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公开(公告)号：US11973970B2
公开(公告)日：2024-04-30
申请号：US18111023
申请日：2023-02-17
发明人： Sachin G. Deshpande
IPC分类号： H04N19/51 , H04N19/119 , H04N19/172
CPC分类号： H04N19/51 , H04N19/119 , H04N19/172
摘要： A method of encoding video data by an electronic device is provided. A plurality of picture parameters included in a picture header of a picture in the video data is signaled into a bitstream. A present flag included in a sub-picture header of a sub-picture generated by dividing the picture is signaled into the bitstream. The electronic device determines, based on the present flag, whether a specific one of a plurality of sub-picture parameters is determined based on the sub-picture header or the picture header. The specific one of the plurality of sub-picture parameters corresponds to the specific one of the plurality of picture parameters. The sub-picture is reconstructed based on the specific one of the plurality of sub-picture parameters when the specific one of the plurality of sub-picture parameters is determined from the sub-picture header.
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公开(公告)号：US11463736B2
公开(公告)日：2022-10-04
申请号：US17276621
申请日：2019-09-17
发明人： Sachin G. Deshpande
IPC分类号： H04N19/70 , H04N19/105 , H04N19/172 , H04N19/174
摘要： A method for determining a reference index for a reference picture list is disclosed. A reference picture list structure in one of a sequence parameter set and a slice header is decoded. A reference index for the reference picture list structure is derived according to a value of a reference picture list flag. A number of reference index active syntax in the slice header is decoded, if a number of entries in the reference picture list structure is greater than 1. The number of reference index active syntax is defined for i. A variable is derived by adding one to a value of the number of reference index active syntax. A value subtracted one from a value of the variable specifies a maximum reference index for the reference picture list.
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公开(公告)号：US12028541B2
公开(公告)日：2024-07-02
申请号：US18132032
申请日：2023-04-07
发明人： Sachin G. Deshpande , Eiichi Sasaki , Takeshi Chujoh , Yukinobu Yasugi , Tomohiro Ikai , Tomoko Aono
IPC分类号： H04N19/436 , H04N19/119 , H04N19/167 , H04N19/174 , H04N19/96
CPC分类号： H04N19/436 , H04N19/119 , H04N19/167 , H04N19/174 , H04N19/96
摘要： A moving image decoding method is provided for decoding encoded data of a tile group generated by splitting a picture into one or more rectangular regions. The tile group includes one or more segments. The moving image decoding method includes decoding a wavefront parallel processing (WPP) enabled flag indicating whether a rectangular tile or a coding tree unit (CTU) row having a height of one CTU exists in a segment in an object tile group; and decoding an end bit of the segment. When the WPP enabled flag is 1, after decoding a CTU at a right end of the CTU row, an end bit of a first segment having a first fixed value is decoded. When the WPP enabled flag is 0, after decoding a CTU at a bottom right of a tile, an end bit of a second segment having a second fixed value is decoded.
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4.发明授权公开(公告)号：US11849135B2
公开(公告)日：2023-12-19
申请号：US17962740
申请日：2022-10-10
IPC分类号： H04N7/12 , H04N19/46 , H04N19/176 , H04N19/184 , H04N19/64 , H04N19/127
CPC分类号： H04N19/46 , H04N19/127 , H04N19/176 , H04N19/184 , H04N19/647
摘要： A video device to determine picture count information for decoding video pictures is provided. The video device decodes a picture order count (POC) most significant bit (MSB) first flag that indicates whether a POC MSB second flag is present. When the POC MSB second flag is present, the video device decodes the POC MSB second flag indicating whether a POC MSB cycle element is present. When the POC MSB cycle element is present, the video device decodes the POC MSB cycle element that specifies a value of a POC MSB cycle. The value of the POC MSB cycle is used to compute a POC MSB value that is combined with a POC least significant bit (LSB) value to produce a POC value used for decoding a first video picture, and a length of the POC LSB value is based on a maximum POC LSB minus four value.
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公开(公告)号：US11240528B2
公开(公告)日：2022-02-01
申请号：US16965609
申请日：2019-01-24
发明人： Byeongdoo Choi , Kiran Mukesh Misra , Jie Zhao , Philip Cowan , Weijia Zhu , Sachin G. Deshpande , Frank Bossen , Christopher Andrew Segall
IPC分类号： H04N19/52 , H04N19/70 , H04N19/176
摘要： Systems and methods for performing motion vector prediction for video coding are disclosed. A motion vector predictor is determined based at least in part on motion information associated with a selected motion vector predictor origin and offset values corresponding to a selected sampling point. The sampling point is specified according to a set of direction and distance on a sampling map for the motion vector predictor origin.
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公开(公告)号：US11589069B2
公开(公告)日：2023-02-21
申请号：US17277062
申请日：2019-09-17
发明人： Sachin G. Deshpande
IPC分类号： H04N19/51 , H04N19/119 , H04N19/172
摘要： A method of signaling tile set parameters is disclosed. A value for a syntax element is signaled in a network abstraction layer (NAL) unit. The value for the syntax element indicates that a tile set layer syntax structure is included in the NAL unit. Values for one or more tile set parameters included in the tile set layer syntax structure are signaled.
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公开(公告)号：US11496761B2
公开(公告)日：2022-11-08
申请号：US17254398
申请日：2019-06-25
IPC分类号： H04N19/44 , H04N19/184 , H04N19/169 , H04N19/70
摘要： This disclosure relates to video coding and more particularly to techniques for signaling a picture type in coded video. According to an aspect of an invention, 4 bits NAL unit type information in a NAL unit header is decoded; and a NAL unit type indicating that a content of a NAL unit is trailing picture is determined.
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公开(公告)号：US11375184B2
公开(公告)日：2022-06-28
申请号：US17311381
申请日：2019-12-10
发明人： Sachin G. Deshpande
IPC分类号： H04N19/105 , H04N19/172 , H04N19/46 , H04N19/70
摘要： According to an aspect of an invention, a method for signaling reference pictures in video coding is disclosed. The method comprises: decoding a number of entries in a reference picture list syntax structure; decoding a number of reference index active minus one syntax in a slice header, if the number of entries is greater than one; and deriving an active variable by using the number of reference index active minus one syntax.
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公开(公告)号：US11997297B2
公开(公告)日：2024-05-28
申请号：US17436200
申请日：2020-02-28
发明人： Sachin G. Deshpande
IPC分类号： H04N19/44 , H04N19/105 , H04N19/176 , H04N19/70
CPC分类号： H04N19/44 , H04N19/105 , H04N19/176 , H04N19/70
摘要： A method of decoding video data is disclosed. The method comprising: receiving a picture parameter set; and parsing from the picture parameter set a first syntax element specifying a difference between a first index of a tile located in a first tile group and a second index of a tile located in a second tile group.
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公开(公告)号：US11689724B2
公开(公告)日：2023-06-27
申请号：US17289957
申请日：2019-10-29
发明人： Sachin G. Deshpande
IPC分类号： H04N19/132 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/70
CPC分类号： H04N19/132 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/70
摘要： A method of deriving prediction sample values for decoding video data by a device is provided. A reference wraparound offset syntax specifying an offset used for computing a horizontal wrap-around position is decoded. A luma location is derived based on a product of a value of the reference wraparound offset syntax and a minimum coding block size. A predicted luma sample value is derived by using the luma location.
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