Audio Quality Evaluation

Topic: Audio Quality Evaluation (Read 4239 times) previous topic - next topic

0 Members and 1 Guest are viewing this topic.

Audio Quality Evaluation

2002-10-16 16:38:29

hi people

As far as i know only a few programs based on PEAQ BS 1387 do exist (OPERA, EAQUAL...let me know if there are others..) . Concerned about objective audio quality assessment i would like to know if others programs, based upon differents standards not necessary coming from the ITU, are available? If so what do you think of them and of objective assessment in the field of audio coding?

Audio Quality Evaluation

Reply #1 – 2002-10-16 16:45:52

The problem with these tools is that they are based on a psymodel themselves and their accuracy stands and falls with the accuracy of that psymodel. Using them to judge high end codecs for example is quite flawed, as the psymodels in those codecs tend to be more accurate than the ones in the tools.

They can never come close to being a substitute for good subjective testing.

Audio Quality Evaluation

Reply #2 – 2002-10-16 23:10:26

So it is like using a foot rule in order to know if foot rules are accurate ?

Audio Quality Evaluation

Reply #3 – 2002-10-17 08:50:58

actually i don't want to substitute subjective assessment with objective tests. Objective assessment should be a complementary way of assessment in order to be able to do a global assessment of audio material

Audio Quality Evaluation

Reply #4 – 2002-10-17 09:15:06

Quote

So it is like using a foot rule in order to know if foot rules are accurate ?

Yup. It works well if you checking the accuracy of a bunch of foot rules which have a high length variance, but it doesn't work well if you you're checking the accuracy of bunch of foot rules which differ very little.

Audio Quality Evaluation

Reply #5 – 2002-10-17 13:36:12

Quote

actually i don't want to substitute subjective assessment with objective tests. Objective assessment should be a complementary way of assessment in order to be able to do a global assessment of audio material

I don't know if you've already read "MP3 and AAC explained" from Karlheinz Brandenburg (see the Wiki on Audiocoding.com), but he mentions PEAQ in this paper (pages 8-9) and cites other important sources in his references like [8]. Maybe this document is also available online, I don't know (but Google would).

Edit: Sorry, I meant reference [4] of course...

C. Colomes, C. Schmidmer and W.C. Treurniet. Perceptual-quality assessment for digital audio: PEAQ - the proposed ITU standard for objective measurements of perceived audio quality. (in: Proceedings of the AES 17th International Conference, 1999)

Alright, a short abstract of the new 2000 version of this document can be found via http://www.peaq.org/prod02.htm, but not a complete version of course, because that would have to be bought from the AES (Audio Engineering Society).

Audio Quality Evaluation

Reply #6 – 2002-10-17 15:06:29

Available at mp3-tech.org

Audio Quality Evaluation

Reply #7 – 2002-10-17 16:23:54

Quote

Available at mp3-tech.org

But where?

Audio Quality Evaluation

Reply #8 – 2002-10-17 16:31:42

In the programmer's corner. There are many papers there...

Audio Quality Evaluation

Reply #9 – 2002-10-17 16:42:39

Quote

In the programmer's corner. There are many papers there...

Great site, thank you, I bookmarked it. But I still cannot find the document from C. Colomes and others: "Perceptual-quality assessment..." or G.A. Soulodre and others: "Subjective evaluation..."

Notice