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公开(公告)号：US12155848B2
公开(公告)日：2024-11-26
申请号：US17503164
申请日：2021-09-17
Inventor： Xinwei Gao , Xunan Mao
IPC: H04N19/30 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
Abstract: This application discloses a video decoding method, a video encoding method, and related apparatuses. The method includes: determining a current video frame; obtaining, from video frames that have been decoded, a first quantity and a second quantity in a target reference frame associated with the current video frame; the first quantity being a quantity of intra-frame decoded blocks in the target reference frame, and the second quantity being a quantity of inter-frame decoded blocks in the target reference frame; determining, according to a relationship between the first quantity and the second quantity, a target resolution used for decoding the current video frame; and decoding the current video frame by using the target resolution. In this application, the technical problem of the relatively low video encoding and decoding efficiency caused by complex processing operations in the related art is resolved.
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公开(公告)号：US11849127B2
公开(公告)日：2023-12-19
申请号：US17478751
申请日：2021-09-17
Inventor： Xinwei Gao , Xunan Mao
IPC: H04N19/30 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/136 , H04N19/172 , H04N19/176
CPC classification number: H04N19/30 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/136 , H04N19/172 , H04N19/176
Abstract: A video decoding method, a video encoding method, and related apparatuses. The video decoding method includes: determining a current video frame; obtaining, from video frames that have been decoded, a first quantity of blocks of a first size and a second quantity of blocks of a second size in a reference frame associated with the current video frame, the first size being less than the second size; determining, according to a relationship between the first quantity and the second quantity, a target resolution used for decoding the current video frame; and decoding the current video frame by using the target resolution. In this application, the technical problem of the relatively low video encoding and decoding efficiency caused by complex processing operations in the related art is resolved.
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公开(公告)号：US11838503B2
公开(公告)日：2023-12-05
申请号：US17449109
申请日：2021-09-28
Inventor： Xinwei Gao , Weiran Li , Xunan Mao , Chenchen Gu
IPC: H04N19/119 , H04N19/117 , H04N19/14 , H04N19/176
CPC classification number: H04N19/119 , H04N19/117 , H04N19/14 , H04N19/176
Abstract: A video processing method is provided. In the method, at least one pair of decoded blocks to be reconstructed in a video frame is determined. Each pair of decoded blocks in the at least one pair of decoded blocks includes a first decoded block of a first resolution and a second decoded block of a second resolution. The first decoded block is adjacent to the second decoded block. The first resolution of the first decoded block is adjusted to a target resolution. The second resolution of the second decoded block is adjusted to the target resolution. A first edge pixel set in the first decoded block is determined. A second edge pixel set in the second decoded block is determined, the second edge pixel set being adjacent to the first edge pixel set. Further, the first edge pixel set and the second edge pixel set are filtered.
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公开(公告)号：US11451787B2
公开(公告)日：2022-09-20
申请号：US16996850
申请日：2020-08-18
Inventor： Xinwei Gao , Xunan Mao , Chenchen Gu
IPC: H04N19/146 , H04N19/124 , H04N19/132 , H04N19/172 , H04N19/42
Abstract: A video coding method is provided. The method includes obtaining an input video frame, obtaining a sampling parameter corresponding to the input video frame, determining downsampling information according to the sampling parameter, and encoding the input video frame according to the downsampling information to obtain encoded data corresponding to the input video frame, where determining the downsampling information includes: in response to determining the input video frame includes a B-frame, selecting a first downsampling proportion for the B-frame; and in response to determining the input video frame includes a P-frame, selecting a second downsampling proportion for the P-frame, the second downsampling proportion is lower than the first downsampling proportion, and the first and the second downsampling proportions are part of the downsampling information.
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公开(公告)号：US11412229B2
公开(公告)日：2022-08-09
申请号：US16994183
申请日：2020-08-14
Inventor： Xinwei Gao , Xunan Mao , Chenchen Gu
IPC: H04N19/147 , H04N19/124 , H04N19/172 , H04N19/176
Abstract: A video coding method includes obtaining an input video frame; determining down-sampling information corresponding to the input video frame in response to determining that a target processing manner corresponding to the input video frame is a down-sampling processing manner; encoding the input video frame according to the down-sampling information to obtain encoded data corresponding to the input video frame; and adding the down-sampling information to the encoded data according to a processing range corresponding to the down-sampling information. The down-sampling information is capable of identifying at least one of a down-sampling proportion and a down-sampling method for the input video frame or identifying a rule for identifying the at least one of a down-sampling proportion and a down-sampling method.
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Patent Agency Ranking
公开(公告)号：US11388403B2
公开(公告)日：2022-07-12
申请号：US16996443
申请日：2020-08-18
Inventor： Xunan Mao , Licai Guo , Yongfang Shi , Anlin Gao , Xinwei Gao , Tao Zhang , Haibo Deng , Chenchen Gu , Jing Lv
IPC: H04N19/124 , H04N19/132 , H04N19/172
Abstract: In a video encoding method, a to-be-encoded video is obtained. The video includes at least two video frames arranged in sequence. A quantization parameter and a quantization parameter threshold of an ith video frame is calculated, where i is a positive integer greater than or equal to 2. A coding resolution of the ith video frame is determined according to the quantization parameter and the quantization parameter threshold. The coding resolution is a first coding resolution in a case that the ith video frame is sampled, and the coding resolution is a second coding resolution in a case that the ith video frame is downsampled. Then the ith video frame is encoded at the coding resolution.
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公开(公告)号：US20220030245A1
公开(公告)日：2022-01-27
申请号：US17493688
申请日：2021-10-04
Inventor： Yaoyao GUO , Xunan Mao , Chenchen Gu
IPC: H04N19/146 , H04N19/137 , H04N19/14 , H04N19/159 , H04N19/172
Abstract: A video encoding code rate control method of a terminal device is provided. A space domain complexity and a time domain complexity of a first picture frame in a video stream are obtained. A first target bit of the first picture frame is updated to a second target bit according to the space domain complexity and the time domain complexity. A first initial quantization parameter of the first picture frame is updated to a second initial quantization parameter according to the space domain complexity and the time domain complexity. A compressed code stream of the first picture frame is generated according to the second target bit and the second initial quantization parameter.
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公开(公告)号：US10455229B2
公开(公告)日：2019-10-22
申请号：US15684940
申请日：2017-08-24
Inventor： Xunan Mao
IPC: H04N19/11 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/147 , H04N19/194
Abstract: Provided are a prediction mode selection method, apparatus and system related to the field of video coding. The method includes: selecting, for the current prediction unit, a first group of candidate intra-frame chromaticity prediction modes from N intra-frame prediction modes, performing a prediction residual cost calculation on each candidate intra-frame chromaticity prediction mode in the first group to obtain a difference evaluation value, selecting a second group of candidate intra-frame chromaticity prediction modes from the first group of candidate intra-frame chromaticity prediction modes according to the difference evaluation values, performing a coding cost calculation on each candidate intra-frame chromaticity prediction mode in the second group to obtain a coding cost value; and determining, according to the coding cost values, one of the candidate intra-frame chromaticity prediction modes in the second group that has a lowest coding cost, as an intra-frame chromaticity prediction mode of the current prediction unit.
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公开(公告)号：US11363263B2
公开(公告)日：2022-06-14
申请号：US16400334
申请日：2019-05-01
Inventor： Xunan Mao , Yaoyao Guo , Chenchen Gu , Xinwei Gao , Licai Guo , Yongfang Shi , Anlin Gao , Haibo Deng , Jing Lv
IPC: H04N19/115 , H04N19/15 , H04N19/177 , H04N19/146 , H04N19/114 , H04N19/172
Abstract: A data coding method includes determining a length of a current first bit-rate-control-unit data frame in to-be-transmitted data, and the length of the first bit-rate-control-unit data frame is less than or equal to a length of a group of pictures (GOP) data frame. The method also includes determining a first target bit rate of the first bit-rate-control-unit data frame according to the length of the first bit-rate-control-unit data frame, a target bit rate of the to-be-transmitted data, and a frame rate of the to-be-transmitted data and, when a first difference value between a real bit rate of a second bit-rate-control-unit data frame and a second target bit rate of the second bit-rate-control-unit data frame is greater than zero, adjusting the first target bit rate according to the first difference value, and coding the first bit-rate-control-unit data frame according to the adjusted first target bit rate.
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公开(公告)号：US11240511B2
公开(公告)日：2022-02-01
申请号：US16884330
申请日：2020-05-27
Inventor： Yaoyao Guo , Xunan Mao , Chenchen Gu
IPC: H04N19/146 , H04N19/137 , H04N19/14 , H04N19/172 , H04N19/159
Abstract: A video encoding code rate control method of a terminal device is provided. A space domain complexity and a time domain complexity of a first picture frame in a video stream are obtained. A first target bit of the first picture frame is updated to a second target bit according to the space domain complexity and the time domain complexity. A first initial quantization parameter of the first picture frame is updated to a second initial quantization parameter according to the space domain complexity and the time domain complexity. A compressed code stream of the first picture frame is generated according to the second target bit and the second initial quantization parameter.
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