公开(公告)号：US20240080470A1

公开(公告)日：2024-03-07

申请号：US18381951

申请日：2023-10-19

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu

IPC分类号： H04N19/513 ,  H04N19/105 ,  H04N19/117 ,  H04N19/142 ,  H04N19/146 ,  H04N19/17 ,  H04N19/179 ,  H04N19/23 ,  H04N19/426 ,  H04N19/46 ,  H04N19/58 ,  H04N19/82

CPC分类号： H04N19/513 ,  H04N19/105 ,  H04N19/117 ,  H04N19/142 ,  H04N19/146 ,  H04N19/17 ,  H04N19/179 ,  H04N19/23 ,  H04N19/426 ,  H04N19/46 ,  H04N19/58 ,  H04N19/82

摘要： Innovations in flexible reference picture management are described. For example, a video encoder and video decoder use a global reference picture set (“GRPS”) of reference pictures that remain in memory, and hence are available for use in video encoding/decoding, longer than conventional reference pictures. In particular, reference pictures of the GRPS remain available across random access boundaries. Or, as another example, a video encoder and video decoder clip a reference picture so that useful regions of the reference picture are retained in memory, while unhelpful or redundant regions of the reference picture are discarded. Reference picture clipping can reduce the amount of memory needed to store reference pictures or improve the utilization of available memory by providing better options for motion compensation. Or, as still another example, a video encoder and video decoder filter a reference picture to remove random noise (e.g., capture noise due to camera imperfections during capture).

公开(公告)号：US11889058B2

公开(公告)日：2024-01-30

申请号：US17689724

申请日：2022-03-08

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Lu Yu ,  Xuguang Zuo ,  Yin Zhao ,  Haitao Yang

IPC分类号： H04N19/105 ,  H04N19/503 ,  H04N19/142 ,  H04N19/172 ,  H04N19/58 ,  H04N19/159 ,  H04N19/184 ,  G06V20/40 ,  H04N19/23 ,  H04N19/87

CPC分类号： H04N19/105 ,  H04N19/142 ,  H04N19/159 ,  H04N19/172 ,  H04N19/184 ,  H04N19/503 ,  H04N19/58 ,  G06V20/46 ,  H04N19/23 ,  H04N19/87

摘要： A picture encoding/decoding method and a related apparatus are provided. The picture decoding method includes obtaining a current picture from a video, the current picture being segmented using random access points into multiple video segments supporting a random access function; selecting, from a knowledge base, K reference pictures of the current picture, wherein at least one reference picture in the knowledge base does not belong to a random access segment in which the current picture is located, the random access segment comprising a picture sequence arranged in a decoding order from a closest random access point before the current picture to a closest random access point after the current picture; and decoding the current picture according to the K reference pictures.

公开(公告)号：US11825103B2

公开(公告)日：2023-11-21

申请号：US17825167

申请日：2022-05-26

申请人： Apple Inc.

发明人： Maneli Noorkami ,  Ranjit Desai

IPC分类号： H04N19/23 ,  G06F3/01 ,  G11B27/02

CPC分类号： H04N19/23 ,  G06F3/013 ,  G11B27/02

摘要： Systems and methods for gaze-driven recording of video are described. Some implementations may include accessing gaze data captured using one or more gaze-tracking sensors; applying a temporal filter to the gaze data to obtain a smoothed gaze estimate; determining a region of interest based on the smoothed gaze estimate, wherein the region of interest identifies a subset of a field of view; accessing a frame of video; recording a portion of the frame associated with the region of interest as an enhanced frame of video, wherein the portion of the frame corresponds to a smaller field of view than the frame; and storing, transmitting, or displaying the enhanced frame of video.

公开(公告)号：US20230300323A1

公开(公告)日：2023-09-21

申请号：US18201296

申请日：2023-05-24

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Minhua Zhou

IPC分类号： H04N19/105 ,  H04N19/503 ,  H04N19/46 ,  H04N19/23 ,  H04N19/159 ,  H04N19/174 ,  H04N19/186 ,  H04N19/196

CPC分类号： H04N19/105 ,  H04N19/503 ,  H04N19/46 ,  H04N19/23 ,  H04N19/159 ,  H04N19/174 ,  H04N19/186 ,  H04N19/196

摘要： A method for encoding a picture of a video sequence in a bit stream that reduces slice header parsing overhead is provided. The method includes determining weighting factors that may be used for weighted prediction in encoding at least one slice of the picture, wherein a total number of the weighting factors is constrained to not exceed a predetermined threshold number of weighting factors, wherein the threshold number is less than a maximum possible number of weighting factors, and signaling weighted prediction parameters including the weighting factors in a slice header in the bit stream.

公开(公告)号：US10080016B2

公开(公告)日：2018-09-18

申请号：US13038129

申请日：2011-03-01

申请人： Wei Liu ,  Lina Dong

发明人： Wei Liu ,  Lina Dong

IPC分类号： H04N7/26 ,  H04N19/50 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/593 ,  H04N19/11 ,  H04N19/463 ,  H04N19/186 ,  H04N19/23 ,  H04N19/93

CPC分类号： H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/23 ,  H04N19/46 ,  H04N19/463 ,  H04N19/50 ,  H04N19/593 ,  H04N19/61 ,  H04N19/93

摘要： Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 5 different modes defined in AVC: vertical, horizontal, DC, diagonal down right, and “same as luma”. Statistics show that the “same as luma” mode is frequent used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard.

公开(公告)号：US09961345B2

公开(公告)日：2018-05-01

申请号：US13894417

申请日：2013-05-14

申请人： Luca Rossato ,  Guido Meardi

发明人： Luca Rossato ,  Guido Meardi

IPC分类号： H04N19/23 ,  H04N19/59 ,  H04N19/126 ,  H04N19/63 ,  H04N19/62 ,  H04N19/33 ,  H04N19/87 ,  H04N19/94 ,  H04N19/50 ,  G06T7/246 ,  H04N19/136 ,  G06T7/20 ,  H04N19/635

CPC分类号： H04N19/126 ,  G06T7/248 ,  H04N19/136 ,  H04N19/23 ,  H04N19/33 ,  H04N19/50 ,  H04N19/59 ,  H04N19/62 ,  H04N19/63 ,  H04N19/635 ,  H04N19/87 ,  H04N19/94

摘要： Decoder processor hardware reproduces a support plane including a set of support values. The set of support values is derived from combining a sequence of multiple original sets of values. The decoder processor hardware receives compensation information. The decoder processor hardware utilizes the compensation information to produce preliminary renditions of the multiple original sets of values based on the set of support values. Encoder processor hardware processes a sequence of original sets of values. The encoder processor hardware utilizes the values of the original sets in the sequence to produce a set of support values, the set of support values representing a baseline to reproduce a rendition of each of the original sets of values. The encoder processor hardware generates reconstruction data to include data corresponding to the set of support values, the reconstruction data indicates how to reconstruct the original sets of values using the set of support values.

公开(公告)号：US09871967B2

公开(公告)日：2018-01-16

申请号：US14603212

申请日：2015-01-22

申请人： Huddly AS

发明人： Jan Tore Korneliussen ,  Anders Eikenes ,  Håvard Pedersen Alstad ,  Stein Ove Eriksen ,  Eamonn Shaw

IPC分类号： H04N19/167 ,  H04N5/232 ,  H04N19/23 ,  H04N19/94

CPC分类号： H04N5/23238 ,  H04N5/23229 ,  H04N19/17 ,  H04N19/23 ,  H04N19/503 ,  H04N19/597 ,  H04N19/94

摘要： Systems and methods are provided for alleviating bandwidth limitations of video transmission and enhancing the quality of videos at a receiver. In particular, an improved video transmission system is provided for generating high-resolution videos. The systems have therein a transmitter and a receiver; the transmitter includes an outer encoder and a core encoder, while the receiver includes a core decoder and an outer decoder. The outer encoder is adapted to receive the video from a source and separately output a salient video and an encoded background, and the outer decoder is adapted to merge the background with the salient video thereby producing an enhanced video. Also provided is a system that simulates pan-tilt-zoom (PTZ) operations without PTZ hardware. Further provided are methods for video transmission whereby a background model is initialized, a background independently encoded, updated incrementally, and the background and the updates transmitted independently from the video.

公开(公告)号：US20180014012A1

公开(公告)日：2018-01-11

申请号：US15711555

申请日：2017-09-21

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Lu YU ,  Xuguang ZUO ,  Yin ZHAO ,  Haitao YANG

IPC分类号： H04N19/105 ,  H04N19/159 ,  H04N19/184 ,  H04N19/87 ,  G06K9/00 ,  G06K9/46 ,  H04N19/23

CPC分类号： H04N19/105 ,  G06K9/00744 ,  G06K9/4671 ,  H04N19/142 ,  H04N19/159 ,  H04N19/172 ,  H04N19/184 ,  H04N19/23 ,  H04N19/503 ,  H04N19/58 ,  H04N19/87

摘要： A picture encoding/decoding method and a related apparatus are provided. The picture decoding method includes obtaining a current picture; selecting, from a knowledge base, K reference pictures of the current picture, where at least one picture in the knowledge base does not belong to a random access segment in which the current picture is located and wherein K is an integer greater than or equal to 1; and decoding the current picture according to the K reference pictures.

公开(公告)号：US09743078B2

公开(公告)日：2017-08-22

申请号：US13797644

申请日：2013-03-12

申请人： Euclid Discoveries, LLC

发明人： Darin DeForest ,  Charles P. Pace ,  Nigel Lee ,  Renato Pizzorni

IPC分类号： H04N7/26 ,  H04N19/50 ,  H04N19/543

CPC分类号： H04N19/50 ,  H04N19/23 ,  H04N19/51 ,  H04N19/543 ,  H04N19/85

摘要： A model-based compression codec applies higher-level modeling to produce better predictions than can be found through conventional block-based motion estimation and compensation. Computer-vision-based feature and object detection algorithms identify regions of interest throughout the video datacube. The detected features and objects are modeled with a compact set of parameters, and similar feature/object instances are associated across frames. Associated features/objects are formed into tracks and related to specific blocks of video data to be encoded. The tracking information is used to produce model-based predictions for those blocks of data, enabling more efficient navigation of the prediction search space than is typically achievable through conventional motion estimation methods. A hybrid framework enables modeling of data at multiple fidelities and selects the appropriate level of modeling for each portion of video data. A compliant-stream version of the model-based compression codec uses the modeling information indirectly to improve compression while producing bitstreams that can be interpreted by standard decoders.

公开(公告)号：US20170188049A1

公开(公告)日：2017-06-29

申请号：US15312659

申请日：2015-05-19

申请人： THOMSON LICENSING

发明人： Sebastien LASSERRE ,  Fabrice LE LEANNEC ,  Yannick OLIVIER ,  David TOUZE

IPC分类号： H04N19/60 ,  H04N19/182 ,  H04N19/23 ,  H04N19/184 ,  H04N19/172

CPC分类号： H04N19/60 ,  H04N19/172 ,  H04N19/182 ,  H04N19/184 ,  H04N19/23 ,  H04N19/33

摘要： The present disclosure generally relates to a method and device for encoding a frame. The method and the device comprises a processor configured for: —encoding (12) a backlight frame determined (11) from the frame; —obtaining (13) at least one component of a residual frame by dividing each component of the frame by a decoded version of the backlight frame; —mapping each component (YRes) of the residual frame (Res) such that the mapping of each pixel (YRes,P) of a component (YRes) of the residual frame Res depends on the pixel value (Balp) of either the backlight frame (Bal) or a decoded version of the backlight frame (Bal), associated with this pixel (p); and—encoding (18) the mapped residual frame. The disclosure further relates to a decoding method and device.