1、 Reference numberISO/IEC 14496-4:2004/Amd.2:2005(E)ISO/IEC 2005Information technology Coding of audio-visual objects Part 4: Conformance testing AMENDMENT 2: MPEG-4 conformance extensions for XMT and media nodes Technologies de linformation Codage des objets audiovisuels Partie 4: Essai de conformit
2、 AMENDEMENT 2: Extensions de conformit pour XMT et nuds mdias International Organization for Standardization (ISO), 2005. All rights reserved. International Electrotechnical Commission (IEC), 2005. All rights reserved. NOT FOR RESALE. Amendment 2:2006 toNational Standard of CanadaCAN/CSA-ISO/IEC 144
3、96-4:06Amendment 2:2005 to International Standard ISO/IEC 14496-4:2004 has been adopted withoutmodification (IDT) as Amendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06. This Amendment was reviewedby the CSA Technical Committee on Information Technology (TCIT) under the jurisdiction of the StrategicSteer
4、ing Committee on Information Technology and deemed acceptable for use in Canada.December 2006(reaffirmed 2011)ISO/IEC 14496-4:2004/Amd.2:2005(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 b
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9、 Web www.iso.org ii ISO/IEC 2005 All rights reservedAmendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) ISO/IEC 2005 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the
10、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 technic
11、al 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. Inte
12、rnational 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 vot
13、ing. 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
14、or all such patent rights. Amendment 2 to ISO/IEC 14496-4:2004 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Amendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.
15、2:2005(E) ISO/IEC 2005 All rights reserved 1Information technology Coding of audio-visual objects Part 4: Conformance testing AMENDMENT 2: MPEG-4 conformance extensions for XMT and media nodes Add the following text at the end of Clause 4. 4.9 Extensible MPEG-4 Textual Format (XMT) 4.9.1 Conformance
16、 Points XMT-A conformance points are: g120g3 The XMT language: XMT-A , g120g3 SDSM and ODSM in mp4 produced from the XMT-A to mp4. XMT-O conformance points are: g120g3 The XMT language : XMT-O, g120g3 SDSM and ODSM in mp4 produced from the XMT-O to mp4, g120g3 Consumer behavior. 4.9.2 Measurement Pr
17、ocedure XMT-A conformance can be measured by the following procedure: 1. Conformance on the format : g131g3 Validate the syntax by the XML Schema parser against the XMT-A Schema g131g3 Encode the format with a conforming encoder to mp4 and check its conformance. 2. Conformance on encoders: (A confor
18、ming encoder, respecting encoding hints, can produce a deterministically coded binary stream for streams defined in MPEG-4 systems). g131g3 Maintain a set of test cases and their corresponding bit streams (mp4 files) generated by the conforming encoder. g131g3 Test encoder generates mp4 files from t
19、he test cases. g131g3 Run smart diff tool in mp4 space against mp4 files pair-wise. SDSM and ODSM in mp4 are conformance points. Note: its not necessarily the same mp4 file. Amendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) 2 ISO/IEC 2005 All rights reservedXMT-O confo
20、rmance can be verified by the following procedure: 1. Conformance on the format: g131g3 Validate the syntax by the XML Schema parser against the XMT-A Schema g131g3 Encode the format with a conforming encoder to mp4 and check its conformance. 2. Conformance on encoders: (consumer behavior is verifie
21、d). g131g3 Maintain a set of test cases and their corresponding bit streams (mp4 files) generated by the conforming encoder. g131g3 Test encoder generates mp4 files from the test cases. g131g3 Play mp4 files pair-wise by the conforming player and check visual differences. g131g3 there should be no f
22、rame difference ideally g131g3 there should be no visual difference practicallyg34.10 MediaSensor 4.10.1 Bitstream conformance 4.10.1.1 Conformance Requirements BIFS streams shall comply with the specifications in Clause 9 of ISO/IEC 14496-1:2001. 4.10.1.2 Measurement procedure Syntax of the BIFS st
23、ream shall meet the requirements of Clause 9 of ISO/IEC 14496-1:2001. 4.10.1.3 Tolerance There is no tolerance for bitstream syntax checking. The diagnosis is pass or fail. 4.10.2 Terminal conformance 4.10.2.1 Conformance Points MediaSensor conformance points are defined in the MediaSensor node by i
24、ts fields. The mediaCurrentTime, streamObjectStartTime, mediaDuration, and info fields may not contain any valid information if the media time of the media in the url field is not known. 4.10.2.2 Measurement Procedure The terminal shall produce formatted output each time a media node that references
25、 the same stream as a MediaSensor node become active. The output is to include: g120g3 The stream object. g120g3 The mediaCurrentTime, streamObjectStartTime, mediaDuration, and info. The times are given in seconds. Further, the terminal shall then output the mediaCurrentTime for each AU in the strea
26、m object. Amendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) ISO/IEC 2005 All rights reserved 34.10.2.3 Output Format The output format is in XML. An example is: . . . . . 4.10.2.4 Tolerance The conformance is passed when the time values reflect the correct media Time,
27、as defined in ISO/IEC 14496-1:2001. 4.11 MediaControl 4.11.1 Bitstream conformance 4.11.1.1 Conformance Requirements BIFS streams shall comply with the specifications in Clause 9 of ISO/IEC 14496-1:2001. 4.11.1.2 Measurement procedure Syntax of the BIFS stream shall meet the requirements of Clause 9
28、 of ISO/IEC 14496-1:2001. 4.11.1.3 Tolerance There is no tolerance for bitstream syntax checking. The diagnosis is pass or fail. 4.11.2 Terminal conformance 4.11.2.1 Conformance Points MediaControl conformance points the following: g120g3 The mediaStartTime and mediaStopTime of the delivered stream
29、object shall conform to the definition of these fields in the node. g120g3 The enabled flag shall be set to true in the last set node and false in all others refering to the same stream. g120g3 The mute field shall cause the rendering to stop. It is important to note that preRoll and mediaSpeed are
30、best effort mechanisms that do not constitute conformance points. Amendment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) 4 ISO/IEC 2005 All rights reserved4.11.2.2 Measurement Procedure The terminal shall produce formatted output each time a media node that references the s
31、ame stream as a MediaSensor node become active. The output is to include: g120g3 The stream object. g120g3 The mediaCurrentTime for the stream for each AU in the stream object. g120g3 The state of the enabled field. g120g3 The state of the mute field. 4.11.2.3 Output Format The output format is in X
32、ML. An example is: . . . . . 4.11.2.4 Tolerance The conformance is passed when the time values reflect the correct media Time, as defined in ISO/IEC 14496-1:2001. The rendering functionality must be observed visually. 4.12 MediaBuffer 4.12.1 Bitstream conformance 4.12.1.1 Conformance Requirements BI
33、FS streams shall comply with the specifications in Clause 9 of ISO/IEC 14496-1:2001 4.12.1.2 Measurement procedure Syntax of the BIFS stream shall meet the requirements of Clause 9 of ISO/IEC 14496-1:2001. 4.12.1.3 Tolerance There is no tolerance for bitstream syntax checking. The diagnosis is pass
34、or fail. 4.12.2 Terminal conformance 4.12.2.1 Conformance Points MediaBuffer conformance points the following: g120g3 The buffer size used to store incoming media samples. g120g3 The ability to substitute media samples from the buffer rather than from the server, when appropriate. Amendment 2:2006 t
35、o CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) ISO/IEC 2005 All rights reserved 54.12.2.2 Measurement Procedure The terminal shall produce formatted output giving the buffer size for stream objects. The terminal shall produce the same output as for MediaControl, but indicate that the
36、 source is from the local buffer when this is the case. 4.12.2.3 Output Format The output format is in XML. An example is: . . . . . 4.12.2.4 Tolerance The conformance is passed when the buffer can provide media samples as needed and is sufficiently large to hold all the media object requested. Amen
37、dment 2:2006 to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.2:2005(E) ICS 35.040 ISO/IEC 2005 All rights reserved Copyright Notice This Amendment to the International Standard contains information copyright protected by the International Organization for Standardization (ISO) and the Internat
38、ional Electrotechnical Commission (IEC). Except as permitted under the laws of Canada, no extract of this Amendment to the International Standard may be reproduced, stored in any retrieval system, or transmitted in any form or by any means, electronic, photocopying, recording, or otherwise, without
39、prior permission from the Standards Council of Canada (SCC). Requests for permission to reproduce this Amendment to the International Standard or parts thereof should be addressed to Manager, Technical Document Centre Standards Council of Canada 270 Albert Street, Suite 200 Ottawa, Ontario K1P 6N7 T
40、he Canadian adoption of this Amendment to the International Standard contains information copyright protected by the Canadian Standards Association. All rights reserved. No part of this adopted Amendment may be reproduced in any form whatsoever without the prior permission of the publisher. ISO/IEC
41、material is reprinted with permission. Requests for permission to reproduce this adopted Amendment or parts thereof should be addressed to Director, Information Products Canadian Standards Association 5060 Spectrum Way, Suite 100 Mississauga, Ontario L4W 5N6 Copyright violators will be prosecuted to the full extent of the law. PRINTEDIN CANADAIMPRIMEAU CANADA
