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    • 8. 发明授权
    • Luma-based chroma intra prediction
    • 基于亮度的色度帧内预测
    • US08724711B2
    • 2014-05-13
    • US13512992
    • 2011-07-12
    • Lidong XuYu HanYi-Jen ChiuWenhao Zhang
    • Lidong XuYu HanYi-Jen ChiuWenhao Zhang
    • H04N7/12
    • H04N19/00569H04N19/105H04N19/11H04N19/186H04N19/61H04N19/82
    • Systems, devices and methods for performing luma-based chroma ultra prediction are described. Down-sample filters may be applied to luma values of luma pixel positions to generate reconstructed luma values for chroma pixel positions in a prediction unit of an intra frame. The down-sampled reconstructed luma values may then be used to predict chroma values for the chroma pixel positions. In some implementations, a reconstructed luma value of a chroma position may be used to predict that position's chroma value. In other implementations, reconstructed luma values of neighboring chroma pixel positions may be analyzed to adaptively predict a chroma value for a chroma pixel position.
    • 描述了用于执行基于亮度的色度帧内预测的系统,设备和方法。 下采样滤波器可以应用于亮度像素位置的亮度值,以生成帧内预测单元中的色度像素位置的重建亮度值。 然后可以使用下采样的重构亮度值来预测色度像素位置的色度值。 在一些实现中,可以使用色度位置的重建亮度值来预测该位置的色度值。 在其他实现中,可以分析相邻色度像素位置的重建亮度值以自适应地预测色度像素位置的色度值。
    • 9. 发明授权
    • System and method for enhanced DMVD processing
    • 用于增强DMVD处理的系统和方法
    • US09509995B2
    • 2016-11-29
    • US13996582
    • 2010-12-21
    • Lidong XuYi-Jen ChiuWenhao ZhangHong Jiang
    • Lidong XuYi-Jen ChiuWenhao ZhangHong Jiang
    • H04N7/12H04N11/02H04N11/04H04N19/51H04N19/513H04N19/44H04N19/436
    • H04N19/513H04N19/436H04N19/44
    • 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.
    • 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。