Video quality metrics are intended to provide calculated values that are strongly correlated with viewer subjective assessments. This Recommendation provides: a) methods for curve fitting VQM objective values to subjective data in order to facilitate the accuracy calculation and to produce a normalized objective value scale that can be used for cross-correlation between different VQMs; b) an algorithm (based on statistical analysis relative to subjective data) to quantify the accuracy of a given VQM; c) a simplified root mean square error calculation to quantify the accuracy of a VQM when the subjective data has roughly equal variance across the VQM scale; d) a method to plot classification errors to determine the relative frequencies of "false tie", "false differentiation", "false ranking", and "correct decision" for a given VQM.
ITU-T J.149 SPANISH-2004 Referenced Document
ANSI T1.801.01-1995 Digital Transport of Video Teleconferencing/Video Telephony Signals - Video Test Scenes for Subjective and Objective Performance Assessment
ATIS T1.TR.73-2001 Video Normalization Methods Applicable to Objective Video Quality Metrics Utilizing a Full Reference Technique*， 2024-04-19 Update
ATIS T1.TR.74-2001 Objective Video Quality Measurement Using a Peak- Signal-to-Noise-Ratio (PSNR) Full Reference Technique*， 2024-04-19 Update
ATIS T1.TR.75-2001 Objective Perceptual Video Quality Measurement Using a JND-Based Full Reference Technique*， 2024-04-19 Update
ATIS T1.TR.77-2002 Data and sample program code to be used with the method specified in T1.TR.72-2001 for the calculation of resolving power of the video quality metrics in T1.TR.74-2001 and T1.TR.75-2001
ITU-R BT.500-11-2002 Methodology for the subjective assessment of the quality of television pictures
ITU-T J.149 SPANISH-2004 history
2004ITU-T J.149 SPANISH-2004 Method for specifying accuracy and cross-calibration of Video Quality Metrics (VQM)