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11. 发明申请

WO2019148977A1 METHODS AND APPARATUSES OF VIDEO ENCODING OR DECODING WITH ADAPTIVE QUANTIZATION OF VIDEO DATA 审中-公开
公开(公告)号：WO2019148977A1
公开(公告)日：2019-08-08
申请号：PCT/CN2018/120629
申请日：2018-12-12
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/00 , H04N7/00
摘要： Video encoding or decoding methods and apparatuses for processing video data with color components comprise receiving video data, performing inter prediction and intra prediction, determining a luma Quantization Parameter (QP), deriving a chroma QP bias, calculating a chroma QP from the chroma QP bias and the luma QP, performing transform or inverse transform, and performing quantization or inverse quantization for the luma component utilizing the luma QP and for the chroma component utilizing the chroma QP. The chroma QP bias is derived from an intermediate QP index, and the intermediate QP index is computed by clipping a sum of the luma QP and a chroma QP offset parameter to a specified range. The bits allocated to code the luma and chroma components may be adaptively controlled by restricting the chroma QP bias.

12. 发明申请

WO2018171751A1 TRANSFORM CODING OF VIDEO DATA 审中-公开
公开(公告)号：WO2018171751A1
公开(公告)日：2018-09-27
申请号：PCT/CN2018/080328
申请日：2018-03-23
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/103 , H04N19/176 , H04N19/186
摘要： A picture defined in video data is partitioned into blocks that include a luminance (luma) transform block and a chrominance (chroma) transform block. One or more constraints pertaining to the picture are determined from high-level syntax elements and transform skipping of one of both of the luma transform block and the chroma transform block is disallowed if the constraints are not met. The video data are encoded in a bitstream along with an indication that the transform of the luma transform block or the chroma transform block is skipped in response to the transform being skipped.

13. 发明申请

WO2021218890A1 METHOD AND APPARATUS FOR IMPOSING BITSTREAM CONSTRAINTS IN VIDEO CODING 审中-公开
公开(公告)号：WO2021218890A1
公开(公告)日：2021-11-04
申请号：PCT/CN2021/089824
申请日：2021-04-26
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/122 , H04N19/60 , H04N19/70
摘要： A method and apparatus for signaling or parsing general constraint information are disclosed. According to the method for the decoder side, a video bitstream comprising a current picture is received. A first syntax of general constraint information related to one or more explicit scaling list constraints is parsed from the video bitstream, where when a value of the first syntax indicates constraint of no_explicit_scaling_list being imposed, a second syntax has a mandatory value to indicate that use of an explicit scaling list in an SPS (sequence parameter set) level is disabled. The value of the second syntax indicates that the use of the explicit scaling list is enabled or not in the SPS level. The explicit scaling list is derived from the video bitstream when the second syntax has a value other than the mandatory value. The current picture is decoded utilizing information comprising the explicit scaling list.

14. 发明申请

WO2020259631A1 SIGNALING CODING OF TRANSFORM-SKIPPED BLOCKS 审中-公开
公开(公告)号：WO2020259631A1
公开(公告)日：2020-12-30
申请号：PCT/CN2020/098271
申请日：2020-06-24
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta , CHEN, Lulin , CHUANG, Tzu-Der , HSU, Chih-Wei , CHEN, Ching-Yeh , CHUBACH, Olena , HUANG, Yu-Wen
IPC分类号： H04N19/103 , H04N19/46 , H04N19/146
摘要： A method for performing transform skip mode (TSM) in a video decoder is provided. A video decoder receives data from a bitstream to be decoded as a plurality of video pictures. The video decoder parses the bitstream for a first syntax element in a sequence parameter set (SPS) of a current sequence of video pictures. When the first syntax element indicates that transform skip mode is allowed for the current sequence of video pictures and when transform skip mode is used for a current block in a current picture of the current sequence, the video decoder reconstructs the current block by using quantized residual signals that are not transformed.

15. 发明申请

WO2020057359A1 METHODS AND APPARATUSES OF QUANTIZATION SCALING OF TRANSFORM COEFFICIENTS IN VIDEO CODING SYSTEM 审中-公开
公开(公告)号：WO2020057359A1
公开(公告)日：2020-03-26
申请号：PCT/CN2019/103943
申请日：2019-09-02
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/124
摘要： Processing methods and apparatuses for video data comprise receiving input data associated with a current transform block in a current video picture, determining if a size of the current transform block is a power of 4, determining a normalized quantization or dequantization scaling factor, generating transform coefficient levels by applying a quantization processing to scaled transform coefficients in the current transform block or generating scaled transform coefficients by applying an inverse quantization processing to transform coefficient levels in the current transform block, and encoding or decoding the current transform block. The quantization processing comprises scaling the scaled transform coefficients by the normalized quantization scaling factor and the inverse quantization processing comprises scaling the transform coefficient levels by the normalized dequantization scaling factor.

16. 发明申请

WO2020038311A1 METHOD AND APPARATUS OF TRANSFORM COEFFICIENT CODING 审中-公开
公开(公告)号：WO2020038311A1
公开(公告)日：2020-02-27
申请号：PCT/CN2019/101284
申请日：2019-08-19
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/70
摘要： A method and apparatus or decoding prediction residues in a video coding system are disclosed. According to this method, a first syntax element to a fourth syntax element are signalled or parsed in a first coding pass for at least sub-block. The current residual block is encoded or decoded using information comprising the first syntax element, the second syntax element, the third syntax element, and the fourth syntax element. The first syntax element indicates whether an absolute value of a current transform coefficient level is greater than 0. The second syntax element indicates whether the absolute value of the current transform coefficient level is greater than 1. The third syntax element indicates a parity of the current transform coefficient level. The fourth syntax element indicates whether the absolute value of the current transform coefficient level downward shifted by 1 is greater than 1.

17. 发明申请

WO2019184852A1 METHODS AND APPARATUS FOR SIGNALLING CODING UNIT PARTITIONING OF VIDEO DATA 审中-公开
公开(公告)号：WO2019184852A1
公开(公告)日：2019-10-03
申请号：PCT/CN2019/079458
申请日：2019-03-25
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta , LIN, Zhi-Yi , CHUANG, Tzu-Der , CHEN, Ching-Yeh , HSU, Chih-Wei
IPC分类号： H04N19/96 , H04N19/176
摘要： A method and apparatus of video coding for a video encoding system or video decoding system are disclosed. According to one method, the current block region is partitioned into one or more leaf blocks using quadtree (QT) partition and/or 1D (one-dimensional) partition by firstly signalling or parsing a first syntax element to indicate whether the current block region is split into multiple smaller blocks. According to a second method, a target syntax model from multiple syntax models is determined. The current block region is partitioned into one or more leaf blocks using QT partition and/or 1D partition and signalling block partition information according to the target syntax model at an encoder side, or the block partition information is parsed according to the target syntax model and the current block region is partitioned into one or more leaf blocks at a decoder side.

18. 发明申请

WO2019047763A1 METHODS AND APPARATUSES OF PROCESSING PICTURES IN AN IMAGE OR VIDEO CODING SYSTEM 审中-公开
公开(公告)号：WO2019047763A1
公开(公告)日：2019-03-14
申请号：PCT/CN2018/103213
申请日：2018-08-30
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/176
摘要： Picture processing methods and apparatuses in an image or video encoding or decoding system for processing a picture partitioned into multiple non-overlapped Coding Tree Units (CTUs). Input data of a current CTU is received and split into one or more CUs. A CU entirely inside picture boundaries is split by a splitting type selected from a first set of splitting types, and a CU not entirely inside the picture boundaries is split by a splitting type selected from a second set of splitting types. The second set of splitting type comprises at least two different splitting types to provide flexibility for each out-of-bounds CU to select a splitting type. The current CTU is encoded or decoded when it is partitioned into leaf CUs for prediction and transform processing.

19. 发明申请

WO2013189257A1 METHOD AND APPARATUS OF BI-DIRECTIONAL PREDICTION FOR SCALABLE VIDEO CODING 审中-公开
标题翻译：用于可缩放视频编码的双向预测的方法和装置
公开(公告)号：WO2013189257A1
公开(公告)日：2013-12-27
申请号：PCT/CN2013/077160
申请日：2013-06-13
申请人： MEDIATEK INC.
发明人： CHUANG, Tzu-Der , HUANG, Yu-Wen , CHEN, Ching-Yeh , TSAI, Chia-Yang , FU, Chih-Ming , HSIANG, Shih-Ta
IPC分类号： H04N7/32
CPC分类号： H04N19/30 , H04N19/31 , H04N19/33 , H04N19/36 , H04N19/50 , H04N19/51 , H04N19/52 , H04N19/587 , H04N19/59 , H04N19/593
摘要： A method and apparatus for inter-layer prediction for scalable video coding are disclosed. Embodiments of the present invention utilize weighted prediction for scalable coding. The weighted prediction is based on the predicted texture data and the inter-layer Intra prediction data derived from BL reconstructed data. The inter-layer Intra prediction data corresponds to the BL reconstructed data or up-sampled BL reconstructed data. The predicted texture data corresponds to spatial Intra prediction data or motion-compensated prediction data based on the second EL video data in the same layer as the current EL picture. Embodiments of the present invention also utilize the reference picture list including an inter-layer reference picture (ILRP) corresponding to BL reconstructed texture frame or up-sampled BL reconstructed texture frame for Inter prediction of EL video data. The motion vector is limited to a range around (0,0) when the ILRP is selected as a reference picture.
摘要翻译：公开了一种用于可分级视频编码的层间预测的方法和装置。本发明的实施例利用可扩展编码的加权预测。加权预测基于从BL重建数据导出的预测纹理数据和层间Intra预测数据。层内帧内预测数据对应于BL重构数据或上采样BL重构数据。预测纹理数据对应于基于与当前EL图像相同的层中的第二EL视频数据的空间帧内预测数据或运动补偿预测数据。本发明的实施例还使用包括对应于BL重构纹理帧或上采样BL重建纹理帧的层间参考图片（ILRP）的参考图片列表，用于EL视频数据的帧间预测。当选择ILRP作为参考图像时，运动矢量被限制在大约（0,0）的范围内。

20. 发明申请

WO2021088855A1 SIGNALING HIGH-LEVEL INFORMATION IN VIDEO AND IMAGE CODING 审中-公开
公开(公告)号：WO2021088855A1
公开(公告)日：2021-05-14
申请号：PCT/CN2020/126429
申请日：2020-11-04
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta
IPC分类号： H04N19/174 , H04N19/70
摘要： A method for for signaling high-level information in image and video coding is provided. A video decoder receives data from a bitstream to be decoded as a current picture of a video. The video decoder parses a picture header of the current picture that includes a set of one or more slice information syntax elements in the picture header for indicating presence of one or more types of slices that are present in the current picture. The video decoder reconstructs the slices of the current picture by using the set of slice information syntax elements.

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