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1.发明公开公开(公告)号：US20240292019A1
公开(公告)日：2024-08-29
申请号：US18656189
申请日：2024-05-06
发明人： Benjamin BROSS , Martin WINKEN , Anastasia HENKEL , Paul KEYDEL , Ivan ZUPANCIC , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/52 , H04N19/117 , H04N19/186 , H04N19/70
CPC分类号： H04N19/52 , H04N19/117 , H04N19/186 , H04N19/70
摘要： An encoder for hybrid video coding, the encoder for providing an encoded representation of a video sequence on the basis of an input video content, and the encoder configured to: determine one or more syntax elements related to a portion of the video sequence; select a processing scheme to be applied to the portion of the video sequence based a property described by on the one or more syntax elements, the processing scheme for acquiring a sample for a motion-compensated prediction at an integer and/or fractional location within the portion of the video sequence; encode an index indicating the selected processing scheme such that a given encoded index value represents different processing schemes depending on the property described by the one or more syntax elements; and provide, as the encoded representation of the video sequence, a bit stream including the one or more syntax elements and the encoded index.
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公开(公告)号：US20240048688A1
公开(公告)日：2024-02-08
申请号：US18477292
申请日：2023-09-28
发明人： Valeri GEORGE , Tobia HINZ , Jackie MA , Jens BRANDENBURG , Christian LEHMANN , Adam WIECKOWSKI , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND , Thomas SCHIERL
IPC分类号： H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/82
CPC分类号： H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/82
摘要： A video encoder is disclosed that is configured to encode a slice of a current picture into a data stream by partitioning the slice into rows of Coding Tree Units (CTUs), select a CTU dependency offset for the slice out of a plurality of CTU dependency offsets, the CTU dependency offset indicating a minimum CTU offset between consecutive CTU rows to be obeyed by a decoder when decoding CTU rows in parallel, and signal the CTU dependency offset in the data stream. The CTU dependency offset is selected based on a slice type of the slice.
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3.发明公开公开(公告)号：US20230328242A1
公开(公告)日：2023-10-12
申请号：US18208952
申请日：2023-06-13
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 bocks. 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：US20230044030A1
公开(公告)日：2023-02-09
申请号：US17789993
申请日：2020-12-29
IPC分类号： H04N19/46 , H04N19/176 , H04N19/174
摘要： A video decoder employs context-adaptive binary arithmetic coding for decoding a video from a data stream. The video decoder determines a parametrization for the context-adaptive binary arithmetic coding.
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公开(公告)号：US20210289215A1
公开(公告)日：2021-09-16
申请号：US17337898
申请日：2021-06-03
IPC分类号： H04N19/176 , H04N19/186 , H04N19/132 , H04N19/136 , H04N19/107 , H04N19/593 , H04N19/503
摘要： A decoder for block-based decoding of picture data of a picture is configured to decode a current block of the picture by determining first and second sets of luma in a neighborhood of the current block, the first set of luma samples having smaller luma values than the second set of luma samples, fitting a straight-line having a linear function through first and second pairs of luma-chroma samples, wherein the first and second pairs of luma-chroma samples are determined based on the first and second sets of luma samples, respectively, and on first and second corresponding chroma samples, respectively, in said neighborhood of the current block, and predicting chroma samples of the current block using luma samples of the current block and said linear function. The present proposal further concerns a respective encoder and corresponding methods for encoding and decoding.
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公开(公告)号：US20210218960A1
公开(公告)日：2021-07-15
申请号：US17198750
申请日：2021-03-11
发明人： Jonathan PFAFF , Heiko SCHWARZ , Philipp HELLE , Michael SCHÄFER , Roman RISCHKE , Tobias HINZ , Philipp MERKLE , Björn STALLENBERGER , Martin WINKEN , Mischa SIEKMANN , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/11 , H04N19/176 , H04N19/593 , H04N19/48
摘要： There are disclosed techniques for block wise encoding and decoding. The techniques may be applied to encoders, decoders, and methods for encoding and/or decoding.
In one example, there is provided a technique to decode (resp. decode) a predetermined block of the picture by assigning, based on a first signalization in the data stream, the predetermined block to the first set or the second set, sorting the assigned set of intra-prediction modes according to intra-prediction modes used for neighboring blocks, neighboring the predetermined block, to obtain a list of intra prediction modes, deriving, for the predetermined block, from the data stream, an index into the list of intra prediction modes, predicting the predetermined block using an intra prediction mode onto which the index points. The decoder (resp. encoder), if the assigned set is the first set of intra-prediction modes, in sorting the assigned set, uses a second mapping which maps each intra-prediction mode of the second set of prediction modes onto a representative one in the first set of intra-prediction modes.-
公开(公告)号：US20210136385A1
公开(公告)日：2021-05-06
申请号：US17133736
申请日：2020-12-24
IPC分类号： H04N19/13 , H04N19/46 , H04N19/189 , H04N19/176
摘要： Concepts for transform coefficient block coding are described which enable coding of coefficients of a transform block in a manner suitable for dependent quantization and effectively implementable by entropy coding in terms of coding efficiency.
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公开(公告)号：US20210120240A1
公开(公告)日：2021-04-22
申请号：US17135058
申请日：2020-12-28
发明人： Benjamin BROSS , Philipp MERKLE , Simone WALTER , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND , Paul KEYDEL
IPC分类号： H04N19/117 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： A video encoder is configured to encode, by block based predictive encoding, pictures of a video into coding data, wherein the block based predictive encoding includes an intra-picture prediction. The video encoder is configured to use, for the intra-picture prediction, for encoding a prediction block of a picture, a plurality of nearest reference samples of the picture directly neighboring the prediction block and a plurality of extended reference samples, each extended reference sample of the plurality of extended reference samples separated from the prediction block at least by one nearest reference sample of the plurality of reference samples. The video encoder is further configured to sequentially determine an availability or unavailability of each of the plurality of nearest reference samples and to substitute a nearest reference sample being determined as unavailable by a substitution sample. The video encoder is configured to use the substitution sample for the intra-picture prediction.
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公开(公告)号：US20210014531A1
公开(公告)日：2021-01-14
申请号：US17032113
申请日：2020-09-25
发明人： Jonathan PFAFF , Philipp HELLE , Philipp MERKLE , Björn STALLENBERGER , Mischa SIEKMANN , Martin WINKEN , Adam WIECKOWSKI , Wojciech SAMEK , Stephan KALTENSTADLER , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/593 , H04N19/176 , H04N19/61 , H04N19/11 , H04N19/105
摘要： An apparatus for block-wise decoding a picture from a data stream and/or encoding a picture into a data stream, the apparatus supporting at least one intra-prediction mode according to which the intra-prediction signal for a block of a predetermined size of the picture is determined by applying a first template of samples which neighbours the current block onto a neural network. The apparatus may be configured, for a current block differing from the predetermined size, to: resample a second template of samples neighboring the current block, so as to conform with the first template so as to obtain a resampled template; apply the resampled template of samples onto the neural network so as to obtain a preliminary intra-prediction signal; and resample the preliminary intra-prediction signal so as to conform with the current block so as to obtain the intra-prediction signal for the current block.
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公开(公告)号：US20240348805A1
公开(公告)日：2024-10-17
申请号：US18753366
申请日：2024-06-25
IPC分类号： H04N19/189 , H04N19/119 , H04N19/13 , H04N19/159 , H04N19/176 , H04N19/46
CPC分类号： H04N19/189 , H04N19/119 , H04N19/13 , H04N19/159 , H04N19/176 , H04N19/46
摘要： A video decoder is configured to decode a plurality of video frames which are subdivided into a set of one or more slices. The decoder evaluates slice type information indicating whether a slice is encoded using an independent coding mode having no prediction of video content of a current frame on the basis of a video content of a previous frame, or using a single-predictive mode having a prediction of a block of pixels on the basis of one block of pixels of a previous frame, or using a bi-predictive mode having a prediction of a block of pixels on the basis of two or more blocks of pixels of one or more previous frames, to select a mode of operation for decoding a slice.
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