ITU R BS 1387:2001
ITU R BS 1387:2001 Method For Objective Measurements Of Perceived Audio Quality
Table of Contents
ForewordTableofcontents
ANNEX1-Overview
1Introduction
2Applications
3Versions
4Thesubjectivedomain
5Resolutionandaccuracy
6Requirementsandlimitations
APPENDIX1TOANNEX1-Applications
1General
2Mainapplications
2.1Assessmentofimplementations
2.2Perceptualqualitylineup
2.3On-linemonitoring
2.4Equipmentorconnectionstatus
2.5Codecidentification
2.6Codecdevelopment
2.7Networkplanning
2.8Aidtosubjectiveassessment
2.9Summaryofapplications
3Testsignals
3.1Selectionofnaturaltestsignals
3.2Duration
4Synchronization
5Copyrightissues
APPENDIX2TOANNEX1-Outputvariables
1Introduction
2ModelOutputVariables
3BasicAudioQuality
4CodingMargin
5Userrequirements
APPENDIX3TOANNEX1-Modeloutline
1Audioprocessing
1.1User-definedsettings
1.2Psycho-acousticmodel
1.3Cognitivemodel
APPENDIX4TOANNEX1-Principlesandcharacteristicsof
objectiveperceptualaudioquality
measurementmethods
1Introductionandhistory
2Generalstructureofobjectiveperceptualaudioquality
measurementmethods
3Psycho-acousticalandcognitivebasics
3.1Outerandmiddleeartransfercharacteristic
3.2Perceptualfrequencyscales
3.3Excitation
3.4Detection
3.5Masking
3.6Loudnessandpartialmasking
3.7Sharpness
3.8Cognitiveprocessing
4Modelsincorporated
4.1DIX
4.2NMR
4.3OASE
4.4PerceptualAudioQualityMeasure(PAQM)
4.5PERCEVAL
4.6POM
4.7Thetoolboxapproach
ANNEX2-Descriptionofthemodel
1Outline
1.1BasicVersion
1.2AdvancedVersion
2Peripheralearmodel
2.1FFT-basedearmodel
2.2Filterbank-basedearmodel
3Pre-processingofexcitationpatterns
3.1Levelandpatternadaptation
3.2Modulation
3.3Loudness
3.4Calculationoftheerrorsignal
4CalculationofModelOutputVariables
4.1Overview
4.2Modulationdifference
4.3Noiseloudness
4.4Bandwidth
4.5Noise-to-MaskRatio
4.6RelativeDisturbedFramesB
4.7Detectionprobability
4.8Harmonicstructureoferror
5Averaging
5.1Spectralaveraging
5.2Temporalaveraging
5.3Averagingoveraudiochannels
6Estimationoftheperceivedbasicaudioquality
6.1Artificialneuralnetwork
6.2BasicVersion
6.3AdvancedVersion
7Conformanceofimplementations
7.1General
7.2Selection
7.3Settingsfortheconformancetest
7.4Acceptabletoleranceinterval
7.5Testitems
APPENDIX1TOANNEX2-Validationprocess
1General
2Competitivephase
3Collaborativephase
4Verification
4.1ComparisonofSDGandODGvalues
4.2Correlation
4.3AbsoluteErrorScore(AES)
4.4ComparisonofODGversustheconfidenceinterval
4.5ComparisonofODGversusthetolerance-interval
5Selectionoftheoptimalmodelversions
5.1Pre-selectioncriteriabasedoncorrelation
5.2Analysisofnumberofoutliers
5.3Analysisofseverenessofoutliers
6Conclusion
APPENDIX2TOANNEX2-Descriptionsofthereference
databases
1Introduction
2Itemsperdatabase
3Experimentalconditions
3.1MPEG90
3.2MPEG91
3.3ITU92DI
3.4ITU92CO
3.5ITU93
3.6MPEG95
3.7EIA95
3.8DB2
3.9DB3
3.10CRC97
4ItemsperconditionforDB2andDB3
4.1DB2
4.2DB3