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    Please use this identifier to cite or link to this item: http://chur.chu.edu.tw/handle/987654321/31677


    Title: 用於H.264的快速inter與intra模式決策演算法
    Authors: 鄭芳炫
    Cheng, Fang Hsuan
    Contributors: 資訊工程學系
    Computer Science & Information Engineering
    Keywords: 可變區塊大小;模式決策;移動向量預測;索貝法;濾波器法
    Variable block size;Mode decision;Motion vector prediction;Sobel method;Filter method
    Date: 2010
    Issue Date: 2014-06-27 01:34:45 (UTC+8)
    Abstract: 在過去移動預估，使用固定區塊大小16*16 做預估，因為影片序列特性上的不同，會造成移動向
    量預估不夠精確。H.264/AVC 提出可變區塊大小模式來解決此問題。此模式分成七種不同區塊大小，
    可以因應不同的影片序列特性，根據不同特性選擇不同的模式做預估，因此精確度會提高。但因為每
    種模式都要做判斷，最後由程式決定出一個最佳的模式，所以複雜度相對提高。為了改善複雜度問題，
    過去針對移動預估提出以下幾種方式，包含邊緣計算之Sobel 方式、DCT 計算方式、移動向量分割與
    合併的演算法、2*2 濾波器計算不同
    In past motion vector estimation, constant 16*16 block size is usually used for prediction. Due to
    different characteristics of video sequences, fixed block size is not adequate to predict motion vector
    accurately. H.264/AVC proposes the mode of variable
    Appears in Collections:[Department of Computer Science and Information Engineering] Journal Articles

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