Re: Listening Tests (=?iso-8859-1?Q?S=F8ren_Bech?= )

Subject: Re: Listening Tests
From:    =?iso-8859-1?Q?S=F8ren_Bech?=  <SBE(at)BANG-OLUFSEN.DK>
Date:    Tue, 25 Feb 2003 22:07:32 +0100

Hi again The goal in watermarking and low bit-rate codecs is the same: the coded version should be indistinguishable from the original. If you check the ITU cite you will find that ITU at the moment allows for free downloads of three standard so try and get the BS.1116 - It will answer all (I guess : -)) of your questions on procedure, experimental set-up, analysis of the results etc. You should be aware that this type of test where you have quite small perceptual differences are very difficult to conduct if you want reliable results - so my best advise is to check the standard - it has been used for all the published results in e.g. JAES - you could check that Journal too. Best from Soren Lawrence Miranda <lawrence.miranda To: AUDITORY(at)LISTS.MCGILL.CA (at)UP.EDU.PH> cc: Sent by: AUDITORY Subject: Re: Listening Tests Research in Auditory Perception <AUDITORY(at)LISTS.M CGILL.CA> 26-02-2003 13:36 Please respond to Lawrence Miranda The goal in audio watermarking is that the listener should not distinguish any difference between the original audio from the watermarked one. Now to test this, I mean, should a same-different test do? Are there other tests more suitable and generously documented and has its free gui implementation? I don't have ITU access. Thanks. Lawrence Miranda ----- Original Message ----- From: "Søren Bech" <SBE(at)> To: "Lawrence Miranda" <lawrence.miranda(at)UP.EDU.PH>; <AUDITORY(at)LISTS.MCGILL.CA> Sent: Tuesday, February 25, 2003 11:10 AM Subject: Re: Listening Tests > > A good source to begin with is the ITU-R recommendation BS.1116 - This > standard was developed for listening tests on low bit-rate codecs with > small impairments. I don't know what type and magnitude of impairments you > are planning to examine but if they are larger there is another ITU-R > standard (not accepted yet) for that: BS.[DOC.6/106(rev.1)-E](1534) > > You can obtain these docs at the ITU web page > ( %20on%20paper) > > Hope this helps > > Best from > Soren > > Dear List, > What are the proper/most accurate listening tests to test the audibility of > a watermaked audio signal? I would greatly appreciate any links to > resources/papers/tutorials/matlab codes for gui/source codes to conduct > the > listening tests.

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