ISO/IEC 14496-4:2004/Amd 6:2005
(Amendment)Information technology — Coding of audio-visual objects — Part 4: Conformance testing — Amendment 6: Advanced Video Coding conformance
Information technology — Coding of audio-visual objects — Part 4: Conformance testing — Amendment 6: Advanced Video Coding conformance
Technologies de l'information — Codage des objets audiovisuels — Partie 4: Essai de conformité — Amendement 6: Conformité de codage vidéo avancé
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INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 6
2005-09-01
Information technology — Coding of
audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 6: Advanced Video Coding
conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 6: Conformité de codage vidéo avancé
Reference number
ISO/IEC 14496-4:2004/Amd.6:2005(E)
©
ISO/IEC 2005
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
Contents 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 Conventions. 2
10.6 Conformance for ITU-T Rec. H.264 | ISO/IEC 14496-10. 2
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
Foreword
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 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.
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
Introduction
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 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 specifically 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 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.
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
Information technology — Coding of audio-visual 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 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 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 decoder 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 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 14496-10. 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 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, through 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 are 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 currently valid ITU-T Recommendations.
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
10.2.2 Identical Recommendations | International Standards
– None.
10.2.3 Paired Recommendations | International Standards equivalent in technical content
– ITU-T Recommendation H.264 (2004), Advanced video 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 – Part 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 slices.
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: 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 Recommendation | 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
as 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 bitstream 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.
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
10.6.3 Decoder conformance
The decoder conformance of ITU-T Rec. H.264 | ISO/IEC 14496-10 is 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 specified 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 introduced 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. 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
requirements 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. 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 correctness 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 the 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 subclause, 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)
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 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 included 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 bitstream in ASCII format)
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
10.6.5.3 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 process 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, it is a requirement that a conforming decoder shall also output the
reconstructed samples at the rates and times specified in Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10.
The display process, which ordinarily follows the output of the decoding process, is outside the scope of this
Recommendation | International Standard.
10.6.5.4 Recommendations (informative)
In addition to the requirements, it is desirable that conforming decoders implement various informative
recommendations defined in ITU-T Rec. H.264 | ISO/IEC 14496-10 that are not an integral part of that
Recommendation | International Standard. This subclause lists some of these recommendations.
It is recommended that a conforming decoder be able to resume the decoding process as soon as possible
after the loss or corruption of part of a bitstream. In most cases it is possible to resume decoding at the next
start code or slice header. It is recommended that a conforming decoder be able to perform concealment for
the macroblocks or video packets for which all the coded data has not been received.
10.6.5.5 Static tests for output order conformance
Static tests of a video decoder require testing of the reconstructed samples. This subclause will explain how
this test can be accomplished when the reconstructed samples at the output of the decoding process are
available. It may not be possible to perform this type of test with a production decoder (due to the lack of an
appropriate accessible interface in the design at which to perform the test). In that case this test should be
performed by the manufacturer during the design and development phase. Static tests are used for testing the
decoding process. The test will check that the values of the samples reconstructed by the decoder under test
shall be identical to the values of the reference samples attached to the bitstream file, or shall be identical to
the values of the samples reconstructed by the reference decoder in cases where the values of the samples
are not attached to the bitstream file. When a hash of the values of the samples of the decoded pictures is
attached to the bitstream file, a corresponding hash operation performed on the values of the samples of the
decoded pictures produced by the decoder under test shall produce the same results.
10.6.5.6 Dynamic tests for output timing conformance
Dynamic tests are applied to check that all the reconstructed samples are output and that the timing of the
output of the decoder's reconstructed samples conforms to the specification of clause 8 and Annex C of ITU-T
Rec. H.264 | ISO/IEC 14496-10, and to verify that the HRD models (as defined by the CPB and DPB
specification in Annex C of ITU-T Rec. H.264 | ISO/IEC 14496-10) are not violated 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 timing 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 Rec. 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
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
decoder is conforming. 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 included 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, 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 stream shall be inferred to be the frame rate value specified in Table
AMD9-1. If this is missing, then a frame rate of either 25 or 30000 ÷ 1001 can be inferred.
– time_scale shall be set to 90,000 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 defined in
Table A-1 in ITU-T Rec. H.264 | ISO/IEC 14496-10.
– CPB and DPB sizes shall be inferred to be the maximum value for the level defined in Table A-1
in ITU-T Rec. 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 inferred 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 removed at intervals based on the frame distance, i.e. cpb_removal_delay = 2 *
( 90000 ÷ num_units_in_tick ) or the field distance i.e. cpb_removal_delay = ( 90000 /
num_units_in_tick ), depending 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 not overflow.
10.6.5.7 Decoder conformance test of a particular profile-and-level
In order for a decoder of a particular profile-and-level to claim output order conformance to the standard as
described by this specification, the decoder shall successfully pass the static test defined in subclause
10.6.5.5 with all the bitstreams of the normative test suite specified for testing decoders of this particular
profile-and-level.
In order for a decoder of a particular profile and level to claim output timing conformance to the standard as
described by this specification, the decoder shall successfully pass both the static test defined in subclause
10.6.5.5 and the dynamic test defined in subclause 10.6.5.6 with all the bitstreams of the normative test suite
specified for testing decoders of this particular profile-and-level. Table AMD9-1 define the normative test
suites for each profile-and-level combination. The test suite for a particular profile-and-level combination is the
list of bitstreams that are marked with an ‘X’ in the column corresponding to that profile-and-level combination.
‘X’ indicates that the bitstream is designed to test both the dynamic and static conformance of the decoder.
The bitstream specification indicates the test bitstream specification used for each bitstream.
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
10.6.6 Specification of the test bitstreams
Some characteristics of each bitstream listed in Table AMD9-1 are described in the subclauses of this
subclause. In Table AMD9-1, the value "29.97" shall be interpreted as an approximation of an exact value of
30000 ÷ 1001.
10.6.6.1 Test Bitstreams – General
10.6.6.1.1 Test bitstream #AVCNL-1, #AVCNL-2
Specification: All slices are coded as I slices. Each picture contains only one slice.
disable_deblocking_filter_idc is equal to 1, specifying disabling of the deblocking filter process.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 0. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of I slices.
Purpose: Check that the decoder can properly decode I slices.
10.6.6.1.2 Test bitstream #AVCNL-3, #AVCNL-4
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
disable_deblocking_filter_idc is equal to 1, specifying disabling of the deblocking filter process.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 0. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of P slices.
Purpose: Check that the decoder can properly decode P slices.
10.6.6.1.3 Test bitstream #AVCBA-1
Specification: All slices are coded as I slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 0. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of I slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode I slices with the deblocking filter process enabled.
10.6.6.1.4 Test bitstream #AVCBA-2
Specification: All slices are coded as I slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 2. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of I slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode I slices with the deblocking filter process enabled.
10.6.6.1.5 Test bitstream #AVCBA-3
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 0. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
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Functional stage: Decoding of P slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode P slice with the deblocking filter process enabled.
10.6.6.1.6 Test bitstream #AVCBA-4
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 2. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of P slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode P slices with the deblocking filter process enabled.
10.6.6.1.7 Test bitstream #AVCBA-5, #AVCBA-6
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 0. All NAL units are encapsulated into the byte stream format specified in Annex B in ITU-T
Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of P slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode P slices with the deblocking filter process enabled.
10.6.6.1.8 Test bitstream #AVCBA-7, #AVCBA-8
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 2. Macroblock/sub-macroblock partition size is limited to 8x8 and above. All NAL units are encapsulated
into the byte stream format specified in Annex B in ITU-T Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of P slices with the deblocking filter process enabled.
Purpose: Check that the decoder can properly decode P slices with the deblocking filter process enabled.
10.6.6.1.9 Test bitstream #AVCMQ-1
Specification: All slices are coded as I slices. Each picture contains only one slice.
disable_deblocking_filter_idc is equal to 1, specifying disabling of the deblocking filter process.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 1. mb_qp_delta is equal to a non-zero value to change the quantizer scale at each MB. All NAL units are
encapsulated into the byte stream format specified in Annex B in ITU-T Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of I slices with mb_qp_delta not equal to 0.
Purpose: Check that the decoder can properly decode I slices with mb_qp_delta not equal to 0.
10.6.6.1.10 Test bitstream #AVCMQ-2
Specification: All slices are coded as I or P slices. Each picture contains only one slice.
disable_deblocking_filter_idc is equal to 1, specifying disabling of the deblocking filter process.
entropy_coding_mode_flag is equal to 0, specifying the CAVLC parsing process. pic_order_cnt_type is equal
to 1. mb_qp_delta is equal to a non-zero value to change the quantizer scale at each MB. All NAL units are
encapsulated into the byte stream format specified in Annex B in ITU-T Rec. H.264 | ISO/IEC 14496-10.
Functional stage: Decoding of P slices with mb_qp_delta not equal to 0.
Purpose: Check that the decoder can properly decode P slices with mb_qp_delta not equal to 0.
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INTERNATIONAL ISO/IEC
STANDARD 14496-4
Second edition
2004-12-15
AMENDMENT 6
2005-09-01
Information technology — Coding
of audio-visual objects —
Part 4:
Conformance testing
AMENDMENT 6: Advanced Video Coding
conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
AMENDEMENT 6: Conformité de codage vidéo avancé
Reference number
ISO/IEC 14496-4:2004/Amd.6:2005(E)
©
ISO/IEC 2005
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ISO/IEC 14496-4:2004/Amd.6:2005(E)
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