1、 ISO/IEC 2014. CSA Group 2015. All rights reserved. Unauthorized reproduction is strictly prohibited.Amendment 41:2015 (IDT) toCAN/CSA-ISO/IEC 14496-4:06(ISO/IEC 14496-4:2004, IDT)National Standard of CanadaAmendment 41:2015 (IDT) to CAN/CSA-ISO/IEC 14496-4:06 Information technology Coding of audio-
2、visual objects Part 4: Conformance testingAMENDMENT 41: Conformance testing of MVC plus depth extension of AVC(ISO/IEC 14496-4:2004, IDT)Standards Update ServiceAmendment 41:2015 (IDT) to CAN/CSA-ISO/IEC 14496-4:06December 2015Title: Information technology Coding of audio-visual objects Part 4: Conf
3、ormance testingAMENDMENT 41: Conformance testing of MVC plus depth extension of AVCTo register for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2424068.If you requi
4、re assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups policy on privacy at www.csagroup.org/legal to find out how we protect yourpersonal information.Information technology Coding of audio-visual objects Part 4: Conformance testingAMENDMENT 41: Conformance testin
5、g of MVC plus depth extension of AVCTechnologies de linformation Codage des objets audiovisuels Partie 4: Essai de conformitAMENDEMENT 41: Essai de conformit de MVC et extension de profondeur de lAVC ISO/IEC 2014INTERNATIONAL STANDARDISO/IEC14496-4Second edition2004-12-15Reference numberISO/IEC 1449
6、6-4:2004/Amd.41:2014(E)AMENDMENT 412014-08-01ISO/IEC 14496-4:2004/Amd.41:2014(E)ii ISO/IEC 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO/IEC 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means
7、, 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 ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20T
8、el. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgAmendment 41:2015 (IDT) toCAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.41:2014(E)ForewordISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the spe
9、cialized 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
10、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.The proc
11、edures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of document should be noted. This document was drafted in accordance with the editorial ru
12、les of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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. Details of any patent rig
13、hts identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an exp
14、lanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this doc
15、ument is ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.This Amendment establishes conformance test requirements for conformance to ITU-T Rec. H.264 | ISO/IEC 14496-10.In this Amendment, additional text to ITU-T Rec. H.264 |
16、 ISO/IEC 14496-10 is specified for testing the conformance of ITU-T Rec. H.264 | ISO/IEC 14496-10 video decoders including in particular the Multiview Depth High Profiles.The following subclauses specify the normative tests for verifying conformance of ITU-T Rec. H.264 | ISO/IEC 14496-10 video bitst
17、reams and decoders. These normative tests make use of test data (bitstream test suites) provided as an electronic annex to this document, and of the reference software decoder specified in ITU-T Rec. H.264.2 | ISO/IEC 14496-5 with source code available in electronic format. ISO/IEC 2014 All rights r
18、eserved iiiAmendment 41:2015 (IDT) to CAN/CSA-ISO/IEC 14496-4:06Information technology Coding of audio-visual objects Part 4: Conformance testingAMENDMENT 41: Conformance testing of MVC plus depth extension of AVCReplace 10.6.4 with the following:10.6.4 Procedure to test bitstreamsA bitstream that c
19、laims conformance with ITU-T H.264 | ISO/IEC 14496-10 shall pass the following normative test:The bitstream shall be decoded by processing it with the reference software decoder. When processed by the reference software decoder, the bitstream shall not cause any error or non-conformance messages to
20、be reported by the reference software decoder. This test should not be applied to bitstreams that are known to contain errors introduced by transmission, as such errors are highly likely to result in bitstreams that lack conformance to ITU-T H.264 | ISO/IEC 14496-10.Successfully passing the referenc
21、e software decoder test provides only a strong presumption that the bitstream under test is conforming to the video layer, i.e., that it does indeed meet all the requirements for the video layer (except Annexes C, D and E and clauses G.12, H.12 and I.12) specified in ITU-T H.264 | ISO/IEC 14496-10 t
22、hat are tested by the reference software decoder.Additional tests may be necessary to more thoroughly check that the bitstream properly meets all the requirements specified in ITU-T H.264 | ISO/IEC 14496-10 including the hypothetical reference decoder (HRD) conformance (based on Annexes C, D and E a
23、nd clauses G.12, H.12 and I.12). 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 H.264 | ISO/IEC 14496-10 contains several informative recommendations that are not an inte
24、gral 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 correctness of a bitstream, it is necessary to parse the entire bitstream and to extract all the synt
25、ax elements and other values derived from those syntactic elements and used by the decoding process specified in ITU-T H.264 | ISO/IEC 14496-10.A verifier may not necessarily perform all stages of the decoding process specified in ITU-T H.264 | ISO/IEC 14496-10 in order to verify bitstream correctne
26、ss. Many tests can be performed on syntax elements in a state prior to their use in some processing stages.Replace 10.6.5.1 with the following:10.6.5.1 Conformance bitstreamsA bitstream has values of profile_idc, level_idc, and constraint_setX_flag (where X is a number in the range of 0 to 6, inclus
27、ive) corresponding 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, clause G.10, H.10, or I.10 of ITU-T H.264 | ISO/IEC 14496-10 to properly perform the decoding process.ISO/IEC 14496-4:2004/Amd.41:2014(E) ISO/IE
28、C 2014 All rights reserved 1Amendment 41:2015 (IDT) to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.41:2014(E)Replace 10.6.5.3 with the following:10.6.5.3 Requirements on output of the decoding process and timingTwo classes of decoder conformance are specified: output order conformance; and ou
29、tput timing conformance.The output of the decoding process is specified in clauses 8, G.8, G.12, H.8, H.12, I.8, I.12 and Annex C of ITU-T 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, clause G.12, H.12, o
30、r I.12 of ITU-T 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, clause G.8, H.8, or I.8 of ITU-T H.264 | ISO/IEC 144
31、96-10.For output timing conformance, it is a requirement that a conforming decoder shall also output the decoded samples at the rates and times specified in Annex C, clause G.12, H.12, or I.12 of ITU-T H.264 | ISO/IEC 14496-10.The display process, which ordinarily follows the output of the decoding
32、process, is outside the scope of this Recommendation | International Standard.Replace 10.6.5.6 with the following:10.6.5.6 Dynamic tests for output timing conformanceDynamic tests are applied to check that all the decoded samples are output and that the timing of the output of the decoders decoded s
33、amples conforms to the specification of clauses 8, G.8, G.12, H.8, H.12, I.8, I.12; and Annex C of ITU-T H.264 | ISO/IEC 14496-10, and to verify that the HRD models (as specified by the CPB and DPB specification in Annex C, clause G.12, H.12, or I.12 of ITU-T H.264 | ISO/IEC 14496-10) are not violat
34、ed when the bits are delivered at the proper rate.The dynamic test is often easier to perform on a complete decoder system, which may include a systems decoder, a video decoder and a display process. It may be possible to record the output of the display process and to check that display order and t
35、iming of fields or frames are correct at the output of the display process. However, since the display process is not within the normative scope of ITU-T H.264 | ISO/IEC 14496-10, there may be cases where the output of the display process differs in timing or value even though the video decoder is c
36、onforming. In this case, the output of the video decoder itself (before the display process) would need to be captured in order to perform the dynamic tests on the video decoder. In particular the field or frame order and timing shall be correct.If buffering period SEI and picture timing SEI are inc
37、luded in the test bitstream, HRD conformance shall be verified using the values of initial_cpb_removal_delay, initial_cpb_removal_delay_offset, cpb_removal_delay and dpb_removal_delay that are included in the bitstream.If buffering period SEI and picture timing SEI are not included in the bitstream,
38、 the following inferences shall be made to generate the missing parameters: fixed_frame_rate_flag shall be inferred to be 1. low_delay_hrd_flag shall be inferred to be 0. cbr_flag shall be inferred to be 0. The frame rate of the bitstream shall be inferred to be the frame rate value specified in the
39、 corresponding table of clause 6.7, where the bitstream is listed. If this is missing, then a frame rate of either 25 or 30000 1001 can be inferred.2 ISO/IEC 2014 All rights reservedAmendment 41:2015 (IDT) to CAN/CSA-ISO/IEC 14496-4:06ISO/IEC 14496-4:2004/Amd.41:2014(E) time_scale shall be set to 90
40、,000 and the value of num_units_in_tick shall be computed based on field rate (twice the frame rate). The bit rate of the bitstream shall be inferred to be the maximum value for the level specified in Table A-1 in ITU-T H.264 | ISO/IEC 14496-10. CPB and DPB sizes shall be inferred to be the maximum
41、value for the level specified in Table A-1 in ITU-T H.264 | ISO/IEC 14496-10.With the above inferences, the HRD shall be operated as follows. The CPB is filled starting at time t = 0, until it is full, before removal of the first access unit. This means that the initial_cpb_removal_delay shall be in
42、ferred to be equal to the total CPB buffer size divided by the bit rate divided by 90000 (rounded downwards) and initial_cpb_removal_delay_offset shall be inferred to be equal to zero. The first access unit is removed at time t = initial_cpb_removal_delay 90000 and subsequent access units are remove
43、d at intervals based on the frame distance, i.e., 2 * (90000 num_units_in_tick) or the field distance, i.e., (90000 / num_units_in_tick), depending on whether the access unit is coded as a frame picture or field picture. Using these inferences, the CPB will not overflow or underflow and the DPB will
44、 not overflow.In 10.6.5.7, add the following at the end of the sub clause 10.6.5.7:A decoder that conforms to the Multiview Depth High profile at a specific level shall be capable of decoding the specified bitstreams in Table AMD41.1. A decoder that conforms to the Multiview Depth High profile shall
45、 also be capable of decoding all bitstreams that are required to be decoded by a Main, High or Stereo High profile decoder of the same level. In addition to the specified bitstreams in Table AMD41.1, a decoder that conforms to the Multiview Depth High profile shall be capable of decoding the bitstre
46、ams in Tables AMD9-1, AMD9-2 and AMD38.1 that correspond to these requirements.Add the following after the sub clause 10.6.6.34.2:10.6.6.35 Test Bitstreams Multiview Depth High Profile10.6.6.35.1 Test bitstream #MVDDR-1. #MVDDR-2Specification: All slices are coded as I, P or B slices. Only the first
47、 picture is coded as an IDR access unit. Each view component contains only one slice. num_views_minus1 is equal to 1. NumDepthViews is equal to 2. The width and the height of depth view components are half of the texture view components. All NAL units are encapsulated into the byte stream format spe
48、cified in Annex B in ITU-T H.264 | ISO/IEC 14496-10.Functional stage: Decoding of texture view component and depth view component.Purpose: Check that the decoder can properly decode lower resolution depth view component.10.6.6.35.2 Test bitstream #MVDDR-3. #MVDDR-4Specification: All slices are coded
49、 as I, P or B slices. Only the first picture is coded as an IDR access unit. Each view component contains only one slice. num_views_minus1 is equal to 1. NumDepthViews is equal to 2. The width and the height of depth view components are equal to the texture view components. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T H.264 | ISO/IEC 14496-10.Functional stage: Decoding of texture view component and depth view component.Purpose: Check that the decoder can properly decode the same re
