1、 Reference numberISO/IEC 21000-9:2005/Amd.1:2008(E)ISO/IEC 2008 INTERNATIONAL STANDARD ISO/IEC21000-9First edition2005-07-01AMENDMENT 12008-10-01Information technology Multimedia framework(MPEG-21)Part 9:File Format AMENDMENT 1:MIME type registration Technologies de linformation Cadre multimdia(MPEG
2、-21)Partie 9:Format de fichier AMENDEMENT 1:Enregistrement de type MIME ISO/IEC 21000-9:2005/Amd.1:2008(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 e
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5、elating to it is found,please inform the Central Secretariat at the address given below.COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2008 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 ph
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7、rland ii ISO/IEC 2008 All rights reserved ISO/IEC 21000-9:2005/Amd.1:2008(E)ISO/IEC 2008 All rights reserved iii Foreword ISO(the International Organization for Standardization)and IEC(the International Electrotechnical Commission)form the specialized system for worldwide standardization.National bo
8、dies 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 i
9、nternational 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
10、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 leas
11、t 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 1 to ISO/IEC 21000-9:2005 was prepared by
12、Joint Technical Committee ISO/IEC JTC 1,Information technology,Subcommittee SC 29,Coding of audio,picture,multimedia and hypermedia information.ISO/IEC 21000-9:2005/Amd.1:2008(E)ISO/IEC 2008 All rights reserved 1 Information technology Multimedia framework(MPEG-21)Part 9:File Format AMENDMENT 1:MIME
13、 type registration After Annex C add the following new annex:Annex D(normative)MIME type registration MIME media type name:application MIME subtype name:mp21 Required parameters:none Optional parameters:none Encoding considerations:base64 is generally preferred;files are binary and should be transmi
14、tted without CR/LF conversion,7-bit stripping,etc.Note that although files conforming to ISO/IEC 21000-2 are textual XML the mp21 file which contains it is binary.Security considerations:It is possible to inject non-compliant MPEG streams(Audio,Video,and Systems)in the MP21 file to overload the rece
15、iver/decoders buffers.This might compromise the functionality of the receiver or even crash it.An MP21 file supports the storage of stream types,including commands that are executed on the terminal such as Digital Item Methods based on ECMASCRIPT for which also bindings to Java(TM)and C+exists.It is
16、 possible to use one or more of the above in a manner non-compliant to MPEG to crash the receiver or temporarily make it unavailable.Authentication mechanisms can be used to validate of the sender and the data to prevent security problems due to non-compliant malignant MP21 files.Interoperability considerations:A number of interoperating implementations exist within the ISO/IEC 21000 community,and that community has reference software for reading and writing the file format.Published specificati
