1、Information technology Coding of audio-visual objects Part 5: Reference softwareAMENDMENT 22: Reference software for 3D Graphics CompressionModel (3DGCM)Amendment 22:2010 (IDT) toNational Standard of CanadaCAN/CSA-ISO/IEC 14496-5-06(ISO/IEC 14496-5:2001, IDT)NOT FOR RESALE.PUBLICATION NON DESTINE LA
2、 REVENTE.CSA Standards Update ServiceAmendment 22:2010 toCAN/CSA-ISO/IEC 14496-5-06December 2010Title: Information technology Coding of audio-visual objects Part 5: Reference software AMENDMENT 22: Reference software for 3D Graphics Compression Model (3DGCM)Pagination:7 pages (iii preliminary and 4
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4、il techsupportcsa.ca or call 416-747-2233.Visit CSAs policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.Reference numberISO/IEC 14496-5:2001/Amd.22:2009(E)ISO/IEC 2009INTERNATIONAL STANDARD ISO/IEC14496-5Second edition2001-12-15AMENDMENT 222009-10-15Info
5、rmation technology Coding of audio-visual objects Part 5: Reference software AMENDMENT 22: Reference software for 3D Graphics Compression Model (3DGCM) Technologies de linformation Codage des objets audiovisuels Partie 5: Logiciel de rfrence AMENDEMENT 22: Logiciel de rfrence pour modle de compressi
6、on graphique 3D (3DGCM) ISO/IEC 14496-5:2001/Amd.22:2009(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 are embedded are licensed to and installed on the
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11、 22:2010 to CAN/CSA-ISO/IEC 14496-5-06ISO/IEC 14496-5:2001/Amd.22:2009(E) ISO/IEC 2009 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National
12、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. Oth
13、er 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 rule
14、s 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 appr
15、oval 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 22 to ISO/IEC 14496-5:
16、2001 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Amendment 22:2010 to CAN/CSA-ISO/IEC 14496-5-06ISO/IEC 14496-5:2001/Amd.22:2009(E) ISO/IEC 2009 All rights reserved 1Information
17、technology Coding of audio-visual objects Part 5: Reference software AMENDMENT 22: Reference software for 3D Graphics Compression Model (3DGCM) After Clause 6, add the following new clause: 7 Reference Software for 3D Graphics Compression Model 7.1 Introduction The MPEG-4 Part software (called MP25)
18、 contains two main modules: MP4XMLEncoder and MP4XMLDecoder. The model was implemented three XML based scene graph formats (COLLADA, X3D and XMT) and the elementary streams supported are 3DMC, BBA, IC, FAMC, JPG and JPEG 2000. The MP4XMLEncoder is illustrated in Figure AMD22.1 and consists of three
19、main libraries. (1) libColladaParser, libX3DParser and libXMTParser. Each of these components deals with the appropriate file format (COLLADA, X3D and XMT respectively), parses it, fills the structures with data for mesh, animation, texture and creates a buffer with the rest of the XML file. (2) lib
20、MP4Encoder takes these structures as input, encodes them and creates buffers with standard MPEG-4 elementary streams. (3) libMP4Mux multiplexes the above elementary streams and creates the MP4 file. The MP4XMLDecoder is illustrated in Figure AMD22.2 and consists of three main libraries. (1) MP4toVBL
21、ib parses the mp4 file and outputs buffers with standard mp4 elementary streams. (2) libMP4Decoder decodes the elementary streams in structures for mesh, animation and texture and a buffer for rest of the XML file (3) libMP4toColladaDecoder uses the decoded structures and reconstructs the XML file.
22、Since the scene and the object graph contains information that requires lossless compression, this data is compressed by using GZIP. On the other hand, the nature of such data and its dimension (it only contains structures and some parameters, but not geometry animation or texture) makes inappropria
23、te the development of specific compression schema. Amendment 22:2010 to CAN/CSA-ISO/IEC 14496-5-06ISO/IEC 14496-5:2001/Amd.22:2009(E) 2 ISO/IEC 2009 All rights reservedFigure AMD22.1 MP4XMLEncoder structure Figure AMD22.2 MP4XMLDecoder structure Amendment 22:2010 to CAN/CSA-ISO/IEC 14496-5-06ISO/IEC
24、 14496-5:2001/Amd.22:2009(E) ISO/IEC 2009 All rights reserved 37.2 Folder structure MP4ColladaLibraries libColladaParser COLLADA file format parser MP4ColladaLibraries MP4ClassesLib Classes defining data structures MP4ColladaLibraries libMP4Encoder Set of encoders for mp4 elementary streams MP4Colla
25、daLibraries libMP4Decoder Set of decoders from mp4 elementary streams MP4ColladaLibraries MP4toVBLib MP4 file format parser MP4ColladaLibraries libMP4Mux MP4 file creator MP4ColladaLibrarieslibMP4toColladaDEcoder MP4 to COLLADA file decoder and COLLADA file creator Amendment 22:2010 to CAN/CSA-ISO/I
26、EC 14496-5-06ISO/IEC 14496-5:2001/Amd.22:2009(E) 4 ISO/IEC 2009 All rights reserved7.3 Definition of classes Class Files Description ColladaParser ColladaParser.h, ColladaParser.cpp Load COLLADA file, parse and give at output structures with mesh, animation, texture and rest of collada file MP43DMC
27、MP43DMC.h, MP43DMC.cpp Defines internal structure for mesh dataMP4BoneData MP4Animation.h, MP4Animation.cpp Defines internal structure for one bone MP4Frames MP4Animation.h,MP4Animation.cpp Defines internal structure for one frame MP4AnimationBuff MP4Animation.h, MP4Animation.cpp Define internal str
28、ucture for animation data EncodeMP4Streams EncodeMP4Streams.h, EncodeMP4Streams.cpp Encoder from internal data structure for mesh, animation and texture in 3DMC,BBA and JPG2000 streams. Encoder from xml to gzip COLLADA_rest MPG_IfsQ_C_Ifs : Public MPG_IfsQ_C MPG_IfsQ_C_Ifs.h, MPG_IfsQ_C_Ifs.cpp Clas
29、s used to put data in the 3DMC encoder MPG_IfsQ_E_Ifs : Public MPG_IfsQ_E MPG_IfsQ_E_Ifs.h, MPG_IfsQ_E_Ifs.cpp Class used to get the data from the 3DMC encoder DecodeMP4Streams DecodeMP4Streams.h, DecodeMP4Streams.cpp decoder from in 3DMC,BBA and JPG2000 streams to internal data structure for mesh,
30、animation and texture decoder from gzip for rest of COLLADA Matrix4 matrix4.h, matrix4.cpp Define matrix 4x4 and manipulation with matrices Ostream Ostream.h, ostream.cpp Define method for read/write in stream MP4toVBLib MP4toVBLib.h, MP4toVBLib.cpp Load mp4 file and give as output separate tracks a
31、nd meta data MakeOD MakeOD.h, MakeOD.cpp Class that create Object descriptor for mp4 file SampleData MP4Create.h Class that define data structure for one sample in mp4 file TrackData MP4Create.h Class that define data structure for one track in mp4 file MP4Mux MP4Mux.h, Mux.cpp Create mp4 file from
32、standard mp4 streams MP4toColladaDecode MP4toColladaDecode.h, MP4toColladaDecode.cpp Create COLLADA file from mp4 file Amendment 22:2010 to CAN/CSA-ISO/IEC 14496-5-06ISO/IEC 14496-5:2001/Amd.22:2009(E) ICS 35.040 ISO/IEC 2009 All rights reserved Copyright NoticeThis Amendment to the International St
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