ITU R BS 644:1990
ITU R BS 644:1990 Audio Quality Parameters For The Performance Of A High-quality Sound-programme Transmission Chain
Table of Contents
ANNEX1-Referencesound-programmetransmissionchainANNEX2-Listofaudioqualityparameters
1Nominalbandwidth
2Amplitude/frequencyresponse
3Group-delayvariation
4Non-lineardistortion
5Errorinreconstitutedfrequency
6Errorinamplitude/amplituderesponse
7Levelstability
8Noise(andsingle-toneinterference)
9Disturbingmodulationbypowersupply
10Stereo:leveldifferencebetweenAandBchannels
11Stereo:phasedifferencebetweenAandBchannels
12Stereo:crosstalkbetweenAandBchannels
ANNEX3
ANNEX4
ANNEX5-Specialmethodsformeasuringaudioquality
parameters
1Measurementofnon-lineardistortionathighfrequencies
inpreemphasizedcircuits
1.1Introduction
1.2Testmethod
1.3Needforcalibrationsignal
1.4Measurementinpreemphasizedcircuits
1.5Usewithdifferentpreemphasischaracteristics
1.6Conclusion
2Methodofmeasurementofimpulsivenoise