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公开(公告)号：US20240364939A1
公开(公告)日：2024-10-31
申请号：US18685141
申请日：2022-08-25
发明人： Yue YU , Haoping YU
IPC分类号： H04N19/96 , H04N19/124 , H04N19/18 , H04N19/46
CPC分类号： H04N19/96 , H04N19/124 , H04N19/18 , H04N19/46
摘要： In some embodiments, a video decoder decodes a video from a bitstream of the video using a history-based rice parameter derivation. The video decoder accesses a binary string representing a partition of the video and processes each coding tree unit (CTU) in the partition to generate decoded coefficient values in the CTU. The process includes updating a replacement variable for a transform unit (TU) in the CTU for calculating rice parameters independently of the previous TU or CTU. The process further includes calculating the rice parameters for TU in the CTU based on the value of the replacement variable and decoding the binary string corresponding to the TU into coefficient values based on the calculated rice parameters. Pixel values of the TU can be determined from the decoded coefficient values for output.
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公开(公告)号：US20240364910A1
公开(公告)日：2024-10-31
申请号：US18753216
申请日：2024-06-25
发明人： Jonathan GAN , Yue YU , Haoping YU
IPC分类号： H04N19/46 , H04N19/124 , H04N19/184
CPC分类号： H04N19/46 , H04N19/124 , H04N19/184
摘要： A method for decoding a video includes that: a decoder decodes a video from a bitstream of the video; the decoder accesses a bitstream of the video and extracts a GCI flag from the bitstream; the decoder determines that one or more general constraints are imposed for the video based on the GCI flag value and extracts, from the bitstream of the video, a value indicating a quantity of additional bits included in the bitstream of the video, the additional bits include flag bits indicating respective additional coding tools to be constrained for the video; if the value is greater than five, the decoder extracts six flags from the bitstream of the video that indicate respective constraints for six additional coding tools; and the decoder decodes the bitstream of the video into images based on the constraints for the six additional coding tools indicated by the six flags.
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3.发明公开公开(公告)号：US20240357148A1
公开(公告)日：2024-10-24
申请号：US18760591
申请日：2024-07-01
发明人： Yago SÁNCHEZ DE LA FUENTE , Karsten SÜHRING , Cornelius HELLGE , Thomas SCHIERL , Robert SKUPIN , Thomas WIEGAND
IPC分类号： H04N19/46 , H04N19/423
CPC分类号： H04N19/46 , H04N19/423
摘要： An apparatus for receiving a video data stream as an input bitstream is provided. The video data stream has a video encoded thereinto, wherein, for a playback speed modification factor (Nx), the apparatus is to determine a decoding capability requirement depending on a decoding capability requirement limit, wherein the playback speed modification factor (Nx) is a forward playback speed modification factor or is a backward playback speed modification factor.
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公开(公告)号：US20240357126A1
公开(公告)日：2024-10-24
申请号：US18762618
申请日：2024-07-02
发明人： Fan WANG , Zhihuang XIE
IPC分类号： H04N19/139 , G06V10/74 , H04N19/119 , H04N19/176 , H04N19/46
CPC分类号： H04N19/139 , G06V10/761 , H04N19/119 , H04N19/176 , H04N19/46
摘要： A method for temporal motion information prediction is provided. The method includes the following. At least one non-adjacent position of a current block is determined. First temporal motion information of the current block is determined according to motion information of the at least one non-adjacent position in a coded picture. The coded picture is a reference picture of the current block, and the first temporal motion information of the current block is determined according to the motion information of the at least one non-adjacent position in the coded picture as follows. A collocated block corresponding to the non-adjacent position in the reference picture is determined. Motion information of the collocated block is obtained. The first temporal motion information of the current block is obtained by scaling a motion vector in the obtained motion information.
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公开(公告)号：US20240357120A1
公开(公告)日：2024-10-24
申请号：US18750541
申请日：2024-06-21
申请人： LG ELECTRONICS INC.
发明人： Seethal PALURI , Hendry HENDRY , Seunghwan KIM , Jie ZHAO
IPC分类号： H04N19/132 , H04N19/159 , H04N19/174 , H04N19/46 , H04N19/70
CPC分类号： H04N19/132 , H04N19/159 , H04N19/174 , H04N19/46 , H04N19/70
摘要： A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, at least one of a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header, or a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of at least one of the first flag or the second flag; and generating reconstructed samples on the basis of the prediction samples.
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公开(公告)号：US20240357117A1
公开(公告)日：2024-10-24
申请号：US18760826
申请日：2024-07-01
IPC分类号： H04N19/13 , H04N19/172 , H04N19/174 , H04N19/46 , H04N19/70
CPC分类号： H04N19/13 , H04N19/174 , H04N19/46 , H04N19/70 , H04N19/172
摘要： A length indicator associated with an encoded representation of a slice is parsed. The length indicator is indicative of a length of an extension field present in a slice header of the encoded representation. A decoder can then determine to ignore, during decoding of the encoded representation, any value of the extension field in the slice header where these values are identified based on the length indicator. As a consequence, an extension field can be added to slice headers and still enable legacy decoders to correctly decode the encoded representations.
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公开(公告)号：US12126832B2
公开(公告)日：2024-10-22
申请号：US18147082
申请日：2022-12-28
发明人： Guido Meardi
IPC分类号： H04N19/00 , H04N19/105 , H04N19/122 , H04N19/124 , H04N19/136 , H04N19/33 , H04N19/36 , H04N19/44 , H04N19/46 , H04N19/60 , H04N19/61 , H04N19/70 , H04N19/91 , H04N19/93
CPC分类号： H04N19/61 , H04N19/105 , H04N19/122 , H04N19/124 , H04N19/136 , H04N19/33 , H04N19/36 , H04N19/44 , H04N19/46 , H04N19/60 , H04N19/70 , H04N19/91 , H04N19/93
摘要： There is disclosed a method of encoding an input signal, the method comprising: receiving a base encoded signal, the base encoded signal being generated by feeding an encoder with a down-sampled version of an input signal; producing a first residual signal by: decoding the base encoded signal to produce a first decoded signal; and using a difference between the base decoded signal and the down-sampled version of the input signal to produce the first residual signal; producing a second residual signal by: correcting the base decoded signal using the residual signal to create a corrected decoded version; up-sampling the corrected decoded version; and using a difference between the up-sampled corrected decoded signal and the input signal to produce the second residual signal; wherein the up-sampling is one of bilinear or bicubic up-sampling. A corresponding decoding method is also disclosed.
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公开(公告)号：US12126831B2
公开(公告)日：2024-10-22
申请号：US17947047
申请日：2022-09-16
申请人： LG ELECTRONICS INC.
发明人： Moonmo Koo , Jaehyun Lim , Seunghwan Kim
IPC分类号： H04N11/02 , H04N19/119 , H04N19/124 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/18 , H04N19/46 , H04N19/61
CPC分类号： H04N19/61 , H04N19/119 , H04N19/124 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/18 , H04N19/46
摘要： An image decoding method according to the present document comprises the steps of: receiving a quantized transform coefficient for a target block and a transform index for non-separable quadratic transform; deriving transform coefficients by inversely quantizing the quantized transform coefficient; deriving corrected transform coefficients on the basis of a transform kernel matrix in a predetermined transform set indicated by the transform index; and deriving residual samples for the target block on the basis of inverse linear transform for the corrected transform coefficients, wherein when the target block is divided into a predetermined number of sub-blocks and is coded by intra prediction, the corrected transform coefficients are derived in units of the sub-blocks, and the transform index is received for the target block.
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公开(公告)号：US20240348814A1
公开(公告)日：2024-10-17
申请号：US18753068
申请日：2024-06-25
发明人： Chi WANG , Pongsak LASANG , Toshiyasu SUGIO , Tatsuya KOYAMA
IPC分类号： H04N19/46 , H04N19/597 , H04N19/96
CPC分类号： H04N19/46 , H04N19/597 , H04N19/96
摘要： A three-dimensional data encoding method includes: generating first information in which an N-ary tree structure of a plurality of three-dimensional points included in three-dimensional data is expressed using a first formula, where N is an integer of 2 or higher; and generating a bitstream including the first information. The first information includes pieces of three-dimensional point information each associated with a corresponding one of the plurality of three-dimensional points. The pieces of three-dimensional point information each include indexes each associated with a corresponding one of a plurality of levels in the N-ary tree structure. The indexes each indicate a subblock, among N subblocks belonging to a corresponding one of the plurality of levels, to which a corresponding one of the plurality of three-dimensional points belongs.
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公开(公告)号：US20240348807A1
公开(公告)日：2024-10-17
申请号：US18638119
申请日：2024-04-17
申请人： Electronics and Telecommunications Research Institute , IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
发明人： Kwan-Jung OH , Gwangsoon LEE , Euee-S. JANG , Jai-Young OH , Tian-Yu DONG , Xin LI
IPC分类号： H04N19/30 , H04N19/136 , H04N19/182 , H04N19/20 , H04N19/46
CPC分类号： H04N19/30 , H04N19/136 , H04N19/182 , H04N19/20 , H04N19/46
摘要： An image encoding method according to the present disclosure may include generating an atlas based on a plurality of viewpoint images; encoding the atlas; and encoding metadata for the atlas. In this case, the metadata may include first information showing whether a viewpoint image is a background image.
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