80 kbps LC AAC listening test - Hydrogenaudio Forums

80 kbps LC AAC listening test, Are PNS and IS useful at 80 kbps?

menno View Member Profile	Dec 21 2006, 11:20 Post #1
Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267	Dear All, I would like to announce that the 80 kbps test of upcoming Nero AAC encoder has just started. The purpose of this test is to determine if PNS (Perceptual Noise Substitution) or IS (Intensity Stereo) gives any advantage when used at 80 kbps. With this test, I wish to include true audiophile and scientific community into making the LC-AAC solutions even better in the future. Many thanks in advance for your help! Test runs for 18 days, until January 8th 2007. Which codecs are tested? Following codecs are being tested: - LC-AAC 80 kbps CBR – No PNS no IS - LC-AAC 80 kbps CBR – No PNS, using IS - LC-AAC 80 kbps CBR – No IS, using PNS - LC-AAC 80 kbps CBR – Using both PNS and IS - Hidden codec 1 80 kbps - Hidden codec 2 (high anchor) - Hidden codec 3 (low anchor) How to Test 1. Download http://s4.quicksharing.com/v/5647513/ABC_HR.ZIP.html 2. Extract ABC_HR.ZIP in folder of your choice 3. Read Readme.txt from ABC_HR.ZIP 4. Download samples for the test (links are in ABC_HR.ZIP and in next post), and extract them in the directory where ABC_HR.zip was extracted 5. When you download and extract all the samples, execute the decode_all.bat files from bin folder. This will decode all the files and prepare the test 6. Now everything is ready for the test 7. Open ABC/HR by executing abchr.jar - and, to test each sample, open up the individual .ecf files. Each test set (Sample1, Sample2,…) has an .ecf file for each sample 8. From now on, typical ABC/HR methodology applies, you need to judge the quality of individual files - save the results after you're done, and send the files to me, either by PP or directly to: mbakker (at) nero.com (replace at with @ to get an e-mail address) Links to samples coming in the next post... Happy Testing Here are the samples for the test. Samples from previous Mares and Robertos test at 48 kbps and 128 kbps were chosen. Test with lowest scores on those tests were chosen. This is because even at 48 kbps for many people it was hard to distinguish encoded samples from the original. Also most genres of music are present. http://s19.quicksharing.com/v/9204458/Sample1.zip.html http://s4.quicksharing.com/v/801115/Sample2.zip.html http://s4.quicksharing.com/v/7815217/Sample3.zip.html http://s4.quicksharing.com/v/3713672/Sample4.zip.html http://s4.quicksharing.com/v/5514459/Sample5.zip.html http://s4.quicksharing.com/v/5814487/Sample6.zip.html http://s4.quicksharing.com/v/7761119/Sample7.zip.html http://s4.quicksharing.com/v/3128033/Sample8.zip.html http://s4.quicksharing.com/v/5707785/Sample9.zip.html http://s4.quicksharing.com/v/8088598/Sample10.zip.html http://s4.quicksharing.com/v/6741335/Sample11.zip.html http://s4.quicksharing.com/v/1364761/Sample12.zip.html http://s4.quicksharing.com/v/5209480/1Sample13.zip.html http://s4.quicksharing.com/v/1426353/Sample14.zip.html

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menno View Member Profile	Jan 5 2007, 11:43 Post #2
Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267	First of all, thanks to everyone who has already contributed! For the people who still want to participate, please remember that the test runs until the 8th, which is next monday!

Posts in this topic

menno 80 kbps LC AAC listening test Dec 21 2006, 11:20

dand Good idea to clarify the is&pns issues. Mysel... Dec 21 2006, 12:20

Sebastian Mares Can anyone confirm that downloads work only with I... Dec 21 2006, 12:42

menno QUOTE (Sebastian Mares @ Dec 21 2006, 12... Dec 21 2006, 12:45

Sebastian Mares QUOTE (menno @ Dec 21 2006, 12:45) QUOTE ... Dec 21 2006, 13:14

IgorC menno Only LC is included to test? Is the reason ... Dec 21 2006, 15:57

menno QUOTE (IgorC @ Dec 21 2006, 15:57) menno ... Dec 22 2006, 08:45

Maurits QUOTE (Sebastian Mares @ Dec 21 2006, 11... Dec 21 2006, 12:50

guruboolez Opera 9.1 is OK too. Dec 21 2006, 12:59

spockep So in short you just need the .erf files zipped th... Dec 21 2006, 19:37

menno QUOTE (spockep @ Dec 21 2006, 19:37) So i... Dec 22 2006, 13:03

Firon Quicksharing isn't loading for me at all... Ca... Dec 22 2006, 05:47

halb27 Can a user expect that his LC decoder (for instanc... Dec 22 2006, 10:14

menno QUOTE (halb27 @ Dec 22 2006, 10:14) Can a... Dec 22 2006, 10:25

muaddib Here, I have uploaded all the files to zshare: ab... Dec 22 2006, 10:45

muaddib For most of the tests it is hard for me to determi... Dec 22 2006, 11:02

IgorC QUOTE (muaddib @ Dec 22 2006, 02:02) For ... Dec 23 2006, 03:39

muaddib QUOTE (IgorC @ Dec 23 2006, 03:39) QUOTE ... Dec 23 2006, 20:47

SirChristof My main problem is, in order to properly prepare m... Jan 5 2007, 09:07

muaddib QUOTE (SirChristof @ Jan 5 2007, 09:07) M... Jan 8 2007, 10:49

menno First of all, thanks to everyone who has already c... Jan 5 2007, 11:43

IgorC menno Can you confirm if you received my results? ... Jan 6 2007, 20:51

menno QUOTE (IgorC @ Jan 6 2007, 20:51) menno C... Jan 7 2007, 11:16

menno Because we didn't get so many results yet, we ... Jan 8 2007, 13:35

SirChristof QUOTE (muaddib @ Jan 8 2007, 04:49) IMO i... Jan 8 2007, 14:07

muaddib QUOTE (SirChristof @ Jan 8 2007, 14:07) D... Jan 8 2007, 14:27

menno Again thanks to all who have participated. Unfortu... Jan 15 2007, 13:32

starcy Why not just user can decide this? Jan 16 2007, 11:46

Ivan Dimkovic Because we want to avoid flood of suboptimal encod... Jan 16 2007, 12:21

dand QUOTE (Ivan Dimkovic @ Jan 16 2007, 12:21... Jan 16 2007, 17:13

IgorC QUOTE (dand @ Jan 16 2007, 08:13) QUOTE (... Jan 16 2007, 22:50

Garf QUOTE (IgorC @ Jan 16 2007, 22:50) QUOTE ... Jan 16 2007, 23:34

dand QUOTE (Garf @ Jan 16 2007, 23:34) QUOTE (... Jan 17 2007, 13:54

Garf QUOTE (dand @ Jan 17 2007, 13:54) QUOTE (... Jan 17 2007, 18:08

menno I think IS does work, just the PNS gave troubles Jan 17 2007, 18:45

menno It would be great if we could get some more result... Jan 25 2007, 16:04

sketchy_c I should have read that last post before testing t... Jan 28 2007, 23:20

menno Since we still don't have enough results, we w... Jan 29 2007, 19:38

gameplaya15143 Cool.. now I just have to stop forgetting this tes... Jan 31 2007, 01:25

menno QUOTE (gameplaya15143 @ Jan 31 2007, 01:2... Feb 1 2007, 08:42

IgorC German speech sample N5 was very low scored in 48... Feb 6 2007, 19:41

gameplaya15143 I got through samples 14-8 before I started to los... Feb 9 2007, 02:38

Diow I'm save my results in .erf but don't save... Feb 9 2007, 03:06

Firon You can't open them. THey're encrypted res... Feb 9 2007, 03:12

Diow QUOTE (Firon @ Feb 9 2007, 00:12) You can... Feb 9 2007, 12:53

sketchy_c Menno, is this still ongoing? Not sure if the 1.0... Feb 13 2007, 13:17

menno Yes, test is still going on. We are very thankful ... Feb 13 2007, 15:50

Jerethi Currently working my way through the samples. Com... Mar 4 2007, 01:54

Diow Is the test now ended or still running? Mar 4 2007, 15:31

Jerethi QUOTE (Diow @ Mar 4 2007, 07:31) Is the t... Mar 4 2007, 20:01

menno We now have about enough results, test will end on... Mar 5 2007, 10:43

The Sheep of DEATH So how did it go? (I mean, were you able to answ... Mar 15 2007, 16:55

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