公开(公告)号：US20080181310A1

公开(公告)日：2008-07-31

申请号：US12018901

申请日：2008-01-24

申请人： Kwang-Pyo CHOI ,  Young-Hun Joo ,  Bong-Gon Kim ,  Yun-Je Oh ,  Byeungwoo Jeon ,  Bongsoo Jung

发明人： Kwang-Pyo CHOI ,  Young-Hun Joo ,  Bong-Gon Kim ,  Yun-Je Oh ,  Byeungwoo Jeon ,  Bongsoo Jung

IPC分类号： H04N7/26

CPC分类号： H04N19/57 ,  H04N19/433 ,  H04N19/533 ,  H04N19/557 ,  H04N19/56

摘要： A motion search method and apparatus for minimizing an off-chip memory access to reduce cycles for predicting a motion vector. A sum of absolute differences (SAD) calculation processing is performed, while an off-chip memory is accessed using Direct Memory Access (DMA). A position of a current macro block is determined if a frame is input and the length of a horizontal search line is set according to adjacent motion vectors and predetermined external parameters. The SADs are calculated by calculating medians of the adjacent motion vectors as a predictive motion vector, setting a vertical direction value of the predictive motion vector as an initial search line, and sequentially searching at least one horizontal search line, and determining a position of a minimum SAD from the at least one horizontal search line. The minimum SAD position is selected as a final motion vector.

摘要翻译： 一种用于最小化片外存储器访问以减少用于预测运动矢量的循环的运动搜索方法和装置。 执行绝对差（SAD）计算处理的总和，而使用直接存储器访问（DMA）访问片外存储器。 如果帧被输入并且根据相邻运动矢量和预定的外部参数来设置水平搜索线的长度，则确定当前宏块的位置。 通过计算相邻运动矢量的中值作为预测运动矢量来计算SAD，将预测运动矢量的垂直方向值设定为初始搜索线，并依次搜索至少一条水平搜索线，并且确定 来自至少一个水平搜索线的最小SAD。 选择最小SAD位置作为最终运动矢量。