ISO/IEC INTERNATIONAL STANDARD 21122-4 First edition 2020-06 Information technology - JPEG XS low-latency lightweight image coding system Part 4: Conformance testing Technologies de I'information - Systeme de codage d'images léger a faiblelatenceJPEGXS- Partie 4: Essais de conformité Reference number IEC IS0/IEC 21122-4:2020(E) os1 @ IS0/IEC 2020 Copyright International Organization for Standardizatior IS0/IEC 21122-4:2020(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2020 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 the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address ISO copyright office CP401·Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone:+41227490111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland Copyightilleratinal Organization for Standardization @ IS0/IEC 2020 - All rights reserved IS0/IEC 21122-4:2020(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..2 3 Terms and definitions 4 Typesetting conventions .3 5 Overview .3 6 General description .3 6.1 Overview .3 6.2 Codestream syntax testing. .3 6.3 Test procedures to test decoders for conformance to ISO/IEC 21122-1 3 6.4 Test procedures to test decoders for conformance to IS0/IEC 21122-3 .3 6.5 File format syntax testing. .3 6.6 Profile, level and sublevel conformance testing. 4 6.7 Buffer model conformance testing 4 6.8 Electronic attachments .4 Conformance files availability and updates .4 Annex A (normative) Codestream syntax testing procedures Annex B (normative) Decoder testing procedures. ..6 Annex C (normative) Decoder conformance tests. .9 Annex D (normative) File format syntax testing procedures ..13 Annex E (normative) Buffer model conformance testing ..14 Annex F (informative) Electronic attachments ..16 Bibliography ..18 Copyrght Intematinal OrgIS6Ea220n- All rights reserved ii