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    A VIDEO ENCODER AND A METHOD IN A VIDEO ENCODER
    4.
    发明公开
    A VIDEO ENCODER AND A METHOD IN A VIDEO ENCODER 审中-公开

    公开(公告)号：EP3370419A1

    公开(公告)日：2018-09-05

    申请号：EP17158882.5

    申请日：2017-03-02

    申请人： Axis AB

    发明人： Edpalm, Viktor

    IPC分类号： H04N19/109 ,  H04N19/14 ,  H04N19/176

    CPC分类号： H04N19/51 ,  H04N19/107 ,  H04N19/109 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/567 ,  H04N19/593

    摘要： There is provided a video encoder and a method in a video encoder. The method comprises receiving a frame to be encoded and dividing the current frame into blocks of pixels. For each block, a spatial variability is calculated and a cost function used to evaluate a cost for inter-coding the block of pixels is set to be dependent on the spatial variability. In particular, a ratio of a weight associated with a cost of encoding a motion vector and a weight associated with a sum of differences value is set to be lower if the spatial variability of the block of pixels in the current frame is below a first threshold compared to if the spatial variability is equal to or above the first threshold, The block is then matched with a plurality of blocks in a reference frame, and a cost for inter-coding the block with reference to each of the plurality of blocks in a reference frame is evaluated according to the cost function. The block of pixels of the current frame is then encoded. In case the block of pixels of the current frame is encoded as an inter-coded block, it is encoded with reference to a block of pixels in the reference frame having a lowest evaluated cost.

    MOTION VECTOR FIELD CODING METHOD AND DECODING METHOD, AND CODING AND DECODING APPARATUSES
    5.
    发明公开
    MOTION VECTOR FIELD CODING METHOD AND DECODING METHOD, AND CODING AND DECODING APPARATUSES 审中-公开

    公开(公告)号：EP3343923A1

    公开(公告)日：2018-07-04

    申请号：EP15901942.1

    申请日：2015-08-24

    申请人： Huawei Technologies Co., Ltd.

    发明人： ZHANG, Hong ,  YANG, Haitao

    IPC分类号： H04N19/52 ,  H04N19/567 ,  H04N19/573

    CPC分类号： H04N19/513 ,  H04N19/174 ,  H04N19/31 ,  H04N19/40 ,  H04N19/52 ,  H04N19/53 ,  H04N19/537 ,  H04N19/567 ,  H04N19/573 ,  H04N19/577

    摘要： Embodiments of the present invention disclose a motion vector field coding and decoding method, a coding apparatus, and a decoding apparatus. The method in the embodiments of the present invention includes: obtaining an original signal of a current motion vector field block, where the current motion vector field block is obtained by dividing a current motion vector field into blocks, and the current motion vector field is a motion vector field corresponding to a video frame at a moment t; obtaining a prediction signal of the current motion vector field block and prediction information of the current motion vector field block, where the prediction information is used to indicate information required for obtaining the prediction signal; calculating a prediction residual signal of the current motion vector field block according to the prediction signal and the original signal, where the prediction residual signal is used to indicate a residual between the original signal and the prediction signal; and writing the prediction information and the prediction residual signal into a bitstream. According to the embodiments of the present invention, motion vector field compression efficiency can be improved.

    DISTRIBUTED VIDEO ENCODING/DECODING APPARATUS AND METHOD TO ACHIEVE IMPROVED RATE DISTORTION PERFORMANCE
    7.
    发明公开
    DISTRIBUTED VIDEO ENCODING/DECODING APPARATUS AND METHOD TO ACHIEVE IMPROVED RATE DISTORTION PERFORMANCE 审中-公开
    分布式视频编码/解码装置及实现改进的速率失真性能的方法

    公开(公告)号：EP3211901A1

    公开(公告)日：2017-08-30

    申请号：EP16162175.0

    申请日：2016-03-24

    申请人： Wipro Limited

    发明人： KUMAR, Kodavalla Vijay

    IPC分类号： H04N19/30 ,  H04N19/103 ,  H04N19/137 ,  H04N19/172

    CPC分类号： H04N19/567 ,  H04N19/103 ,  H04N19/137 ,  H04N19/172 ,  H04N19/395 ,  H04N19/577 ,  H04N19/593

    摘要： This disclosure relates generally to distributed video coding. In one embodiment, distributed video encoding apparatus to achieve improved rate distortion performance is disclosed. The distributed video encoding apparatus comprises a processor and a memory communicatively coupled to the processor. The memory stores processor instructions, which, on execution, causes the processor to receive at least one Group of Pictures (GOP) comprising at least one key frame and at least one Wyner-Ziv (WZ) frame. The processor further determines a first value that is indicative of a cumulative motion activity associated with the at least one GOP. The processor further classifies the at least one GOP into one of one or more high-motion WZ frames and one or more low-motion WZ frames based on the determined first value. The processor encodes the high-motion WZ frames using inter no-motion encoding. The processor further encodes the one or more low-motion WZ frames using Wyner-Ziv encoding.

    摘要翻译： 本公开一般涉及分布式视频编码。 在一个实施例中，公开了实现改进的码率失真性能的分布式视频编码设备。 分布式视频编码设备包括处理器和通信地耦合到处理器的存储器。 存储器存储处理器指令，其在执行时使处理器接收包括至少一个关键帧和至少一个Wyner-Ziv（WZ）帧的至少一个图片组（GOP）。 处理器还确定指示与至少一个GOP相关联的累积运动活动的第一值。 处理器还基于确定的第一值将至少一个GOP分类为一个或多个高运动WZ帧和一个或多个低运动WZ帧中的一个。 处理器使用帧间无运动编码对高运动WZ帧进行编码。 处理器还使用Wyner-Ziv编码对一个或多个低运动WZ帧进行编码。

    IMAGE PREDICTION METHOD AND RELEVANT DEVICE
    8.
    发明公开
    IMAGE PREDICTION METHOD AND RELEVANT DEVICE 审中-公开
    BILDVORHERSAGEVERFAHREN UNDZUGEHÖRIGEVORRICHTUNG

    公开(公告)号：EP3177013A4

    公开(公告)日：2017-08-09

    申请号：EP15855669

    申请日：2015-04-23

    申请人： HUAWEI TECH CO LTD

    发明人： HUANG XIN ,  ZHANG HONG ,  YANG HAITAO

    IPC分类号： H04N19/51 ,  H04N19/44 ,  H04N19/567

    CPC分类号： H04N19/105 ,  H04N19/182 ,  H04N19/44 ,  H04N19/51 ,  H04N19/513 ,  H04N19/567

    摘要： Embodiments of the present invention disclose a picture prediction method and a related apparatus. The picture prediction method includes: determining N templates whose degrees of matching with a current template meet a preset condition, where the current template is a template corresponding to a current picture block, N is a positive integer, and the N templates are obtained by searching reference pictures of the current picture block; determining a weight of a pixel area in a picture block corresponding to each template in the N templates, where weights of at least two pixel areas in a picture block corresponding to at least one template in the N templates are different; and calculating a predicted pixel value of a pixel area in the current picture block based on the weight and a pixel value of the pixel area in the picture block corresponding to each template in the N templates, where the pixel area includes at least one pixel. The technical solutions in the embodiments of the present invention are helpful in improving picture prediction accuracy.

    摘要翻译： 本发明的实施例公开了一种图片预测方法和相关装置。 该图片预测方法包括：确定当前模板匹配度满足预设条件的N个模板，其中当前模板为当前图片块对应的模板，N为正整数，N个模板为搜索得到 当前图片块的参考图片; 确定所述N个模板中每个模板对应的图像块中像素区域的权重，其中，所述N个模板中至少一个模板对应的图像块中至少两个像素区域的权重不同; 根据所述N个模板中每个模板对应的图像块中像素区域的权重和像素值计算当前图像块中的像素区域的预测像素值，其中，所述像素区域包括至少一个像素。 本发明实施例中的技术方案有助于提高图片预测准确率。

    IMAGE PREDICTION METHOD AND RELEVANT DEVICE
    10.
    发明公开
    IMAGE PREDICTION METHOD AND RELEVANT DEVICE 审中-公开
    图像预测方法及相关装置

    公开(公告)号：EP3177013A1

    公开(公告)日：2017-06-07

    申请号：EP15855669.6

    申请日：2015-04-23

    申请人： Huawei Technologies Co. Ltd.

    发明人： HUANG, Xin ,  ZHANG, Hong ,  YANG, Haitao

    IPC分类号： H04N19/105 ,  H04N19/147 ,  H04N19/182 ,  H04N19/523

    CPC分类号： H04N19/105 ,  H04N19/182 ,  H04N19/44 ,  H04N19/51 ,  H04N19/513 ,  H04N19/567

    摘要： Embodiments of the present invention disclose a picture prediction method and a related apparatus. The picture prediction method includes: determining N templates whose degrees of matching with a current template meet a preset condition, where the current template is a template corresponding to a current picture block, N is a positive integer, and the N templates are obtained by searching reference pictures of the current picture block; determining a weight of a pixel area in a picture block corresponding to each template in the N templates, where weights of at least two pixel areas in a picture block corresponding to at least one template in the N templates are different; and calculating a predicted pixel value of a pixel area in the current picture block based on the weight and a pixel value of the pixel area in the picture block corresponding to each template in the N templates, where the pixel area includes at least one pixel. The technical solutions in the embodiments of the present invention are helpful in improving picture prediction accuracy.

    摘要翻译： 本发明的实施例公开了一种图片预测方法和相关装置。 该图片预测方法包括：确定当前模板匹配度满足预设条件的N个模板，其中当前模板为当前图片块对应的模板，N为正整数，N个模板为搜索得到 当前图片块的参考图片; 确定所述N个模板中每个模板对应的图像块中像素区域的权重，其中，所述N个模板中至少一个模板对应的图像块中至少两个像素区域的权重不同; 根据所述N个模板中每个模板对应的图像块中像素区域的权重和像素值计算当前图像块中的像素区域的预测像素值，其中，所述像素区域包括至少一个像素。 本发明实施例中的技术方案有助于提高图片预测准确率。