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公开(公告)号：US10321140B2
公开(公告)日：2019-06-11
申请号：US15541802
申请日：2016-01-07
发明人： Xianguo Zhang , Kai Zhang , Jicheng An
IPC分类号： H04N19/186 , H04N19/103 , H04N19/593 , H04N19/11 , H04N19/159 , H04N19/176 , H04N19/44 , H04N19/70
摘要： A method for chroma Intra prediction allowing different chroma blocks in a coding unit to use separate chroma Intra prediction modes is disclosed. The method selects chroma Intra prediction modes for a first chroma block and one or more non-first chroma blocks in a current color block, where the first chroma block and at least one non-first chroma block use separate chroma Intra prediction modes. The method may comprise determining candidate mode sets for the first chroma block and the non-first chroma blocks. The method may also comprise signaling information of the chroma Intra prediction modes selected for the first chroma block and said one or more non-first chroma blocks. Furthermore, a method of chroma Intra prediction using one or more cross-chroma linear model Intra prediction modes is disclosed for improving coding efficiency of chroma Intra prediction.
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公开(公告)号：US10045014B2
公开(公告)日：2018-08-07
申请号：US14891129
申请日：2014-07-02
发明人： Kai Zhang , Jicheng An , Jian-Liang Lin , Xianguo Zhang
IPC分类号： H04N19/105 , H04N13/161 , H04N19/597 , H04N19/176 , H04N19/46 , H04N19/136 , H04N19/44 , H04N19/52 , H04N13/00
摘要： A method and apparatus for three-dimensional video encoding and decoding using disparity derived depth prediction are disclosed. Embodiments of the present invention determine a disparity vector related to a collocated texture block in the dependent view and generate converted depth samples from the disparity vector. The generated converted depth samples are used as a predictor or Merge candidate for the current depth block. The Merge candidate corresponding to the converted depth samples can be placed in the merging candidate list at a location before TMVP (temporal motion vector predictor) merging candidate. The converted depth samples can be generated from the disparity vector according to a function of the disparity vector. Information associated with the function can be signaled explicitly to a decoder or derived implicitly by the decoder. One aspect of the present invention addresses simplified disparity to depth conversion, specifically division-free disparity-to-depth conversion.
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公开(公告)号：US20160100190A1
公开(公告)日：2016-04-07
申请号：US14503427
申请日：2014-10-01
发明人： Xianguo Zhang , Kai Zhang , Jicheng An , Jian-Liang Lin
IPC分类号： H04N19/597 , H04N19/176 , H04N13/00
CPC分类号： H04N19/597 , H04N13/111 , H04N13/128 , H04N13/161 , H04N19/119 , H04N19/139 , H04N19/176
摘要： A method and apparatus for three-dimensional or multi-view video encoding and decoding using VSP (view synthesis prediction) with uniform sub-block partition are disclosed. For a current texture block comprising multiple partition blocks, the system derives a single partition decision and partitions each partition block of the current texture block into multiples sub-blocks according to the single partition decision. The VSP processing is then applied to each sub-block to derive the inter-view prediction using VSP. The single partition decision is derived using depth samples of the depth block in a reference view.
摘要翻译： 公开了一种使用具有均匀子块分割的VSP（视图合成预测）进行三维或多视点视频编码和解码的方法和装置。 对于包括多个分区块的当前纹理块，系统导出单个分区决定，并且根据单个分区决定将当前纹理块的每个分区块划分成多个子块。 然后将VSP处理应用于每个子块以使用VSP导出视图间预测。 使用参考视图中深度块的深度样本导出单个分区决策。
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公开(公告)号：US20150237324A1
公开(公告)日：2015-08-20
申请号：US14583628
申请日：2014-12-27
发明人： Xianguo Zhang , Kai Zhang , Jicheng An , Han Huang , Jian-Liang Lin
IPC分类号： H04N13/00
CPC分类号： H04N13/161 , H04N13/106 , H04N13/15 , H04N19/119 , H04N19/136 , H04N19/176 , H04N19/46 , H04N19/597
摘要： A method of simplified depth-based block partitioning (DBBP) for three-dimensional and multi-view video coding is disclosed. In one embodiment, the derivation of a representative value of a corresponding depth block or a reference texture block in a reference view for generating a segmentation mask and selecting a block partition are unified. In another embodiment, the first representative value, the second representative value, or both are calculated from partial samples of the corresponding depth block or the reference texture block. In yet another embodiment, a first representative value for first samples in a first partitioned block of the corresponding depth block or the reference texture block, and a second representative value for second samples in a second partitioned block of the corresponding depth block or the reference texture block for each of block partition candidates are determined.
摘要翻译： 公开了一种用于三维和多视角视频编码的简化基于深度的块分割（DBBP）的方法。 在一个实施例中，在用于生成分割掩码并选择块分区的参考视图中导出相应的深度块或参考纹理块的代表值是统一的。 在另一个实施例中，从对应的深度块或参考纹理块的部分样本计算第一代表值，第二代表值或二者。 在另一个实施例中，相应深度块或参考纹理块的第一分区块中的第一采样的第一代表值和对应深度块或参考纹理的第二分区块中的第二采样的第二代表值 确定每个块分区候选的块。
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5.发明授权公开(公告)号：US10244258B2
公开(公告)日：2019-03-26
申请号：US15032205
申请日：2015-06-23
发明人： Kai Zhang , Jicheng An , Xianguo Zhang , Han Huang , Jian-Liang Lin
IPC分类号： H04N19/597 , H04N19/105 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/70 , H04N13/161
摘要： A method and apparatus for processing a prediction block and using the modified prediction block for predictive coding of a current block are disclosed. Embodiments according to the present invention receive a prediction block for the current block and classify pixels in the prediction block into two or more segments. Each segment of the prediction block is then processed depending on information derived from each segment of the prediction block to form a modified prediction segment. The modified prediction block consisting of modified prediction segments of the prediction block is used as a predictor for encoding or decoding the current block.
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公开(公告)号：US09860562B2
公开(公告)日：2018-01-02
申请号：US15509831
申请日：2015-08-10
发明人： Xianguo Zhang , Kai Zhang , Jian-Liang Lin , Jicheng An , Yi-Wen Chen
IPC分类号： G06K9/46 , H04N19/593 , H04N19/597 , H04N19/146
CPC分类号： H04N19/593 , H04N19/146 , H04N19/597
摘要： A method and apparatus of depth coding using depth modelling mode 1 (DMM1) are disclosed to reduce the wedgelet pattern table size. In one embodiment, a size-reduced wedgelet pattern for a reduced wedgelet pattern table is generated by excluding at least one non-corner adjacent-edge sample for adjacent-edge partition or at least one opposite-edge sample for opposite-edge partition from starting positions or from ending positions. The reduced wedgelet pattern table may also include at least one omitted wedgelet pattern in at least one wedgelet direction category. For the adjacent-edge partition, the starting positions and the ending positions may correspond to every other even non-corner adjacent-edge samples in a first and a second adjacent edges respectively. For the opposite-edge partition, the starting positions correspond to every other even opposite-edge samples in a first opposite edge and the ending positions include all opposite-edge samples in a second opposite edge.
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公开(公告)号：US09860559B2
公开(公告)日：2018-01-02
申请号：US14660196
申请日：2015-03-17
发明人： Kai Zhang , Jicheng An , Xianguo Zhang , Han Huang
IPC分类号： H04N19/593 , H04N19/567
CPC分类号： H04N19/593 , H04N19/567
摘要： A method and apparatus for video coding including an IntraBC (Intra-block copy) mode for a picture according to the present invention is disclosed. Embodiments of the present invention take advantage of pattern symmetry in screen contents as well as natural video to improve the performance of IntraBC coding. Accordingly, at least a reference block is reformed to generate a reformed predictor and IntraBC coding is applied to a block using the reformed predictor. Reforming the reference block may correspond to applying a reforming operation selected from a reforming group to the reference block, where the reforming group consists of horizontal flipping, vertical flipping, horizontal and vertical flipping, clockwise rotation, counter-clockwise rotation and transposition.
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公开(公告)号：US20150195570A1
公开(公告)日：2015-07-09
申请号：US14582045
申请日：2014-12-23
发明人： Xianguo Zhang , Kai Zhang , Jicheng An , Jian-Liang Lin
IPC分类号： H04N19/597 , H04N19/517
CPC分类号： H04N19/597 , H04N19/119 , H04N19/157 , H04N19/176 , H04N19/517
摘要： A method of improved texture-partition-dependent depth partition is disclosed. First, the available texture partitions for a collocated texture block are classified into two or more groups, and a set of candidate depth partitions is determined for each group. In one embodiment, at least one set of the candidate depth partitions contain more than one candidate depth partition and less than all candidate depth partitions. In another embodiment, the collocated texture blocks are classified into two groups, and one of the two groups includes the N×N texture partition and at least another texture partition. In yet another embodiment, the collocated texture blocks are classified into three groups or more. A current depth partition for the current depth block is then selected from a corresponding set of candidate depth partitions according to a corresponding group that a current texture partition associated with the collocated texture block belongs.
摘要翻译： 公开了一种改进的纹理分区相关深度分区的方法。 首先，将用于并置纹理块的可用纹理分区分为两个或更多个组，并且为每个组确定一组候选深度分区。 在一个实施例中，至少一组候选深度分区包含多于一个候选深度分区并且小于所有候选深度分区。 在另一个实施例中，并置的纹理块被分成两组，两组之一包括N×N纹理分区和至少另一个纹理分区。 在另一个实施例中，并置纹理块被分为三组或更多组。 然后根据与并置纹理块相关联的当前纹理分区所属的对应组从相应的候选深度分区组中选择当前深度块的当前深度分区。
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公开(公告)号：US10271048B2
公开(公告)日：2019-04-23
申请号：US15666020
申请日：2017-08-01
发明人： Xianguo Zhang , Kai Zhang , Jicheng An
IPC分类号： H04N19/17 , H04N19/46 , H04N19/70 , H04N19/103 , H04N19/105 , H04N19/119 , H04N19/147 , H04N19/176 , H04N19/553
摘要： A method and apparatus for video encoding or decoding utilizing adaptive background residual prediction is disclosed. The present invention adaptively applies background residual prediction to a current block based on a selection decision. The coding block is split into one or more coding sub-blocks. A reference sub-block in a reference picture is located for a current coding sub-block of the current coding block according to a motion vector associated with the current coding block. A background reference sub-block in a background picture is located for the reference sub-block, where the background reference sub-block is at a first co-located location as the reference sub-block. The method then selects a first predictor or a second predictor to encode or decode the current sub-block based on a selection decision. The first predictor corresponds to the reference sub-block, and the second predictor is derived according to the reference sub-block and the background picture.
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公开(公告)号：US10257536B2
公开(公告)日：2019-04-09
申请号：US15323809
申请日：2015-07-15
发明人： Han Huang , Jicheng An , Kai Zhang , Xianguo Zhang
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/577 , H04N19/52 , H04N19/517 , H04N19/70
摘要： A method and apparatus of deriving a temporal derived motion vector in a second direction based on a given motion vector in a first direction for motion vector prediction are disclosed. According to the present invention, a given motion vector for a current block is determined, where the given motion vector points from the current block in a first direction. A reference motion vector associated with a first reference block in a first reference frame is identified. Then, based on the reference motion vector and the given motion vector, a temporal derived motion vector is derived. The temporal derived motion vector points from the current block to a second reference block in a second reference frame in a second direction different from the first direction. The temporal derived motion vector is then used as one predictor for encoding or decoding of the motion vector of the current block.
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