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1. 发明申请

US20210218960A1 AFFINE LINEAR WEIGHTED INTRA PREDICTIONS 有权
公开(公告)号：US20210218960A1
公开(公告)日：2021-07-15
申请号：US17198750
申请日：2021-03-11
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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.

2. 发明申请

US20210014531A1 Intra-prediction mode concept for block-wise picture coding 有权
公开(公告)号：US20210014531A1
公开(公告)日：2021-01-14
申请号：US17032113
申请日：2020-09-25
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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.

3. 发明公开

US20240298033A1 EFFICIENT IMPLEMENTATION OF MATRIX-BASED INTRA-PREDICTION 审中-公开
公开(公告)号：US20240298033A1
公开(公告)日：2024-09-05
申请号：US18661654
申请日：2024-05-12
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Björn STALLENBERGER , Michael SCHAFER , Philipp MERKLE , Tobias HINZ , Philipp HELLE , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND , Benjamin BROSS , Martin WINKEN , Mischa SIEKMANN
IPC分类号： H04N19/61 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
CPC分类号： H04N19/619 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
摘要： A method for decoding a predetermined block of a picture using intra-prediction by reading, for each of predetermined intra-prediction blocks, from a data stream, a mode index identifying a matrix-based intra-prediction mode is disclosed. Samples of each predetermined intra-prediction block are predicted by computing a matrix-vector product between an input vector derived from reference samples and a prediction matrix associated with the identified matrix-based intra-prediction mode (k)-and associating components of an output vector obtained by the matrix-vector product onto sample positions of the predetermined block. Further predetermined intra-predicted blocks of the picture are predicted to obtain a prediction signal. A transformation flag is decoded from the data stream using context adaptive binary arithmetic coding, and a prediction residual is decoded and re-transformed using a reverse transformation based on the transformation flag to obtain a prediction residual signal. The prediction residual signal is used to correct the prediction signal.

4. 发明公开

US20230276048A1 Affine Linear Weighted Intra Predictions 审中-公开
公开(公告)号：US20230276048A1
公开(公告)日：2023-08-31
申请号：US18143587
申请日：2023-05-04
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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 , H04N19/593 , H04N19/48 , H04N19/176
CPC分类号： H04N19/11 , H04N19/593 , H04N19/48 , H04N19/176
摘要： Techniques for block wise encoding and decoding may be applied to encoders, decoders, and methods for encoding or decoding. In one example, there is provided a technique to decode or encode a predetermined block of the picture by assigning, based on a first signalization in the data stream, the predetermined block to a first set or a 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; and predicting the predetermined block using an intra prediction mode onto which the index points. The decoder or 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.

5. 发明申请

US20220116606A1 CODING USING MATRIX BASED INTRA-PREDICTION AND SECONDARY TRANSFORMS 有权
公开(公告)号：US20220116606A1
公开(公告)日：2022-04-14
申请号：US17559559
申请日：2021-12-22
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Tobias HINZ , Philipp HELLE , Philipp MERKLE , Björn STALLENBERGER , Michael SCHÄFER , Benjamin BROSS , Martin WINKEN , Mischa SIEKMANN , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/12 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
摘要： An apparatus configured to select a predetermined intra prediction mode out of a plurality of intra-prediction modes which includes a first set of intra-prediction modes and a second set of matrix-based intra-prediction modes. The apparatus is configured to select a subset of one or more secondary transforms dependent on the predetermined intra prediction mode so that the subset is nonempty in case of the predetermined intra prediction mode being contained in the first set of intra-prediction modes or in the second set of matrix-based intra-prediction modes. The apparatus is configured to derive a transformed version of a prediction residual for a predetermined block, which is related to a spatial domain version of the prediction residual of the predetermined block via a transform defined by a concatenation of a primary transform and a predetermined secondary transform out of the subset of secondary transforms.

6. 发明申请

US20210392331A1 USE-CASE DRIVEN CONTEXT MODEL SELECTION FOR HYBRID VIDEO CODING TOOLS 有权
公开(公告)号：US20210392331A1
公开(公告)日：2021-12-16
申请号：US17460996
申请日：2021-08-30
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Philipp HELLE , Michael SCHÄFER , Tobias HINZ , Björn STALLENBERGER , Philipp MERKLE , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/13 , H04N19/70 , H04N19/46 , H04N19/176
摘要： An apparatus includes an encoder, which receives image or video data, encodes the data and provides a bitstream representing the data. The encoder includes a CABAC encoder, which receives a binary valued syntax element associated with a block of the data to be encoded, and encodes, using a selected context model, the syntax element into coded bits for the bitstream. The syntax element includes a tool flag indicating whether or not certain coding tool, like linear weighted intra prediction, is employed when encoding a block of the data. For a block of the data which exhibits an aspect ratio larger than 2 and for a block of the data which exhibits an aspect ratio less than or equal to 2, and to which blocks the certain coding tool is applicable, first and second context models for encoding the tool flag are selected from a group of one or more first and second context models, respectively.

7. 发明公开

US20240275971A1 USE-CASE DRIVEN CONTEXT MODEL SELECTION FOR HYBRID VIDEO CODING TOOLS 审中-公开
公开(公告)号：US20240275971A1
公开(公告)日：2024-08-15
申请号：US18647776
申请日：2024-04-26
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Philipp HELLE , Michael SCHÄFER , Tobias HINZ , Björn STALLENBERGER , Philipp MERKLE , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： H04N19/13 , H04N19/176 , H04N19/46 , H04N19/70
CPC分类号： H04N19/13 , H04N19/176 , H04N19/46 , H04N19/70
摘要： An apparatus includes an encoder, which receives image or video data, encodes the data and provides a bitstream. The encoder includes a CABAC encoder, which receives a binary valued syntax element associated with a block of the data to be encoded, and encodes, using a selected context model, the syntax element into coded bits for the bitstream. The syntax element includes a tool flag indicating whether or not certain coding tool is employed when encoding a block of the data. For a block of the data which exhibits an aspect ratio larger than 2 and for a block of the data which exhibits an aspect ratio less than or equal to 2, and to which blocks the certain coding tool is applicable, first and second context models for encoding the tool flag are selected from a group of one or more first and second context models, respectively.

8. 发明公开

US20230328287A1 Efficient Implementation of Matrix-Based Intra-Prediction 审中-公开
公开(公告)号：US20230328287A1
公开(公告)日：2023-10-12
申请号：US17763624
申请日：2020-09-24
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Björn STALLENBERGER , Michael SCHAEFER , Philipp MERKLE , Tobias HINZ , Philipp HELLE , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND , Benjamin BROSS , Martin WINKEN , Mischa SIEKMANN
IPC分类号： H04N19/61 , H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46
CPC分类号： H04N19/619 , H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/46
摘要： Apparatus (54) for decoding a predetermined block (18) of a picture using intra-prediction, configured to read, from a data stream (12), a mode index (200) using a binarization code (202). The mode index (200) points to one out of a list (204) of matrix-based intra-prediction modes. The apparatus is configured to predict samples (108) of the predetermined block (18) by computing a matrix-vector product (206) between an input vector (102) derived from reference samples (17) in a neighbourhood of the predetermined block (18) and a prediction matrix (19) associated with the matrix-based intra-prediction mode (k) pointed to by the mode index (200) and associating components (210) of an output vector (208) obtained by the matrix-vector product (206) onto sample positions (104) of the predetermined block. The list (204) of matrix-based intra-prediction modes consists of an even number of matrix-based intra-prediction modes. The list (204) of matrix-based intra-prediction modes consists of pairs (212) of matrix-based intra-prediction modes, and, for each pair (212) of matrix-based intra-prediction modes, the prediction matrix (19) associated with a first matrix-based intra-prediction mode of the respective pair (212) of matrix-based intra-prediction modes is equal to the prediction matrix (19) associated with a second matrix-based intra-prediction mode of the respective pair (212) of matrix-based intra-prediction modes. For each pair (212) of matrix-based intra-prediction modes, the apparatus is configured so that, if the matrix-based intra-prediction mode pointed to by the mode index (200) is the first matrix-based intra-prediction mode of the respective pair (212) of matrix-based intra-prediction modes, an association of the reference samples (17) in the neighbourhood of the predetermined block (18) with components (214) of the input vector (112) and of the sample positions (104) of the predetermined block (18) with the components (210) of the output vector (208) is transposed relative to the association in case of the matrix-based intra-prediction mode pointed to by the mode index (200) being the second matrix-based intra-prediction mode of the respective pair (212) of matrix-based intra-prediction modes. Furthermore, the apparatus is configured to read the mode index (200) using the binarization code (202) from the data stream (12) in a manner so that for each pair (212) of matrix-based intra-prediction modes the first matrix-based intra-prediction mode is assigned a first codeword and the second matrix-based intra-prediction mode is assigned a second codeword and both codewords are equal in length.

9. 发明申请

US20220058239A1 BLOCK-BASED PREDICTION 有权
公开(公告)号：US20220058239A1
公开(公告)日：2022-02-24
申请号：US17520012
申请日：2021-11-05
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Jonathan PFAFF , Tobias HINZ , Philipp HELLE , Philipp MERKLE , Björn STALLENBERGER , Michael SCHÄFER , Benjamin BROSS , Martin WINKEN , Mischa SIEKMANN , Heiko SCHWARZ , Detlev MARPE , Thomas WIEGAND
IPC分类号： G06F17/16 , G06F17/15 , G06F7/483 , G06N20/00
摘要： Apparatus for predicting a predetermined block of a picture using a plurality of reference samples The apparatus is configured to form a sample value vector out of the plurality of reference samples, derive from the sample value vector a further vector onto which the sample value vector is mapped by a predetermined invertible linear transform, compute a matrix-vector product between the further vector and a predetermined prediction matrix so as to obtain a prediction vector, and predict samples of the predetermined block on the basis of the prediction vector.

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