1、 IEC 61966-12-1 Edition 1.0 2011-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Multimedia systems and equipment Colour measurement and management Part 12-1: Metadata for identification of colour gamut (Gamut ID) Systmes et appareils multimdia Mesure et gestion de la couleur Partie 12-1: Mtadonnes d
2、identification des gammes de couleurs (Gamut ID) IEC 61966-12-1:2011 colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, e
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16、sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 61966-12-1 Edition 1.0 2011-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Multimedia systems and equipment Colour measurement an
17、d management Part 12-1: Metadata for identification of colour gamut (Gamut ID) Systmes et appareils multimdia Mesure et gestion de la couleur Partie 12-1: Mtadonnes didentification des gammes de couleurs (Gamut ID) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
18、W ICS 17.180.20; 33.160 PRICE CODE CODE PRIX ISBN 978-2-88912-826-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colour inside 2 61966-12-1 IEC:2011 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative r
19、eferences . 7 3 Terms and definitions . 8 4 Abbreviations . 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 c
20、omponent . 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.
21、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 metadat
22、a 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 s
23、et 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 61966-12-1 IEC:2011 3 Table 3 Bit depth
24、for encoding of a colour space coordinate 10 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 c
25、th 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 Descrip
26、tion 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 21 Header of description of colour reproduction . 23 Table B.1 Requirements and Gamut ID features 29 Table C.1 Profiles for the de
27、scription 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 Table D.5 Encoded colour space coordinates for vertices 36 4 61966-1
28、2-1 IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTIMEDIA SYSTEMS AND EQUIPMENT COLOUR MEASUREMENT AND MANAGEMENT Part 12-1: Metadata for identification of colour gamut (Gamut ID) FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardizatio
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38、 the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be h
39、eld responsible for identifying any or all such patent rights. 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. This bilingual version (2011-12) correspon
40、ds to the monolingual English version, published in 2011-01. 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 ta
41、ble. 61966-12-1 IEC:2011 5 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The French version of this standard has not been voted upon. A list of alll parts of the IEC 61966 series, published under the general title Multimedia systems and equipment Colour measure
42、ment and management, can be found on the IEC website. The committee has decided that the contents of this amendment and the base publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At
43、this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users sho
44、uld therefore print this publication using a colour printer. 6 61966-12-1 IEC:2011 INTRODUCTION New technologies in capturing and displaying wide-gamut colour images enable a new market of wide-gamut video colour content creation. Recent video standards for wide gamut colour space encoding such as I
45、EC 61966-2-4 (xvYCC) were established in order to be able to distribute content with a colour gamut that is extended with respect to classical colour gamuts such as defined by colorimetry standards ITU-R BT.601 (standard definition television) and ITU-R BT.709 (high definition television). With the
46、increasing popularity of wide gamut and high dynamic range content and displays, the variety of colour gamuts of displays is expected to increase. This issue can be an obstacle for adopting wide-gamut video colour content in professional content creation since the compatibility of the content to the
47、 employed displays as well as the compatibility among different displays is not ensured. The term display includes here any video colour reproduction equipment, such as direct view displays and projectors. Thanks to improvements of technology, the variety of colour gamut and colour reproduction capa
48、cities of displays increases while the colour gamut and the colour encoding rules of existing colour space encoding standards are fixed. To address this issue, the IEC standard Gamut ID (IEC 61966-12-1) specifies a colour gamut metadata scheme for video systems including information for colour repro
49、duction. This metadata can amend a video content or a display. More specifically, improvements can be achieved if the wide-gamut colour content is created with the knowledge of the display colour gamut as well as if the colour reproduction in the display is done with the knowledge of the colour gamut of the pictorial content. This standard enables video s
