IEC TR 63274:2021

IEC TR 63274 ®
Edition 1.0 2021-03
TECHNICAL
REPORT
colour
inside
Power consumption of high dynamic range television sets

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IEC TR 63274 ®
Edition 1.0 2021-03
TECHNICAL
REPORT
colour
inside
Power consumption of high dynamic range television sets

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.40 ISBN 978-2-8322-9512-0

– 2 – IEC TR 63274:2021 © IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative reference . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 11
4 Overview . 12
4.1 High dynamic range video . 12
4.2 HDR TV market . 13
5 HDR TV power measurement challenges . 14
5.1 Overview. 14
5.2 Content analysis . 15
5.2.1 General . 15
5.2.2 Sources of HDR video content . 15
5.2.3 HDR metadata . 16
5.2.4 Increased complexity of display technologies enabling HDR . 16
5.3 HDR video content aspects beyond the scope of this report . 16
6 Dominant aspects for HDR TV power consumption measurement . 17
6.1 Overview. 17
6.2 Fundamental criteria and requirements for Final HDR Test Clip deliverable . 18
6.3 HDR media formats . 19
6.4 Differences between HDR formats . 19
6.5 Mastering display brightness . 21
6.6 Resolution, scan type and frame rate . 22
6.7 Aspect ratio . 22
6.8 Picture level . 23
6.9 Content signal level analysis method . 23
7 Fundamental objectives of HDR test clip deliverable . 24
7.1 Overview. 24
7.2 CLASP source material . 24
7.3 Luminance, APL and colour saturation properties . 24
7.4 Order of scenes . 25
7.5 Creating the initial HDR test clip . 26
7.6 Optimization of initial HDR test clip to match power statistics . 27
8 Generation of the final HDR test clips . 28
8.1 HDR signal properties . 28
8.1.1 Overview . 28
8.1.2 Colour gamut . 28
8.1.3 Colour depth . 28
8.1.4 Chroma subsampling . 29
8.2 Converting the optimised test clip to the recommended formats . 29
8.3 Additional elements . 29
8.3.1 Countdown timer . 29
8.3.2 Audio tone . 29
9 Delivery of test media . 29

10 Rating of SD and HDR power consumption . 30
11 Summary . 30
Annex A (informative) Other considerations for a next-generation TV power
measurement standard . 32
A.1 Overview. 32
A.2 Visual overlays . 32
A.3 Motion-based features . 32
A.4 Standby modes and smart television set features . 32
A.4.1 Quick start . 32
A.4.2 Networked standby features . 33
A.4.3 Smart TV applications . 33
A.5 Audio . 33
Annex B (informative) Details on content assessment methods . 34
B.1 Overview. 34
B.2 Methods for analysis done by PCL on December 20, 2018 . 34
B.2.1 General . 34
B.2.2 Test method . 34
B.2.3 File name decoder . 34
B.2.4 Workflow for experimental test clips . 35
B.3 Methods for analysis done by PCL on March 20, 2019 . 38
B.4 Rendering final test clip from DaVinci Resolve Studio 15 . 38
B.4.1 HDR10 workflow . 38
B.4.2 HLG workflow . 40
Annex C (informative) Technical description for converting SMPTE ST 2084 to HLG . 42
C.1 Overview. 42
C.2 Step 1: Convert from SMPTE ST 2084 to absolute linear light . 42
C.3 Step 2: convert from absolute linear light to HLG . 42
C.4 Encoding using command line tools . 44
C.4.1 General . 44
C.4.2 25 fps HDR10 CLI Encode via FFmpeg . 44
C.4.3 25 fps HLG CLI Encode via FFmpeg . 45
Bibliography . 46

Figure 1 – Occurrence of linear and non-linear signal encodings in context of a typical
display processing pipeline and how they can be used to compute APL and APL’ . 10
Figure 2 – Overview of how the deliverables were developed. 17
Figure 3 – Illustration on editing the initial HDR test clip from the CLASP source
material . 27
Figure 4 – Optimization of initial HDR test clip to match power statistics . 27
Figure 5 – Average power consumption of protected HDR content versus optimized
HDR test clip . 28

Table 1 – Fundamental HDR test media format summary . 19
Table 2 – HDR media formats available in the consumer TV landscape . 19
Table 3 – Comparison of HDR media formats on the power consumption (W) of TVs . 21
Table 4 – Power consumption (W) of TVs displaying the colour graded Initial HDR test clip . 21
Table 5 – Power consumption (W) of TVs displaying the assessment HDR video
content in different resolutions . 22

– 4 – IEC TR 63274:2021 © IEC 2021
Table 6 – Power consumption (W) of TVs displaying the assessment HDR video
content with different frame rates . 22
Table 7 – Recommended scene order in the test clip . 25
Table B.1 – Characteristics of TVs of the NEEA test farm used for the March 20, 2019
analysis . 34
Table B.2 – File name decoder . 35
Table B.3 – Workflow . 35
Table B.4 – Resolve master session: PCL Dolby Vision® 4000
...