公开(公告)号：US11178404B2

公开(公告)日：2021-11-16

申请号：US16405246

申请日：2019-05-07

Applicant: MEDIATEK INC.

Inventor： Xiaozhong Xu ,  Shan Liu

IPC: H04N19/159 ,  H04N19/11 ,  H04N19/46 ,  H04N19/196 ,  H04N19/593 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: Aspects of the disclosure include a method for video coding. The method includes receiving input data associated with a current block in an image frame, selecting a reference pixel set from a plurality of candidate neighboring pixel sets adjacent to an edge of the current block, generating an intra predictor of the current block based on the selected reference pixel set and an intra prediction mode of the current block, and encoding or decoding the current block based on the intra predictor to output encoded video data or a decoded block. Each set of the candidate neighboring pixel sets is arranged in parallel with the edge of the current block.

公开(公告)号：US10735761B2

公开(公告)日：2020-08-04

申请号：US15966570

申请日：2018-04-30

Applicant: MEDIATEK INC.

Inventor： Han Huang ,  Xiaozhong Xu ,  Tzu-Der Chuang

IPC: H04N19/517 ,  H04N19/56 ,  H04N19/57 ,  H04N19/105 ,  H04N19/176

Abstract: Aspects of the disclosure include a video decoding device that includes a processing circuit. The processing circuit is configured to receive encoded video data associated with a current block of a current image frame, determine a set of candidate motion vectors for the current block, determine a selection index based on the encoded video data, and select one of the set of candidate motion vectors based on the selection index. The processing circuit is further configured to refine the selected candidate motion vector to become a reconstructed motion vector when the selected candidate motion vector meets a predetermined condition, and generate an image of the current image frame for output, including generating a reconstructed image of the current block based on the reconstructed motion vector.

公开(公告)号：US10448049B2

公开(公告)日：2019-10-15

申请号：US15505972

申请日：2015-09-02

Applicant: MEDIATEK INC.

Inventor： Jing Ye ,  Shan Liu ,  Jungsun Kim ,  Wang-Lin Lai ,  Tzu-Der Chuang ,  Yu-Chen Sun ,  Xiaozhong Xu

IPC: H04N19/00 ,  H04N19/593 ,  H04N19/70 ,  H04N19/184 ,  G06F17/27

Abstract: A method for color index coding of blocks in a picture is disclosed. In one embodiment for the decoder side, a current coding mode is parsed from the input coded bitstream for one or more first currently decoded pixels in a current block starting from a first starting position. If the current coding mode corresponds to a generalized copy-previous-row mode, one or more first reference pixels starting from a first starting reference position located at T-th row above the first currently decoded pixels are identified, where T is an integer equal to or greater than one. The first reference pixels starting from the first starting reference position are then used to decode the first currently decoded pixels starting from a first starting position by copying the first reference pixels starting from the first starting reference position respectively. The system may also include a copy-left mode or escape mode.

公开(公告)号：US10432966B2

公开(公告)日：2019-10-01

申请号：US15564205

申请日：2016-04-13

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Shan Liu ,  Xiaozhong Xu

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/70 ,  H04N19/51

Abstract: A method and apparatus of video coding using IntraBC (Intra Block Copy) for video data are disclosed. Restricted prediction is determined, in which one or more selected PU (prediction unit) sizes, PU prediction types or both are disabled or disallowed. Video coding is applied to the current block using coding modes including IntraBC prediction in accordance with the restricted prediction. The selected PU sizes, PU prediction types or both may correspond to 8×8 bi-prediction PU. In one example, the selected PU sizes, PU prediction types or both are disabled or disallowed for the restricted prediction except one or more conditions are determined to be satisfied. The conditions may correspond to at least one of two motion vectors of the 8×8 bi-prediction PU having integer values, the conditions may also correspond to at least one of motion vector components of the 8×8 bi-prediction PU having integer valueIntraBCIntraBCIntraBCIntraBCIntraBC.

公开(公告)号：US20180075576A1

公开(公告)日：2018-03-15

申请号：US15668836

申请日：2017-08-04

Applicant: MEDIATEK INC.

Inventor： Shan Liu ,  Xiaozhong Xu

IPC: G06T3/00 ,  H04N13/00 ,  G06T3/40

CPC classification number: G06T3/0062 ,  G06T3/4038 ,  G06T2207/20021 ,  H04N13/161

Abstract: Aspects of the disclosure provide a method for packing a two-dimensional (2D) projected image of a spherical image in an omnidirectional video sequence to form a compact image. The method can include receiving a 2D projected image generated by projecting a spherical image of an omnidirectional video onto faces of a platonic solid. The 2D projected image has regions each corresponding to a face of the platonic solid. The method can further include rearranging the regions to form a compact image. At least two nonadjacent regions in the 2D projected image corresponding to two faces that are adjacent to each other along an edge on the platonic solid are arranged to be adjacent to each other along the same edge in the compact image. As a result, continuity between the two nonadjacent regions can be maintained.