公开(公告)号：US20180249158A1

公开(公告)日：2018-08-30

申请号：US15754694

申请日：2016-08-29

Applicant: MEDIATEK INC.

Inventor： Yu-Wen HUANG ,  Yu-Chen SUN ,  Tzu-Der CHUANG ,  Jian-Liang LIN ,  Ching-Yeh CHEN

IPC: H04N19/117 ,  H04N19/50 ,  H04N19/182 ,  H04N19/82 ,  G06N3/04

CPC classification number: H04N19/117 ,  G06N3/04 ,  G06N3/08 ,  G06T5/001 ,  H04N19/182 ,  H04N19/50 ,  H04N19/82 ,  H04N19/86 ,  H04N19/91

Abstract: A method and apparatus of video coding incorporating Deep Neural Network are disclosed. A target signal is processed using DNN (Deep Neural Network), where the target signal provided to DNN input corresponds to the reconstructed residual, output from the prediction process, the reconstruction process, one or more filtering processes, or a combination of them. The output data from DNN output is provided for the encoding process or the decoding process. The DNN can be used to restore pixel values of the target signal or to predict a sign of one or more residual pixels between the target signal and an original signal. An absolute value of one or more residual pixels can be signalled in the video bitstream and used with the sign to reduce residual error of the target signal.

公开(公告)号：US20180249154A1

公开(公告)日：2018-08-30

申请号：US15754721

申请日：2016-09-02

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG ,  Jian-Liang LIN ,  Yu-Chen SUN ,  Yi-Ting SHEN

IPC: H04N19/105 ,  H04N19/567 ,  H04N19/176 ,  H04N19/57

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

公开(公告)号：US20180152714A1

公开(公告)日：2018-05-31

申请号：US15578221

申请日：2016-06-03

Applicant: MEDIATEK INC.

Inventor： Yu-Chen SUN ,  Tzu-Der CHUANG ,  Han-Liang CHOU ,  Chia-Yun Cheng ,  Ching-Yeh CHEN ,  Yu-Wen Huang

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/423 ,  H04N19/433 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

Abstract: Methods of palette coding to reduce the required coding process are disclosed. According to one method, smaller blocks are derived from a large block. The histogram of the large block is derived based on the histograms of smaller blocks in the large block. According to another method, one or more palette tables are derived based on multiple blocks. One palette table is used for each of the multiple blocks. According to yet another method, index map transpose is performed in the parsing stage according to the transpose flag of the index map. Accordingly, a buffer to store the transpose flags can be saved. According to still yet another method, the palette predictor update is performed using an index mapping table to avoid the need for shuffling the contents of the palette predictor stored in a palette buffer.

公开(公告)号：US20160309183A1

公开(公告)日：2016-10-20

申请号：US15101139

申请日：2014-12-26

Applicant: MEDIATEK INC.

Inventor： Yu-Chen SUN ,  Jungsun KIM ,  Tzu-Der CHUANG ,  Yi-Wen CHEN ,  Wang Lin LAI ,  Shan LIU ,  Yu-Wen HUANG

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/593 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186

Abstract: A method and apparatus for color index coding of a block of video data using index prediction based on reconstructed neighboring pixels are disclosed. In one embodiment, color index encoding or decoding is applied to the current pixel indices by deriving index prediction from neighboring pixel indices of the reconstructed neighboring pixels. The reconstructed neighboring pixel values are first transformed into the neighboring pixel indices according to a quantization table to map between major color indices and major color values of the current block. The quantization table can be based on a major color table for the current block or can also be derived at a decoder side. The decoding process may reconstruct the current pixels by converting decoded current pixel indices to reconstructed current pixel values according to the quantization table or by directly copying the reconstructed neighboring pixel values indicated by decoded current pixel indices.

Abstract translation: 公开了使用基于重构的相邻像素的索引预测对视频数据块进行颜色索引编码的方法和装置。 在一个实施例中，通过从重建的相邻像素的相邻像素索引导出索引预测，将颜色索引编码或解码应用于当前像素索引。 首先根据量化表将重建的相邻像素值变换为相邻像素索引，以在主要颜色索引和当前块的主要颜色值之间进行映射。 量化表可以基于当前块的主色表或也可以在解码器侧得到。 解码处理可以通过根据量化表将解码的当前像素索引转换为重构的当前像素值或通过直接复制由解码的当前像素索引指示的重建的相邻像素值来重构当前像素。

公开(公告)号：US20160301938A1

公开(公告)日：2016-10-13

申请号：US15038599

申请日：2015-01-07

Applicant: MediaTek Inc.

Inventor： Yu-Chen SUN ,  Tzu-Der CHUANG ,  Yi-Wen CHEN ,  Yu-Wen HUANG

IPC: H04N19/186 ,  H04N19/93 ,  H04N19/182 ,  H04N19/463 ,  H04N19/176

Abstract: A method and apparatus for coding a block of video data using index or pixel value prediction including a copy-by-pattern-search mode are disclosed. According to the present invention, a current search pattern is determined based on one or more previous coded pixels. One or more predictors are derived according to the current search pattern for a current index or pixel value of a current pixel in the current block. Encoding or decoding is then applied to one or more following indices or pixel values of one or more following pixels including the current pixel using the predictors. In a simplest case, the one or more previous coded pixels correspond to a single previous coded pixel at the left side of the current pixel and the one or more following pixels contain only the current pixel.

Abstract translation: 公开了一种使用包括逐模式搜索模式的索引或像素值预测对视频数据块进行编码的方法和装置。 根据本发明，基于一个或多个以前的编码像素来确定当前搜索模式。 根据当前搜索模式导出当前块中当前像素的当前索引或像素值的一个或多个预测值。 然后，使用预测器将编码或解码应用于包括当前像素的一个或多个跟随像素的一个或多个跟随索引或像素值。 在最简单的情况下，一个或多个先前的编码像素对应于当前像素左侧的单个先前编码像素，并且一个或多个跟随像素仅包含当前像素。

公开(公告)号：US20200288145A1

公开(公告)日：2020-09-10

申请号：US16304207

申请日：2017-05-26

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Yu-Chen SUN ,  Shan LIU ,  Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Xiaozhong XU ,  Wang-Lin LAI ,  Jing YE

IPC: H04N19/157 ,  H04N19/11 ,  H04N19/119 ,  H04N19/129 ,  H04N19/176 ,  H04N19/186

Abstract: Methods and apparatus for a coding system using palette mode coding for colour video are disclosed. According to method, when the palette mode is enabled, separate coding of luma and chroma components is disabled or if separate coding of luma and chroma components, the palette mode is disabled. According to another method, when the palette mode is enabled for the current image, palette mode coding is only applied to the luma blocks and non-palette mode coding is applied to the chroma blocks. According to yet another method, palette mode coding is applied to the luma blocks using luma palettes if the palette mode is selected for the luma blocks and palette mode coding applying to the chroma blocks using chroma palettes if the palette mode is selected for the chroma blocks. According to yet another method, the scan direction for a non-square CU depends on the shape of the non-square.

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：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：US20220078418A1

公开(公告)日：2022-03-10

申请号：US17526678

申请日：2021-11-15

Applicant: MEDIATEK INC.

Inventor： Yu-Wen HUANG ,  Yu-Chen SUN ,  Tzu-Der CHUANG ,  Jian-Liang LIN ,  Ching-Yeh CHEN

IPC: H04N19/117 ,  H04N19/82 ,  G06T5/00 ,  H04N19/86 ,  H04N19/182 ,  H04N19/50 ,  G06N3/04

Abstract: A method and apparatus of video coding incorporating Deep Neural Network are disclosed. A target signal is processed using DNN (Deep Neural Network), where the target signal provided to DNN input corresponds to the reconstructed residual, output from the prediction process, the reconstruction process, one or more filtering processes, or a combination of them. The output data from DNN output is provided for the encoding process or the decoding process. The DNN can be used to restore pixel values of the target signal or to predict a sign of one or more residual pixels between the target signal and an original signal. An absolute value of one or more residual pixels can be signalled in the video bitstream and used with the sign to reduce residual error of the target signal.

公开(公告)号：US20190289320A1

公开(公告)日：2019-09-19

申请号：US16431062

申请日：2019-06-04

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Chia-Yun CHENG ,  Han-Liang CHOU ,  Ching-Yeh CHEN ,  Yu-Chen SUN ,  Yu-Wen HUANG

IPC: H04N19/563 ,  H04N19/70 ,  H04N19/513 ,  H04N19/593

Abstract: In order to overcome the issue caused by a decoded block vector (BV) pointing to a reference block overlapping with an unavailable area, various methods are disclosed. According to one method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by padding from neighbouring available pixels. The padding can be done in the horizontal direction and then the vertical direction. The padding may also done in the vertical direction first and then horizontal direction. In another method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by using previous decoded pixels in the unavailable area. A pre-defined value may also be used for the unavailable area.