Hybrid motion vector prediction for interlaced forward-predicted fields
    32.
    发明申请
    Hybrid motion vector prediction for interlaced forward-predicted fields 有权
    用于交错前向预测场的混合运动矢量预测

    公开(公告)号:US20050053142A1

    公开(公告)日:2005-03-10

    申请号:US10933956

    申请日:2004-09-02

    摘要: Techniques and tools for hybrid motion vector prediction for interlaced forward-predicted fields are described. For example, a video decoder determines an initial motion vector predictor for a motion vector of an interlaced forward-predicted field. The decoder then checks a variation condition based at least in part on a predictor polarity selection (e.g., same or opposite), the initial motion vector predictor, and neighbor motion vectors. If the variation condition is satisfied, the decoder uses one of the neighbor motion vectors as a final motion vector predictor. Otherwise, the decoder uses the initial motion vector predictor as the final motion vector predictor. A video encoder performs corresponding processing.

    摘要翻译: 描述了用于隔行正向预测场的混合运动矢量预测的技术和工具。 例如,视频解码器确定用于隔行扫描前向预测场的运动矢量的初始运动矢量预测器。 解码器至少部分地基于预测器极性选择(例如相同或相反),初始运动矢量预测器和相邻运动矢量来检查变化条件。 如果满足变化条件,则解码器使用相邻运动矢量之一作为最终运动矢量预测器。 否则,解码器使用初始运动矢量预测器作为最终运动矢量预测器。 视频编码器执行相应的处理。

    Scan patterns for progressive video content
    37.
    发明申请
    Scan patterns for progressive video content 有权
    逐行视频内容的扫描模式

    公开(公告)号:US20050068208A1

    公开(公告)日:2005-03-31

    申请号:US10989594

    申请日:2004-11-15

    摘要: Tools and techniques for applying scan patterns during encoding and decoding of progressive video are described. For example, a video decoder entropy decodes transform coefficients in a one-dimensional array and scans the transform coefficients into a block according to a scan pattern. The block is 8×4, and the scan pattern biases the vertical direction for at least the lowest frequency AC coefficients in the horizontal and vertical directions. Or, the block is 4×8, and the scan pattern biases the horizontal direction for at least the lowest frequency AC coefficients in the horizontal and vertical directions. A corresponding video encoder applies the scan patterns to scan transform coefficients from blocks to one-dimensional arrays.

    摘要翻译: 描述了在逐行视频的编码和解码期间应用扫描模式的工具和技术。 例如,视频解码器熵解码一维阵列中的变换系数,并根据扫描模式将变换系数扫描成块。 该块为8×4,并且扫描图案偏置垂直方向至少在水平和垂直方向上的最低频率AC系数。 或者,块是4×8,并且扫描图案在水平和垂直方向上至少对最低频率AC系数偏置水平方向。 相应的视频编码器应用扫描图案来扫描从块到一维阵列的变换系数。