ISO/IEC 14496-27:2009/Amd 2:2011

INTERNATIONAL ISO/IEC
STANDARD 14496-27
First edition
2009-12-15
AMENDMENT 2
2011-02-01
Information technology — Coding of
audio-visual objects —
Part 27:
3D Graphics conformance
AMENDMENT 2: Scalable complexity 3D
mesh coding conformance
Technologies de l'information — Codage des objets audiovisuels —
Partie 27: Conformité aux graphiques 3D
AMENDEMENT 2: Conformité pour encodage de maille en 3D de
complexité atteignable
Reference number
ISO/IEC 14496-27:2009/Amd.2:2011(E)
©
ISO/IEC 2011
ISO/IEC 14496-27:2009/Amd.2:2011(E)
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ii © ISO/IEC 2011 – All rights reserved

ISO/IEC 14496-27:2009/Amd.2:2011(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 2 to ISO/IEC 14496-27:2009 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 2011 – All rights reserved iii

ISO/IEC 14496-27:2009/Amd.2:2011(E)

Information technology — Coding of audio-visual objects —
Part 27:
3D Graphics conformance
AMENDMENT 2: Scalable complexity 3D mesh coding conformance
After 4.2.2.4.4.4, add the following new subclause 4.2.2.5 as follows:
4.2.2.5 Scalable Complexity 3D Mesh Compression(SC3DMC)
4.2.2.5.1 Conformance Points
4.2.2.5.1.1 Covered functionalities
The conformance points for SC3DMC cover
• the compression of different attributes per vertex,
• different compression configurations (QBCR, SVA and TFAN) and possible combinations between,
• arithmetic encoding, 4C and table based BPC encoding,
• scalability with respect to compression and complexity.
The following subclauses specify the normative tests for verifying conformance of SC3DMC compressed
bitstreams and SC3DMC decoder. Those normative tests make use of test data (bitstream test suites).
4.2.2.5.2 Terminal conformance
4.2.2.5.2.1 Conformance Requirements
A compliant decoder shall implement a decoding process that is equivalent to the one specified in ISO/IEC
14496-16:2009/Amd.1 and meets all the general requirements, defined in the document, which apply for the
functionalities considered. The decoder shall decode bitstreams with any options or parameters with values
permitted for the functionalities.
4.2.2.5.2.2 Test Bitstreams
Files:
Model’s properties: each model has coordinate, coordinate index, color, color index, normal, normal index,
texCoord and texCoordIndex per vertex.
In the test name, the prefix XX indicates the input file name. In the files attached to this part of ISO/IEC 14496,
3 Models are considered, cow, dance and eagle.
© ISO/IEC 2011 – All rights reserved 1

ISO/IEC 14496-27:2009/Amd.2:2011(E)
If an input file, cow.wrl, is tested under SVA mode, circular prediction and Bit precision coding
z Test Name: cow_S_Ci_BP
z Bitstream: cow_S_Ci_BP.mp4
z Decoded file: Decoded_cow_S_Ci_BP.wrl

Test Name Parameters Bitstream (.mp4) Decoded file (.wrl)
XX_Q_No_FL QBCR, no prediction, fixed length coding XX_Q_No_FL DECODED_XX_Q_No_FL
QBCR, circular prediction, Exponential Golomb entropy
XX_Q_CD_EG XX _Q_CD_EG DECODED_XX _Q_CD_EG
coding
XX_Q_CD_AC QBCR, circular prediction, Arithmetic coding XX _Q_Cd_AC DECODED_XX _Q_CD_AC
XX_Q_CD_BP QBCR, circular prediction, Bit precision entropy coding XX _Q_CD_BP DECODED_XX _Q_CD_BP
XX_Q_CD_4C QBCR, circular prediction, 4-b
...