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    • 39. 发明授权
    • Multiple sequence MPEG decoder
    • 多序列MPEG解码器
    • US5812791A
    • 1998-09-22
    • US769346
    • 1996-12-19
    • Steve C. WassermanJames Armand BaldwinGeorge Mitsuoka
    • Steve C. WassermanJames Armand BaldwinGeorge Mitsuoka
    • G06T9/00H04N7/26H04N7/50H04N1/41
    • H04N19/90H04N19/42H04N19/43H04N19/433H04N19/61
    • An MPEG decoding system in a host system, including software instructions for decoding a first portion of MPEG encoded data, including instructions for extracting macroblock data from said MPEG encoded data and for establishing a decoding order for said macroblock data. The system further includes hardware for extracting motion vector data and display data from said macroblocks. An entropy decoder for decoding encoded AC coefficients and DC coefficients in said display data is provided. An inverse quantization unit inversely quantizing said coefficients into a resulting array of decoded AC coefficients is also provided. An de-zig-zag unit scans said array of decoded AC coefficients and DC coefficients in a zig-zag pattern to provide a block of discrete cosine transformed coefficients. A inverse discrete cosine transform unit takes the inverse discrete cosine transform of the block of discrete cosine transformed coefficients to provide a first set of pel data. A motion vector processor decodes the motion vector data to provide a second set of pel data, and a motion compensation unit adds the first and second sets of pel data.
    • 主机系统中的MPEG解码系统,包括用于对MPEG编码数据的第一部分进行解码的软件指令,包括用于从所述MPEG编码数据中提取宏块数据以及建立所述宏块数据的解码顺序的指令。 该系统还包括用于提取运动矢量数据和显示来自所述宏块的数据的硬件。 提供了一种用于对所述显示数据中的经编码的AC系数和DC系数进行解码的熵解码器。 还提供了将所述系数逆量化为经解码的AC系数的结果阵列的逆量化单元。 解字形单元以锯齿形图案扫描解码的AC系数和DC系数的阵列,以提供离散余弦变换系数的块。 逆离散余弦变换单元采用离散余弦变换系数块的逆离散余弦变换来提供第一组像素数据。 运动矢量处理器解码运动矢量数据以提供第二组像素数据,并且运动补偿单元将第一和第二组像素数据相加。