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：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.

公开(公告)号：US20170134734A1

公开(公告)日：2017-05-11

申请号：US15331059

申请日：2016-10-21

Applicant: MEDIATEK INC.

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

IPC: H04N19/176

CPC classification number: H04N19/176 ,  H04N19/119 ,  H04N19/154 ,  H04N19/182 ,  H04N19/186 ,  H04N19/91

Abstract: Method and apparatus of image coding using block prediction (BP) allowing multiple block sizes are disclosed. According to one method, first distortion for the current block coded using BP with a first block size is derived using at least partial second distortion for the current block coded using BP with a first block size. According to another method, a flag indicating whether the BP using variable block sizes is enabled. According to yet another method, when a current block is coded using BP by partitioning the current block into multiple partitions, predictors for two partitions in different reconstructed pixel line groups are derived from different reconstructed pixel line groups. According to still yet another method, for coding image data in a non-444 color sampling format using BP, the predictors for chrominance pixels in the current block are derived from the predictors for the luminance pixels of the current block.

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.