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公开(公告)号：US12126804B2
公开(公告)日：2024-10-22
申请号：US17698549
申请日：2022-03-18
IPC分类号： H04N19/124 , H04N19/13 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/46 , H04N19/503 , H04N19/593
CPC分类号： H04N19/124 , H04N19/13 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/46 , H04N19/503 , H04N19/593
摘要： Decoder for decoding a residual signal from a data stream, configured to decode, from the data stream, a quantized prediction residual and at least one quantization error compensation signal; scale the quantized prediction residual to determine a scaled prediction residual; determine a reconstructed prediction residual based on the scaled prediction residual and the at least one quantization error compensation signal.
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公开(公告)号：US12075091B2
公开(公告)日：2024-08-27
申请号：US17962391
申请日：2022-10-07
发明人： Jonathan Pfaff , Philipp Helle , Michael Schaefer , Roman Rischke , Tobias Hinz , Philipp Merkle , Bjoern Stallenberger , Martin Winken , Mischa Siekmann , Heiko Schwarz , Detlev Marpe , Thomas Wiegand
IPC分类号： H04N19/61 , H04N19/176 , H04N19/184 , H04N19/44
CPC分类号： H04N19/61 , H04N19/176 , H04N19/184 , H04N19/44
摘要： Techniques for encoding/decoding of video signals are described, e.g. implemented in decoders, encoder, methods and non-transitory storage units storing instructions to perform the methods.
A decoder or encoder may be configured to predict a predetermined block of the picture using a plurality of neighbouring samples by reducing the plurality of neighbouring samples to obtain a reduced set of samples values lower, in number of samples, than compared to the plurality of neighbouring samples, subjecting the reduced set of sample values to a linear or affine linear transformation to obtain predicted values for predetermined samples of the predetermined block.-
公开(公告)号：US11825091B2
公开(公告)日：2023-11-21
申请号：US18104424
申请日：2023-02-01
发明人： Paul Haase , Christian Rudat , Heiner Kirchhoffer , Phan Hoang Tung Nguyen , Mischa Siekmann , Heiko Schwarz , Detlev Marpe , Thomas Wiegand
IPC分类号： H04N19/124 , H04N19/129 , H04N19/13 , H04N19/157 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/60 , H04N19/172
CPC分类号： H04N19/124 , H04N19/129 , H04N19/13 , H04N19/157 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/60
摘要： A video encoder is configured to entropy encode an absolute value of a quantization level of a current transform coefficient at position (xC, yC), wherein the absolute value is encoded using context adaptive binary arithmetic encoding of bins of a first binarization. The video coder is further configured, for the current transform coefficient, to encode a bin of the first binarization by using a context which is determined based on a sum of minimum absolute values of transform coefficient quantization levels, based on encoded bins of the first binarization, at one or more transform coefficient positions among (xC+1, yC), (xC+2, yC), (xC+1, yC+1), (xC, yC+1), and (xC, yC+2).
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4.发明授权公开(公告)号：US11706413B2
公开(公告)日：2023-07-18
申请号：US17362869
申请日：2021-06-29
发明人： Benjamin Bross , Phan Hoang Tung Nguyen , Paul Keydel , Heiko Schwarz , Detlev Marpe , Thomas Wiegand , Christian Helmrich
IPC分类号： H04N19/12 , H04N19/129 , H04N19/132 , H04N19/176 , H04N19/46
CPC分类号： H04N19/12 , H04N19/129 , H04N19/132 , H04N19/176 , H04N19/46
摘要： A picture in a data stream is subdivided into different size transform blocks. For a transform block, a transformation is selected by checking whether the block's size exceeds a threshold. If it does, a default technique is used to select the transformation. If it does not, a transformation is used from a list of transformations as identified by an index, the list including an identity transformation and non-identity transformations. A coefficients block in the data stream is decoded, and if the selected transformation is the identity transformation, then the coefficients block is used as a residual sample array, and if the selected transformation is not the identity transformation, the coefficients block is subjected to an inverse transformation corresponding to the selected transformation to obtain a residual sample array used to correct a prediction for the transform block.
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公开(公告)号：US20230025784A1
公开(公告)日：2023-01-26
申请号：US17959276
申请日：2022-10-03
IPC分类号： H04N19/119 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46 , H04N19/70
摘要： Block-based coding of a picture is done by providing an intra-prediction coding concept according to which a certain block of the picture is intra-prediction coded using a certain intra-coding mode by partitioning the predetermined block into partitions which are, for reconstruction purposes, sequentially subject to spatial prediction using the intra-prediction coding mode signaled for the certain block followed by correcting the thus obtained predictor using a prediction residual so that for preceding partitions a reconstruction of the samples is available to the decoder at the time of processing the next, then current, partition.
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公开(公告)号：US11363268B2
公开(公告)日：2022-06-14
申请号：US16825533
申请日：2020-03-20
发明人： Christian Helmrich , Thomas Wiegand , Adam Wieckowski , Heiko Schwarz , Detlev Marpe , Sebastian Bosse , Benjamin Bross
IPC分类号： H04N19/124 , H04N19/176
摘要： Coding quantization parameter variation or adaptation is made more effective by basing the determination of a coding quantization parameter for a predetermined block of the picture on a dispersion of a statistical sample value distribution of a high-pass filtered version of the predetermined block. The usage of the high-pass filtered version of the predetermined block as a basis for the determination of the dispersion instead of using, for instance, the un-filtered or original version of the predetermined block assists in a better adaptation of the resulting coding quantization parameter variation across the picture to the human visual system. Alternatively or additionally, coding quantization parameter variation or adaptation across a picture is made more efficient by a control of coding quantization parameter variation/adaptation across a picture in a manner dependent on a prediction of the actual dispersion. In order to improve the coding efficiency in encoding a picture into a data stream, a comparison between a first coding quantization parameter assigned to a predetermined block of the picture and a threshold which depends on a mean difference of sample values of the predetermined block to sample values' mean value may be performed.
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公开(公告)号：US11297338B2
公开(公告)日：2022-04-05
申请号：US17001023
申请日：2020-08-24
发明人： Christian Helmrich , Heiko Schwarz , Detlev Marpe , Thomas Wiegand , Adam Wieckowski , Mischa Siekmann , Benjamin Bross
IPC分类号： H04N19/31 , H04N19/172 , H04N19/186 , H04N19/46 , H04N19/91
摘要： A video encoder encodes a video into a data stream, the video encoder being configured to vary a granularity at which a Quantization Parameter—QP—is applied depending on an association of frames of the video to temporally hierarchical layers at which the video is encoded into the data stream. The technology also concerns a respective decoder, a respective method for encoding and decoding, and a computer program for implementing the methods.
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公开(公告)号：US12095989B2
公开(公告)日：2024-09-17
申请号：US17540527
申请日：2021-12-02
发明人： Gayathri Venugopal , Santiago De Luxán Hernández , Karsten Müller , Benjamin Bross , Heiko Schwarz , Detlev Marpe , Thomas Wiegand
IPC分类号： H04N19/19 , H04N19/119 , H04N19/176 , H04N19/593
CPC分类号： H04N19/119 , H04N19/176 , H04N19/593
摘要： In an encoder and a decoder for Region Based Intra Block Copy, the encoder may be configured for block-based encoding a picture into a data stream, and the decoder may be configured for block-based decoding a picture from a data stream. The encoder and decoder may further be configured to determine for a current block of the picture a difference between a first predetermined block and a second predetermined block inside a block search area. The encoder may encode the difference into the data stream and the decoder may derive the difference from the data stream. According to the innovative principle, the encoder and the decoder may be configured to partition the block search area into multiple block search regions.
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公开(公告)号：US11991355B2
公开(公告)日：2024-05-21
申请号：US17787218
申请日：2020-12-21
发明人： Benjamin Bross , Yago Sánchez De La Fuente , Robert Skupin , Martin Winken , Heiko Schwarz , Detlev Marpe , Thomas Schierl , Thomas Wiegand
IPC分类号： H04N19/117 , H04N19/105 , H04N19/132 , H04N19/80
CPC分类号： H04N19/117 , H04N19/105 , H04N19/132 , H04N19/80
摘要： Concepts are described, including encoding of a video into data stream and decoding of a data stream having a video encoded thereinto, using motion compensation prediction between pictures of equal resolution and pictures of different resolution, based on motion vectors at a half-sample resolution and on motion vectors at a different resolution using interpolation filters to obtain sub-sample values within a reference sample array. The interpolation filter is selected from two interpolation filter versions different in a higher edge preserving property, and the selection is depending on whether a current picture is equal in picture resolution to the reference sample array in horizontal and/or vertical dimension, and/or a constraint information in the data stream.
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公开(公告)号：US11973978B2
公开(公告)日：2024-04-30
申请号：US17471911
申请日：2021-09-10
发明人： Santiago De Luxán Hernández , Benjamin Bross , Phan Hoang Tung Nguyen , Valeri George , Heiko Schwarz , Detlev Marpe , Thomas Wiegand
IPC分类号： H04N19/593 , H04N19/157 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/61 , H04N19/70
CPC分类号： H04N19/593 , H04N19/157 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/61 , H04N19/70
摘要： Decoder for block-based decoding of a picture from a data stream, configured to decode an intra-coding mode for a predetermined block of the picture from the data stream, configured to decode a partition dimension flag for the predetermined block of the picture from the data stream and set a partition dimension depending on the partition dimension flag to be horizontal or vertical and the decoder is configured to partition, along the predetermined dimension, the predetermined block into transform partitions which are as wide as the predetermined block perpendicular to predetermined dimension, furthermore configured to decode, for each transform partition, a transform of a prediction residual from the data stream; intra-predicting the predetermined block depending on one or more already reconstructed samples neighboring the predetermined block in a manner depending on the intra-coding mode to obtain a predictor for the predetermined block; and reconstructing the predetermined block by correcting the predictor within each transform partition using the transform of the prediction residual decoded for the respective transform partition.
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