公开(公告)号：US11575934B2

公开(公告)日：2023-02-07

申请号：US17669235

申请日：2022-02-10

申请人： Microsoft Technology Licensing, LLC

发明人： Alexandros Tourapis ,  Shipeng Li ,  Feng Wu

IPC分类号： H04N19/577 ,  H04N19/87 ,  H04N19/52 ,  H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/51 ,  H04N19/102 ,  H04N19/61 ,  H04N19/593 ,  H04N19/137 ,  H04N19/142 ,  H04N19/573 ,  H04N19/56 ,  H04N19/58 ,  H04N19/107

摘要： Several improvements for use with Bidirectionally Predictive (B) pictures within a video sequence are provided. In certain improvements Direct Mode encoding and/or Motion Vector Prediction are enhanced using spatial prediction techniques. In other improvements Motion Vector prediction includes temporal distance and subblock information, for example, for more accurate prediction. Such improvements and other presented herein significantly improve the performance of any applicable video coding system/logic.

公开(公告)号：US20220417524A1

公开(公告)日：2022-12-29

申请号：US17822025

申请日：2022-08-24

申请人： Comcast Cable Communications, LLC

发明人： Alexander Giladi

IPC分类号： H04N19/142 ,  H04N19/159 ,  H04N19/172 ,  H04N19/179 ,  H04N19/517 ,  H04N19/87 ,  H04N19/577 ,  H04N19/105

摘要： Systems, methods, and apparatuses are described for compressing digital content. The digital content may comprise a plurality of frames. The plurality of frames may comprise a plurality of crossfade frames. A first boundary frame of the crossfade frames may be determined. A second boundary frame of the crossfade frames may be determined. At least a portion of the crossfade frames may be coded as inter-predicted frames using a weighting factor and based on the first boundary frame or the second boundary frame.

公开(公告)号：US20220408097A1

公开(公告)日：2022-12-22

申请号：US17764162

申请日：2019-11-14

申请人： Intel Corporation

发明人： Yunbiao Lin ,  Changliang Wang ,  Ximin Zhang ,  Fan He ,  Jill Boyce ,  Sri Ranjan SRIKANTAM

IPC分类号： H04N19/146 ,  H04N19/142 ,  H04N19/184 ,  H04N19/172

摘要： An example apparatus for adaptively encoding video frames includes a network analyzer to predict an instant bitrate based on channel throughput feedback received from a network. The apparatus also includes a content analyzer to generate ladder info based on a received frame. The apparatus further includes an adaptive decision executer to determine a frame rate, a video resolution, and a target frame size based on the predicted instant bitrate and the ladder outputs. The apparatus further includes an encoder to encode the frame based on the frame rate, the video resolution, and the target frame size.

公开(公告)号：US11523117B2

公开(公告)日：2022-12-06

申请号：US17207771

申请日：2021-03-22

申请人： Realtek Semiconductor Corp.

发明人： Weimin Zeng ,  Chi-Wang Chai ,  Wei Li ,  QingXi He ,  Wujun Chen ,  Rong Zhang

IPC分类号： H04N19/124 ,  H04N19/142 ,  H04N19/176 ,  H04N19/169 ,  H04N19/159

摘要： An encoder includes a frame level processing circuit, a coding tree unit (CTU) level processing circuit and an encoding circuit. The frame level processing circuit is arranged to calculate a bit number of a current frame according a target bitrate and a frame rate, and the frame level processing circuit is further arranged to calculate a quantization parameter of the current frame according to the bit number of the current frame and at least one parameter. The CTU level processing circuit is arranged to use an adaptive quantization mode to adjust the quantization parameter to generate an adjusted quantization parameter. The encoding circuit is arranged to encode the current frame to generate output data according to the adjusted quantization parameter.

公开(公告)号：US20220312021A1

公开(公告)日：2022-09-29

申请号：US17520121

申请日：2021-11-05

申请人： CheckVideo LLC

发明人： Lai-Tee Cheok ,  Nikhil Gagvani

IPC分类号： H04N19/167 ,  H04N7/18 ,  H04N19/176 ,  H04N19/172 ,  H04N19/149 ,  H04N19/115 ,  H04N19/61 ,  H04N19/107 ,  H04N19/114 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/137 ,  H04N19/142 ,  H04N19/152 ,  H04N19/177 ,  H04N19/17 ,  H04N19/146 ,  H04N19/70

摘要： A method and apparatus for encoding surveillance video where one or more regions of interest are identified and the encoding parameter values associated with those regions are specified in accordance with intermediate outputs of a video analytics process. Such an analytics-modulated video compression approach allows the coding process to adapt dynamically based on the content of the surveillance images. In this manner, the fidelity of the region of interest is increased relative to that of a background region such that the coding efficiency is improved, including instances when no target objects appear in the scene. Better compression results can be achieved by assigning different coding priority levels to different types of detected objects.

公开(公告)号：US20220191493A1

公开(公告)日：2022-06-16

申请号：US17557996

申请日：2021-12-21

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Athanasios Leontaris ,  Alexandros Tourapis

IPC分类号： H04N19/124 ,  H04N19/15 ,  H04N19/14 ,  H04N19/137 ,  H04N19/142 ,  H04N19/154 ,  H04N19/194 ,  H04N19/159 ,  H04N19/615 ,  H04N19/80

摘要： Embodiments feature families of rate allocation and rate control methods that utilize advanced processing of past and future frame/field picture statistics and are designed to operate with one or more coding passes. At least two method families include: a family of methods for a rate allocation with picture look-ahead; and a family of methods for average bit rate (ABR) control methods. At least two other methods for each method family are described. For the first family of methods, some methods may involve intra rate control. For the second family of methods, some methods may involve high complexity ABR control and/or low complexity ABR control. These and other embodiments can involve any of the following: spatial coding parameter adaptation, coding prediction, complexity processing, complexity estimation, complexity filtering, bit rate considerations, quality considerations, coding parameter allocation, and/or hierarchical prediction structures, among others.

公开(公告)号：US11356709B2

公开(公告)日：2022-06-07

申请号：US14963727

申请日：2015-12-09

申请人： ARRIS Enterprises LLC

发明人： Wayne D. Michelsen ,  Swaroop Chanda ,  Wei Zhou ,  Jane Perera

IPC分类号： H04N9/00 ,  H04N19/87 ,  H04N19/194 ,  H04N19/615 ,  H04N19/172 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/51

摘要： A method is provided to better detect a scene change to provide a prediction to an encoder to enable more efficient encoding. The method uses a Motion Compensated Temporal Filter (MCTF) that provides motion estimation and is located prior to an encoder. The MCTF provides a Motion Compensated Residual (MCR) used to detect the scene change transition. When a scene is relatively stable, the MCR score is also relatively stable. However, when a scene transition is in process, the MCR score behavior changes, Algorithmically, the MCR score is used by comparing the sliding mean of the MCR score to the sliding median. This comparison highlights the transition points. In the case of a scene cut, the MCR score exhibits a distinct spike. In the case of a fade or dissolve, the MCR score exhibits a transitional period of degradation followed by recovery. By implementing the above detection using the MCR, the location of the I-pictures in the downstream encoding process can be accurately determined for the encoder.

公开(公告)号：US11350069B2

公开(公告)日：2022-05-31

申请号：US16785291

申请日：2020-02-07

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Sung-bo Oh

IPC分类号： H04N9/64 ,  G09G5/00 ,  H04N5/44 ,  H04N21/4363 ,  H04N21/4402 ,  H04N21/81 ,  H04N21/845 ,  H04N19/46 ,  H04N5/57 ,  H04N19/87 ,  H04N19/142 ,  H04N7/015

摘要： A source and a sink device are provided. The sink device includes: an interface configured to receive, from a source device, a content, and image quality-related data regarding a next scene to be output after a scene output from the sink device from among a plurality of scenes forming the content; a storage configured to store the image quality-related data received from the source device; and a processor configured to perform an image quality improvement process with respect to the next scene to be output using the stored image quality-related data.

公开(公告)号：US20220167003A1

公开(公告)日：2022-05-26

申请号：US17668823

申请日：2022-02-10

申请人： Microsoft Technology Licensing, LLC

发明人： Bin Li ,  Jizheng Xu

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

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：US20220150515A1

公开(公告)日：2022-05-12

申请号：US17297120

申请日：2019-11-27

申请人： OP Solutions, LLC

发明人： Velibor Adzic ,  Hari Kalva ,  Borivoje Furht

IPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/117 ,  H04N19/142 ,  H04N19/176

摘要： A decoder includes circuitry configured to receive a bitstream, decode a plurality of video frames from the bitstream, determine for a current block of a current frame that a long term reference block update mode is enabled, determine a long term reference block update including pixel values and using the plurality of video frames, and update a portion of a long term reference frame with the long term reference block update. Related apparatus, systems, techniques and articles are also described.