Hello Michael, On one of the Codec 2 blog posts (I think the 1400 bit/s one from Nov 2011) some one ran the Codec thru an objective measure tool to get some pseudo MOS scores.
Subjective testing could be crowd sourced on the web. Neat little project if you are interested. Paired comparison tests are quite easy to conduct. 1. Grab some source files (different speakers, background noise etc) 2. Run them through Codec 2, AMBE, MELP, g729, GSM etc 3. Set up a web page that plays pairs of them in random order. So hts1a might be played using Codec 2 and AMBE one after the other. The next test might be mmt1 with g729 and MELP etc.... 4. The listener then selects which sample of each pair they like best, save the choice to a database. 5. Repeat over as many people who want to hit the web site 6. Publish the rankings, you can even do some statistics, e.g. model the number of times each codec was chosen as a random variable, calculate 95% confidence intervals etc. Cheers, David On Tue, 2012-05-15 at 19:44 +0200, Michael Hartje wrote: > Hi, > > I did not find anything about this, so I ask the list: > > does anybody know of a MOS classification test with the available > different bitrates of the codec2 and if well done and published: where > can I find some results on that subject applied to CODEC2 and a > comparable codec? -- Ok I know: it needs a lot of testing with a lot > of listeners... > > http://en.wikipedia.org/wiki/Mean_opinion_score > http://www.acoustics.hut.fi/publications/files/theses/lemmetty_mst/chap10.html > -- > mit freundlichen Grüßen > > M. Hartje > -- > Prof. Dr.-Ing. Michael Hartje > Labor Hochspannungstechnik / Labor elektrische Messtechnik > Neustadtswall 30; D-28199 Bremen > Tel +49 421 5905-3444 FAX +49 421 5905-3476 > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
