公开(公告)号：US20200045322A1

公开(公告)日：2020-02-06

申请号：US16338514

申请日：2017-09-28

Applicant: MEDIATEK INC.

Inventor： Jing YE ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/11 ,  H04N19/105 ,  H04N19/159

Abstract: A method and apparatus for video coding of chroma coded in derived-mode Intra prediction are disclosed. If derived-mode (DM) Intra prediction is selected for a current chroma block, a corresponding luma block area is determined by locating a first upper-left pixel address of the corresponding luma block area corresponding to that of the current chroma block; one or more candidate luma coding modes are determined from a sub-block set consisting of one or more sub-blocks of the corresponding luma block area, where if the sub-block set consists of only one sub-block, the sub-block set excludes a corner sub-block located at a top-left corner of the corresponding luma block area; a current chroma Intra mode for the current chroma block is derived based on information comprising the candidate luma coding modes; and Intra-prediction encoding or decoding is applied to the current chroma block using the current chroma Intra mode derived.

公开(公告)号：US20190222859A1

公开(公告)日：2019-07-18

申请号：US16301772

申请日：2017-05-26

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Chen SUN ,  Yu-Wen HUANG ,  Shan LIU ,  Xiaozhong XU

IPC: H04N19/52 ,  H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96 ,  H04N19/119

CPC classification number: H04N19/52 ,  H04N19/00 ,  H04N19/105 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/436 ,  H04N19/513 ,  H04N19/70 ,  H04N19/96

Abstract: A method and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, the luma and chroma blocks of the current image are jointly coded using a same coding unit (CU) structure if the CPR mode is selected for the luma and the chroma blocks. Alternatively, if the luma and chroma components are partitioned into the luma and the chroma blocks separately using separate CU structures, the luma and chroma blocks are encoded or decoded using a coding mode selected from a coding mode group excluding the CPR mode. According to another method, the luma and chroma blocks of the current image are coded separately using a different CU structure if the CPR mode is selected for the luma and chroma blocks. In yet another method, reconstructed reference data is disclosed for the CPR mode with CU equal to PU.

公开(公告)号：US20190215521A1

公开(公告)日：2019-07-11

申请号：US16335435

申请日：2017-09-18

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Zhi-Yi LIN ,  Jing YE ,  Shan LIU

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/55 ,  H04N19/105 ,  H04N19/139

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44 ,  H04N19/503 ,  H04N19/51 ,  H04N19/55 ,  H04N19/593

Abstract: Methods and apparatus using decoder-side Intra mode derivation (DIMD) are disclosed. According to one method, two-mode DIMD is used, where two DIMD modes are developed. The DIMD predictors for the two DIMD modes are derived. A final DIMD predictor is derived by blending the two DIMD predictors. In a second method, the DIMD mode is combined with a normal Intra mode to derive a combined DIMND-Intra predictor. In a third method, the DIMD mode is combined with an Inter mode to derive a combined DIMD-Inter predictor. Various blending methods to combine the DIMD mode and another mode are also disclosed.

公开(公告)号：US20190045238A1

公开(公告)日：2019-02-07

申请号：US16072913

申请日：2017-02-03

Applicant: MEDIATEK INC.

Inventor： Wang-Lin LAI ,  Shan LIU ,  Lulin CHEN

IPC: H04N21/2387 ,  H04N21/647 ,  H04N21/845 ,  H04N21/858 ,  H04L12/805 ,  H04L29/06 ,  H04L29/08

CPC classification number: H04N21/2387 ,  H04L47/365 ,  H04L65/00 ,  H04L65/4084 ,  H04L67/02 ,  H04L69/04 ,  H04N21/25 ,  H04N21/64746 ,  H04N21/6587 ,  H04N21/8456 ,  H04N21/8586

Abstract: A method and system of message exchange for controlling flow associated with multimedia streaming services from a server to a client using DASH are disclosed. In one method, one or more Push Directives are sent from a client to a server to indicate information related to media data requested. At least one selected Push Directive uses one URLTemplate that comprises a list of media parameter values, and where each media parameter value corresponds to one media parameter associated with one media segment requested. The server then pushes one or more groups of data for the media data requested to the client according to the list of media parameter values. In another method, at least one selected Push Directive uses one URLTemplate that includes a first number to represent a number of repeating difference of media parameter values associated with requested media segments.

公开(公告)号：US20180131969A1

公开(公告)日：2018-05-10

申请号：US15806632

申请日：2017-11-08

Applicant: MEDIATEK INC.

Inventor： Han HUANG ,  Shan LIU ,  Chih-Wei HSU

IPC: H04N19/86 ,  H04N19/176 ,  H04N19/117 ,  H04N19/196 ,  H04N19/167 ,  H04N19/105

Abstract: Aspects of the disclosure provide a method of video coding includes receiving input data associated with a first block and a second block of an image frame. The method further includes identifying a reference size and performing a deblocking process if it is determined that the deblocking process is to be performed. The preforming the deblocking process may include processing pixels adjacent to the block boundary using a first set of deblocking filter settings if a first block size of the first block and a second block size of the second block are greater than the reference size, and processing the pixels using a second set of deblocking filter settings if the first block size or the second block size is not greater than the reference size.

公开(公告)号：US20180131963A1

公开(公告)日：2018-05-10

申请号：US15564205

申请日：2016-04-13

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Shan LIU ,  Xiaozhong XU

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

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/51 ,  H04N19/70

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：US20170318302A1

公开(公告)日：2017-11-02

申请号：US15520575

申请日：2015-11-06

Applicant: MEDIATEK INC.

Inventor： Jing YE ,  Shan LIU ,  Xiaozhong XU

IPC: H04N19/186 ,  H04N19/96 ,  H04N19/119

CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/463 ,  H04N19/593 ,  H04N19/70 ,  H04N19/90 ,  H04N19/96

Abstract: A method of palette coding to apply the palette coding to sub-blocks of a coding unit and to allow each sub-block to use an individual palette table is disclosed. If the current coding block is not partitioned, the palette coding is applied to the current coding block using a first palette. If the current coding block is partitioned into multiple sub-blocks, the palette coding is applied to each sub-block using an individual second palette. Each sub-block may correspond to one prediction unit (PU). In another embodiment of the present invention, a method is disclosed that skips update of palette predictor such as last coded palette table, last coded palette size and palette predictor size associated with the current coding block if the current palette size is smaller than or equal to palette update size.

公开(公告)号：US20170310959A1

公开(公告)日：2017-10-26

申请号：US15521513

申请日：2015-10-28

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/182 ,  H04N19/176 ,  H04N19/117 ,  H04N19/82 ,  H04N19/11

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/182 ,  H04N19/593 ,  H04N19/82

Abstract: A method of Intra prediction filtering to determine whether to turn on or off the Intra prediction filter based on interleaved Intra prediction mode sets implicitly is disclosed. In one embodiment, initial Intra prediction block is derived based on neighboring reconstructed pixels of the current block. If the Intra prediction filter is on for the current Intra prediction mode, the Intra prediction filter is applied to the initial Intra prediction block to form a filtered Intra prediction block and Intra prediction encoding or decoding is applied to the current block using the filtered Intra prediction block as a predictor for the current block. For example, Intra gradient filter can be applied for even modes of Intra prediction modes from v to (v+8) and/or from h and (h+8). Bi-directional Intra prediction filter can be applied to some or all other modes.

公开(公告)号：US20170289572A1

公开(公告)日：2017-10-05

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

CPC classification number: H04N19/593 ,  G06F17/271 ,  H04N19/184 ,  H04N19/70

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：US20200021819A1

公开(公告)日：2020-01-16

申请号：US16581077

申请日：2019-09-24

Applicant: MEDIATEK INC.

Inventor： Xiaozhong XU ,  Shan LIU

IPC: H04N19/159 ,  H04N19/152 ,  H04N19/134

Abstract: A method for a video encoder or decoder using an Intra Block Copy (IntraBC) mode is disclosed. If IntraBC mode is enabled and no loop filter is used for a current picture, a currently decoded reference picture for the current picture is marked as a long-term reference picture before and during decoding of the current picture. The currently decoded reference picture is assigned in reference picture list construction for IntraBC reference of the current picture and buffer fullness for the DPB is calculated before starting decoding the current picture by taking into account of only one reference picture buffer. According to another method, if the maximum DPB size is 1, a variable or a syntax element is set to a target value to impose restriction to use only one picture storage buffer in the DPB to store reference picture for encoding or decoding of a current picture.