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1.发明公开
公开(公告)号：EP3794826A1
公开(公告)日：2021-03-24
申请号：EP19829878.8
申请日：2019-06-20
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/523 , H04N19/557 , H04N19/533 , H04N19/56
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公开(公告)号：EP3915262A1
公开(公告)日：2021-12-01
申请号：EP20770156.6
申请日：2020-02-28
发明人： SETHURAMAN, Sriram , KOTECHA, Sagar , A, Jeeva Raj
IPC分类号： H04N19/513
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公开(公告)号：EP4376410A3
公开(公告)日：2024-07-03
申请号：EP24167135.3
申请日：2020-03-19
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/577
CPC分类号： H04N19/577 , H04N19/521
摘要： In some embodiments, a video encoder or a video decoder obtains a pair of motion vectors for a current coding block of a video signal with respect to two reference frames. Predictions of the current block are generated using the pair of motion vectors from respective reference frames. The video encoder or video decoder further determine an optical flow for the current coding block based on samples values in the predictions. One component of the optical flow is determined based on the other component of the optical flow. Bi-predictive optical flow (BPOF) can be performed on the current coding block using the determined optical flow.
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公开(公告)号：EP4022931A1
公开(公告)日：2022-07-06
申请号：EP20870065.8
申请日：2020-09-21
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公开(公告)号：EP3963881A1
公开(公告)日：2022-03-09
申请号：EP20826064.6
申请日：2020-06-20
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/00
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公开(公告)号：EP3922023A1
公开(公告)日：2021-12-15
申请号：EP20766253.7
申请日：2020-03-04
发明人： SETHURAMAN, Sriram , KOTECHA, Sagar , A, Jeeva Raj
IPC分类号： H04N19/50 , H04N19/513 , H04N19/567
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8.发明公开
公开(公告)号：EP3847807A1
公开(公告)日：2021-07-14
申请号：EP19860067.8
申请日：2019-09-12
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/119
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9.发明公开
公开(公告)号：EP4415364A3
公开(公告)日：2024-10-23
申请号：EP24178165.7
申请日：2019-09-12
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/52 , H04N19/577 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/70 , H04N19/537
摘要： A method for inter-prediction of a current image block in a current picture of a video is provided. The method includes: when a flag is signaled at a sequence parameter set level and/or a picture level indicating whether a bi-directional optical flow (BIO or BDOF) procedure is enabled at the sequence parameter set level and/or the picture level, determining a value of the flag which is signaled at the sequence parameter set level and/or the picture level; determining whether a first temporal distance is equal to a second temporal distance; and performing the bi-directional optical flow (BIO or BDOF) procedure for the current image block, when a plurality of conditions are satisfied, wherein one of the plurality of conditions comprises: the value of the flag which is signaled at the sequence parameter set level and/or the picture level, indicating the BIO or BDOF procedure is enabled at the sequence parameter set level and/or the picture level; and the first temporal distance is equal to the second temporal distance; and performing no bi-directional optical flow (BIO or BDOF) procedure for the current image block, when the first temporal distance is not equal to the second temporal distance. Thus, the BIO or BDOF procedure is restricted to only the image block with equal-distance references.
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10.发明公开
公开(公告)号：EP4415364A2
公开(公告)日：2024-08-14
申请号：EP24178165.7
申请日：2019-09-12
发明人： SETHURAMAN, Sriram , A, Jeeva Raj , KOTECHA, Sagar
IPC分类号： H04N19/70
CPC分类号： H04N19/52 , H04N19/577 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/70
摘要： A method for inter-prediction of a current image block in a current picture of a video is provided. The method includes: when a flag is signaled at a sequence parameter set level and/or a picture level indicating whether a bi-directional optical flow (BIO or BDOF) procedure is enabled at the sequence parameter set level and/or the picture level, determining a value of the flag which is signaled at the sequence parameter set level and/or the picture level; determining whether a first temporal distance is equal to a second temporal distance; and performing the bi-directional optical flow (BIO or BDOF) procedure for the current image block, when a plurality of conditions are satisfied, wherein one of the plurality of conditions comprises: the value of the flag which is signaled at the sequence parameter set level and/or the picture level, indicating the BIO or BDOF procedure is enabled at the sequence parameter set level and/or the picture level; and the first temporal distance is equal to the second temporal distance; and performing no bi-directional optical flow (BIO or BDOF) procedure for the current image block, when the first temporal distance is not equal to the second temporal distance. Thus, the BIO or BDOF procedure is restricted to only the image block with equal-distance references.
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