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1. 发明授权

US11641486B2 Reducing latency in video encoding and decoding 有权
公开(公告)号：US11641486B2
公开(公告)日：2023-05-02
申请号：US17948982
申请日：2022-09-20
申请人： Microsoft Technology Licensing, LLC
发明人： Gary J. Sullivan
IPC分类号： H04N19/70 , H04N19/172 , H04N19/46 , H04N19/103 , H04N19/31 , H04N19/44 , H04N19/88 , H04N19/15 , H04N19/184
摘要： Techniques and tools for reducing latency in video encoding and decoding by constraining latency due to reordering of video frames, and by indicating the constraint on frame reordering latency with one or more syntax elements that accompany encoded data for the video frames. For example, a real-time communication tool with a video encoder sets a syntax element that indicates a constraint on frame reordering latency, which is consistent with inter-frame dependencies between multiple frames of a video sequence, then outputs the syntax element. A corresponding real-time communication tool with a video decoder receives the syntax element that indicates the constraint on frame reordering latency, determines the constraint on frame reordering latency based on the syntax element, and uses the constraint on frame reordering latency to determine when a reconstructed frame is ready for output (in terms of output order).

2. 发明授权

US11641472B2 Method for signaling of reference picture resampling with resampling picture size indication in video bitstream 有权
公开(公告)号：US11641472B2
公开(公告)日：2023-05-02
申请号：US17697402
申请日：2022-03-17
申请人： TENCENT AMERICA LLC
发明人： Byeongdoo Choi , Stephan Wenger , Shan Liu
IPC分类号： H04N19/132 , H04N19/196 , H04N19/172 , H04N19/184 , H04N19/146
摘要： A method, device, and computer-readable medium for decoding an encoded video bitstream using at least one processor, including obtaining a flag indicating that a conformance window is not used for reference picture resampling; based on the flag indicating that the conformance window is not used for the reference picture resampling, determining whether a resampling picture size is signaled; based on determining that the resampling picture size is signaled, determining a resampling ratio based on the resampling picture size; based on determining that the resampling picture size is not signaled, determining the resampling ratio based on an output picture size; and performing the reference picture resampling on a current picture using the resampling ratio.

3. 发明申请

US20230128378A1 Method and Apparatus for Imposing Bitstream Constraints in Video Coding 有权
公开(公告)号：US20230128378A1
公开(公告)日：2023-04-27
申请号：US17997039
申请日：2021-04-26
申请人： HFI Innovation Inc.
发明人： Shih-Ta HSIANG
IPC分类号： H04N19/70 , H04N19/172 , H04N19/30
摘要： A method and apparatus for signaling or parsing general constraint information are disclosed. According to the method for the decoder side, a video bitstream comprising a current picture is received. A first syntax of general constraint information related to one or more explicit scaling list constraints is parsed from the video bitstream, where when a value of the first syntax indicates constraint of no_explicit_scaling_list being imposed, a second syntax has a mandatory value to indicate that use of an explicit scaling list in an SPS (sequence parameter set) level is disabled. The value of the second syntax indicates that the use of the explicit scaling list is enabled or not in the SPS level. The explicit scaling list is derived from the video bitstream when the second syntax has a value other than the mandatory value. The current picture is decoded utilizing information comprising the explicit scaling list.

4. 发明授权

US11638025B2 Multi-scale optical flow for learned video compression 有权
公开(公告)号：US11638025B2
公开(公告)日：2023-04-25
申请号：US17207244
申请日：2021-03-19
申请人： QUALCOMM Incorporated
发明人： Reza Pourreza , Amir Said , Yang Yang , Yinhao Zhu , Taco Sebastiaan Cohen
IPC分类号： H04N19/51 , H04N19/172 , H04N19/137 , H04N19/107 , H04N19/593 , G06N3/08
摘要： Systems and techniques are described for encoding and/or decoding data based on motion estimation that applies variable-scale warping. An encoding device can receive an input frame and a reference frame that depict a scene at different times. The encoding device can generate an optical flow identifying movements in the scene between the two frames. The encoding device can generate a weight map identifying how finely or coarsely the reference frame can be warped for input frame prediction. The encoding device can generate encoded video data based on the optical flow and the weight map. A decoding device can generate a reconstructed optical flow and a reconstructed weight map from the encoded data. A decoding device can generate a prediction frame by warping the reference frame based on the reconstructed optical flow and the reconstructed weight map. The decoding device can generate a reconstructed input frame based on the prediction frame.

5. 发明申请

US20230121486A1 VIDEO CODING AND DECODING 有权
公开(公告)号：US20230121486A1
公开(公告)日：2023-04-20
申请号：US17914096
申请日：2021-03-22
申请人： CANON KABUSHIKI KAISHA
发明人： Naël OUEDRAOGO , Patrice ONNO , Guillaume LAROCHE
IPC分类号： H04N19/70 , H04N19/426 , H04N19/169 , H04N19/172
摘要： A sequence of images is encoded in a bitstream as a series of picture units PU-01˜03. Each picture unit corresponds to one encoded image and includes one or more network abstraction layer (NAL) units NAL-01˜23. The NAL units may be video coding layer (VCL) NAL units which each contain encoded image data or adaptation parameter set NAL units which each contain an adaptation parameter set (APS) having parameters for performing one or more types of processing operation on the image data contained in one or more VCL NAL units. The APS NAL units may be prefix APS NAL units P-APS or suffix APS NAL units S-APS. An additional constraint is applied to the bitstream prohibiting inclusion, in a picture unit, of a prefix APS NAL unit after the first NAL unit of the picture unit concerned. This can avoid more than one APS applying to slices belonging to the same picture unit, and hence reduce the size of an APS buffer. Alternatively, or in addition, it is permitted to include, in the same picture unit, of a prefix APS NAL unit and a suffix APS NAL unit having the same APS type and the same APS identifier but different contents. This can reduce rewriting operations when performing random access decoding at a specific timing in the coded video sequence.

6. 发明申请

US20230118907A1 THREE-DIMENSIONAL DATA ENCODING METHOD, THREE-DIMENSIONAL DATA DECODING METHOD, THREE-DIMENSIONAL DATA ENCODING DEVICE, AND THREE-DIMENSIONAL DATA DECODING DEVICE 有权
公开(公告)号：US20230118907A1
公开(公告)日：2023-04-20
申请号：US18082707
申请日：2022-12-16
申请人： Panasonic Intellectual Property Corporation of America
发明人： Noritaka IGUCHI , Toshiyasu SUGIO
IPC分类号： H04N19/70 , H04N19/172 , H04N19/119 , H04N19/174 , H04N19/14 , H04N19/597
摘要： A three-dimensional data encoding method includes: generating frame data items by encoding point cloud data items of frames; and generating a bitstream including the frame data items. Each of the frame data items includes processing unit data items corresponding to processing units obtained by dividing one frame. Each of the processing unit data items includes a frame identifier indicating a frame to which the processing unit data item belongs and a processing unit identifier indicating a processing unit corresponding to the processing unit data item. Values of the frame identifiers corresponding to the frame data items placed in the bitstream are set in a predetermined order, and values of the processing unit identifiers corresponding to the processing unit data items placed in the frame data item are set in an arbitrary order.

7. 发明授权

US11632549B2 Adaptive quantization of weighted matrix coefficients 有权
公开(公告)号：US11632549B2
公开(公告)日：2023-04-18
申请号：US17307530
申请日：2021-05-04
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Panji Setiawan , Eyal Shlomot
IPC分类号： H04N19/124 , H04N19/94 , G10L19/008 , H04N19/119 , H04N19/157 , H04N19/172 , G10L19/038 , G10L19/22
摘要： A method for encoding an input signal comprising signal frames into quantized bits is disclosed, the method comprises generating, for each frame of the input signal, a signal matrix comprising matrix coefficients obtained from that frame, grouping the matrix coefficients of each signal matrix into a plurality of partition vectors, and for each partition vector, selecting one vector quantization scheme from among a plurality of vector quantization schemes and quantizing that partition vector according to the selected vector quantization scheme to obtain the quantized bits. In an adaptive mode, the method comprises grouping differently the matrix coefficients obtained from different frames, and/or selecting different vector quantization schemes for partition vectors obtained from different frames.

8. 发明申请

US20230115248A1 LOSSY COMPRESSION OF VIDEO CONTENT INTO A GRAPH REPRESENTATION 有权
公开(公告)号：US20230115248A1
公开(公告)日：2023-04-13
申请号：US17937220
申请日：2022-09-30
申请人： Robert Bosch GmbH
发明人： Dotan Di Castro , Eitan Kosman
IPC分类号： H04N19/90 , H04N19/186 , H04N19/172
摘要： A method for lossily compressing a sequence of video frames into a representation, wherein each video frame comprises pixels that carry color values. The method includes: segmenting each video frame into superpixels, wherein these superpixels are groups of pixels that share at least one predetermined common property; assigning, to each superpixel in each video frame, at least one attribute derived from the pixels belonging to the respective superpixel; and combining superpixels as nodes in a graph representation, wherein superpixels in a same video frame are connected by spatial edges associated with at least one quantity that is a measure for a distance between these superpixels; and in response to superpixels in adjacent video frames in the sequence meeting at least one predetermined relatedness criterion, these superpixels are connected by temporal edges.

9. 发明申请

US20230113199A1 END OF SEQUENCE INDICATION IN CODED VIDEO 有权
公开(公告)号：US20230113199A1
公开(公告)日：2023-04-13
申请号：US18079303
申请日：2022-12-12
申请人： Bytedance Inc.
发明人： Ye-kui Wang
IPC分类号： H04N19/30 , H04N19/169 , H04N19/136 , H04N19/172
摘要： Methods, systems and devices for using end of sequence indications are described. An example method of video processing includes performing a conversion between a video and a bitstream of the video, wherein the bitstream includes multiple layers in multiple access units, AUs, including one or more pictures according to a format rule, wherein the format rule specifies that, responsive to an end of sequence (EOS) network abstraction layer (NAL) unit for a first layer being present in a first access unit (AU) in the bitstream, a subsequent picture of each of one or more higher layers of the first layer in an AU following the first AU in the bitstream is a coded layer video sequence start (CLVSS) picture.

10. 发明申请

US20230110989A1 VIDEO SIGNAL PROCESSING METHOD AND DEVICE THEREFOR 有权
公开(公告)号：US20230110989A1
公开(公告)日：2023-04-13
申请号：US18065919
申请日：2022-12-14
申请人： WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.
发明人： Dongcheol KIM , Jaehong JUNG , Geonjung KO , Juhyung SON , Jinsam KWAK
IPC分类号： H04N19/70 , H04N19/172 , H04N19/82
摘要： A video signal decoding device comprises a processor, wherein: the processor decodes a sequence parameter set (SPS) raw byte sequence payload (RBSP) syntax included in a bitstream of a video signal, and decodes the bitstream on the basis of the decoding result of the SPS RBSP syntax; the SPS RBSP syntax includes a first syntax element related to the number of one or more sub-pictures configuring one picture, and a second syntax element indicating whether to process a boundary of the one or more sub-pictures as a boundary of the one picture on the basis of the first syntax element; and the second syntax element is parsed only when the number of the one or more sub-pictures is two or more.

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