RECOMMENDATION ITU-R BT.1210 - Test materials to be used in subjective assessment ANNEX 1 - List of test materials ANNEX 2 - Choice of statistics that can serve for characterization of materials 1 Introduction 2 Statistics of test materials Entropy of PCM data 2.2 AC energy 2.3 Spectral entropy 2.4 Motion vector 2.5 Motion-compensated prediction error power 2.6 Criticality by rate-buffer occupancy method 2.7 Criticality by fixed quantizer method APPENDIX 1 TO ANNEX 2 - Statistics of the test materials ANNEX 3 - Status for usage of the test materials (see Note 1)