1、 Reference numberISO/IEC 14496-4:2004/Amd.6:2005(E)ISO/IEC 2005Information technology Coding of audio-visual objects Part 4: Conformance testing AMENDMENT 6: Advanced Video Coding conformance Technologies de linformation Codage des objets audiovisuels Partie 4: Essai de conformit AMENDEMENT 6: Confo
2、rmit de codage vido avanc International Organization for Standardization (ISO), 2005. All rights reserved. International Electrotechnical Commission (IEC), 2005. All rights reserved. NOT FOR RESALE. Amendment 6:2006 toNational Standard of CanadaCAN/CSA-ISO/IEC 14496-4:06Amendment 6:2005 to Internati
3、onal Standard ISO/IEC 14496-4:2004 has been adopted withoutmodification (IDT) as Amendment 6:2006 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 StrategicSteering Committee on Information Technol
4、ogy and deemed acceptable for use in Canada.December 2006(reaffirmed 2011)ISO/IEC 14496-4:2004/Amd.6:2005(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 be edited unless the typefaces which
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7、t a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2005 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
8、 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 g120 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO/IEC 2005 All
9、 rights reservedAmendment 6:2006 toCAN/CSA-ISO/IEC 14496-4:02ISO/IEC 14496-4:2004/Amd.6:2005(E) ISO/IEC 2005 All rights reserved iiiContents Page Foreword iv Introduction v 10 Advanced Video Coding 1 10.1 Scope . 1 10.2 Normative references . 1 10.3 Definitions . 2 10.4 Abbreviations 2 10.5 Conventi
10、ons 2 10.6 Conformance for ITU-T Rec. H.264 | ISO/IEC 14496-10. 2 Amendment 6:2006 toCAN/CSA-ISO/IEC 14496-4:02ISO/IEC 14496-4:2004/Amd.6:2005(E) iv ISO/IEC 2005 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commissio
11、n) 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
12、 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
13、 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 bo
14、dies 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 iden
15、tifying any or all such patent rights. Amendment 6 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. ISO/IEC 14496-4:2004/Amd.6:2005(E) ISO/IEC 2005 All rights
16、reserved vIntroduction This Recommendation | International Standard establishes conformance test requirements for conformance to ITU-T Rec. H.264 | ISO/IEC 14496-10 Advanced Video Coding. This specification has been jointly developed by ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving
17、Picture Experts Group. It is published as technically-aligned twin text in both organizations ITU-T and ISO/IEC. This document is the text of the ITU-T Rec. H.264.1 | ISO/IEC 14496-4 conformance test of ITU-T Rec. H.264 | ISO/IEC 14496-10 video bitstreams and decoders. This specification is specific
18、ally applied to ITU-T Rec. H.264 | ISO/IEC 14496-10, Advanced Video Coding. The following subclauses specify the normative tests for verifying conformance of ITU-T Rec. H.264 | 14496-10 video bitstreams and video decoders. These normative tests make use of test data (bitstream test suites) provided
19、as an electronic annex to this document, and the reference software decoder specified in ITU-T Rec. H.264.2 | ISO/IEC 14496-5:2001/Amd.6 with source code available in electronic format. ISO/IEC 14496-4:2004/Amd.6:2005(E) ISO/IEC 2005 All rights reserved 1Information technology Coding of audio-visual
20、 objects Part 4: Conformance testing Amendment 6: Advanced Video Coding conformance Add the following after clause 9: 10 Advanced Video Coding 10.1 Scope This clause specifies tests designed to verify whether bitstreams and decoders meet normative requirements specified in ITU-T Rec. H.264 | ISO/IEC
21、 14496-10. An encoder can claim conformance to ITU-T Rec. H.264 | ISO/IEC 14496-10 if the bitstreams that it generates are conforming bitstreams. Characteristics of coded bitstreams and decoders are defined for ITU-T Rec. H.264 | ISO/IEC 14496-10. The characteristics of a bitstream define the subset
22、 of the standard that is exploited in the bitstream. Examples are the applied values or range of the picture size and bit rate parameters. Decoder characteristics define the properties and capabilities of the applied decoding process. The capabilities of a decoder specify which bitstreams the decode
23、r can decode and reconstruct, by defining the subset of the ITU-T Rec. H.264 | ISO/IEC 14496-10 standard that may be exploited in the bitstreams that it will decode. A bitstream can be decoded by a decoder if the characteristics of the bitstream are within the subset of the standard specified by the
24、 decoder capabilities. Procedures are described for testing conformance of bitstreams and decoders to the requirements defined in ITU-T Rec. H.264 | ISO/IEC 14496-10. Given the set of characteristics claimed, the requirements that shall be met are fully determined by ITU-T Rec. H.264 | ISO/IEC 14496
25、-10. This clause summarizes the requirements, cross references them to characteristics, and defines how conformance with them can be tested. Guidelines are given on constructing tests to verify bitstream and decoder conformance. This clause gives guidelines on how to construct bitstream test suites
26、to check or verify decoder conformance. In addition, the test bitstreams implemented according to those guidelines are provided as an electronic annex to this document. 10.2 Normative references 10.2.1 General The following Recommendations and International Standards contain provisions which, throug
27、h reference in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard a
28、re encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of curren
29、tly valid ITU-T Recommendations. ISO/IEC 14496-4:2004/Amd.6:2005(E) 2 ISO/IEC 2005 All rights reserved10.2.2 Identical Recommendations | International Standards None. 10.2.3 Paired Recommendations | International Standards equivalent in technical content ITU-T Recommendation H.264 (2004), Advanced v
30、ideo coding for generic audiovisual services. ISO/IEC 14496-10, Information technology Coding of audiovisual objects Part 10: Advanced video coding. ITU-T Recommendation H.264.2 (2004), Advanced video coding reference software. ISO/IEC 14496-5, Information technology Coding of audiovisual objects Pa
31、rt 5: Reference software. 10.2.4 Additional references None. 10.3 Definitions 10.3.1 For the purposes of this document, the terms, definitions, abbreviations and symbols specified in bitstream: An ITU-T Rec. H.264 | ISO/IEC 14496-10 video bitstream. A bitstream may contain IDR, I, P, B, SI, and SP s
32、lices. 10.3.2 decoder: An ITU-T Rec. H.264 | ISO/IEC 14496-10 video decoder, i.e., an embodiment of the decoding process specified by ITU-T Rec. H.264 | ISO/IEC 14496-10. The decoder does not include the display process, which is outside the scope of this standard. 10.3.3 reference software decoder:
33、 The software decoders contained in ITU-T Rec. H.264.2 | ISO/IEC 14496-5. 10.4 Abbreviations For the purposes of this Recommendation | International Standard, relevant abbreviations are specified in clause 4 of ITU-T Rec. H.264 | ISO/IEC 14496-10. 10.5 Conventions For the purposes of this Recommenda
34、tion | International Standard, relevant conventions are specified in clause 5 in ITU-T Rec.264 | ISO/IEC 14496-10. 10.6 Conformance for ITU-T Rec. H.264 | ISO/IEC 14496-10 10.6.1 Introduction The following subclauses specify the normative tests for verifying conformance of video bitstreams as well a
35、s decoders. Those normative tests make use of test data (bitstream test suites) provided as an electronic annex to this document, and the reference software decoder specified in ITU-T Rec. H.264.2 | ISO/IEC 14496-5 with source code included in electronic format. 10.6.2 Bitstream conformance The bits
36、tream conformance of ITU-T Rec. H.264 | ISO/IEC 14496-10 is specified by subclause C.3 in Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10. ISO/IEC 14496-4:2004/Amd.6:2005(E) ISO/IEC 2005 All rights reserved 310.6.3 Decoder conformance The decoder conformance of ITU-T Rec. H.264 | ISO/IEC 14496-10 is
37、specified by subclause C.4 in Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10. 10.6.4 Procedure to test bitstreams A bitstream that claims conformance with this standard shall pass the following normative test: The bitstream shall be decoded by processing it with the reference software decoder specif
38、ied in ITU-T Rec. H.264.2 | ISO/IEC 14496-5. When processed by the reference software decoder, the bitstream shall not cause any error or non-conformance messages to be reported by the reference software decoder. This test should not be applied to bitstreams that are known to contain errors introduc
39、ed by transmission, as such errors are highly likely to result in bitstreams that lack conformance to ITU-T Rec. H.264 | ISO/IEC 14496-10. Successfully passing the reference software decoder test provides only a strong presumption that the bitstream under test is conforming to the video layer, i.e.
40、that it does indeed meet all the requirements for the video layer (except Annexes C, D and E) specified in ITU-T Rec. H.264 | ISO/IEC 14496-10 that are tested by the reference software decoder. Additional tests may be necessary to more thoroughly check that the bitstream properly meets all the requi
41、rements specified in ITU-T Rec. H.264 | ISO/IEC 14496-10 including the HRD conformance (based on Annexes C, D and E). These complementary tests may be performed using other video bitstream verifiers that perform more complete tests than those implemented by the reference software decoder. ITU-T Rec.
42、 H.264 | ISO/IEC 14496-10 contains several informative recommendations that are not an integral part of that Recommendation | International Standard. When testing a bitstream for conformance, it may also be useful to test whether or not the bitstream follows those recommendations. To check correctne
43、ss of a bitstream, it is necessary to parse the entire bitstream and to extract all the syntactic elements and other values derived from those syntactic elements and used by the decoding process specified in ITU-T Rec. H.264 | ISO/IEC 14496-10. A verifier may not necessarily perform all stages of th
44、e decoding process described in ITU-T Rec. H.264 | ISO/IEC 14496-10 in order to verify bitstream correctness. Many tests can be performed on syntax elements in a state prior to their use in some processing stages. 10.6.5 Procedure to test decoder conformance 10.6.5.1 Conformance bitstreams In this s
45、ubclause, except where stated otherwise, the term “bitstream“ refers to a conforming ITU-T Rec. H.264 | ISO/IEC 14496-10 video bitstream (as defined in this document), that has values of profile_idc, level_idc, and constraint_setX_flag values (where X is a number in the range of 0 to 2, inclusive) c
46、orresponding to a set of specified constraints on a bitstream for which a decoder conforming to a specified profile and level is required in Annex A of ITU-T Rec. H.264 | ISO/IEC 14496-10 to properly perform the decoding process. 10.6.5.2 Contents of bitstream file The conformance bitstreams are inc
47、luded in this specification as an electronic attachment. The following information is included in a single zipped file for each such bitstream. ITU-T Rec. H.264 | ISO/IEC 14496-10 video bitstream Reconstructed pictures or hashes of decoded pictures Short description of the bitstream Trace file (the
48、bitstream in ASCII format) ISO/IEC 14496-4:2004/Amd.6:2005(E) 4 ISO/IEC 2005 All rights reserved10.6.5.3 Requirements on output of the decoding process and timing Two classes of decoder conformance are specified: Output order conformance, and Output timing conformance The output of the decoding proc
49、ess is specified by clause 8 and Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10. For output order conformance, it is a requirement that all of the decoded pictures specified for output in Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10 shall be output by a conforming decoder in the specified order and that the values of the decoded samples in all of the pictures that are output shall be (exactly equal to) the values specified in clause 8 of ITU-T Rec. H.264 | ISO/IEC 14496-10. For output timing conformance, i
