA...   Aug 9 2012, 14:14
- - Garf   QUOTE (Gainless @ Aug 9 2012, 15:14) I th...   Aug 9 2012, 16:09
|- - jensend   QUOTE (Garf @ Aug 9 2012, 09:09) Ideally ...   Aug 10 2012, 04:09
- - IgorC   QUOTE (Gainless @ Aug 9 2012, 10:14) I th...   Aug 16 2012, 14:48


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