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11. 发明授权

US10412406B2 Method and apparatus for deriving temporal motion vector prediction 有权
公开(公告)号：US10412406B2
公开(公告)日：2019-09-10
申请号：US15564206
申请日：2016-04-13
申请人： MediaTek Singapore Pte. Ltd. , Kai Zhang , Jicheng An
发明人： Kai Zhang , Jicheng An
IPC分类号： H04N19/30 , H04N19/31 , H04N19/52 , H04N19/70 , H04N19/503 , H04N19/176
摘要： A method and apparatus for encoding or decoding a motion vector (MV) of a current block of a current picture using advanced temporal motion vector prediction are disclosed. At least two collocated pictures are selected from a set of reference pictures of the current picture. One or more TMVPs are derived based on reference motion vectors (MVs) associated with collocated reference blocks of the collocated pictures. A motion vector prediction candidate set including one or more TMVPs is then determined. The current block is encoded or decoding using the motion vector prediction candidate set. The reference motion vectors (MVs) are scaled before the reference motion vectors (MVs) are used to derive the TMVPs.

12. 发明授权

US11153562B2 Method and apparatus of advanced deblocking filter in video coding 有权
公开(公告)号：US11153562B2
公开(公告)日：2021-10-19
申请号：US15758874
申请日：2016-09-13
申请人： Kai Zhang , Jicheng An , Han Huang
发明人： Kai Zhang , Jicheng An , Han Huang
IPC分类号： H04N19/86 , H04N19/117 , H04N19/136 , H04N19/176
摘要： A method and apparatus for adaptive de-blocking filter are disclosed. One or more parameters associated with a de-blocking filter are determined. De-blocking filter using the derived parameters are then applied to reconstructed blocks. Each set of parameters is used for each picture, slice, coding tree unit (CTU) or CU (coding unit). The parameters can be signalled in VPS (video parameter set), SPS (sequence parameter set), PPS (picture parameter set), slice header, CTU (coding tree unit) or CU (coding unit) of the video bitstream. The parameters correspond to one or more values used as thresholds, clipping boundaries, or both the thresholds and clipping boundaries for the de-blocking filter. In one embodiment, the parameters for the current picture are determined using a training process using a current coded picture a previous coded picture as training data.

13. 发明申请

US20150264347A1 METHOD AND APPARATUS OF MOTION VECTOR DERIVATION 3D VIDEO CODING 有权
标题翻译：运动矢量衍生3D视频编码的方法与装置
公开(公告)号：US20150264347A1
公开(公告)日：2015-09-17
申请号：US14433328
申请日：2013-09-02
申请人： Kai ZHANG , Jicheng AN
发明人： Kai Zhang , Jicheng An
IPC分类号： H04N19/105 , H04N19/139 , H04N19/597 , H04N19/176
CPC分类号： H04N19/105 , H04N19/139 , H04N19/176 , H04N19/52 , H04N19/527 , H04N19/597
摘要： A method and apparatus for three-dimensional and multi-view video coding are disclosed, where the motion vector (MV) or disparity vector (DV) candidate list construction process for a block depends on whether the target reference picture corresponds to an inter-view reference picture or whether the inter-view candidate refers to an inter-view reference picture. In one embodiment, an MV or DV candidate list for a block coded in Merge mode is constructed, and an inter-view candidate in the MV or DV candidate list is set lower than the first candidate position if the inter-view candidate refers to an inter-view reference picture. In another embodiment, an MV or DV candidate list for a block coded in advanced motion vector prediction mode is constructed, and an inter-view candidate is set lower than the first candidate position if the inter-view candidate refers to an inter-view reference picture.
摘要翻译：公开了一种用于三维和多视点视频编码的方法和装置，其中用于块的运动矢量（MV）或视差矢量（DV）候选列表构造处理取决于目标参考图片是否对应于视角参考图片或视频间候选者是否参考视频间参考图片。在一个实施例中，构建用于以合并模式编码的块的MV或DV候选列表，并且如果视频间候选者参考到第一候选列表，则将MV或DV候选列表中的视频间候选设置为低于第一候选位置视图参考图片。在另一个实施例中，构建用于以高级运动矢量预测模式编码的块的MV或DV候选列表，如果视角间候选参考视角间参考，则将视频间候选设置为低于第一候选位置图片。

14. 发明授权

US10812806B2 Method and apparatus of localized luma prediction mode inheritance for chroma prediction in video coding 有权
公开(公告)号：US10812806B2
公开(公告)日：2020-10-20
申请号：US16078193
申请日：2017-02-21
申请人： Kai Zhang , Jicheng An , Han Huang
发明人： Kai Zhang , Jicheng An , Han Huang
IPC分类号： H04N19/159 , H04N19/176 , H04N19/119 , H04N19/186 , H04N19/11 , H04N19/139 , H04N19/61
摘要： A method and apparatus of Inter/Intra prediction for a chroma component performed by a video encoder or video decoder are disclosed. According to this method, a current chroma prediction block (e.g. a prediction unit, PU) is divided into multiple chroma prediction sub-blocks (e.g. sub-PUs). A corresponding luma prediction block is identified for each chroma prediction sub-block. A chroma prediction mode for each chroma prediction sub-block is determined from a luma prediction mode associated with the corresponding luma prediction block. A local chroma predictor for the current chroma prediction block is generated by applying a prediction process to the multiple chroma prediction sub-blocks using respective chroma prediction modes. In other words, the prediction process is applied at the chroma prediction sub-block level. After the local chroma predictor is derived, a coding block associated with the current chroma prediction block is encoded or decoded using information comprising the local chroma predictor.

15. 发明授权

US10382778B2 Method for motion vector storage in video coding and apparatus thereof 有权
公开(公告)号：US10382778B2
公开(公告)日：2019-08-13
申请号：US16084108
申请日：2017-03-13
申请人： Han Huang , Kai Zhang , Jicheng An
发明人： Han Huang , Kai Zhang , Jicheng An
IPC分类号： H04N19/52 , H04N19/105 , H04N19/517 , H04N19/59 , H04N19/176 , H04N19/31 , H04N19/33 , H04N19/91
摘要： Apparatus and methods are described for a video encoder that uses reference motion vectors (MVs) with reduced precision to generate predicted MVs. The video encoder receives a block of pixels of a video frame and generates a MV for encoding the block of pixels by motion compensation. The video encoder creates a reduced-precision MV by reducing a precision of the generated MV based on a precision reduction scaling factor. The video encoder also stores the reduced-precision MV in a MV buffer as a reference MV for temporal or spatial MV prediction.

16. 发明授权

US10326990B2 Method of alternative transform for data compression 有权
公开(公告)号：US10326990B2
公开(公告)日：2019-06-18
申请号：US15308732
申请日：2015-05-11
申请人： Jicheng An , Kai Zhang
发明人： Jicheng An , Kai Zhang
IPC分类号： H04N19/12 , H04N19/159 , H04N19/176 , H04N19/157 , H04N19/44
摘要： A method and apparatus of adaptive image and video coding including an alternative transform other than the discrete cosine transform (DCT) and discrete sine transform (DST) type VII (DST-VII) are disclosed. For at least one block size belonging to the size group, a transform from multiple transforms comprising an alternative transform in addition to DCT and DST-VII is selected and applied to a current block. The alternative transform may correspond to DCT type IV (DCT-IV) or DST type IV (DST-IV).

17. 发明申请

US20110293004A1 METHOD FOR PROCESSING MOTION PARTITIONS IN TREE-BASED MOTION COMPENSATION AND RELATED BINARIZATION PROCESSING CIRCUIT THEREOF 审中-公开
标题翻译：在基于树的运动补偿中处理运动分段的方法及其相关的二进制加工电路
公开(公告)号：US20110293004A1
公开(公告)日：2011-12-01
申请号：US13007991
申请日：2011-01-17
申请人： Jicheng An , Ching-Yeh Chen , Yu-Wen Huang , Xun Guo
发明人： Jicheng An , Ching-Yeh Chen , Yu-Wen Huang , Xun Guo
IPC分类号： H04N7/26
CPC分类号： H04N19/463 , H04N19/119 , H04N19/61 , H04N19/96
摘要： A method for processing a target motion partition in a tree-based motion compensation includes utilizing a setting unit for providing a first binarization rule which defines a plurality of binarization codewords mapped to a plurality of syntax elements for different motion partitions, respectively, wherein a codeword length of a binarization codeword corresponding to any square inter-prediction motion partition is shorter than a codeword length of a binarization codeword corresponding to any non-square inter-prediction motion partition; and identifying mapping between a target binarization codeword and a target syntax element of the target motion partition according to the first binarization rule.
摘要翻译：一种用于在基于树的运动补偿中处理目标运动分区的方法包括利用设置单元来提供第一二值化规则，其分别定义映射到用于不同运动分区的多个语法元素的多个二值化码字，其中码字对应于任何正方形预测间运动分区的二值化代码字的长度比对应于任何非正方形预测间运动分区的二值化代码字的码字长度短; 以及根据所述第一二值化规则来识别所述目标运动分区的目标二值化码字和目标语法元素之间的映射。

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