IEC 中 Technical ISO Report IS0/IEC TR 23002-9 First edition Information technology MPEG 2024-07 video technologies : Part 9: Film grain synthesis technology for video applications Technologies de I'information-Technologies vidéo MPEG- Partie 9: Technologie de la synthese du grain de film pour les applications video Referencenumber ISO/IECTR23002-9:2024(en) @ISO/IEC2024 IS0/IEC TR23002-9:2024(en) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC2024 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 below or Iso's member body in the country of the requester. ISO copyright office CP 40i: Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland @IS0/IEC 2024- All rights reserved i IS0/IECTR23002-9:2024(en) Contents Page Foreword. Introduction .vi 1 Scope. .1 2 Normative references .1 3 Terms and definitions .1 4 Abbreviated terms .2 5 Conventions .2 5.1 .2 General 5.2 Arithmetic operators .2 5.3 3 Bit-wise operators 5.4 Assignmentoperators .3 5.5 ..3 Relational,logical and other operators 5.6 Range notation. .4 5.7 Mathematical functions. .4 5.8 Order ofoperations .4 Overview of film grain technologies. 5 6 6.1 General .5 6.2 Film grain technical characteristics .5 6.3 Film grain modelling. .7 6.4 Film grain use cases and applications ..8 6.5 Film grain workflow. ..8 Film grain synthesis .10 7.1 General .10 7.2 Generaldescription offilmgrain synthesis ..10 7.2.1 General .10 7.2.2 Grainpatterntemplategeneration .11 7.2.3 Randomization 12 7.2.4 Local adaptation ..15 7.2.5 Deblocking .17 7.2.6 Blending.. .17 7.3 Examples offilm grain synthesis using thefrequency filtering model ..17 7.3.1 SMPTERDD5 .17 7.3.2 Variants based on SMPTERDD 5 .19 7.4 Examples offilmgrain synthesis usingthe autoregressivemodel 20 FGCSEImessagebasedautoregressivemodel. .20 7.4.1 7.4.2 .21 AFGS1model. 7.5 Example of film grain synthesis supporting both the frequency filtering and autoregressivemodels .24 7.5.1 General .24 7.5.2 Film grain template generation .24 7.5.3 Randomization .24 7.5.4 Local adaptation .24 Deblocking 7.5.5 25 7.5.6 Blending. 25 Film grain analysis 8 25 8.1 General. 25 8.2 Denoising and image analysis 26 Denoising 26 8.2.1 8.2.2Edgeandtextureanalysis 26 .27 8.3 Determinationofgrainscalingfunction 8.3.1 .27 General 8.3.2 AnexampleofFGCSEImessagescalingfactorestimation .27 @IS0/IEC 2024-All rights reserved iii