公开(公告)号：US20180020222A1

公开(公告)日：2018-01-18

申请号：US15642586

申请日：2017-07-06

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Chung-Hua TSAI ,  Wei-Cing LI ,  Lien-Fei CHEN ,  Li-Heng CHEN ,  Han-Liang CHOU ,  Ting-An LIN ,  Yi-Hsin HUANG

IPC: H04N19/152 ,  H04N19/85 ,  H04N19/423

CPC classification number: H04N19/152 ,  H04N19/174 ,  H04N19/423 ,  H04N19/436 ,  H04N19/85 ,  H04N19/96

Abstract: An apparatus and method for video encoding with low latency is disclosed. The apparatus comprises a video encoding module to encode input video data into compressed video data, one or more processing modules to provide the input video data to the video encoding module or to further process the compressed video data from the video encoding module, and one data memory associated with each processing module to store or to provide shared data between the video encoding module and each processing module. The encoding module and each processing module are configured to manage data access of one data memory by coordinating one of the video encoding module and one processing module to receive target shared data from one data memory after the target shared data from another of the video encoding module and one processing module are ready in said one data memory.

公开(公告)号：US20180108331A1

公开(公告)日：2018-04-19

申请号：US15786240

申请日：2017-10-17

Applicant: MEDIATEK INC.

Inventor： Ping CHAO ,  Ting-An LIN ,  Tung-Hsing WU ,  Kung-Tsun YANG ,  Wan-Yu CHEN ,  Chuang-Chi CHIOU ,  Ping-yao WANG ,  Wei-Gen WU ,  Hsin-Hao CHUNG ,  Chih-Ming WANG ,  Han-Liang CHOU ,  Chung Hsien LEE ,  Yung-Chang CHANG ,  Chi-Cheng JU

IPC: G09G5/393 ,  G09G5/395

Abstract: Aspects of the disclosure provide a method for merging compressed access units according to compression rates and/or positions of the respective compressed access units. The method can include receiving a sequence of compressed access units corresponding to a sequence of raw access units partitioned from an image or a video frame and corresponding to a sequence of memory spaces in a frame buffer, determining a merged access unit including at least two consecutive compressed access units based on compression rates and/or positions of the sequence of compressed access units. The merged access unit is to be stored in the frame buffer with a reduced gap between the at least two consecutive compressed access units compared with storing the at least two consecutive compressed access units in corresponding memory spaces in the sequence of memory spaces.

公开(公告)号：US20160241875A1

公开(公告)日：2016-08-18

申请号：US14883883

申请日：2015-10-15

Applicant: MediaTek Inc.

Inventor： Tung-Hsing WU ,  Han-Liang CHOU

IPC: H04N19/593 ,  H04N19/423 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/423

Abstract: A method of IntraBC (Intra-block copy) coding for a coding region is disclosed. Embodiments of the present invention derive an IntraBC (Intra picture block copy) predictor from a constrained previous reconstructed region so as to reduce storage requirement for the previous reconstructed data. In one embodiment, a maximum absolute vertical BV (block vector) value, MaxV_BV is determined, where MaxV_BV is smaller than a full vertical search range for the coding region. A constrained previous reconstructed region corresponding to previous reconstructed samples processed before the current block is then determined, where the constrained previous reconstructed region includes at least MaxV_MV reconstructed samples in vertical direction above the current block and excludes at least one row of reconstructed samples for the current block with a vertical distance larger than MaxV_MV. Each coding block may correspond to a prediction unit (PU) or a coding unit (CU).

Abstract translation: 公开了一种用于编码区域的IntraBC（块内复制）编码方法。 本发明的实施例从约束的先前重构区域导出IntraBC（Intra图像块拷贝）预测器，以便减少对先前重构数据的存储要求。 在一个实施例中，确定最大绝对垂直BV（块向量）值MaxV_BV，其中MaxV_BV小于编码区域的完整垂直搜索范围。 然后确定对应于在当前块之前处理的先前重建样本的约束的先前重构区域，其中约束的先前重建区域在当前块上方包括在垂直方向上的至少MaxV_MV重建样本，并且排除当前的至少一行重构样本 块的垂直距离大于MaxV_MV。 每个编码块可以对应于预测单元（PU）或编码单元（CU）。

公开(公告)号：US20180027241A1

公开(公告)日：2018-01-25

申请号：US15651151

申请日：2017-07-17

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Li-Heng CHEN ,  Han-Liang CHOU

IPC: H04N19/167 ,  H04N19/176 ,  H04N19/147 ,  H04N19/119 ,  H04N19/124

CPC classification number: H04N19/167 ,  H04N19/119 ,  H04N19/124 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176

Abstract: A method and apparatus for video encoding with multi-level regions of interest is disclosed. According to the present invention, a target frame in the input video data is configured into multiple-level region-of-interest (ROI) regions. Each target higher-level ROI region is located within one target lower-level ROI region. The multiple-level ROI regions are then encoded according to a plurality of quality levels, where at least two different quality levels are applied to two different multiple-level ROI regions respectively.

公开(公告)号：US20170230687A1

公开(公告)日：2017-08-10

申请号：US15404313

申请日：2017-01-12

Applicant: MEDIATEK INC.

Inventor： Li-Heng CHEN ,  Tung-Hsing WU ,  Han-Liang CHOU

IPC: H04N19/593 ,  H04N19/174 ,  H04N19/182 ,  H04N19/91

Abstract: A method and apparatus of image coding including a no-residue prediction mode are disclosed. At the encoder side, current predictors for a current coding unit are determined according to a target prediction process associated with a target prediction mode. The current predictors are determined based on pixel data including reconstructed pixels in the current slice or the current image. The target prediction process is applied to the current coding unit using the current predictors to generate prediction residues. A distortion condition or a cost measure for the prediction residues is determined. If the distortion condition is satisfied or the cost measure favors coding without the prediction residues, the current coding unit is encoded into current compressed bits of the current coding unit without compressed data associated with the prediction residues. A corresponding decoding method and apparatus are also disclosed.

公开(公告)号：US20240080452A1

公开(公告)日：2024-03-07

申请号：US18350897

申请日：2023-07-12

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Chih-Hao CHANG ,  Yi-Fan CHANG ,  Han-Liang CHOU

IPC: H04N19/154 ,  H04N19/124 ,  H04N19/159 ,  H04N19/82

CPC classification number: H04N19/154 ,  H04N19/124 ,  H04N19/159 ,  H04N19/82

Abstract: A video encoder with quality estimation is shown. The video encoder has a video compressor, a video reconstructor, a quality estimator, and an encoder top controller. The video compressor receives the source data of a video to generate compressed data. The video reconstructor is coupled to the video compressor for generation of playback-level data that is buffered for inter prediction by the video compressor, wherein the video reconstructor generates intermediate data and, based on the intermediate data, the video reconstructor generates playback-level data. The quality estimator is coupled to the video reconstructor to receive the intermediate data. Quality estimation is performed based on the intermediate data rather than the playback-level data. Based on the quality estimation result, the encoder top controller adjusts at least one video compression factor in real time.

公开(公告)号：US20180213253A1

公开(公告)日：2018-07-26

申请号：US15926070

申请日：2018-03-20

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Han-Liang CHOU

IPC: H04N19/593 ,  H04N19/423 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/423

Abstract: A method and apparatus for IntraBC (Intra-block copy) coding for a coding region are disclosed. The method operates to receive input data associated with a current block in the coding region and determine a maximum memory size of a reconstructed sample memory for storing a constrained previous reconstructed region, wherein the constrained previous reconstructed region comprises a group of previous reconstructed samples processed before the current block. The method then derives an IntraBC predictor from a valid previous reconstructed region within the constrained previous reconstructed region stored in the reconstructed sample memory, and applies IntraBC encoding or decoding to the current block using the IntraBC predictor derived.

公开(公告)号：US20170085888A1

公开(公告)日：2017-03-23

申请号：US15229506

申请日：2016-08-05

Applicant: MediaTek Inc.

Inventor： Tung-Hsing WU ,  Li-Heng CHEN ,  Han-Liang CHOU

IPC: H04N19/164 ,  H04L1/00 ,  H04N19/15 ,  H04N19/159 ,  H04N19/107 ,  H04N19/172 ,  H04L12/26

CPC classification number: H04N19/164 ,  H04L1/0018 ,  H04L43/16 ,  H04N19/107 ,  H04N19/114 ,  H04N19/15 ,  H04N19/159 ,  H04N19/172 ,  H04N19/65 ,  H04N19/89

Abstract: A method and apparatus of encoding frames with a frame type structure adaptively according to a current encoding status after receiving a request for an IDR frame or receiving an indication of picture data loss are disclosed. If the check result of the current encoding status is true, the second frame type structure is the same as the first frame type structure; and if the check result of the current encoding status is false, the second frame type structure is different from the first frame type structure. Another method and apparatus of encoding frames with a reference frame structure and a frame type structure adaptively according to one or more current encoding statuses after receiving an indication of picture data loss are disclosed. The system may use two different check results to adaptively select the reference frame structure and the frame type structure.

公开(公告)号：US20170310987A1

公开(公告)日：2017-10-26

申请号：US15485283

申请日：2017-04-12

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Li-Heng CHEN ,  Han-Liang CHOU

IPC: H04N19/513 ,  H04N19/122 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/174

CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/124 ,  H04N19/147 ,  H04N19/51 ,  H04N19/593

Abstract: A method and apparatus of image coding performed at an encoder or decoder using block prediction are disclosed. The block vector bit-count information associated with one or more block vectors (BVs) for the current block is determined, where the BVs are used to locate one or more block predictors for the current block. Prediction residuals corresponding to differences between the current block and the block predictors are determined. A first cost comprising the BV and residual bit-count information associated with encoding the prediction residuals using the first coding tool is determined. The second cost comprising the BV bit-count information and without the residual bit-count information is also determined. The derivation of the BV bit-count information and the prediction residuals for the current block are performed only once, and the BV bit-count information and the prediction residuals are used by the first coding tool and the second coding tool.

公开(公告)号：US20170188026A1

公开(公告)日：2017-06-29

申请号：US15386022

申请日：2016-12-21

Applicant: MEDIATEK INC.

Inventor： Tung-Hsing WU ,  Li-Heng CHEN ,  Han-Liang CHOU

IPC: H04N19/112 ,  H04N19/136 ,  H04N19/44 ,  H04N19/13 ,  H04N19/184

CPC classification number: H04N19/112 ,  H04N19/13 ,  H04N19/136 ,  H04N19/184 ,  H04N19/44 ,  H04N19/593

Abstract: A method and apparatus of image coding including adaptive entropy coding are disclosed. According to this method, input pixels associated with a group of symbols generated from image or video data are received. Maximum bit-depth of the group of symbols is then determined. If the maximum bit-depth of the group of symbols is smaller than a first bit-depth threshold, the group of symbols is encoded or decoded using Golomb-Rice coding. If the maximum bit-depth of the group of symbols is greater than or equal to the first bit-depth threshold, the group of symbols is encoded or decoded using second entropy coding, where the second entropy coding is different from the Golomb-Rice coding. Outputs corresponding to encoded or decoded output associated with the group of symbols are provided. The maximum bit-depth of the group of symbols is signaled at the encoder or recovered at the decoder by parsing the bitstream.