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1. 发明公开

EP2727363A1 METHOD AND APPARATUS OF INTRA MODE CODING 有权转让
标题翻译：方法和设备的编码态内
公开(公告)号：EP2727363A1
公开(公告)日：2014-05-07
申请号：EP12804868.3
申请日：2012-04-18
申请人： MediaTek Singapore Pte Ltd.
发明人： GUO, Mei , GUO, Xun , LEI, Shaw-Min
IPC分类号： H04N7/32
摘要： Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes.

2. 发明公开

EP2721827A1 METHOD AND APPARATUS OF DIRECTIONAL INTRA PREDICTION 无效转让
标题翻译：方法和装置为寻找帧内预测
公开(公告)号：EP2721827A1
公开(公告)日：2014-04-23
申请号：EP12802316.5
申请日：2012-06-20
申请人： MediaTek Singapore Pte Ltd.
发明人： GUO, Mei , ZHAO, Xin , GUO, Xun , LEI, Shaw-Min
IPC分类号： H04N7/68 , H04N7/26 , H04N7/32
CPC分类号： H04N19/00696 , H04N19/105 , H04N19/14 , H04N19/157 , H04N19/176 , H04N19/182 , H04N19/593
摘要： A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.

3. 发明公开

EP2801197A1 METHOD AND APPARATUS OF LUMA-BASED CHROMA INTRA PREDICTION 有权转让
标题翻译：基于LUMA的色度预测方法和装置
公开(公告)号：EP2801197A1
公开(公告)日：2014-11-12
申请号：EP12864615.5
申请日：2012-12-28
申请人： MediaTek Singapore Pte Ltd.
发明人： LEI, Shaw-Min , GUO, Xun
IPC分类号： H04N7/32 , H04N11/04
CPC分类号： H04N19/105 , H04N19/11 , H04N19/136 , H04N19/157 , H04N19/16 , H04N19/167 , H04N19/176 , H04N19/186 , H04N19/59 , H04N19/593
摘要： A method and apparatus for luma-based chroma intra prediction for a current chroma block are disclosed. The chroma intra predictor is derived from reconstructed luma pixels of a current luma block according to the chroma sampling format. Depending on the chroma sampling format, either sub-sampling, down-sampling or no processing is applied to the reconstructed luma pixels in horizontal or vertical direction. The information associated with the chroma sampling format can be incorporated in the sequence parameter set (SPS), the picture parameter set (PPS), the adaptation parameter set (APS) or the slice header of a video bitstream.
摘要翻译：公开了一种用于当前色度块的基于亮度的色度帧内预测的方法和设备。色度帧内预测器根据色度采样格式从当前亮度块的重构亮度像素导出。根据色度采样格式，在水平或垂直方向上对重构的亮度像素应用子采样，下采样或不处理。与色度采样格式相关联的信息可以并入视频比特流的序列参数集（SPS），图片参数集（PPS），自适应参数集（APS）或切片标头中。

4. 发明公开

EP2661880A1 METHOD AND APPARATUS OF IMPROVED INTRA LUMA PREDICTION MODE CODING 审中-公开
标题翻译：方法和设备改进的编码帧内亮度预测
公开(公告)号：EP2661880A1
公开(公告)日：2013-11-13
申请号：EP11855024.3
申请日：2011-07-05
申请人： MediaTek Singapore Pte Ltd.
发明人： GUO, Mei , GUO, Xun , LEI, Shaw-Min
IPC分类号： H04N7/24
CPC分类号： H04N19/593 , H04N19/11 , H04N19/159 , H04N19/196 , H04N19/463
摘要： A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra prediction modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is being considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. While the coding scheme for the intra luma prediction mode being considered may not fully exploit the neighboring intra luma prediction modes, it is desirable to further improve the performance. Accordingly, an improved coding scheme for intra prediction mode is disclosed, where more than one intra prediction mode candidates are derived.

5. 发明公开

EP2737696A1 METHOD AND APPARATUS FOR QUANTIZATION LEVEL CLIPPING 有权转让
标题翻译：方法和装置进行定量的纯剪报
公开(公告)号：EP2737696A1
公开(公告)日：2014-06-04
申请号：EP12858362.2
申请日：2012-12-14
申请人： MediaTek Singapore Pte Ltd.
发明人： GUO, Xun , LEI, Shaw-Min
IPC分类号： H04N7/00
CPC分类号： H04N19/124 , H03M7/3059 , H04N19/126 , H04N19/132 , H04N19/136 , H04N19/146 , H04N19/18 , H04N19/184 , H04N19/44 , H04N19/60
摘要： A method and apparatus for clipping a transform coefficient are disclosed. Embodiments according to the present invention avoid overflow of the quantized transform coefficient by clipping the quantization level adaptively after quantization. In one embodiment, the method comprises generating the quantization level for the transform coefficient of a transform unit by quantizing the transform coefficient according to a quantization matrix and quantization parameter. The clipping condition is determined and the quantization level is clipped according to the clipping condition to generate a clipping-processed quantization level. The clipping condition includes a null clipping condition. The quantization level is clipped to fixed-range represented in n bits for the null clipping condition, where n correspond to 8, 16, or 32. The quantization level may also be clipped within a range from −m to m−1 for the null clipping condition, where m may correspond to 128, 32768, or 2147483648.

6. 发明授权

EP2839656B1 METHOD AND APPARATUS OF SIMPLIFIED LUMA-BASED CHROMA INTRA PREDICTION 有权
公开(公告)号：EP2839656B1
公开(公告)日：2020-09-02
申请号：EP13778200.9
申请日：2013-01-24
申请人： MediaTek Singapore Pte. Ltd.
发明人： HSU, Juliana , GUO, Xun , GUO, Mei
IPC分类号： H04N19/593 , H04N19/186 , H04N19/42

7. 发明授权

EP2801197B1 METHOD AND APPARATUS OF LUMA-BASED CHROMA INTRA PREDICTION 有权转让
标题翻译：基于LUMA的色度预测方法和装置
公开(公告)号：EP2801197B1
公开(公告)日：2017-11-15
申请号：EP12864615.5
申请日：2012-12-28
申请人： MediaTek Singapore Pte. Ltd.
发明人： LEI, Shaw-Min , GUO, Xun
IPC分类号： H04N11/04 , H04N19/593 , H04N19/59 , H04N19/186
CPC分类号： H04N19/105 , H04N19/11 , H04N19/136 , H04N19/157 , H04N19/16 , H04N19/167 , H04N19/176 , H04N19/186 , H04N19/59 , H04N19/593

8. 发明公开

EP2859726A1 METHOD AND APPARATUS FOR INTRA TRANSFORM SKIP MODE 有权转让
标题翻译： VERFAHREN UND VORRICHTUNGFÜREINEN INTRATRANSFORMATIONS-ÜBERSPRINGUNGSMODUS
公开(公告)号：EP2859726A1
公开(公告)日：2015-04-15
申请号：EP13800677.0
申请日：2013-05-07
申请人： MediaTek Singapore Pte Ltd.
发明人： AN, Jicheng , ZHAO, Liang , GUO, Xun , Lei, Shaw-Min
IPC分类号： H04N7/50
CPC分类号： H04N19/61 , H04N19/12 , H04N19/127 , H04N19/159 , H04N19/176 , H04N19/44 , H04N19/70 , H04N19/91
摘要： A method and apparatus for video coding including an Intra transform Skip mode is disclosed. When the transform Skip mode is ON for a transform unit, embodiments according to the present invention apply different coding processes to the transform unit. The coding process with the transform Skip mode ON uses a different scan pattern from the coding process with the transform Skip mode OFF. According to various embodiments, the transform Skip mode is enabled when the transform unit size is 4x4, the prediction unit and the transform unit having the same size, or the prediction unit uses an INTRA_NxN mode. When the transform Skip mode is enabled, a flag can be signaled in the bitstream to indicate the transform Skip mode selection. Furthermore, the flag can be incorporated in a picture level, a slice level or a sequence level of the video bitstream.
摘要翻译：公开了一种包括Intra变换跳过模式的视频编码方法和装置。当变换单元的变换跳过模式为ON时，根据本发明的实施例将不同的编码处理应用于变换单元。使用转换跳过模式ON的编码过程使用转换跳过模式关闭的编码过程中的不同扫描模式。根据各种实施例，当变换单元大小为4×4，预测单元和具有相同大小的变换单元，或者预测单元使用INTRA_N×N模式时，变换跳过模式被使能。当启用变换跳过模式时，可以在比特流中用信号通知标志，以指示变换跳过模式选择。此外，标志可以并入视频比特流的图像级，片级或序列级。

9. 发明公开

EP2742692A1 METHOD AND APPARATUS FOR SIMPLIFIED MOTION VECTOR PREDICTOR DERIVATION 审中-公开
标题翻译：方法和设备的运动矢量预测的简化排水
公开(公告)号：EP2742692A1
公开(公告)日：2014-06-18
申请号：EP13739039.9
申请日：2013-01-16
申请人： MediaTek Singapore Pte Ltd.
发明人： ZHAO, Liang , GUO, Xun , LEI, Shaw-Min
IPC分类号： H04N7/32
CPC分类号： H04N19/139 , H04N19/105 , H04N19/107 , H04N19/176 , H04N19/503 , H04N19/51 , H04N19/513 , H04N19/52 , H04N19/56 , H04N19/593 , H04N19/70
摘要： A method and apparatus for deriving a motion vector predictor (MVP) candidate set for motion vector coding of a current block. Embodiments according to the present invention determine a redundancy-removed spatial MVP candidate set by removing any redundant MVP candidate from the spatial MVP candidate set. The redundancy-removal process does not apply to the temporal MVP candidate. In another embodiment of the present invention, a redundancy-removed spatial-temporal MVP candidate set is determined and the number of candidates in the redundancy-removed spatial-temporal MVP candidate set is checked to determine whether it is smaller than a threshold. If the number of candidates is smaller than the threshold, a zero motion vector is added to the redundancy-removed spatial-temporal MVP candidate set. The redundancy-removed spatial-temporal MVP candidate set is then provided for encoding or decoding of the motion vector of the current block.
摘要翻译：一种用于导出用于当前块的运动矢量编码的运动矢量预测值（MVP）候选集的方法和装置。实施例gemäß到本发明确定性矿冗余移除的空间候选MVP通过去除来自空间MVP候选集合中的任何多余的MVP候选组。冗余删除过程并不适用于时间MVP候选人。在本发明另一实施例，冗余移除的空间 - 时间MVP候选集是确定性的开采和在冗余移除的空间 - 时间MVP候选集的候选数被检查以确定矿无论是小于阈值。如果候选的数目是小于阈值，零运动向量被添加到冗余除去时空MVP候选集合。冗余-除去时空MVP候选集然后被提供用于当前块的运动矢量的编码或解码。

10. 发明公开

EP2742691A1 METHOD AND APPARATUS OF DEBLOCKING FILTER WITH SIMPLIFIED BOUNDARY STRENGTH DECISION 有权转让
标题翻译：方法和装置FILTERDEBLOCKIERUNG通过简化边界强度决定
公开(公告)号：EP2742691A1
公开(公告)日：2014-06-18
申请号：EP12845248.9
申请日：2012-10-29
申请人： MediaTek Singapore Pte Ltd.
发明人： GUO, Xun , AN, Jicheng , HSU, Chih-Wei , HUANG, Yu-Wen , LEI, Shaw-Min
IPC分类号： H04N7/26
CPC分类号： H04N19/82 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/86
摘要： A method and apparatus for deblocking of reconstructed video in a video coding system are disclosed. Embodiments according to the present invention determine boundary strength between two blocks without checking whether the block boundary is a coding unit (CU) boundary. In one embodiment according to the present invention, the method comprises determining whether any of the two blocks is Intra coded. If any of the two blocks is Intra coded, the boundary strength is assigned a first value. Otherwise, additional decision processing is performed to determine the boundary strength. In another embodiment, said determining the boundary strength for the block boundary comprises determining whether the block boundary is a TU boundary and whether any of the two blocks contains coefficients. In yet another embodiment, said determining the boundary strength for the block boundary comprises determining whether the two blocks have different reference pictures or different motion vectors.

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