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1. 发明申请

WO2020069076A1 BI-PREDICTION FOR VIDEO CODING 审中-公开
公开(公告)号：WO2020069076A1
公开(公告)日：2020-04-02
申请号：PCT/US2019/053088
申请日：2019-09-26
申请人： VID SCALE, INC.
发明人： HE, Yuwen , LUO, Jiancong , XIU, Xiaoyu , YE, Yan
IPC分类号： H04N19/137 , H04N19/159
摘要： Systems, methods, and instrumentalities may be provided for determining whether to bypass bi-directional optical flow (BDOF) if BDOF is used in combination with bi-prediction with coding unit (CU) weights ( e.g ., generalized bi-prediction (GBi)). A coding system may combine coding modes, coding techniques, and/or coding tools. The coding system may include a wireless transmit/receive unit (WTRU). For example, the coding system may combine BDOF and bi-prediction with GU weights (BCW). BDOF may include refining a motion vector associated with a current CU based at least in part on gradients associated with a location in the current CU. The coding system may determine that BDOF is enabled, and/or that bi-prediction with CU weights is enabled for the current CU. The coding system's determination that bi-prediction with CU weights is enabled and/or that BDOF is enabled may be based on one or more indications.

2. 发明申请

WO2020047132A1 ADAPTIVE MOTION VECTOR PRECISION FOR AFFINE MOTION MODEL BASED VIDEO CODING 审中-公开
公开(公告)号：WO2020047132A1
公开(公告)日：2020-03-05
申请号：PCT/US2019/048615
申请日：2019-08-28
申请人： VID SCALE, INC.
发明人： HE, Yuwen , XIU, Xiaoyu , YE, Yan , LUO, Jiancong
IPC分类号： H04N19/109 , H04N19/13 , H04N19/134 , H04N19/147 , H04N19/176 , H04N19/184 , H04N19/52 , H04N19/523 , H04N19/54
摘要： Systems and methods are described for video coding using affine motion models with adaptive precision. In an example, a block of video is encoded in a bitstream using an affine motion model, where the affine motion model is characterized by at least two motion vectors. A precision is selected for each of the motion vectors, and the selected precisions are signaled in the bitstream. In some embodiments, the precisions are signaled by including in the bitstream information that identifies one of a plurality of elements in a selected predetermined precision set. The identified element indicates the precision of each of the motion vectors that characterize the affine motion model. In some embodiments, the precision set to be used is signaled expressly in the bitstream; in other embodiments, the precision set may be inferred, e.g., from the block size, block shape or temporal layer.

3. 发明申请

WO2019148117A1 FRAME-RATE UP CONVERSION WITH LOW COMPLEXITY 审中-公开
公开(公告)号：WO2019148117A1
公开(公告)日：2019-08-01
申请号：PCT/US2019/015449
申请日：2019-01-28
申请人： VID SCALE, INC.
发明人： XIU, Xiaoyu , HE, Yuwen , YE, Yan
IPC分类号： H04N19/57 , H04N19/56
摘要： Systems and methods are described for selecting a motion vector (MV) to use in frame-rate up conversion (FRUC) coding of a block of video. In one embodiment, a first set of motion vector candidates is identified for FRUC prediction of the block. A search center is defined based on the first set of motion vector candidates, and a search window is determined, the search window having a selected width and being centered on the search center. A search for a selected MV is performed within the search window. In some embodiments, an initial set of MVs is processed with a clustering algorithm to generate a smaller number of MVs that are used as the first set. The selected MV may be subject to a motion refinement search, which may also be performed over a constrained search range. In additional embodiments, search iterations are constrained to limit complexity.

4. 发明申请

WO2019032765A8 FRAME-RATE UP CONVERSION WITH REDUCED COMPLEXITY 审中-公开
公开(公告)号：WO2019032765A8
公开(公告)日：2019-02-14
申请号：PCT/US2018/045900
申请日：2018-08-09
申请人： VID SCALE, INC.
发明人： XIU, Xiaoyu , HE, Yuwen , YE, Yan , ZHANG, Yan
IPC分类号： H04N19/56 , H04N19/139 , H04N19/176 , H04N19/70 , H04N19/109
摘要： When a FRUC mode is enabled for a current coding unit (CU), motion vector (MV) candidates may be derived for the current CU, One or more search MVs may be derived from the MV candidates so that an initiai motion search may be performed for the current CU using the search MVs. The search MVs, which may be fewer than the MV candidates for the CU, may be derived based on one or more attributes of the MV candidates. At the sub-CU level, sub-CU MV candidates may be determined for a current sub-CU. Sub-CU search MVs may be derived from the sub-CU MV candidates for the current sub-CU so that a motion search may be performed for the current sub-CU using the sub-CU search MVs. The number of the sub-CU search MVs may be smaller than the number of the sub-CU MV candidates.

5. 发明申请

WO2018045332A1 METHODS AND APPARATUS FOR CODED BLOCK FLAG CODING IN QUAD-TREE PLUS BINARY-TREE BLOCK PARTITIONING 审中-公开
标题翻译：用于四叉树二叉树分块中编码块标记编码的方法和装置
公开(公告)号：WO2018045332A1
公开(公告)日：2018-03-08
申请号：PCT/US2017/049937
申请日：2017-09-01
申请人： VID SCALE, INC.
发明人： XIU, Xiaoyu , HE, Yuwen
IPC分类号： H04N19/70 , H04N19/96
CPC分类号： H04N19/70 , H04N19/96
摘要： Systems and methods are proposed herein for coded block flag (CBF) signaling. In some embodiments, a hierarchical signaling method is used to signal the CBFs of chroma components for the quad-tree plus binary tree (QTBT) structure. A CBF flag may be signaled at each QTBT node level for each chroma component, indicating whether any descendent QTBT leaf node under the current level is associated with a non-zero coefficient. In some embodiments, for inter-coded pictures, a flag at the QTBT root node may indicate whether there are non-zero transform coefficients in the descendent leaf nodes that originate from the current root node. When the flag is equal to 1, the coefficients of the descendent leaf nodes under the current node may be signaled; otherwise, no further residual information is transmitted and all the transform coefficients are inferred to be 0.
摘要翻译：这里提出了用于编码块标志（CBF）信令的系统和方法。在一些实施例中，使用分层信令方法来用信号通知四叉树加二叉树（QTBT）结构的色度分量的CBF。 CBF标志可以在每个QTBT节点级针对每个色度分量用信号通知，指示当前级别下的任何派生QTBT叶节点是否与非零系数相关联。在一些实施例中，对于帧间编码图片，QTBT根节点处的标志可以指示在源自当前根节点的后代叶节点中是否存在非零变换系数。当标志等于1时，可以发信号通知当前节点下属的叶子节点的系数; 否则，不会传输更多的残差信息，并且所有变换系数都被推断为0。

6. 发明申请

WO2017192898A1 CONTROL-POINT BASED INTRA DIRECTION REPRESENTATION FOR INTRA CODING 审中-公开
标题翻译：基于控制点的内部编码的方向表示
公开(公告)号：WO2017192898A1
公开(公告)日：2017-11-09
申请号：PCT/US2017/031133
申请日：2017-05-04
申请人： VID SCALE, INC.
发明人： XIU, Xiaoyu , HE, Yuwen , YE, Yan
IPC分类号： H04N19/176 , H04N19/147 , H04N19/11 , H04N19/463 , H04N19/182 , H04N19/59
CPC分类号： H04N19/105 , H04N19/11 , H04N19/147 , H04N19/176 , H04N19/182 , H04N19/463 , H04N19/59 , H04N19/593
摘要： Systems and methods are described for control-point based intra mode for coding a video bitstream. In an exemplary embodiment, at least two control points in a picture are selected. The control points may be, for example, points at or adjacent to two or more corners of a current block. For each of the control points, an associated intra prediction direction is identified. The intra prediction directions may be encoded in the bitstream, e.g. using differential coding. A derived intra prediction direction is interpolated based on a position of a pixel (or of a block) relative to the control points, and the derived intra prediction direction is used to predict one or more samples in the video. Different interpolation techniques, such as triangular interpolation or bilinear interpolation may be used.
摘要翻译：针对编码视频比特流的基于控制点的帧内模式描述了系统和方法。在示例性实施例中，选择图片中的至少两个控制点。控制点可以是例如在当前块的两个或更多个拐角处或与其相邻的点。对于每个控制点，识别相关联的帧内预测方向。帧内预测方向可以被编码在比特流中，例如，使用差分编码。导出的帧内预测方向是基于像素（或块的）相对于控制点的位置而被内插的，并且导出的帧内预测方向被用于预测视频中的一个或多个样本。可以使用不同的插值技术，例如三角插值或双线性插值。

7. 发明申请

WO2017083553A1 SYSTEMS AND METHODS FOR CODING IN SUPER-BLOCK BASED VIDEO CODING FRAMEWORK 审中-公开
标题翻译：用于在基于超块的视频编码框架中编码的系统和方法
公开(公告)号：WO2017083553A1
公开(公告)日：2017-05-18
申请号：PCT/US2016/061379
申请日：2016-11-10
申请人： VID SCALE, INC.
发明人： WANG, Miaohui , HE, Yuwen , YE, Yan , XIU, Xiaoyu
IPC分类号： H04N19/119 , H04N19/14 , H04N19/147 , H04N19/174 , H04N19/70
CPC分类号： H04N19/119 , H04N19/14 , H04N19/147 , H04N19/174 , H04N19/70
摘要： Systems and methods are provided for video coding (e.g., encoding and/or decoding). A coding device may include a processor. The processor may be configured to receive a video frame and partition the video frame into a super coding units (SCUs). The processor may be configured to partition each of the SCUs into coding tree units (CTUs) based on a coding mode.
摘要翻译：系统和方法被提供用于视频编码（例如，编码和/或解码）。编码设备可以包括处理器。处理器可以被配置为接收视频帧并将视频帧划分为超级编码单元（SCU）。处理器可以被配置为基于编码模式将每个SCU分割成编码树单元（CTU）。

8. 发明申请

WO2016123398A2 INTRA-BLOCK COPY SEARCHING 审中-公开
标题翻译：内部复制搜索
公开(公告)号：WO2016123398A2
公开(公告)日：2016-08-04
申请号：PCT/US2016/015457
申请日：2016-01-28
申请人： VID SCALE, INC.
发明人： HE, Yuwen , XIU, Xiaoyu , YE, Yan
IPC分类号： H04N19/105 , H04N19/593 , H04N19/196 , H04N19/176 , H04N19/186
CPC分类号： H04N19/105 , H04N19/176 , H04N19/186 , H04N19/197 , H04N19/593
摘要： A video coding device may encode a video signal using intra-block copy prediction. A first picture prediction unit of a first picture may be identified. A second picture may be coded and identified. The second picture may be temporally related to the first picture, and the second picture may include second picture prediction units. A second picture prediction unit that is collocated with the first picture prediction unit may be identified. Prediction information for the first picture prediction unit may be generated. The prediction information may be based on a block vector of the second picture prediction unit that is collocated with the first picture prediction unit.
摘要翻译：视频编码装置可以使用块内复制预测对视频信号进行编码。可以识别第一图像的第一图像预测单元。可以编码和识别第二图像。第二图像可能在时间上与第一图像相关，并且第二图像可以包括第二图像预测单元。可以识别与第一图像预测单元并置的第二图像预测单元。可以生成第一图像预测单元的预测信息。预测信息可以基于与第一图像预测单元并置的第二图像预测单元的块矢量。

9. 发明申请

WO2016048834A1 INTRA BLOCK COPY CODING WITH TEMPORAL BLOCK VECTOR PREDICTION 审中-公开
标题翻译：内部块复制编码与时间块矢量预测
公开(公告)号：WO2016048834A1
公开(公告)日：2016-03-31
申请号：PCT/US2015/051001
申请日：2015-09-18
申请人： VID SCALE, INC.
发明人： HE, Yuwen , YE, Yan , XIU, Xiaoyu
IPC分类号： H04N19/52 , H04N19/176 , H04N19/70 , H04N19/11 , H04N19/147
CPC分类号： H04N19/52 , H04N19/11 , H04N19/147 , H04N19/176 , H04N19/70
摘要： Embodiments disclosed herein operate to improve prior video coding techniques by incorporating an IntraBC flag explicitly at the prediction unit level in merge mode. This flag allows separate selection of block vector (BV) candidates and motion vector (MV) candidates. Specifically, explicit signaling of an IntraBC flag provides information on whether a specific prediction unit will use a BV or an MV. If the IntraBC flag is set, the candidate list is constructed using only spatial and temporal neighboring BVs. If the IntraBC flag is not set, the candidate list is constructed using only spatial and temporal neighboring MVs. An index is then coded which points into the list of candidate BVs or MVs. Further embodiments disclosed herein describe the use of BV-MV bi-prediction in a unified IntraBC and inter framework.
摘要翻译：本文公开的实施例通过在合并模式下以预测单元级别明确地并入IntraBC标志来改进先前的视频编码技术。该标志允许单独选择块矢量（BV）候选和运动矢量（MV）候选。具体来说，IntraBC标志的显式信令提供关于特定预测单元是否将使用BV或MV的信息。如果设置IntraBC标志，则仅使用空间和时间相邻的BV构建候选列表。如果没有设置IntraBC标志，则仅使用空间和时间相邻MV构造候选列表。然后编码指向候选BV或MV列表的索引。本文公开的另外的实施例描述了在统一的IntraBC和inter框架中使用BV-MV双预测。

10. 发明申请

WO2020132556A2 METHODS, ARCHITECTURES, APPARATUSES AND SYSTEMS DIRECTED TO IMPROVED LINEAR MODEL ESTIMATION FOR TEMPLATE BASED VIDEO CODING 审中-公开
公开(公告)号：WO2020132556A2
公开(公告)日：2020-06-25
申请号：PCT/US2019/068038
申请日：2019-12-20
申请人： VID SCALE, INC.
发明人： BANDYOPADHYAY, Saurav , XIU, Xiaoyu , HE, Yuwen
IPC分类号： H04N19/42 , H04N19/186 , H04N19/593
摘要： Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed to improved linear model estimation for template-based video coding are provided. Included therein is a method comprising determining minimum and maximum ("min/max") values of luma and chroma samples neighboring a coding block, wherein the min/max chroma values correspond to the min/max luma values; determining a first linear model parameter of a template-based video coding technique (i) based on a single look-up table and the min/max chroma values and (ii) at a precision no greater than 16 bits; determining a second linear model parameter of the template-based video coding technique (i) based on the first linear model parameter and the minimum chroma and luma values and (ii) at a precision no greater than 16 bits; and predicting chroma samples of the coding block based on reconstructed luma samples of the coding block and the first and second linear model parameters.

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