INTERNATIONAL ISO/IEC STANDARD 15444-17 First edition 2023-06 Information technology JPEG 2000 image coding system Part 17: Extensions for coding of discontinuous media Technologies de I'information - Systeme de codage d'images JPEG 2000- Partie 17: Extensions pour le codage des supports discontinus Reference number IEC IS0/IEC 15444-17:2023(E) OSI @ IS0/IEC 2023 IS0/IEC 15444-17:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0/IEC 2023 - All rights reserved IS0/IEC 15444-17:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0/IEC 2023 - All rights reserved ISO/IEC 15444-17:2023 (E) INTERNATIONAL STANDARD ISO/IEC 15444-17 RECOMMENDATION ITU-T T.816 (V1) Information technology - JPEG 2000 image coding system: Extensions for coding of discontinuous media Summary Rec. ITU-T T.8161ISO/IEC 15444-17 provides extensions of the scalable image coding tools described in image transforms known as "breakpoint-dependent" transforms are defined, whose underlying basis functions can be discontinuous at defined locations within the image component to which they are applied. Second, new scalable coding tools are described for a new type of image component known as a "breakpoint component", which provides a successively refinable and hierarchical description of the breakpoint locations used by the breakpoint-dependent transforms. Any non- initial component or components within a codestream conforming to this Recommendation I International Standard can be breakpoint-dependent transform that depends upon one of the breakpoint components in the same codestream. These new tools together allow for the scalable coding of imagery that naturally exhibits strong discontinuities in the spatial domain. An important example of such imagery is depth maps. This Recommendation was developed jointly with ISO/IEC JTC 1/SC 29/WG 1 (JPEG) and is common text with ISO/IEC15444-17. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T T.816 (V1) 2023-02-13 16 11.1002/1000/15206 To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendation's unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. iv Rec.ITU-T T.816 (V1) (02/2023) @ IS0/IEC 2023 - All rights reserved ISO/IEC 15444-17:2023 (E) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedu