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    • 1. 发明申请
    • Method of downscale decoding MPEG-2 video
    • 低分辨率MPEG-2视频解码方法
    • US20100246676A1
    • 2010-09-30
    • US12591858
    • 2009-12-03
    • Jian-Gen CaoCong-Xiu WangPing XiaoChen Zhang
    • Jian-Gen CaoCong-Xiu WangPing XiaoChen Zhang
    • H04N7/48
    • H04N19/59H04N19/61
    • A method of downscale decoding MPEG-2 video includes an Inverse Discrete Cosine Transformation (DCT) procedure for performing a ½ horizontal downscaling to convert DCT coefficients in a 8×8 array block of the video into a 4×8 array intra-block and performing a ½ vertical downscaling to convert the intra-block into an intra-coded picture having ¼ resolution of the original; and a downscaling motion compensation procedure for performing a motion compensation to the current intra-block to obtain a predictive block having ½ horizontal size of the original, adding the predictive block with a residual block produced by the same method applied to the intra-blocks to obtain a 4×8 array inter-block, and performing a ½ vertical downscaling to the inter-block for outputting a predictive-coded picture and a bidirectional predictive-coded picture having ¼ resolution of the original, so as to simplify the complexity of the decoding computation and enhance the decoding speed.
    • 一种缩减MPEG-2视频解码方法包括一个逆离散余弦变换(DCT)程序,用于执行1/2水平缩小,将视频的8×8阵列块中的DCT系数转换为4×8阵列块内块,并执行 ½垂直缩小,将块内转换为具有原始分辨率为1/4的帧内编码图像; 以及用于对当前帧内执行运动补偿以获得具有原始水平1/2的预测块的缩小运动补偿程序,将预测块与通过应用于块内的相同方法产生的残差块相加 获得一个4×8阵列的块间数据,并且对该块进行1/2的垂直缩小以输出一个预测编码的图象和一个具有1/4分辨率的双向预测编码图象,从而简化了 解码计算,提升解码速度。