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    CODING SIGNIFICANT COEFFICIENT INFORMATION IN TRANSFORM SKIP MODE
    91.
    发明申请
    CODING SIGNIFICANT COEFFICIENT INFORMATION IN TRANSFORM SKIP MODE 审中-公开
    编码转换跳转模式中的重要系数信息

    公开(公告)号：US20130114730A1

    公开(公告)日：2013-05-09

    申请号：US13670167

    申请日：2012-11-06

    Applicant: QUALCOMM Incorporated

    Inventor： Rajan Laxman Joshi ,  Joel Sole Rojals ,  Xianglin Wang ,  Marta Karczewicz ,  Vadim Seregin

    IPC: H04N7/30

    CPC classification number: H04N19/70 ,  H04N19/12 ,  H04N19/129 ,  H04N19/156 ,  H04N19/196 ,  H04N19/463 ,  H04N19/625

    Abstract: This disclosure describes techniques for coding significant coefficient information for a video block in a transform skip mode. The transform skip mode may provide a choice of a two-dimensional transform mode, a horizontal one-dimensional transform mode, a vertical one-dimensional transform mode, or a no transform mode. In other cases, the transform skip mode may provide a choice between a two-dimensional transform mode and a no transform mode. The techniques include selecting a transform skip mode for a video block, and coding significant coefficient information for the video block using a coding procedure defined based at least in part on the selected transform skip mode. Specifically, the techniques include using different coding procedures to code one or more of a position of a last non-zero coefficient and a significance map for the video block in the transform skip mode.

    Abstract translation: 本公开描述了用于以变换跳过模式对视频块的有效系数信息进行编码的技术。 变换跳过模式可以提供二维变换模式，水平一维变换模式，垂直一维变换模式或无变换模式的选择。 在其他情况下，变换跳过模式可以提供二维变换模式和无变换模式之间的选择。 这些技术包括：选择用于视频块的变换跳过模式，以及使用至少部分地基于所选择的变换跳过模式定义的编码过程来编码视频块的有效系数信息。 具体地说，这些技术包括使用不同的编码程序对变换跳过模式中的视频块的最后非零系数的位置和重要性映射的一个或多个进行编码。

    PERFORMING TRANSFORM DEPENDENT DE-BLOCKING FILTERING
    92.
    发明申请
    PERFORMING TRANSFORM DEPENDENT DE-BLOCKING FILTERING 有权
    执行变形相关的阻塞滤波

    公开(公告)号：US20130094572A1

    公开(公告)日：2013-04-18

    申请号：US13645345

    申请日：2012-10-04

    Applicant: Qualcomm Incorporated

    Inventor： Geert Van der Auwera ,  Rajan Laxman Joshi ,  Marta Karczewicz

    IPC: H04N7/26

    CPC classification number: H04N19/00096 ,  H04N19/126 ,  H04N19/70 ,  H04N19/86

    Abstract: In general, techniques are described for performing transform dependent de-blocking filtering, which may be implemented by a video encoding device. The video encoding device may apply a transform to a video data block to generate a block of transform coefficients, apply a quantization parameter to quantize the transform coefficients and reconstruct the block of video data from the quantized transform coefficients. The video encoding device may further determine at least one offset used in controlling de-blocking filtering based on the size of the applied transform, and perform de-blocking filtering on the reconstructed block of video data based on the determined offset. Additionally, the video encoder may specify a flag in a picture parameter set (PPS) that indicates whether the offset is specified in one or both of the PPS and a header of an independently decodable unit.

    Abstract translation: 通常，描述用于执行变换相关的去块滤波的技术，其可以由视频编码设备来实现。 视频编码装置可以向视频数据块应用变换以产生变换系数块，应用量化参数来量化变换系数并从量化变换系数重构视频数据块。 视频编码装置还可以基于所应用的变换的大小进一步确定用于控制解块滤波的至少一个偏移，并且基于所确定的偏移对重建的视频数据块执行解块滤波。 此外，视频编码器可以指定图像参数集（PPS）中的标志，其指示是否在PPS中的一个或两个中指定了偏移量，以及独立可解码单元的报头。

    SIGNALING PICTURE IDENTIFICATION FOR VIDEO CODING
    93.
    发明申请
    SIGNALING PICTURE IDENTIFICATION FOR VIDEO CODING 审中-公开
    用于视频编码的信号图像识别

    公开(公告)号：US20130089152A1

    公开(公告)日：2013-04-11

    申请号：US13645310

    申请日：2012-10-04

    Applicant: Qualcomm Incorporated

    Inventor： Ye-Kui Wang ,  Ying Chen ,  Rajan Laxman Joshi

    IPC: H04N7/26

    CPC classification number: H04N19/159 ,  H04N19/102 ,  H04N19/172 ,  H04N19/187 ,  H04N19/196 ,  H04N19/31 ,  H04N19/46 ,  H04N19/70

    Abstract: In one example, a video coder, such as a video encoder or video decoder, is configured to determine a number of least significant bits of picture identifying information for a picture of video data, determine a value of the picture identifying information for the picture, and code information indicative of the determined number of least significant bits of the value of the picture identifying information for the picture.

    Abstract translation: 在一个示例中，诸如视频编码器或视频解码器的视频编码器被配置为确定视频数据的图像的图像识别信息的最低有效位数，确定图像的图像识别信息的值， 以及指示所确定的图像的图像识别信息的值的最低有效位数的代码信息。

    Methods and systems of restricting bi-prediction in video coding
    100.
    发明授权
    Methods and systems of restricting bi-prediction in video coding 有权

    公开(公告)号：US10404992B2

    公开(公告)日：2019-09-03

    申请号：US15219159

    申请日：2016-07-25

    Applicant: QUALCOMM Incorporated

    Inventor： Krishnakanth Rapaka ,  Rajan Laxman Joshi ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/00 ,  H04N19/513 ,  H04N19/159 ,  H04N19/174 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/127

    Abstract: Techniques and systems are provided for encoding video data. For example, restrictions on certain prediction modes can be applied for video coding. A restriction can be imposed that prevents inter-prediction bi-prediction from being performed on video data when certain conditions are met. For example, bi-prediction restriction can be based on whether intra-block copy prediction is enabled for one or more coding units or blocks of the video data, whether a value of a syntax element indicates that one or more motion vectors are in non-integer accuracy, whether both motion vectors of a bi-prediction block are in non-integer accuracy, whether the motion vectors of a bi-prediction block are not identical and/or are not from the same reference index, or any combination thereof. If one or more of these conditions are met, the restriction on bi-prediction can be applied, preventing bi-prediction from being performed on certain coding units or blocks.

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