ISO_IEC_14496-20_2008_Amd_2_2010E.pdf

Reference numberISO/IEC 14496-20:2008/Amd.2:2010(E)ISO/IEC 2010 INTERNATIONAL STANDARD ISO/IEC14496-20Second edition2008-12-01AMENDMENT 22010-03-01Information technology Coding of audio-visual objects Part 20:Lightweight Application Scene Representation(LASeR)and Simple Aggregation Format(SAF)AMENDMENT 2:Technology for scene adaptation Technologies de linformation Codage des objets audiovisuels Partie 20:Reprsentation de scne dapplication allge(LASeR)et format dagrgation simple(SAF)AMENDEMENT 2:Technologies pour adaptation de scne ISO/IEC 14496-20:2008/Amd.2:2010(E)PDF disclaimer This PDF file may contain embedded typefaces.In accordance with Adobes licensing policy,this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing.In downloading this file,parties accept therein the responsibility of not infringing Adobes licensing policy.The ISO Central Secretariat accepts no liability in this area.Adobe is a trademark of Adobe Systems Incorporated.Details of the software products used to create this PDF file can be found in the General Info relative to the file;the PDF-creation parameters were optimized for printing.Every care has been taken to ensure that the file is suitable for use by ISO member bodies.In the unlikely event that a problem relating to it is found,please inform the Central Secretariat at the address given below.COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2010 All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel.+41 22 749 01 11 Fax +41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2010 All rights reserved ISO/IEC 14496-20:2008/Amd.2:2010(E)ISO/IEC 2010 All rights reserved iiiForeword ISO(the International Organization for Standardization)and IEC(the International Electrotechnical Commission)form the specialized system for worldwide standardization.National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity.ISO and IEC technical committees collaborate in fields of mutual interest.Other international organizations,governmental and non-governmental,in liaison with ISO and IEC,also take part in the work.In the field of information technology,ISO and IEC have established a joint technical committee,ISO/IEC JTC 1.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives,Part 2.The main task of the joint technical committee is to prepare International Standards.Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.Publication as an International Standard requires approval by at least 75%of the national bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.ISO and IEC shall not be held responsible for identifying any or all such patent rights.Amendment 2 to ISO/IEC 14496-20:2008 was prepared by Joint Technical Committee ISO/IEC JTC 1,Information technology,Subcommittee SC 29,Coding of audio,picture,multimedia and hypermedia information.ISO/IEC 14496-20:2008/Amd.2:2010(E)ISO/IEC 2010 All rights reserved 1Information technology Coding of audio-visual objects Part 20:Lightweight Application Scene Representation(LASeR)and Simple Aggregation Format(SAF)AMENDMENT 2:Technology for scene adaptation In Table 3,add the following new LASeR events:Event name Namespace Description Bubble Canc.IDL“DisplaySizeChanged(A)”Urn:mpeg:mpeg4:laser:200 x Occurs when the terminal screen or viewport size has been changed to the specified A value.A is expressed in Inches.DisplaySizeChangedEvent“MemoryStatus(a,b,c)”Urn:mpeg:mpeg4:laser:200 x Occurs when the terminal memory occupancy changes more than the each specified parameter.MemoryStatusEvent The parameters of MemoryStatus event are:a:number of graphics points.If the number of graphic points released/allocated by the terminal is strictly less than a,the event is not triggered.b:number of Unicode characters.If the number of Unicode characters released/allocated by the terminal is strictly less than b,the event is not triggered.c:size,in kilo-bytes,of the composition buffers(as described in 6.11.3).If the size released/allocated by the terminal is strictly less than c,the event is not triggered.In 6.5.6,add the new attribute delta to ExternalValueEvent:interface ExternalValueEvent:LASeREvent readonly attribute float absoluteValue;readonly attribute boolean computableAsFra