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公开(公告)号：US20240357079A1
公开(公告)日：2024-10-24
申请号：US18633182
申请日：2024-04-11
发明人： Jian-Liang Lin , Po-Han Lin , Vadim Seregin , Marta Karczewicz , Yao-Jen Chang , Zhi Zhang
IPC分类号： H04N19/105 , H04N19/174 , H04N19/176
CPC分类号： H04N19/105 , H04N19/174 , H04N19/176
摘要： A method of encoding or decoding video data includes selecting a group of blocks based on probing samples determined from pixels that are proximate to the blocks in the group of blocks and current probing samples determined from pixels that are proximate to a current block; fusing the blocks in the group of blocks to generate a prediction signal; and encoding or decoding the current block based on the prediction signal.
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公开(公告)号：US11924410B2
公开(公告)日：2024-03-05
申请号：US17662140
申请日：2022-05-05
发明人： Han Huang , Yao-Jen Chang , Vadim Seregin , Chun-Chi Chen , Marta Karczewicz
IPC分类号： H04N19/105 , H04N19/176 , H04N19/51 , H04N19/593 , H04N19/70
CPC分类号： H04N19/105 , H04N19/176 , H04N19/51 , H04N19/593 , H04N19/70
摘要： An example device for decoding video data includes one or more processors implemented in circuitry and configured to: generate an inter-prediction block for a current block of video data; generate an intra-prediction block for the current block of video data; generate a final prediction block for the current block of video data from the inter-prediction block and the intra-prediction block, including performing each of combined inter/intra prediction (CIIP) mode, overlapped block motion compensation (OBMC), and luma mapping with chroma scaling (LMCS) while generating the final prediction block; and decode the current block of video data using the final prediction block. To generate the final prediction block, the processors may perform LMCS on a first inter-prediction sub-block, combine the LMCS-mapped first inter-prediction sub-block with the intra-prediction block using CIIP, and perform OBMC between the first CIIP prediction block and a second inter-prediction sub-block.
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公开(公告)号：US20230283770A1
公开(公告)日：2023-09-07
申请号：US18175282
申请日：2023-02-27
发明人： Yao-Jen Chang , Vadim Seregin , Marta Karczewicz
IPC分类号： H04N19/105 , H04N19/52 , H04N19/139 , H04N19/176
CPC分类号： H04N19/105 , H04N19/52 , H04N19/139 , H04N19/176
摘要： A device for decoding video data can be configured to determine that a block is coded in an overlapped block motion compensation (OBMC) mode; determine a first prediction block for the block using a first motion vector for the block; determine a second prediction block for the block using a second motion vector, wherein the second motion is a motion vector of a neighboring block of the block; select an OBMC blending process from a plurality of available OBMC blending processes; blend the first prediction block and the second prediction block using the selected OBMC blending process to determine a blended block; and reconstruct the block using the blended block.
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公开(公告)号：US11632540B2
公开(公告)日：2023-04-18
申请号：US17119758
申请日：2020-12-11
IPC分类号： H04N19/105 , H04N19/132 , H04N19/30 , H04N19/70 , H04N19/176
摘要： A video encoder and video decoder may be configured to disable subpicture processing in situations where reference picture scaling is enabled. In another example, when reference picture scaling is enabled, a video encoder may determine a reference picture scaling ratio for the reference picture resampling process based on a width of a scaling window (PicOutputWidthL) of the current picture and a height of the scaling window (PicOutputHeightL) of the current picture. The values of PicOutputWidthL and PicOutputHeightL are constrained, respectively, relative to a width of a scaling window (refPicOutputWidthL) of the reference picture and a height of the scaling window (refPicOutputHeightL) of the reference picture.
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公开(公告)号：US20220210423A1
公开(公告)日：2022-06-30
申请号：US17456080
申请日：2021-11-22
发明人： Yao-Jen Chang , Marta Karczewicz
IPC分类号： H04N19/13 , H04N19/105 , H04N19/159 , H04N19/70 , H04N19/176
摘要： A video coder may code a block of video data using an intra prediction mode determined from a most probable mode list. The video coder may construct a general most probable mode list containing N entries, wherein the N entries of the general most probable mode list are intra prediction modes, and wherein a planar mode is an ordinal first entry in the general most probable mode list, construct a primary most probable mode list from a first Np entries in the general most probable mode list, where Np is less than N, and construct a secondary most probable mode list from a remaining (N-Np) entries in the general most probable mode list. The video coder may then determine a current intra prediction mode for a current block of video data using the primary most probable mode list or the secondary most probable mode list.
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公开(公告)号：US11356685B2
公开(公告)日：2022-06-07
申请号：US17027262
申请日：2020-09-21
IPC分类号： H04N19/44 , H04N19/70 , H04N19/132 , H04N19/423 , H04N19/186 , H04N19/176
摘要： A video decoder can be configured to decode a first syntax element indicating a size of a coding tree unit (CTU); after decoding the first syntax element indicating the size of the CTU, decode a second syntax element indicating a width of elements of a subpicture identifier grid; after decoding the first syntax element indicating the size of the CTU, decode a third syntax element indicating a height of the elements of the subpicture identifier grid; and determine a location of a subpicture within a picture based on the first syntax element, the second syntax element, and the third syntax element.
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公开(公告)号：US11350083B2
公开(公告)日：2022-05-31
申请号：US16847918
申请日：2020-04-14
发明人： Yao-Jen Chang , Chun-Chi Chen , Wei-Jung Chien , Marta Karczewicz
IPC分类号： H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/70
摘要： A method of encoding and decoding video data, including coding a first syntax element that specifies a value used to derive a maximum number of intra block copy merging candidates, deriving the maximum number of intra block copy merging candidates based on the value of the first sytnax element, and coding a first block of video data using intra block copy mode according to the maximum number of intra block copy merging candidates.
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公开(公告)号：US20210314624A1
公开(公告)日：2021-10-07
申请号：US17220418
申请日：2021-04-01
发明人： Muhammed Zeyd Coban , Vadim Seregin , Yong He , Yao-Jen Chang
IPC分类号： H04N19/70 , H04N19/105 , H04N19/169
摘要： An example method includes decoding, from a picture header syntax structure of a coded video bitstream, a syntax element indicating whether or not a picture associated with the picture header syntax structure may include multiple different types of Network Abstraction Layer (NAL) units; responsive to the syntax element indicating that the picture may include multiple different types of NAL units, decoding a merged subpicture track that includes the picture where each picture in the merged subpicture track refers to a common picture parameter set (PPS); and reconstructing, based on the common PPS, samples of the picture.
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公开(公告)号：US11109070B2
公开(公告)日：2021-08-31
申请号：US16948084
申请日：2020-09-02
发明人： Yao-Jen Chang , Vadim Seregin , Muhammed Zeyd Coban , Adarsh Krishnan Ramasubramonian , Marta Karczewicz
IPC分类号： H04N19/70 , H04N19/119 , H04N19/157 , H04N19/174 , H04N19/103
摘要： An example device includes a memory configured to store video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether a maximum number of merge candidates for a slice of the video data is equal to a first value. The one or more processors are configured to infer a value of a first syntax element to be equal to a second value based at least in part on the maximum number of merge candidates for the slice being equal to the first value, the first syntax element being indicative of a maximum number of merge candidates and a maximum number of merge candidates of a non-rectangular coding mode. The one or more processors are also configured to decode the slice based on the maximum number of merge candidates and the first syntax element.
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公开(公告)号：US20210195172A1
公开(公告)日：2021-06-24
申请号：US17119758
申请日：2020-12-11
IPC分类号： H04N19/105 , H04N19/132 , H04N19/30 , H04N19/70 , H04N19/176
摘要： A video encoder and video decoder may be configured to disable subpicture processing in situations where reference picture scaling is enabled. In another example, when reference picture scaling is enabled, a video encoder may determine a reference picture scaling ratio for the reference picture resampling process based on a width of a scaling window (PicOutputWidthL) of the current picture and a height of the scaling window (PicOutputHeightL) of the current picture. The values of PicOutputWidthL and PicOutputHeightL are constrained, respectively, relative to a width of a scaling window (refPicOutputWidthL) of the reference picture and a height of the scaling window (refPicOutputHeightL) of the reference picture.
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