SYSTEM AND METHOD FOR LOW COMPLEXITY MOTION VECTOR DERIVATION
    41.
    发明申请
    SYSTEM AND METHOD FOR LOW COMPLEXITY MOTION VECTOR DERIVATION 审中-公开
    用于低复杂运动矢量衍生的系统和方法

    公开(公告)号:US20120294370A1

    公开(公告)日:2012-11-22

    申请号:US13575233

    申请日:2011-04-01

    IPC分类号: H04N7/32

    摘要: A system and method for performing candidate-based decoder-side motion vector determination (DMVD). Candidate motion vectors (MVs) may be rounded to the nearest whole or integer pixel. The rounded candidate MV having the best sum of absolute differences (SAD) may be identified. This may be used as the final MV. Alternatively, the un-rounded MV corresponding to this rounded candidate MV may be used as the final MV. Alternatively, a small range integer search may be performed around the chosen rounded candidate MV, and the best integer pixel in the search area may be identified and used to define the final MV. Alternatively, an intermediate MV may be chosen, where this MV is intermediate between the chosen rounded candidate MV and the MV corresponding to the best integer pixel in the search area.

    摘要翻译: 一种用于执行基于候选的解码器侧运动矢量确定(DMVD)的系统和方法。 候选运动矢量(MV)可以舍入到最接近的整数或整数像素。 可以识别具有最佳绝对差(SAD)之和的舍入候选MV。 这可以用作最终的MV。 或者,可以将与该舍入候选MV相对应的未舍入的MV用作最终MV。 或者,可以围绕所选择的舍入候选MV执行小范围整数搜索,并且可以识别搜索区域中的最佳整数像素并用于定义最终MV。 或者,可以选择中间MV,其中该MV在所选择的舍入候选MV和对应于搜索区域中的最佳整数像素的MV之间。

    Methods and systems to estimate motion based on reconstructed reference frames at a video decoder
    42.
    发明授权
    Methods and systems to estimate motion based on reconstructed reference frames at a video decoder 有权
    基于视频解码器上重建的参考帧估计运动的方法和系统

    公开(公告)号:US08917769B2

    公开(公告)日:2014-12-23

    申请号:US12566823

    申请日:2009-09-25

    摘要: 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.

    摘要翻译: 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。

    LOW MEMORY ACCESS MOTION VECTOR DERIVATION
    43.
    发明申请
    LOW MEMORY ACCESS MOTION VECTOR DERIVATION 审中-公开
    低存储器访问运动矢量派生

    公开(公告)号:US20130287111A1

    公开(公告)日:2013-10-31

    申请号:US13976778

    申请日:2011-06-29

    IPC分类号: H04N7/36

    摘要: Systems, devices and methods for performing low memory access candidate-based decoder-side motion vector determination (DMVD) are described. The number of candidate motion vectors (MVs) searched may be confined by limiting the range of pixels associated with candidate MVs to a pre-defined window. Reference windows may then be loaded into memory only once for both DMVD and motion compensation (MC) processing. Reference window size may be adapted to different PU sizes. Further, various schemes are described for determining reference window positions.

    摘要翻译: 描述用于执行低存储器访问候选的解码器侧运动矢量确定(DMVD)的系统,设备和方法。 搜索的候选运动矢量(MV)的数量可以通过将与候选MV相关联的像素的范围限制为预定窗口来限制。 然后,对于DMVD和运动补偿(MC)处理,参考窗口可以仅被加载到存储器中一次。 参考窗口尺寸可以适应不同的PU尺寸。 此外,描述了用于确定参考窗口位置的各种方案。

    SYSTEM AND METHOD FOR ENHANCED DMVD PROCESSING
    44.
    发明申请
    SYSTEM AND METHOD FOR ENHANCED DMVD PROCESSING 有权
    用于增强DMVD处理的系统和方法

    公开(公告)号:US20140146890A1

    公开(公告)日:2014-05-29

    申请号:US13996582

    申请日:2010-12-21

    IPC分类号: H04N19/51 H04N19/436

    摘要: To let decoder side motion vector derivation (DMVD) coded blocks be decoded in parallel, decoder side motion estimation (ME) dependency on spatially neighboring reconstructed pixels can be removed. Mirror ME and projective ME are only performed on two reference pictures, and the spatially neighboring reconstructed pixels will not be considered in the measurement metric of the decoder side ME. Also, at a video decoder, motion estimation for a target block in a current picture can be performed by calculating a motion vector for a spatially neighboring DMVD block, using the calculated motion vector to predict motion vectors of neighboring blocks of the DMVD block, and decoding the DMVD block and the target block in parallel. In addition, determining a best motion vector for a target block in a current picture can be performed by searching only candidate motion vectors in a search window, wherein candidate motion vectors are derived from a small range motion search around motion vectors of neighboring blocks.

    摘要翻译: 为了使解码器侧运动矢量导出(DMVD)编码块并行解码,可以去除对空间相邻的重建像素的解码器侧运动估计(ME)依赖性。 镜像ME和投影ME仅在两个参考图像上执行,并且在解码器侧ME的测量度量中将不考虑空间相邻的重建像素。 此外,在视频解码器中,可以使用所计算的运动矢量来计算当前图像中的目标块的运动估计,以通过计算空间相邻的DMVD块的运动矢量来预测DMVD块的相邻块的运动矢量,以及 对DMVD块和目标块进行并行解码。 此外,通过仅在搜索窗口中仅搜索候选运动矢量来执行确定当前图片中的目标块的最佳运动矢量,其中,从围绕相邻块的运动矢量的小范围运动搜索导出候选运动矢量。

    Selective Local Adaptive Wiener Filter for Video Coding and Decoding
    45.
    发明申请
    Selective Local Adaptive Wiener Filter for Video Coding and Decoding 有权
    用于视频编码和解码的选择性局部自适应维纳滤波器

    公开(公告)号:US20100254448A1

    公开(公告)日:2010-10-07

    申请号:US12418804

    申请日:2009-04-06

    IPC分类号: H04N7/12

    摘要: An adaptive Wiener filter may be applied to improve coding efficiency because of information lost during quantization of the video encoding process. The Wiener filter may be selectively applied globally to an entire picture or locally to portions of the picture. Histogram segmentation may be used to select pixels for Wiener filtering in some embodiments. The Wiener filter may be adaptively applied to histogram bins, improving coding efficiency in some cases.

    摘要翻译: 可以应用自适应维纳滤波器来提高编码效率,因为在视频编码处理的量化期间信息丢失。 Wiener滤波器可以全局地选择性地应用于整个图像,或者局部地应用于图像的一部分。 在一些实施例中,直方图分割可用于选择维纳滤波的像素。 维纳滤波器可以自适应地应用于直方图盒,在一些情况下提高编码效率。