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    • 63. 发明申请
    • Method and system for generating input file using meta representation on compression of graphics data, and animation framework extension (AFX) coding method and apparatus
    • 用于在图形数据压缩上使用元表示生成输入文件的方法和系统,以及动画框架扩展(AFX)编码方法和装置
    • US20050131930A1
    • 2005-06-16
    • US11001117
    • 2004-12-02
    • Gyeong-ja JangDo-kyoon Kim
    • Gyeong-ja JangDo-kyoon Kim
    • H03M7/30G06F17/00H04N5/91H04N7/12H04N7/24
    • H04N21/44012H03M7/3077H03M7/3079H04N21/23412H04N21/8146H04N21/84H04N21/8543Y10S707/99942
    • Provided are a method and system for generating an input file using meta representation of compression of graphics data, and an animation framework extensions (AFX) encoding method and apparatus. The method of generating an input file includes preparing an extensible MPEG-4 textual (XMT) schema that defines a compression node, encoding parameters, and BitWrapperEncodingHints; preparing an XMT2BIFS style sheet that supports conversion of an input XMT file into a scene file according to the XMT schema, and an XMT2MUX style sheet that supports conversion of the input XMT file into a mux file according to the XMT schema; generating the scene file and the mux file by parsing the input XMT file according to the XMT schema using the XMT2BIFS and XMT2MUX style sheets; determining whether the scene file contains uncompressed graphics data; and compressing the graphics data into a bitstream using the encoding parameters and generating a modified scene file and a modified mux file, when uncompressed graphics data is present in the scene file. Accordingly, it is possible to allow an author to easily express or compress three-dimensional (3D) graphics data using meta representation during authoring of 3D contents and generate an input file that can be input to an MPEG-4 encoder. Therefore, it is possible to visualize 3D graphics data or animation data in real time even at a low network bandwidth.
    • 提供了使用图形数据的压缩的元表示以及动画框架扩展(AFX)编码方法和装置来生成输入文件的方法和系统。 生成输入文件的方法包括准备定义压缩节点,编码参数和BitWrapperEncodingHints的可扩展MPEG-4文本(XMT)模式; 准备一个XMT2BIFS样式表,该表格支持将输入XMT文件转换为根据XMT架构的场景文件;以及XMT2MUX样式表,其支持根据XMT模式将输入的XMT文件转换为多路复用文件; 通过使用XMT2BIFS和XMT2MUX样式表,根据XMT模式解析输入的XMT文件,生成场景文件和mux文件; 确定场景文件是否包含未压缩的图形数据; 以及当所述场景文件中存在未压缩的图形数据时,使用所述编码参数将所述图形数据压缩为比特流并生成修改的场景文件和修改的多路复用文件。 因此,可以允许作者在创建3D内容期间使用元表示容易地表达或压缩三维(3D)图形数据,并且生成可输入到MPEG-4编码器的输入文件。 因此,即使在较低的网络带宽下也可以实时显示3D图形数据或动画数据。