IEC INTERNATIONAL STANDARD 61966-2-2 First edition 2003-01 Multimedia systems and equipment - Colour measurement and management - Part 2-2: Colour management - Extended RGB colour space - scRGB Mesure et gestion de la couleur dans les systemes etappareilsmultimedia- Partie 2-2: Gestion de la couleur- Espace chromatique RVB étendu - scRVB IEC Reference number IEC 61966-2-2:2003(E) Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1. Consolidated editions The IEc is now publishing consolidated versions of its publications. For example, edition numbers1.0,1.1 and 1.2 refer,respectively,tothe base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2. FurtherinformationonIEcpublications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this.publication, including its.validity, is available in the IEc Catalogue of publications (see below) in addition to new editions, amendments and corrigenda. Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEC Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEc web site (http://www.iec.ch/searchpub/cur fut.htm) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recently issued, publications (http://www.iec.ch/online news/ justpub/ip entry.htm)is also available by email.Pleasecontact the Customer Service Centre (see below) for further information. CustomerServiceCentre If you have any questions regarding this publication or need further assistance, please contact theCustomer Service Centre: Email: [email protected] Tel: +4122919 02 11 Fax: +41229190300 IEC INTERNATIONAL STANDARD 61966-2-2 First edition 2003-01 Multimedia systems and equipment Colour measurement and management - Part 2-2: Colour management Extended RGB colour space - scRGB Mesureetgestiondelacouleurdanslessystemes etappareilsmultimedia- Partie 2-2: Gestion de la couleur- Espace chromatique RVB étendu-scRvB @ IEC 2003 — Copyright - all rights reserved mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission,3, rue de Varembe, PO Box 131,CH-1211 Geneva 20, Switzerland PRICE CODE H IEC Commission Electrotechnique Internationale InternationalElectrotechnicalCommission MekyHaponHag3nekTpoTexHwyeckasKoMccug For price, see current catalogue 61966-2-2 @ IEC:2003(E) CONTENTS FOREWORD INTRODUCTION Scope 2 Normative references. 6 3 Definitions 4 Encoding characteristics 4.1 General .. 4.2 Transformation from CIE 1931 XYZ values to 16-bit scRGB values (RscRGB(16), GscRGB(16), BscRGB(16) ) 4.3 Transformation from 16-bit scRGB values (RscRGB(16), GscRGB(16), BscRGB(16) ) to CIE 1931 XYZ values. Annex A (informative) Simple transformation between 8-bit sRGB and 16-bit scRGB values.... 8 Annex B (informative) Non-linear encoding for scRGB: scRGB-nl and its YCC transformation:scYCC-nl...... Annex C (informative) scRGB background information. 12 Bibliography . .16 Figure C.1 - Example workflow using scRGB. ..15 Table B.1-Quantization relationships using scRGB 11 - 3 . 61966-2-2 @IEC:2003(E) INTERNATIONALELECTROTECHNICALCOMMISSION MULTIMEDIASYSTEMS SANDEQUIPMENT COLOURMEASUREMENTAND MANAGEMENT Part 2-2: Colour management Extended RGB colour space - scRGB FOREWORD The IEc (International Electrotechnical Commission) is a worldwide organizat