公开(公告)号：WO2019147880A1

公开(公告)日：2019-08-01

申请号：PCT/US2019/015065

申请日：2019-01-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： GALPIN, Franck ,  CHEN, Ya ,  BORDES, Philippe

IPC: H04N19/52 ,  H04N19/577 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/136

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/577

Abstract: Inferring an illumination compensation flag during encoding or decoding of a video image signal using frame rate up conversion can save one bit and eliminate complexity. The illumination compensation flag can be derived from the corresponding flags of at least one bi-predictive or bi-directional prediction candidates. The flag can also be derived from some function of the flags from those candidates. Alternatively, several flags can be used for respective coding or decoding of blocks if there are more than one prediction candidate using illumination compensation.

公开(公告)号：WO2019110120A1

公开(公告)日：2019-06-13

申请号：PCT/EP2017/082047

申请日：2017-12-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  ESENLIK, Semih

Inventor： ESENLIK, Semih ,  ZHAO, Zhijie ,  KOTRA, Anand, Meher ,  GAO, Han

IPC: H04N19/56 ,  H04N19/513 ,  H04N19/44 ,  H04N19/61 ,  H04N19/577

CPC classification number: H04N19/56 ,  H04N19/44 ,  H04N19/513 ,  H04N19/521 ,  H04N19/577 ,  H04N19/61

Abstract: The present disclosure relates to motion vector determination based on template matching for bi-directional motion vector estimation. In particular, a block template is constructed as an average of blocks pointed to by initial motion vectors to be refined. Then, the motion vector refinement is performed by template matching in two different reference pictures. The matching is performed by finding an optimum (minimum or maximum, depending on the function) of a matching function corresponding to the best matching block in each of the two reference pictures. The optimum is searched for zero-mean template and a zero-mean candidate block (among the block positions pointed to by the motion vector candidates of the search space). In other words, before performing the function optimization, a mean of the template is subtracted from the template and a mean of the candidate block is subtracted from the candidate block. The predictor of the current block is then calculated as a weighted average of these best matching blocks in the respective reference pictures.

公开(公告)号：WO2018205781A1

公开(公告)日：2018-11-15

申请号：PCT/CN2018/082158

申请日：2018-04-08

Applicant: 武汉斗鱼网络科技有限公司

Inventor： 徐超 ,  陈少杰 ,  张文明

IPC: H04N19/513

CPC classification number: H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/57 ,  H04N19/577 ,  H04N19/593

Abstract: 本发明公开了一种实现运动估计的方法及电子设备，先将视频帧划分为16*16的像素子块，然后计算所述16*16像素子块的第一运动矢量和第一误差值；在将16*16像素子块划分为4个8*8像素子块计算第二运动矢量和第二误差值；对比第一运动矢量和第二运动矢量；若第一误差值大于第二误差值，再将16*16像素子块划分为16个4*4像素子块计算第三运动矢量和第三误差值；再次和第二误差值进行对比，进而选用最小误差的宏块分割和运动矢量进行运动估计。本发明利用对比方式确定出具体的运动估计所需的运动矢量，能够降低数据量节约时间，提高压缩率。

公开(公告)号：WO2018061503A1

公开(公告)日：2018-04-05

申请号：PCT/JP2017/029411

申请日：2017-08-15

Applicant: 株式会社ドワンゴ

Inventor： 佐藤　数史

IPC: H04N19/105 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/577

CPC classification number: H04N19/105 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/577

Abstract: 好適な双方向予測を可能とする符号化装置、符号化方法、復号化装置、及び復号化方法を提供する。　第１参照画像及び第２参照画像を含む複数の参照画像を記憶するフレームメモリと、入力動画像中の符号化対象画像のうちの符号化対象領域が参照する第１及び第２参照画像内の第１及び第２領域の位置を定める第１及び第２動きベクトルを求める手段と、第１領域に適用される第１重み係数、及び第２領域に適用される第２重み係数を定める重み係数決定手段と、第１領域内の画素の画素値に第１重み係数を乗算すると共に、第２領域内の画素の画素値に第２重み係数を乗算することにより、符号化対象領域に対する予測画素値を算出する手段とを備え、輝度信号に対して適用される第１重み係数及び第２重み係数と、色差信号に対して適用される第１重み係数及び第２重み係数とは、異なる値を取り得る。

Abstract translation: 提供了能够进行适当的双向预测的编码设备，编码方法，解码设备和解码方法。 用于将输入的运动图像的编码目标图像中存储多个参考图像，包括第一参考画面和第二参考图像，在第一和第二参考图片编码对象区域的帧存储器被引用 用于获得定义第一和第二区域的位置的第一和第二运动矢量的装置;用于确定应用于第一区域的第一加权因子和用于定义应用于第二区域的第二加权因子的加权因子的装置 将第一区域中的像素的像素值乘以第一加权因子，并将第二区域中的像素的像素值乘以第二加权系数，从而计算预测像素 并且应用于亮度信号的第一加权系数和第二加权系数以及应用于色差信号的第一加权系数和第二加权系数是不同的值 在可以采取。

公开(公告)号：WO2017157281A1

公开(公告)日：2017-09-21

申请号：PCT/CN2017/076622

申请日：2017-03-14

Applicant: MEDIATEK INC.

Inventor： CHUANG, Tzu-Der ,  CHEN, Ching-Yeh ,  HUANG, Yu-Wen

IPC: H04N19/52 ,  H04N19/56 ,  H04N19/176 ,  H04N19/577

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/56 ,  H04N19/577

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, merge index for merge candidate group comprising bilateral matching merge candidate and/or template matching merge candidate are signalled using different codewords. According to another method, the first-stage MV or the first-stage MV pair is used as an only initial MV or MV pair or used as a central MV of search window for second-stage search. According to yet another method, after the reference template for a first reference list is found, the current template is modified for template search in the other reference list. According to yet another method, the sub-PU search is disabled for the template search. According to yet another method, block difference calculation is based on reduced bit depth during MV search associated with the decoder-side MV derivation process.

Abstract translation: 公开了使用基于双边匹配或模板匹配的解码器导出的运动信息的视频编码方法和装置。 根据一种方法，使用不同码字来发信号通知包括双边匹配合并候选者和/或模板匹配合并候选者的用于合并候选者组的合并索引。 根据另一种方法，第一级MV或第一级MV对用作唯一的初始MV或MV对或用作第二级搜索的搜索窗的中央MV。 根据另一种方法，在找到第一参考列表的参考模板之后，修改当前模板以用于其他参考列表中的模板搜索。 根据另一种方法，针对模板搜索禁用子PU搜索。 根据另一种方法，块差异计算基于与解码器侧MV导出过程相关联的MV搜索期间缩小的比特深度。

公开(公告)号：WO2017133661A1

公开(公告)日：2017-08-10

申请号：PCT/CN2017/072826

申请日：2017-02-03

Applicant: MEDIATEK INC.

Inventor： CHEN, Ching-Yeh ,  CHUANG, Tzu-Der ,  HUANG, Yu-Wen

IPC: H04N19/51

CPC classification number: H04N19/537 ,  H04N19/105 ,  H04N19/159 ,  H04N19/182 ,  H04N19/186 ,  H04N19/46 ,  H04N19/513 ,  H04N19/52 ,  H04N19/577

Abstract: Methods and apparatus of motion compensation using the bi-directional optical flow (BIO) techniques are disclosed. According to one method of the present invention, the BIO process is applied to encode or decode bi-directional current block in Merge mode only or in AMVP (advanced motion vector prediction) mode only. According to another method, the BIO process conditionally to encode or decode the current block depending on a jointly-coded flag if the current block is coded using a bi-prediction mode. According to yet another method, x-offset value v x and y-offset value v y for the current block are added to the current motion vector to form a final motion vector. The final motion vector is then used as a reference motion vector for following blocks. In still yet another method, the BIO process is applied to the chroma component.

Abstract translation: 公开了使用双向光流（BIO）技术的运动补偿的方法和设备。 根据本发明的一个方法，BIO过程仅用于仅在合并模式下或在AMVP（高级运动矢量预测）模式下对双向当前块进行编码或解码。 根据另一种方法，如果使用双预测模式对当前块进行编码，则BIO过程有条件地根据联合编码标志对当前块进行编码或解码。 根据另一种方法，当前块的x偏移值vx和y偏移值vy被添加到当前运动矢量以形成最终运动矢量 。 最终的运动矢量然后被用作后续块的参考运动矢量。 在另一种方法中，BIO过程应用于色度分量。

公开(公告)号：WO2017046176A1

公开(公告)日：2017-03-23

申请号：PCT/EP2016/071717

申请日：2016-09-14

Applicant: THOMSON LICENSING

Inventor： THOREAU, Dominique ,  ALAIN, Martin ,  TURKAN, Mehmet ,  GUILLOTEL, Philippe

IPC: H04N19/597 ,  H04N19/172 ,  H04N19/15 ,  H04N19/103 ,  H04N19/577

CPC classification number: H04N19/103 ,  H04N19/15 ,  H04N19/172 ,  H04N19/577 ,  H04N19/597

Abstract: The present disclosure generally relates to a method for predicting at least one block of pixels of a view (170) belonging to a matrix of views (17) obtained from light-field data belong with a scene. According to present disclosure, the method is implemented by a processor and comprises for at least one pixel to predict of said block of pixels: ‐ from said matrix of views (17), obtaining (51) at least one epipolar plane image (EPI) belong with said pixel to predict, ‐ among a set of unidirectional prediction modes, determining (52) at least one optimal unidirectional prediction mode from a set of previous reconstructed pixels neighboring said pixel to predict in said at least one epipolar plane image, ‐ extrapolating (53) a prediction value of said pixel to predict by using said at least one optimal unidirectional prediction mode.

Abstract translation: 本公开通常涉及一种用于预测属于由属于场景的光场数据获得的视图矩阵（17）的视图（170）的至少一个像素块的方法。 根据本公开，该方法由处理器实现，并且包括用于至少一个像素来预测所述像素块： - 从所述视图矩阵（17）获得（51）至少一个对极平面图像（EPI） 属于所述像素以预测在一组单向预测模式中，从邻近所述像素的一组先前重建像素确定（52）至少一个最优单向预测模式，以在所述至少一个对极平面图像中进行预测; - 推断 （53）通过使用所述至少一个最优单向预测模式来预测所述像素的预测值。

公开(公告)号：WO2017046175A1

公开(公告)日：2017-03-23

申请号：PCT/EP2016/071716

申请日：2016-09-14

Applicant: THOMSON LICENSING

Inventor： THOREAU, Dominique ,  LE PENDU, Mikael ,  ALAIN, Martin ,  TURKAN, Mehmet

IPC: H04N19/597 ,  H04N19/172 ,  H04N19/15 ,  H04N19/103 ,  H04N19/577

CPC classification number: H04N19/597 ,  H04N19/103 ,  H04N19/15 ,  H04N19/172 ,  H04N19/577

Abstract: The present disclosure generally relates to a method for predicting at least one block of pixels of a view (170) belonging to a matrix of views (17) obtained from light-field data belong with a scene, According to present disclosure, the method is implemented by a processor and comprises for at least one pixel to predict of said block of pixels: - from said matrix of views (17), obtaining (51) at least one epipolar plane image (EPI) belong with said at least one pixel to predict, - among a set of bidirectional prediction modes, determining (52) at least one optimal bidirectional prediction mode from a set of previous reconstructed pixels neighbouring said at least one pixel to predict in said at least one epipolar plane image, - extrapolating (53) a prediction value of said at least one pixel to predict by using said at least one optimal bidirectional prediction mode.

Abstract translation: 本公开总体上涉及一种用于预测属于从属于场景的光场数据获得的视图矩阵（17）的视图（170）的至少一个像素块的方法。根据本公开，该方法是 由处理器实现并且包括用于至少一个像素来预测所述像素块： - 从所述视图矩阵（17）获得（51）至少一个对极平面图像（EPI）属于所述至少一个像素到 预测 - 在一组双向预测模式中，从所述至少一个像素相邻的一组先前重建像素确定（52）至少一个最佳双向预测模式，以在所述至少一个对极平面图像中预测 - 外推（53） ）所述至少一个像素的预测值，以便通过使用所述至少一个最佳双向预测模式进行预测。

公开(公告)号：WO2016200100A1

公开(公告)日：2016-12-15

申请号：PCT/KR2016/005908

申请日：2016-06-03

Applicant: 삼성전자 주식회사

Inventor： 알쉰알렉산더 ,  미슈로브스키미카엘

IPC: H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/51

CPC classification number: H04N19/577 ,  H04N19/109 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/70

Abstract: 가중치 양방향 예측을 이용한 영상 부호화, 복호화 방법 및 장치가 개시된다. 개시된 일 실시예에 따른 영상 복호화 방법 및 장치는 수신한 비트스트림으로부터 주 신택스 요소들에 후속하는 부가 신택스 요소들의 개수를 나타내는 제 1 카운터 값을 포함하는 하나 이상의 프리픽스를 획득하고, 하나 이상의 프리픽스에 기초하여, 현재 블록의 예측을 위해 구분된 예측 단위들의 가중치 양방향 예측의 수행 여부에 관한 정보 및 가중치 정보를 포함하는 부가 신택스 요소들을 획득하고, 주 신택스 요소들 및 부가 신택스 요소들에 기초하여 예측 값을 포함하는 예측 블록을 생성한다.

Abstract translation: 公开了一种使用权重双向预测对图像进行编码和解码的方法和装置。 根据公开的一个实施例的用于解码图像的方法和装置：获得一个或多个前缀，其包括指示来自接收的比特流的主语法元素之后的附加语法元素的数量的第一计数器值; 获取附加语法元素，其包括权重信息和关于是否对所分离的用于预测当前块的预测单元进行权重双向预测的信息，基于所述一个或多个前缀; 并且基于主语法元素和附加语法元素生成包括预测值的预测块。

公开(公告)号：WO2016180486A1

公开(公告)日：2016-11-17

申请号：PCT/EP2015/060480

申请日：2015-05-12

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： SKUPIN, Robert ,  SANCHEZ, Yago ,  SCHIERL, Thomas

IPC: H04N21/2343 ,  H04N7/15 ,  H04N19/30 ,  H04N19/597

CPC classification number: H04N19/187 ,  H04N5/23238 ,  H04N5/265 ,  H04N7/15 ,  H04N7/152 ,  H04N19/105 ,  H04N19/139 ,  H04N19/152 ,  H04N19/196 ,  H04N19/30 ,  H04N19/503 ,  H04N19/51 ,  H04N19/577 ,  H04N19/597 ,  H04N21/23424 ,  H04N21/234327 ,  H04N21/23605 ,  H04N21/2365

Abstract: Video streaming concepts are presented. According to a first aspect, the video stream is formed as a multi-layered data stream with forming a set of one or more layers of the multi-layered data stream by copying from the coded version of the video content, while a composition of the at least one video is synthesized in at least a portion of pictures of a predetermined layer of the multi-layer data stream by means of inter-layer prediction. According to a second aspect, inter-layer prediction is used to either substitute otherwise missing referenced pictures of a newly encompassed video by inserting replacement pictures, or portions of the newly encompassed video referencing, by motion- compensated prediction, pictures which are missing are replaced by inter-layer prediction. According to a third aspect, output pictures inserted into the composed video stream so as to synthesize the composition of the video content by copying from a no-output portion of the composed data stream by temporal prediction, are inserted into the composed data stream so that output pictures are arranged in the data stream in the presentation time order rather than the coded picture order.

Abstract translation: 提供视频流概念。 根据第一方面，视频流形成为多层数据流，通过从视频内容的编码版本复制而形成多层数据流的一个或多个层的集合，同时， 通过层间预测，在多层数据流的预定层的图像的至少一部分中合成至少一个视频。 根据第二方面，层间预测用于通过插入替换图像或新近包含的视频参考的部分通过运动补偿预测来代替新近包含的视频的丢弃的参考图片，替换丢失的图片 通过层间预测。 根据第三方面，插入到合成视频流中的输出图像被插入到组合数据流中，以便通过从时间预测的组合数据流的非输出部分复制来合成视频内容的组合，使得 输出图像以呈现时间顺序而不是编码图像顺序排列在数据流中。