公开(公告)号：US20190253730A1

公开(公告)日：2019-08-15

申请号：US16394712

申请日：2019-04-25

申请人： Imagination Technologies Limited

发明人： Steven Fishwick

IPC分类号： H04N19/513 ,  H04N19/182 ,  H04N19/172 ,  H04N5/14 ,  H04N7/01 ,  H04N19/577 ,  H04N19/167

CPC分类号： H04N19/513 ,  H04N5/145 ,  H04N7/014 ,  H04N19/167 ,  H04N19/172 ,  H04N19/182 ,  H04N19/577

摘要： A motion estimation technique finds first and second candidate bi-directional motion vectors for a first region of an interpolated frame of video content by performing double ended vector motion estimation on the first region. One of these candidate bi-directional motion vectors is selected, and used to identify a remote region of the interpolated frame. This remote region is located at an off-set location from the first region, and is found based on an endpoint of the selected candidate bi-directional motion vector. A remote motion vector for the remote region of the interpolated frame is obtained, and one or more properties of this remote motion vector are used to bias a selection between the first and second candidate vectors.

公开(公告)号：US20190215522A1

公开(公告)日：2019-07-11

申请号：US16238815

申请日：2019-01-03

申请人： QUALCOMM Incorporated

发明人： Li Zhang ,  Wei-Jung Chien ,  Kai Zhang ,  Marta Karczewicz

IPC分类号： H04N19/186 ,  H04N19/176 ,  H04N19/196 ,  H04N19/105 ,  H04N19/159

CPC分类号： H04N19/186 ,  H04N19/105 ,  H04N19/117 ,  H04N19/136 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/577 ,  H04N19/597 ,  H04N19/82

摘要： A method of processing video data includes classifying, by processing circuitry, luma samples of a neighboring luma block of a reference block and luma samples of a neighboring luma block of a current block into a plurality of groups and deriving, by the processing circuitry, one or more local illumination compensation parameters for each group of the plurality of groups to generate a plurality of local illumination compensation parameters for the current block. The method further includes deriving, by the processing circuitry, a plurality of linear models between the neighboring luma block of the reference block and the neighboring luma block of the current block using the plurality of local illumination compensation parameters for the current block and generating, by the processing circuitry, a prediction block using the plurality of linear models.

公开(公告)号：US20190200036A1

公开(公告)日：2019-06-27

申请号：US16291514

申请日：2019-03-04

申请人： Panasonic Intellectual Property Corporation of America

发明人： Shinya KADONO ,  Satoshi KONDO ,  Makoto HAGAI ,  Kiyofumi ABE

IPC分类号： H04N19/52 ,  H04N19/587 ,  G06F1/03 ,  H04N19/30 ,  H04N19/625 ,  H04N21/2743 ,  H04N19/503 ,  H04N19/124 ,  H04N19/105 ,  H04N19/513 ,  H04N19/577 ,  H04N19/43 ,  H04N19/61 ,  H04N19/51

CPC分类号： H04N19/52 ,  G06F1/03 ,  G06F2101/12 ,  H04N19/105 ,  H04N19/124 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/43 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/577 ,  H04N19/587 ,  H04N19/61 ,  H04N19/625 ,  H04N21/2743

摘要： A motion vector derivation unit includes a comparison unit for comparing a parameter TR1 for a reference vector with a predetermined value to determine whether it exceeds the predetermined value or not; a switching unit for switching selection between the maximum value of a pre-stored parameter TR and the parameter TR1 according to the comparison result by the comparison unit; a multiplier parameter table (for multipliers); and a multiplier parameter table (for divisors) for associating the parameter TR1 with a value approximate to the inverse value (1/TR1) of this parameter TR1.

公开(公告)号：US20190037233A1

公开(公告)日：2019-01-31

申请号：US16145429

申请日：2018-09-28

申请人： Cisco Technology, Inc.

发明人： Arild Fuldseth ,  Gisle Bjontegaard

IPC分类号： H04N19/52 ,  H04N19/577 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/105

CPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/577

摘要： Techniques for direct mode video coding/decoding techniques. According to one embodiment, various blocks in B frames may use motion vectors from different reference frames (P frames or B frames), according to what is referred to herein as a patchwork motion field. Different blocks of a given frame may use motion vectors inherited from different frames for purposes of computing a predicted block for the given frame.

公开(公告)号：US20180376136A1

公开(公告)日：2018-12-27

申请号：US16118973

申请日：2018-08-31

申请人： Godo Kaisha IP Bridge 1

发明人： Kiyofumi ABE ,  Shinya KADONO ,  Satoshi KONDO

IPC分类号： H04N19/103 ,  H04N19/573 ,  H04N19/172 ,  H04N19/577 ,  H04N19/16 ,  H04N19/176 ,  H04N19/61 ,  H04N19/513 ,  H04N19/109

CPC分类号： H04N19/103 ,  H04N19/109 ,  H04N19/16 ,  H04N19/172 ,  H04N19/176 ,  H04N19/513 ,  H04N19/573 ,  H04N19/577 ,  H04N19/61

摘要： A moving picture coding apparatus includes a motion compensation coding unit for deciding a coding mode for coding a current block to be coded and for generating predictive image data based on the coding mode, and includes a direct mode enable/disable judgment unit for judging whether or not scaling processing can be performed when the coding mode decided by the motion compensation coding unit is a temporal direct mode. When it is judged that the scaling processing cannot be performed, the motion compensation coding unit performs motion compensation either by using another coding mode or without the scaling processing.

公开(公告)号：US20180332302A1

公开(公告)日：2018-11-15

申请号：US16043678

申请日：2018-07-24

申请人： Tagivan II LLC

发明人： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toru MATSUNOBU ,  Kengo TERADA

IPC分类号： H04N19/56 ,  H04N19/513 ,  H04N19/577 ,  H04N19/573 ,  H04N19/117 ,  H04N19/52 ,  H04N19/51

CPC分类号： H04N19/56 ,  H04N19/117 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/573 ,  H04N19/577

摘要： Obtaining one or more motion vector predictor candidates includes: (a1) generating a motion vector predictor candidate, based on motion vectors of first adjacent blocks adjacent to a block to be processed in a first direction; and (a2) generating a motion vector predictor candidate, based on motion vectors of second adjacent blocks adjacent to the block to be processed in a second direction, and step (a2) (S500) includes: (S520) determining whether the first adjacent blocks include an inter-predicted block; and (S530) searching for a motion vector on which scaling processing can be performed from among the motion vectors of the second adjacent blocks when it is determined that the first adjacent blocks do not include an inter-predicted block, and executing, when the motion vector on which scaling processing can be performed is obtained in the search, scaling processing on the motion vector obtained in the search.

公开(公告)号：US20180295385A1

公开(公告)日：2018-10-11

申请号：US15575717

申请日：2016-06-03

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Alexander ALSHIN ,  Mikhail MISHUROVSKIY

IPC分类号： H04N19/70 ,  H04N19/176 ,  H04N19/159 ,  H04N19/577 ,  H04N19/52 ,  H04N19/44

CPC分类号： H04N19/70 ,  H04N19/109 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/44 ,  H04N19/52 ,  H04N19/577

摘要： Provided are image encoding and decoding methods and apparatuses using weighted bi-prediction. The image decoding method and apparatus according to one embodiment obtain one or more prefixes including a first counter value indicating the number of additional syntax elements subsequent to main syntax elements from a received bitstream, obtain the additional syntax elements including weight information and information about whether to perform weighted bi-prediction on prediction units separated for predicting a current block, based on the one or more prefixes, and generate a prediction block including a prediction value, based on the main syntax elements and the additional syntax elements.

公开(公告)号：US20180262774A1

公开(公告)日：2018-09-13

申请号：US15911185

申请日：2018-03-05

申请人： MEDIATEK INC.

发明人： Hung-Chih Lin ,  Jian-Liang Lin ,  Shen-Kai Chang

IPC分类号： H04N19/597 ,  G06T3/60 ,  H04N19/172

CPC分类号： H04N19/597 ,  G06T3/60 ,  G06T2200/04 ,  H04N19/172 ,  H04N19/577

摘要： A video processing method includes: receiving a first input frame with a 360-degree Virtual Reality (360 VR) projection format; applying first content-oriented rotation to the first input frame to generate a first content-rotated frame; encoding the first content-rotated frame to generate a first part of a bitstream, including generating a first reconstructed frame and storing a reference frame derived from the first reconstructed frame; receiving a second input frame with the 360 VR projection format; applying second content-oriented rotation to the second input frame to generate a second content-rotated frame; configuring content re-rotation according to the first content-oriented rotation and the second content-oriented rotation; applying the content re-rotation to the reference frame to generate a re-rotated reference frame; and encoding, by a video encoder, the second content-rotated frame to generate a second part of the bitstream, including using the re-rotated reference frame for predictive coding of the second content-rotated frame.

公开(公告)号：US20180255319A1

公开(公告)日：2018-09-06

申请号：US15759215

申请日：2016-09-14

申请人： THOMSON Licensing

发明人： Dominique THOREAU ,  Mikael LE PENDU ,  Martin ALAIN ,  Mehmet TURKAN

IPC分类号： H04N19/597 ,  H04N19/103 ,  H04N19/172 ,  H04N13/161 ,  G06T15/20

CPC分类号： H04N19/597 ,  G06T15/205 ,  H04N13/161 ,  H04N19/103 ,  H04N19/15 ,  H04N19/172 ,  H04N19/577

摘要： 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.

公开(公告)号：US20180249172A1

公开(公告)日：2018-08-30

申请号：US15754683

申请日：2016-08-31

申请人： MEDIATEK INC.

发明人： Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yi-Wen CHEN ,  Yu-Chen SUN ,  Yu-Wen HUANG

IPC分类号： H04N19/513 ,  H04N19/182 ,  H04N19/176

CPC分类号： H04N19/513 ,  G06T7/269 ,  H04N19/176 ,  H04N19/182 ,  H04N19/521 ,  H04N19/53 ,  H04N19/54 ,  H04N19/577

摘要： A method and apparatus of motion compensation using the bi-directional optical flow (BIO) techniques are disclosed. According to one method, the use of BIO is extended to general bi-prediction motion compensation by including the case that two reference pictures correspond to two previously coded pictures. According to another method, the use of BIO is adaptively applied depending on the linearity of the two motion vectors associated with the two reference blocks or depending on block size of the current block. According to yet another method, the refined motion vectors by compensating the original motion vectors with the respective x-offset values and y-offset values are stored in a motion-vector buffer for motion vector prediction of one or more following blocks.