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    • 55. 发明申请
    • Method and apparatus for encoding and decoding key value data of coordinate interpolator
    • 用于对坐标插值器的键值数据进行编码和解码的方法和装置
    • US20070183674A1
    • 2007-08-09
    • US11717197
    • 2007-03-13
    • Shin-jun LeeSeok-yoon JungEuee-seon JangSang-oak WooMahn-jin HanDo-kyoon KimGyeong-ja Jang
    • Shin-jun LeeSeok-yoon JungEuee-seon JangSang-oak WooMahn-jin HanDo-kyoon KimGyeong-ja Jang
    • G06K9/36
    • H04N19/124H04N19/90H04N19/94
    • A method and an apparatus for encoding/decoding key value data of a coordinate interpolator used in a three-dimensional graphic animation are provided. The apparatus for encoding key value data of a coordinate interpolator representing the position of each vertex of an object using coordinates of each of the vertices including x, y, and z components includes a quantizer, which quantizes a coordinate interpolator input thereinto with predetermined quantization bits, a DPCM processor, which performs a DPCM operation of a predetermined mode on each component of each vertex of the quantized coordinate interpolator and thus generates differential data based on the temporal variation of the coordinates of each of the vertices and differential data based on the spatial variation of the coordinates of each of the vertices, a dictionary encoder, which generates symbols representing the differential data of each of the components of each of the vertices and the mode of a DPCM operation which has been performed on the differential data and position indexes indicating the positions of the symbols, and an entropy encoder, which entropy-encodes the symbols and the position indexes.
    • 提供了一种用于对三维图形动画中使用的坐标插值器的键值数据进行编码/解码的方法和装置。 用于使用包括x,y和z分量的每个顶点的坐标来表示对象的每个顶点的位置的坐标插值器的键值数据的装置包括量化器,其量化其中具有预定量化位的坐标插值器 DPCM处理器,其在量化坐标插值器的每个顶点的每个分量上执行预定模式的DPCM操作,并且因此基于空间中的每个顶点和差分数据的坐标的时间变化生成差分数据 每个顶点的坐标的变化,字典编码器,其生成表示每个顶点的每个分量的差分数据的符号以及对差分数据执行的DPCM操作的模式和指示 符号的位置和熵编码器,熵编码 符号和位置指标。
    • 60. 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。