IEC 61966-12-1:2011

IEC 61966-12-1 ®
Edition 1.0 2011-01
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – &olour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)

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IEC 61966-12-1 ®
Edition 1.0 2011-01
INTERNATIONAL
STANDARD
colour
inside
Multimedia systems and equipment – &olour measurement and management –
Part 12-1: Metadata for identification of colour gamut (Gamut ID)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
W
ICS 17.180.20; 33.160 ISBN 978-2-88912-309-4
– 2 – 61966-12-1 Ó IEC:2011(E)

CONTENTS
FOREW ORD . 4

INTRODUCTION . 6

1 Sc o pe . 7

2 Normative references . 7

3 Terms and definitions . 8

4 Abbrev iations . 8

5 Overview . 8

6 Header of Gamut ID metadata. 9
7 Description of gamut geometry (full profile) . 10
7.1 General . 10
7.2 Gamut geometry . 11
7.3 Header of description of gamut geometry. 12
7.4 Gamut instances . 14
7.5 Gamut hulls . 16
7.6 Gamut component . 17
7.6.1 General . 17
7.6.2 Packing of face indices . 17
7.7 Faces . 18
7.7.1 General . 18
7.7.2 Packing of vertex indices . 19
7.8 Vertices . 19
7.8.1 General . 19
7.8.2 Packing of colour space coordinates for vertices . 20
8 Description of gamut geometry (medium and simple profiles) . 21
8.1 General . 21
8.2 Medium profile . 21
8.3 Simple profile . 21
9 Description of colour reproduction . 22
Annex A (informative) Size of Gamut ID metadata . 25
Annex B (informative) Motivation and requirements . 26
Annex C (informative) Use of profiles . 32

Annex D (informative) Example of Gamut ID metadata in simple profile . 34
Bibliography . 38

Figure 1 – Logical structure of the description of gamut geometry (full profile) . 11
Figure B.1 – Scope of Gamut ID – Generation and use of metadata are not specified . 27
Figure B.2 – Example of a description of gamut geometry in CIEXYZ colour space
consisting of a set of triangular faces. 28
Figure B.3 – Example of a gamut with identified ridge due to colorant channels . 30
Figure B.4 – Example of a non-convex gamut with two convex gamut hulls. 31

Table 1 – Format of Gamut ID metadata . 8
Table 2 – Header of Gamut ID metadata . 9
Table 3 – Bit depth for encoding of a colour space coordinate . 10

61966-12-1 Ó IEC:2011(E) – 3 –

Table 4 – Description of gamut geometry . 12

Table 5 – Header of description of gamut geometry . 13

Table 6 – Gamut instances . 14

Table 7 – ith Gamut instance . 15

Table 8 – Gamut hulls . 16

Table 9 – hth gamut hull . 16

Table 10 – Definition of gamut components . 17

Table 11 – cth gamut component. 17

Table 12 – Example for packing of gamut components . 18
Table 13 – Definition of faces . 18
Table 14 – Example for packing of faces . 19
Table 15 – Vertices. 20
Table 16 – Packing of 10-bit colour space coordinates . 20
Table 17 – Packing of 12-bit colour space coordinates . 21
Table 18 – Description of gamut geometry (simple profile) . 22
Table 19 – Header of description of gamut geometry (simple profile) . 22
Table 20 – Definition of vertices (simple profile) . 22
Table B.1 – Requirements and Gamut ID features . 29
Table C.1 – Profiles for the description of gamut geometry . 32
Table D.1 – Colour gamut for digital cinema . 34
Table D.2 – Example for the header . 34
Table D.3 – Example for the header of description of gamut geometry . 35
Table D.4 – Example of definition of vertices . 35

– 4 – 61966-12-1 Ó IEC:2011(E)

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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International Standard IEC 61966-12-1 has been prepared by technical area 2: Colour
measurement and management, of IEC technical committee 100: Audio, video and multimedia
systems and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
100/1757/FDIS 100/1776/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61966-12-1 Ó IEC:2011(E) – 5 –

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