METHODS AND SYSTEMS FOR MOTION VECTOR DERIVATION AT A VIDEO DECODER
    71.
    发明申请
    METHODS AND SYSTEMS FOR MOTION VECTOR DERIVATION AT A VIDEO DECODER 审中-公开
    在视频解码器上运动矢量派生的方法和系统

    公开(公告)号:US20150350667A1

    公开(公告)日:2015-12-03

    申请号:US14737437

    申请日:2015-06-11

    CPC classification number: H04N19/52 H04N19/44 H04N19/51 H04N19/56 H04N19/577

    Abstract: Method and apparatus for deriving a motion vector at a video decoder. A block-based motion vector may be produced at the video decoder by utilizing motion estimation among available pixels relative to blocks in one or more reference frames. The available pixels could be, for example, spatially neighboring blocks in the sequential scan coding order of a current frame, blocks in a previously decoded frame, or blocks in a downsampled frame in a lower pyramid when layered coding has been used.

    Abstract translation: 用于在视频解码器处导出运动矢量的方法和装置。 可以通过利用可用像素中相对于一个或多个参考帧中的块的运动估计在视频解码器处产生基于块的运动矢量。 当使用分层编码时,可用像素可以是例如当前帧的顺序扫描编码顺序的空间相邻块,先前解码的帧中的块,或者在使用分层编码时在较低金字塔中的下采样帧中的块。

    METHODS AND SYSTEMS TO ESTIMATE MOTION BASED ON RECONSTRUCTED REFERENCE FRAMES AT A VIDEO DECODER
    72.
    发明申请
    METHODS AND SYSTEMS TO ESTIMATE MOTION BASED ON RECONSTRUCTED REFERENCE FRAMES AT A VIDEO DECODER 审中-公开
    基于视频解码器上重构的参考帧估计运动的方法和系统

    公开(公告)号:US20150304682A1

    公开(公告)日:2015-10-22

    申请号:US14578802

    申请日:2014-12-22

    Abstract: Methods and systems to apply motion estimation (ME) based on reconstructed reference pictures in a B frame or in a P frame at a video decoder. For a P frame, projective ME may be performed to obtain a motion vector (MV) for a current input block. In a B frame, both projective ME and mirror ME may be performed to obtain an MV for the current input block. The ME process can be performed on sub-partitions of the input block, which may reduce the prediction error without increasing the amount of MV information in the bitstream. Decoder-side ME can be applied for the prediction of existing inter frame coding modes, and traditional ME or the decoder-side ME can be adaptively selected to predict a coding mode based on a rate distribution optimization (RDO) criterion.

    Abstract translation: 基于在B帧或视频解码器的P帧中的重建参考图像应用运动估计(ME)的方法和系统。 对于P帧,可以执行投影ME以获得当前输入块的运动矢量(MV)。 在B帧中,可以执行投射ME和镜ME两者以获得当前输入块的MV。 可以在输入块的子分区上执行ME处理,这可以在不增加比特流中的MV信息的量的情况下减少预测误差。 解码器端ME可以应用于现有的帧间编码模式的预测,并且传统的ME或解码器侧的ME可以被自适应地选择以基于速率分布优化(RDO)准则来预测编码模式。

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