Switching distortion metrics during motion estimation
    4.
    发明申请
    Switching distortion metrics during motion estimation 有权
    运动估计过程中的切换失真度量

    公开(公告)号:US20070237226A1

    公开(公告)日:2007-10-11

    申请号:US11400049

    申请日:2006-04-07

    IPC分类号: H04N7/12 H04B1/66

    CPC分类号: H04N19/567

    摘要: Techniques and tools for switching distortion metrics during motion estimation are described. For example, a video encoder determines a distortion metric selection criterion for motion estimation. The criterion can be based on initial results of the motion estimation. To evaluate the criterion, the encoder can compare the criterion to a threshold that depends on a current quantization parameter. The encoder selects between multiple available distortion metrics, which can include a sample-domain distortion metric (e.g., SAD) and a transform-domain distortion metric (e.g., SAHD). The encoder uses the selected distortion metric in the motion estimation. Selectively switching between SAD and SAHD provides rate-distortion performance superior to using only SAD or only SAHD. Moreover, due to the lower complexity of SAD, the computational complexity of motion estimation with SAD-SAHD switching is typically less than motion estimation that always uses SAHD.

    摘要翻译: 描述了在运动估计期间切换失真度量的技术和工具。 例如,视频编码器确定用于运动估计的失真度量选择标准。 标准可以基于运动估计的初始结果。 为了评估标准,编码器可以将标准与​​取决于当前量化参数的阈值进行比较。 编码器在可以包括采样域失真度量(例如SAD)和变换域失真度量(例如,SAHD)的多个可用失真度量之间进行选择。 编码器在运动估计中使用所选择的失真度量。 选择性地切换SAD和SAHD之间的速率失真性能优于仅使用SAD或仅SAHD。 此外,由于SAD的较低的复杂度,SAD-SAHD切换的运动估计的计算复杂度通常小于始终使用SAHD的运动估计。

    Signaling coding and display options in entry point headers
    5.
    发明申请
    Signaling coding and display options in entry point headers 有权
    入口点标题中的信号编码和显示选项

    公开(公告)号:US20050123274A1

    公开(公告)日:2005-06-09

    申请号:US10989845

    申请日:2004-11-15

    IPC分类号: G11C7/00 H04N5/783 H04N7/12

    摘要: A decoder receives an entry point header comprising plural control parameters for an entry point segment corresponding to the entry point header. The entry point header is in an entry point layer of a bitstream comprising plural layers. The decoder decodes the entry point header. The plural control parameters can include various combinations of control parameters such as a pan scan on/off parameter, a reference frame distance on/off parameter, a loop filtering on/off parameter, a fast chroma motion compensation on/off parameter, an extended range motion vector on/off parameter, a variable sized transform on/off parameter, an overlapped transform on/off parameter, a quantization decision parameter, and an extended differential motion vector coding on/off parameter, a broken link parameter, a closed entry parameter, one or more coded picture size parameters, one or more range mapping parameters, a hypothetical reference decoder buffer parameter, and/or other parameter(s).

    摘要翻译: 解码器接收包括与入口点标题相对应的入口点段的多个控制参数的入口点标题。 入口点头在包含多个层的比特流的入口点层中。 解码器解码入口点标题。 多个控制参数可以包括控制参数的各种组合,例如平移扫描开启/关闭参数,参考帧距离开/关参数,循环滤波开/关参数,快速色度运动补偿开/关参数,扩展 范围运动矢量开/关参数,可变大小的变换开/关参数,重叠变换开/关参数,量化决定参数和扩展差分运动矢量编码开/关参数,断链接参数,关闭条目 参数,一个或多个编码图像大小参数,一个或多个范围映射参数,假设参考解码器缓冲器参数和/或其他参数。

    Hybrid motion vector prediction for interlaced forward-predicted fields
    6.
    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。

    Efficient repeat padding for hybrid video sequence with arbitrary video resolution
    7.
    发明申请
    Efficient repeat padding for hybrid video sequence with arbitrary video resolution 有权
    用于具有任意视频分辨率的混合视频序列的高效重复填充

    公开(公告)号:US20060072669A1

    公开(公告)日:2006-04-06

    申请号:US10960384

    申请日:2004-10-06

    摘要: A video codec provides efficient repeat padding of hybrid video sequences having arbitrary video resolution. The video codec repeat pads to expand the active content of pictures in the video sequence out to meet an adaptive vertical macroblock alignment restriction that varies by picture type. For progressive type pictures, the video codec repeats the last row or horizontal boundary edge of the active content. For interlaced type pictures, the video coded repeats the last two rows (last row of each interlaced field) of the active content. This repeat padding differing by picture type provides a better prediction (lower prediction error residual) for macroblocks in following predicted frames whose motion vector points into the padded region.

    摘要翻译: 视频编解码器提供具有任意视频分辨率的混合视频序列的有效重复填充。 视频编解码器重复播放以扩展视频序列中的图像的活动内容,以满足由图像类型变化的自适应垂直宏块对准限制。 对于渐进式图像,视频编解码器重复活动内容的最后一行或水平边界边缘。 对于隔行扫描型图像,视频编码重复活动内容的最后两行(每个隔行字段的最后一行)。 这种不同于图像类型的重复填充对于其运动向量指向填充区域的后续预测帧中的宏块提供了更好的预测(较低的预测误差残差)。