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IEC 61966-12-1
Edition 2.0 2020-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – Colour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)
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IEC 61966-12-1
Edition 2.0 2020-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – Colour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.180.20; 33.160.40 ISBN 978-2-8322-8905-1
– 2 – IEC 61966-12-1:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 2
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 8
4 Overview . 9
5 Header of Gamut ID metadata . 9
6 Description of gamut geometry (full profile) . 13
6.1 General . 13
6.2 Gamut geometry . 13
6.3 Header of description of gamut geometry . 14
6.4 Gamut Instances . 16
6.5 Gamut Hulls . 18
6.6 Gamut Component . 19
6.6.1 General . 19
6.6.2 Packing of face indices . 20
6.7 Faces. 21
6.7.1 General . 21
6.7.2 Packing of vertex indices . 22
6.8 Vertices . 22
6.8.1 General . 22
6.8.2 Packing of colour space coordinates for vertices . 23
7 Description of gamut geometry (medium and simple profiles) . 24
7.1 General . 24
7.2 Medium profile . 24
7.3 Simple profile . 24
8 Description of colour reproduction . 25
Annex A (informative) Size of Gamut ID metadata . 28
Annex B (informative) Motivation and requirements . 29
B.1 History . 29
B.2 Motivation . 29
B.3 Scope of Gamut ID metadata . 30
B.4 Requirements . 30
B.5 Structure . 31
B.6 Specific features . 33
Annex C (informative) Use of profiles . 35
C.1 Gamut ID profiles . 35
C.2 Medium profile . 35
C.3 Simple profile . 36
Annex D (informative) Example of Gamut ID metadata in simple profile . 37
Bibliography . 41
Figure 1 – Logical structure of the description of gamut geometry (full profile) . 13
Figure B.1 – Scope of Gamut ID – Generation and use of metadata are not specified . 30
Figure B.2 – Example of a description of gamut geometry in CIEXYZ colour space
consisting of a set of triangular faces . 31
Figure B.3 – Example of a gamut with identified ridge due to colorant channels . 34
Figure B.4 – Example of a non-convex gamut with two convex Gamut Hulls. 34
Table 1 – Format of Gamut ID metadata . 9
Table 2 – Header of Gamut ID metadata . 10
Table 3 – Bit depth for encoding of a colour space coordinate . 12
Table 4 – Description of gamut geometry . 14
Table 5 – Header of description of gamut geometry . 15
Table 6 – Gamut Instances . 16
Table 7 – ith Gamut Instance . 17
Table 8 – Gamut Hulls . 18
Table 9 – hth Gamut Hull . 19
Table 10 – Definition of Gamut Components . 20
Table 11 – cth Gamut Component . 20
Table 12 – Example for packing of Gamut Components . 21
Table 13 – Definition of faces . 21
Table 14 – Example for packing of faces . 22
Table 15 – Vertices . 23
Table 16 – Packing of 10-bit colour space coordinates . 23
Table 17 – Packing of 12-bit colour space coordinates . 24
Table 18 – Description of gamut geometry (simple profile) . 25
Table 19 – Header of description of gamut geometry (simple profile) . 25
Table 20 – Definition of vertices (simple profile) . 25
Table 21 – Header of description of colour reproduction . 26
Table B.1 – Requirements and Gamut ID features . 33
Table C.1 – Profiles for the description of gamut geometry . 35
Table D.1 – Colour gamut for digital cinema . 37
Table D.2 – Example for the header . 37
Table D.3 – Example for the header of description of gamut geometry . 38
Table D.4 – Example of definition of vertices . 38
Table D.5 – Encoded colour space coordinates for vertices . 38
– 4 – IEC 61966-12-1:2020 RLV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –
COLOUR MEASUREMENT AND MANAGEMENT –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)
FOREWORD
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