IEC 61966-12-1:2020
(Main)Multimedia systems and equipment - Colour measurement and management - Part 12-1: Metadata for identification of colour gamut (Gamut ID)
Multimedia systems and equipment - Colour measurement and management - Part 12-1: Metadata for identification of colour gamut (Gamut ID)
IEC 61966-12-1:2020 defines the colour gamut metadata scheme for video systems and similar applications. The metadata can be associated with wide-gamut video colour content or to a piece of equipment to display the content. When associated with content, the colour gamut metadata defines the gamut for which the content was created. It can be used by the display for controlled colour reproduction even if the display’s colour gamut is different from that of the content. When associated with a display, the colour gamut metadata defines the display colour gamut. It can be used during content creation to enable improved colour reproduction. The colour gamut metadata can cover associated colour encoding information, which includes all information required for a controlled colour reproduction, when such information is not provided by the colour encoding specification. The colour gamut metadata scheme provides scalable solutions. For example, more flexible solutions will be used for the professional use, while much simpler solutions will be used for consumer use with easier product implementation. This part of IEC 61966 only defines the colour gamut metadata scheme. Vendor-specific solutions for creation and end-use of this metadata are allowed. IEC 61966-12-1:2020 cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) ITU-R BT.2020 colour spaces added in Clause 6;
b) ITU-R BT.2100 colour spaces added in Clause 6.
Systèmes et appareils multimédias - Mesure et gestion de la couleur - Partie 12-1: Métadonnées d'identification des gammes de couleurs (Gamut ID)
L'IEC 61966-12-1:2020 définit l'agencement des métadonnées des gammes de couleurs destiné aux systèmes vidéo et applications similaires. Les métadonnées peuvent être associées à un contenu vidéo à gamme de couleurs étendue ou à un appareil qui sert à afficher ce contenu. Lorsqu'elles sont associées au contenu, les métadonnées de gamme de couleurs définissent la gamme de couleurs pour laquelle le contenu a été créé. Elles peuvent être utilisées par l'écran pour piloter la reproduction des couleurs, même si la gamme de couleurs de l'écran est différente de celle du contenu. Lorsqu'elles sont associées à un écran, les métadonnées de gamme de couleurs définissent la gamme des couleurs de l'écran. Elles peuvent servir pendant la création du contenu, pour permettre une meilleure reproduction des couleurs. Les métadonnées de gammes de couleurs peuvent intégrer des informations associées de codage des couleurs, dont toutes celles nécessaires à une reproduction contrôlée des couleurs, lorsque ces informations ne sont pas fournies par la spécification du codage des couleurs. L'agencement des métadonnées des gammes de couleurs apporte des solutions évolutives. Par exemple, des solutions plus souples servent à un usage professionnel, alors que des solutions beaucoup plus simples servent au grand public, avec une mise en œuvre plus facile du produit. La présente partie de l'IEC 61966 ne définit que l'agencement des métadonnées des gammes de couleurs. Des solutions spécifiques à un fournisseur, pour la création et l'usage final de ces métadonnées, sont admises. L'IEC 61966-12-1:2020 annule et remplace la première édition parue en 2011. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) ajout des espaces de couleurs UIT-R BT.2020 à l'Article 6;
b) ajout des espaces de couleurs UIT-R BT.2100 à l'Article 6.
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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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International Standards for all electrical, electronic and related technologies.
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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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4) In order
...
IEC 61966-12-1 ®
Edition 2.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Multimedia systems and equipment – Colour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)
Systèmes et appareils multimédias – Mesure et gestion de la couleur –
Partie 12-1: Métadonnées d'identification des gammes de couleurs (Gamut ID)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
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publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
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IEC 61966-12-1 ®
Edition 2.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Multimedia systems and equipment – Colour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)
Systèmes et appareils multimédias – Mesure et gestion de la couleur –
Partie 12-1: Métadonnées d'identification des gammes de couleurs (Gamut ID)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.180.20; 33.160.40 ISBN 978-2-8322-8762-0
– 2 – IEC 61966-12-1:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
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 . 8
5 Header of Gamut ID metadata . 9
6 Description of gamut geometry (full profile) . 12
6.1 General . 12
6.2 Gamut geometry . 12
6.3 Header of description of gamut geometry . 14
6.4 Gamut Instances . 15
6.5 Gamut Hulls . 17
6.6 Gamut Component . 18
6.6.1 General . 18
6.6.2 Packing of face indices . 19
6.7 Faces. 20
6.7.1 General . 20
6.7.2 Packing of vertex indices . 21
6.8 Vertices . 21
6.8.1 General . 21
6.8.2 Packing of colour space coordinates for vertices . 22
7 Description of gamut geometry (medium and simple profiles) . 23
7.1 General . 23
7.2 Medium profile . 23
7.3 Simple profile . 23
8 Description of colour reproduction . 24
Annex A (informative) Size of Gamut ID metadata . 27
Annex B (informative) Motivation and requirements . 28
B.1 History . 28
B.2 Motivation . 28
B.3 Scope of Gamut ID metadata . 29
B.4 Requirements . 29
B.5 Structure . 30
B.6 Specific features . 32
Annex C (informative) Use of profiles . 34
C.1 Gamut ID profiles . 34
C.2 Medium profile . 34
C.3 Simple profile . 35
Annex D (informative) Example of Gamut ID metadata in simple profile . 36
Bibliography . 40
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 . 29
Figure B.2 – Example of a description of gamut geometry in CIEXYZ colour space
consisting of a set of triangular faces . 30
Figure B.3 – Example of a gamut with identified ridge due to colorant channels . 33
Figure B.4 – Example of a non-convex gamut with two convex Gamut Hulls. 33
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 . 14
Table 6 – Gamut Instances . 15
Table 7 – ith Gamut Instance . 16
Table 8 – Gamut Hulls . 17
Table 9 – hth Gamut Hull . 18
Table 10 – Definition of Gamut Components . 19
Table 11 – cth Gamut Component . 19
Table 12 – Example for packing of Gamut Components . 20
Table 13 – Definition of faces . 20
Table 14 – Example for packing of faces . 21
Table 15 – Vertices . 22
Table 16 – Packing of 10-bit colour space coordinates . 22
Table 17 – Packing of 12-bit colour space coordinates . 23
Table 18 – Description of gamut geometry (simple profile) . 24
Table 19 – Header of description of gamut geometry (simple profile) . 24
Table 20 – Definition of vertices (simple profile) . 24
Table 21 – Header of description of colour reproduc
...
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