ETSI TS 103 433-1 V1.2.1 (2017-08)

TECHNICAL SPECIFICATION
High-Performance Single Layer High Dynamic Range (HDR)
System for use in Consumer Electronics devices;
Part 1: Directly Standard Dynamic Range (SDR)
Compatible HDR System (SL-HDR1)

2 ETSI TS 103 433-1 V1.2.1 (2017-08)

Reference
RTS/JTC-040-1
Keywords
broadcasting, content, digital, distribution, HDR,
HDTV, UHDTV, video
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ETSI
3 ETSI TS 103 433-1 V1.2.1 (2017-08)
Contents
Intellectual Property Rights . 9
Foreword . 9
Modal verbs terminology . 9
Introduction . 10
1 Scope . 12
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions, symbols, abbreviations and conventions . 13
3.1 Definitions . 13
3.2 Symbols . 15
3.2.1 Arithmetic operators . 15
3.2.2 Mathematical functions . 15
3.2.3 Logical operators . 16
3.3 Abbreviations . 16
3.4 Conventions . 16
4 End-to-end system . 17
5 HDR system architecture. 18
6 Dynamic metadata format for signal reconstruction . 18
6.1 Introduction . 18
6.2 Reconstruction metadata syntax . 19
6.2.1 Introduction. 19
6.2.2 Signal reconstruction information . 19
6.2.3 HDR picture characteristics . 19
6.2.4 SDR picture characteristics . 20
6.2.5 Luminance mapping variables . 20
6.2.6 Colour correction adjustment variables . 20
6.2.7 Luminance mapping table . 21
6.2.8 Colour correction table . 21
6.2.9 Gamut mapping variables . 21
6.3 Reconstruction metadata semantics . 22
6.3.1 Introduction. 22
6.3.2 Signal reconstruction information . 23
6.3.2.1 Introduction . 23
6.3.2.2 partID - part indicator of the multi-part document . 23
6.3.2.3 majorSpecVersionID - Major specification version indicator . 23
6.3.2.4 minorSpecVersionID - Minor specification version indicator . 23
6.3.2.5 payloadMode - Payload carriage mode . 23
6.3.2.6 matrixCoefficient - Y'CC-to-R'G'B' conversion matrix coefficients . 23
6.3.2.7 chromaToLumaInjection - Chroma to luma injection . 24
6.3.2.8 kCoefficient . 24
6.3.2.9 gamutMappingMode . 24
6.3.3 HDR picture characteristics . 25
6.3.3.1 Introduction . 25
6.3.3.2 hdrPicColourSpace - HDR picture colour space . 25
6.3.3.3 hdrDisplayColourSpace - Colour space of the mastering display used to master the HDR picture . 26
6.3.3.4 hdrDisplayMaxLuminance - HDR mastering display maximum luminance . 26
6.3.3.5 hdrDisplayMinLuminance - HDR mastering display minimum luminance . 26
6.3.4 SDR picture characteristics . 26
6.3.4.1 Introduction . 26
6.3.4.2 sdrPicColourSpace - SDR picture colour space . 26
6.3.4.3 sdrDisplayMaxLuminance - SDR mastering display maximum luminance . 27
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4 ETSI TS 103 433-1 V1.2.1 (2017-08)
6.3.4.4 sdrDisplayMinLuminance - SDR mastering display minimum luminance . 27
6.3.5 Luminance mapping variables . 27
6.3.5.1 Introduction . 27
6.3.5.2 tmInputSignalBlackLevelOffset - Tone Mapping Input Signal Black Level Offset . 27
6.3.5.3 tmInputSignalWhiteLevelOffset - Tone Mapping Input Signal White Level Offset . 27
6.3.5.4 shadowGain - Shadow Gain Control . 28
6.3.5.5 highlightGain - Highlight Gain Control . 28
6.3.5.6 midToneWidthAdjFactor - Mid-Tone Width Adjustment Factor . 28
6.3.5.7 tmOutputFineTuningNumVal - Number of Tone Mapping Output Fine Tuning Function Curve
P oints . 28
6.3.5.8 tmOutputFineTuningX - Tone Mapping Output Fine Tuning Function x values . 28
6.3.5.9 tmOutputFineTuningY - Tone Mapping Output Fine Tuning Function y values . 28
6.3.6 Colour correction adjustment variables . 29
6.3.6.1 Introduction . 29
6.3.6.2 saturationGainNumVal - Number of Saturation Gain Function Curve Points . 29
6.3.6.3 saturationGainX - Saturation Gain Function x values . 29
6.3.6.4 saturationGainY - Saturation Gain Function y values . 29
6.3.7 Luminance mapping table . 29
6.3.7.1 Introduction . 29
6.3.7.2 luminanceMappingNumVal - Number of Luminance Mapping Curve Points . 29
6.3.7.3 luminanceMappingX - Luminance Mapping x values . 29
6.3.7.4 luminanceMappingY - Luminance Mapping y values . 30
6.3.8 Colour correction table . 30
6.3.8.1 Introduction . 30
6.3.8.2 colourCorrectionNumVal - Number of Colour Correction Curve Points. 30
6.3.8.3 colourCorrectionX - Colour Correction x values . 30
6.3.8.4 colourCorrectionY - Colour Correction y values . 30
6.3.9 Gamut mapping variables . 30
6.3.9.1 Introduction . 30
6.3.9.2 satMappingMode - Saturation mapping mode . 31
6.3.9.3 satGlobal1SegRatio . 31
6.3.9.4 satGlobal2SegRatioWCG . 31
6.3.9.5 satGlobal2SegRatioSCG . 31
6.3.9.6 sat1SegRatio. 31
6.3.9.7 sat2SegRatioWCG . 31
6.3.9.8 sat2SegRatioSCG . 31
6.3.9.9 lightnessMappingMode . 32
6.3.9.10 lmWeightFactor . 32
6.3.9.11 croppingModeSCG . 32
6.3.9.12 cmWeightFactor . 32
6.3.9.13 cmCroppedLightnessMappingEnabledFlag . 32
6.3.9.14 hueAdjMode. 33
6.3.9.15 hueGlobalPreservationRatio. 33
6.3.9.16 huePreservationRatio . 33
6.3.9.17 hueAlignCorrectionPresentFlag . 33
6.3.9.18 hueAlignCorrection . 33
6.3.9.19 chromAdjPresentFlag . 33
6.3.9.20 chromAdjParam . 33
7 HDR signal reconstruction process . 34
7.1 Input streams . 34
7.2 Reconstruction process of the HDR stream . 34
7.2.1 Introduction. 34
7.2.2 Selecting a reconstruction mode . 35
7.2.3 Luminance mapping and colour correction tables construction . 35
7.2.3.1 Luminance mapping table construction from variables (payloadMode 0) . 35
7.2.3.1.1 Introduction . 35
7.2.3.1.2 Overview of the computation of lutMapY . 35
7.2.3.1.3 Block "To perceptual uniform signal" . 36
7.2.3.1.4 Block "Adjustment curve" . 37
7.2.3.1.5 Block "Inverse tone mapping curve" . 37
7.2.3.1.6 Block "Black/white level adaptation" . 39
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5 ETSI TS 103 433-1 V1.2.1 (2017-08)
7.2.3.1.7 Block "Gain limiter" . 40
7.2.3.1.8 Block "To linear signal" . 40
7.2.3.1.9 Block "Inverse EOTF" . 40
7.2.3.2 Colour correction table construction from parameter-based mode (payloadMode 0) . 41
7.2.3.3 Luminance mapping table retrieval (payloadMode 1) . 42
7.2.3.4 Colour correction table retrieval (payloadMode 1) . 42
7.2.4 HDR picture reconstruction from look-up tables and SDR picture . 42
7.3 Piecewise linear function computation . 44
Annex A (normative): SL-HDR reconstruction metadata using HEVC . 45
A.1 Introduction . 45
A.2 SL-HDR SEI message definition and mapping . 45
A.2.1 Introduction . 45
A.2.2 SL-HDR information SEI message . 45
A.2.2.1 Introduction. 45
A.2.2.2 SL-HDR information SEI message syntax . 45
A.2.2.3 Gamut mapping syntax . 47
A.2.2.4 SL-HDR SEI message semantics . 48
A.2.2.5 Gamut mapping semantics . 52
A.2.3 SL-HDR metadata mapping . 54
A.2.3.1 Introduction. 54
A.2.3.2 Signal reconstruction information . 54
A.2.3.2.1 Introduction . 54
A.2.3.2.2 partID mapping . 54
A.2.3.2.3 majorSpecVersionID mapping . 54
A.2.3.2.4 minorSpecVersionID mapping . 54
A.2.3.2.5 payloadMode mapping . 54
A.2.3.2.6 matrixCoefficient mapping . 54
A.2.3.2.7 chromaToLumaInjection mapping . 54
A.2.3.2.8 kCoefficient mapping . 54
A.2.3.2.9 gamutMappingMode mapping . 54
A.2.3.3 HDR picture characteristics . 55
A.2.3.3.1 Introduction . 55
A.2.3.3.2 hdrPicColourSpace mapping . 55
A.2.3.3.3 hdrDisplayColourSpace mapping . 55
A.2.3.3.4 hdrDisplayMaxLuminance mapping . 56
A.2.3.3.5 hdrDisplayMinLuminance mapping . 56
A.2.3.4 SDR picture characteristics . 57
A.2.3.4.1 Introduction . 57
A.2.3.4.2 sdrPicColourSpace mapping . 57
A.2.3.4.3 sdrDisplayMaxLuminance mapping . 57
A.2.3.4.4 sdrDisplayMinLuminance mapping . 57
A.2.3.5 Luminance mapping variables . 57
A.2.3.5.1 Introduction . 57
A.2.3.5.2 tmInputSignalBlackLevelOffset mapping . 57
A.2.3.5.3 tmInputSignalWhiteLevelOffset mapping . 57
A.2.3.5.4 shadowGain mapping . 57
A.2.3.5.5 highlightGain mapping . 58
A.2.3.5.6 midToneWidthAdjFactor mapping . 58
A.2.3.5.7 tmOutputFineTuningNumVal mapping . 58
A.2.3.5.8 tmOutputFineTuningX mapping . 58
A.2.3.5.9 tmOutputFineTuningY mapping . 58
A.2.3.6 Colour correction adjustment variables . 58
A.2.3.6.1 Introduction . 58
A.2.3.6.2 saturationGainNumVal mapping . 58
A.2.3.6.3 saturationGainX mapping . 58
A.2.3.6.4 saturationGainY mapping . 58
A.2.3.7 Luminance mapping table . 58
A.2.3.7.1 Introduction . 58
A.2.3.7.2 luminanceMappingNumVal mapping . 58
A.2.3.7.3 luminanceMappingX mapping . 59
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6 ETSI TS 103 433-1 V1.2.1 (2017-08)
A.2.3.7.4 luminanceMappingY mapping . 59
A.2.3.8 Colour correction table . 59
A.2.3.8.1 Introduction . 59
A.2.3.8.2 colourCorrectionNumVal mapping . 59
A.2.3.8.3 colourCorrectionX mapping . 59
A.2.3.8.4 colourCorrectionY mapping . 59
A.2.3.9 Gamut mapping variables . 59
A.2.3.9.1 Introduction . 59
A.2.3.9.2 satMappingMode mapping . 60
A.2.3.9.3 satGlobal1SegRatio mapping . 60
A.2.3.9.4 satGlobal2SegRatioWCG mapping . 60
A.2.3.9.5 satGlobal2SegRatioSCG mapping . 60
A.2.3.9.6 sat1SegRatio mapping . 60
A.2.3.9.7 sat2SegRatioWCG mapping . 60
A.2.3.9.8 sat2SegRatioSCG mapping . 60
A.2.3.9.9 lightnessMappingMode mapping . 60
A.2.3.9.10 lmWeightFactor mapping . 60
A.2.3.9.11 croppingModeSCG mapping. 60
A.2.3.9.12 cmWeightFactor mapping . 60
A.2.3.9.13 cmCroppedLightnessMappingEnabledFlag mapping . 60
A.2.3.9.14 hueAdjMode mapping . 61
A.2.3.9.15 hueGlobalPreservationRatio mapping . 61
A.2.3.9.16 huePreservationRatio mapping . 61
A.2.3.9.17 hueAlignCorrectionPresentFlag mapping . 61
A.2.3.9.18 hueAlignCorrection mapping . 61
A.2.3.9.19 chromAdjPresentFlag mapping . 61
A.2.3.9.20 chromAdjParam mapping . 61
A.3 Mastering Display Colour Volume SEI message mapping . 61
A.3.1 Introduction . 61
A.3.2 HDR picture characteristic s . 62
Annex B (normative): SL-HDR reconstruction metadata using AVC . 63
Annex C (informative): HDR-to-SDR decomposition principle . 64
C.1 Introduction . 64
C.1.1 Process overview . 64
C.1.2 Theoretical decomposition process . 64
C.1.3 Reference implementation . 65
C.2 Mapping and colour functions derivation. 66
C.2.1 Introduction . 66
C.2.2 Computation of the function () (payloadMode 0) . 66 M
C.2.2.1 Overview of the computation of LUT () . 66
TM
C.2.2.2 Block "To perceptual uniform signal" . 67
C.2.2.3 Block "Black/white level adaptation" . 68
C.2.2.4 Block "Tone mapping curve" . 69
C.2.2.5 Block "Adjustment curve" . 70
C.2.2.6 Block "Gain limiter" . 71
C.2.2.7 Block "To linear signal". 71
C.2.2.8 Final output . 72
C.2.3 Computation of the colour correction function . 72
C.3 Automatic parameter generation during encoding . 73
C.3.1 Introduction . 73
C.3.2 Automatic tone mapping parameter generation from only an HDR picture . 73
C.3.2.1 Introduction. 73
C.3.2.2 Calculation of tmInputSignalBlackLevelOffset, tmInputSignalWhiteLevelOffset . 73
C.3.2.3 Calculation of shadowGain . 74
C.3.2.4 The parameters highlightGain and midToneWidthAdjFactor . 75
C.3.3 Temporal filtering of tone mapping parameters . 75
C.3.4 Simplified process for colour correction function generation . 78
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C.3.4.1 Introduction. 78
C.3.4.2 Simplified colour correction derivation process . 78
C.3.4.3 Selection of the colour correction LUT . 79
Annex D (informative): Invertible gamut mapping . 81
D.1 Introduction . 81
D.2 Notations and definitions. 82
D.2.1 Introduction . 82
D.2.2 Notations . 82
D.2.3 Definitions . 83
D.2.3.1 Introduction. 83
D.2.3.2 Line defined by two points . 83
D.2.3.3 Intersections . 83
D.2.3.4 Cusp . 84
D.2.3.5 Sector . 85
D.2.3.6 Computing the cusp colour using a sector . 87
D.2.3.7 Boundary . 87
D.3 Forward gamut mapping process . 89
D.3.1 Introduction . 89
D.3.2 Video content adaptation . 90
D.3.3 Hue mapping . 91
D.3.3.1 Introduction. 91
D.3.3.2 Deriving the rotated gamut . 92
D.3.3.3 Hue mapping without preserved area. 92
D.3.3.4 Deriving the preserved gamut . 94
D.3.3.5 Hue mapping with preserved area . 94
D.3.4 Lightness mapping . 97
D.3.4.1 Introduction. 97
D.3.4.2 Deriving the lightness cropped gamut . 97
D.3.4.3 Deriving the lightness mapping weighting factors . 98
D.3.4.4 Parabolic lightness mapping . 98
D.3.5 Chrominance mapping . 100
D.3.5.1 Introduction. 100
D.3.5.2 Computing the boundary of a warped gamut . 100
D.3.5.3 Deriving the compression parameters from the metadata . 101
D.3.5.4 Compressing the chrominance . 102
D.3.6 Interfacing with SL-HDR1 decomposition . 103
D.4 Inverse gamut mapping process . 103
D.4.1 Introduction . 103
D.4.2 Interfacing with SL-HDR1 reconstruction . 104
D.4.3 Chrominance remapping . 105
D.4.4 Lightness remapping . 106
D.4.5 Hue remapping . 107
D.4.5.1 Introduction. 107
D.4.5.2 Hue remapping without
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