公开(公告)号：US20140226725A1

公开(公告)日：2014-08-14

申请号：US14256971

申请日：2014-04-20

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Yi-Wen Chen ,  Yu-Pao Tsai ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N19/51

CPC classification number: H04N19/513 ,  H04N19/52

Abstract: An apparatus and method of deriving a motion vector predictor (MVP) for a current MV of a current block in Inter, Merge or Skip mode are disclosed based on motion vector (MV) attribute search. The system determines first MV attribute search comprising whether a given MV pointing to the target reference picture in the given reference list, or whether the given MV pointing to the target reference picture in other reference list, and determines second MV attribute search comprising whether the given MV pointing to other reference pictures in the given reference list, or whether the given MV pointing to the other reference pictures in the other reference list. The MVP for the current block is then determined from the neighboring blocks according to a search order.

Abstract translation: 基于运动矢量（MV）属性搜索，公开了针对Inter，Merge或者Skip模式中的当前块的当前MV的导出运动矢量预测器（MVP）的装置和方法。 系统确定第一MV属性搜索，其包括指定给定参考列表中的目标参考图片的给定MV，或者指定给定MV在其他参考列表中的目标参考图片，以及确定第二MV属性搜索，包括是否给定 MV指向给定参考列表中的其他参考图片，或者给定MV是否指向另一个参考列表中的其他参考图片。 然后根据搜索顺序从相邻块确定当前块的MVP。

公开(公告)号：US11765349B2

公开(公告)日：2023-09-19

申请号：US16557686

申请日：2019-08-30

Applicant: MEDIATEK INC.

Inventor： Sheng Yen Lin ,  Lin Liu ,  Jian-Liang Lin

IPC: H04N19/117 ,  H04N19/172 ,  H04N19/70 ,  H04N19/61

CPC classification number: H04N19/117 ,  H04N19/172 ,  H04N19/61 ,  H04N19/70

Abstract: Method and apparatus of coding pictures containing one or more virtual boundaries, such as 360-degree virtual reality (VR360) video are disclosed. According to this method, a reconstructed filtered unit associated with a loop filter for a current reconstructed pixel is received. The loop filtering process associated with the loop filter is applied to the current reconstructed pixel to generate a filtered reconstructed pixel, where if the loop filtering process for the current reconstructed pixel is across a virtual boundary of the picture, the loop filtering process is disabled when fixed-size loop filtering is used or a smaller-size loop filter is selected when adaptive-size loop filtering is used for the current reconstructed pixel, where the filtered reconstructed pixel is the same as the current reconstructed pixel when the loop filtering process is disabled. The filtered reconstructed pixel is the same as the current reconstructed pixel.

公开(公告)号：US11659206B2

公开(公告)日：2023-05-23

申请号：US16917917

申请日：2020-07-01

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/70 ,  H04N19/184

CPC classification number: H04N19/70 ,  H04N19/184

Abstract: A video decoding method includes: decoding a part of a bitstream to generate a decoded frame, and parsing at least one syntax element from the bitstream. The decoded frame is a projection-based frame that includes projection faces packed in a cube-based projection layout. At least a portion of a 360-degree content of a sphere is mapped to the projection faces via cube-based projection. The at least one syntax element is indicative of a guard band configuration of the projection-based frame.

公开(公告)号：US11494870B2

公开(公告)日：2022-11-08

申请号：US16639118

申请日：2018-08-17

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Peng Wang ,  Ya-Hsuan Lee ,  Hung-Chih Lin ,  Shen-Kai Chang

IPC: G06T3/00 ,  H04N19/597 ,  H04N19/85 ,  G06T19/20 ,  H04N19/86

Abstract: An exemplary video processing method includes: receiving an omnidirectional content corresponding to a sphere; obtaining a plurality of projection faces from the omnidirectional content of the sphere according to a pyramid projection; creating at least one padding region; and generating a projection-based frame by packing the projection faces and the at least one padding region in a pyramid projection layout. The projection faces packed in the pyramid projection layout include a first projection face. The at least one padding region packed in the pyramid projection layout includes a first padding region. The first padding region connects with at least the first projection face, and forms at least a portion of one boundary of the pyramid projection layout.

公开(公告)号：US20210398245A1

公开(公告)日：2021-12-23

申请号：US17143164

申请日：2021-01-07

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  H04N13/161 ,  G06T3/60

Abstract: A video processing method includes: decoding a part of a bitstream to generate a decoded frame, where the decoded frame is a projection-based frame that includes projection faces in a hemisphere cubemap projection layout; and remapping sample locations of the projection-based frame to locations on the sphere, where a sample location within the projection-based frame is converted into a local sample location within a projection face packed in the projection-based frame; in response to adjustment criteria being met, an adjusted local sample location within the projection face is generated by applying adjustment to one coordinate value of the local sample location within the projection face, and the adjusted local sample location within the projection face is remapped to a location on the sphere; and in response to the adjustment criteria not being met, the local sample location within the projection face is remapped to a location on the sphere.

公开(公告)号：US11095912B2

公开(公告)日：2021-08-17

申请号：US17075724

申请日：2020-10-21

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: H04N19/00 ,  H04N19/44 ,  H04N19/169 ,  H04N19/186 ,  H04N19/132

Abstract: A video decoding method includes decoding a part of a bitstream to generate a decoded frame. The decoded frame is a projection-based frame that comprises at least one projection face and at least one guard band packed in a projection layout. At least a portion of a 360-degree content of a sphere is mapped to the at least one projection face via projection. The decoded frame is in a 4:2:0 chroma format or a 4:2:2 chroma format, and a guard band size of each of the at least one guard band is equal to an even number of luma samples.

公开(公告)号：US11089335B2

公开(公告)日：2021-08-10

申请号：US16737377

申请日：2020-01-08

Applicant: MEDIATEK INC.

Inventor： Sheng Yen Lin ,  Jian-Liang Lin ,  Lin Liu

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/46 ,  H04N19/117

Abstract: Method and apparatus of coding a video sequence are disclosed. According to this method, a first syntax is signalled in or parsed from a bitstream, where the first syntax indicates whether a loop filtering process is disabled for one or more virtual boundaries in a corresponding region. A reconstructed filter unit in a current picture is received, wherein the reconstructed filter unit is associated with the loop filter and the reconstructed filter unit comprises reconstructed pixels for applying a loop filtering process associated with the loop filter to a current reconstructed pixel. When the first syntax is true, the loop filter processing is disabled when the reconstructed filter unit is across said one or more virtual boundaries in the corresponding region. When the first syntax is false, the loop filter processing is not disabled when the reconstructed filter unit is across the virtual boundary.

公开(公告)号：US11069026B2

公开(公告)日：2021-07-20

申请号：US16286622

申请日：2019-02-27

Applicant: MEDIATEK INC.

Inventor： Ya-Hsuan Lee ,  Jian-Liang Lin

IPC: G06T3/00 ,  G06T7/13 ,  G06T3/40

Abstract: A video processing method includes: obtaining a plurality of square projection faces from an omnidirectional content of a sphere according to a cube-based projection, scaling the square projection faces to generate a plurality of scaled projection faces, respectively, creating at least one padding region, generating a projection-based frame by packing the scaled projection faces and said at least one padding region in a projection layout of the cube-based projection, and encoding the projection-based frame to generate a part of a bitstream.

公开(公告)号：US10999595B2

公开(公告)日：2021-05-04

申请号：US15776154

申请日：2016-11-08

Applicant: MEDIATEK INC.

Inventor： Jian-Liang Lin ,  Tzu-Der Chuang ,  Yu-Wen Huang ,  Yi-Wen Chen

IPC: H04N19/517 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A method and apparatus of priority-based MVP (motion vector predictor) derivation for motion compensation in a video encoder or decoder are disclosed. According to this method, one or more final motion vector predictors (MVPs) are derived using priority-based MVP derivation process. The one or more final MVPs are derived by selecting one or more firstly available MVs from a priority-based MVP list for Inter prediction mode, Skip mode or Merge mode based on reference data of one or two target reference pictures that are reconstructed prior to the current block according to a priority order. Therefore, there is no need for transmitting information at the encoder side nor deriving information at the decoder side that is related to one or more MVP indices to identify the one or more final MVPs in the video bitstream.

公开(公告)号：US10944989B2

公开(公告)日：2021-03-09

申请号：US15561110

申请日：2016-03-31

Applicant: MEDIATEK INC.

Inventor： Yi-Wen Chen ,  Jicheng An ,  Jian-Liang Lin ,  Yu-Wen Huang

IPC: H04N19/593 ,  H04N19/96 ,  H04N19/186 ,  H04N19/105 ,  H04N19/157 ,  H04N19/176 ,  H04N19/122

Abstract: A method and apparatus for Intra prediction of non-square chroma blocks are disclosed. The system uses a block partitioning structure for partitioning a chroma block into one or more final sub-blocks including at least one non-square final sub-block using block partition recursively. The block partition either splits each given block into intermediate sub-blocks using one or more split modes including one binary split mode or applies no splitting to each given block. The block is treated as an initial given block and each intermediate sub-block is treated as one given block in a next recursion. Any given block that is not further split becomes a final sub-block. After the final sub-blocks are determined, non-square Intra prediction is applied to each non-square final sub-block.