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1. 发明申请

WO2019002615A1 APPARATUS FOR BLOCK-BASED PREDICTIVE DECODING AND ENCODING AND CORRESPONDING METHODS 审中-公开
公开(公告)号：WO2019002615A1
公开(公告)日：2019-01-03
申请号：PCT/EP2018/067719
申请日：2018-06-29
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , WINKEN, Martin , HELLE, Philipp , WIEGAND, Thomas , MARPE, Detlev , RASCH, Jennifer , SCHÄFER, Michael , SCHWARZ, Heiko , SIEKMANN, Mischa , HENKEL, Anastasia
IPC分类号： H04N19/82 , H04N19/50 , H04N19/176 , H04N19/117
摘要： The invention refers to an apparatus (10) for block-based predictive decoding of a picture (200), comprising: an extractor (1 1) extracting from a data stream (100) filter information (20) about applying a diffusion filter (LDF, ADF), an initial prediction signal provider (12) providing an initial prediction signal (21) for a current block (22), a prediction signal modifier (13) providing in case of a positive filter information (20) a modified prediction signal (23) based on the initial prediction signal (21 ) and based on the diffusion filter (LDF, ADF), and a reconstructor (14) decoding a reconstructed version of the current block (22) based on the initial prediction signal (21) in case of a negative filter information (20) and based on the modified prediction signal (23) in case of a positive filter information (20). The invention also refers to an apparatus (10) for block-based predictive decoding of a picture (200) and to corresponding methods.

2. 发明申请

WO2022171841A2 ENCODER, DECODER AND METHODS FOR CODING A PICTURE USING A CONVOLUTIONAL NEURAL NETWORK 审中-公开
公开(公告)号：WO2022171841A2
公开(公告)日：2022-08-18
申请号：PCT/EP2022/053447
申请日：2022-02-11
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , SCHÄFER, Michael , PIENTKA, Sophie , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/59 , H04N19/124 , H04N19/147 , H04N19/172 , G06N3/04 , H04N19/13 , H04N19/137 , G06N3/0454
摘要： A coding concept for encoding a picture uses a multi-layered convolutional neural network for determining a feature representation of the picture, the feature representation comprising first to third partial representations which have mutually different resolutions. Further, an encoder for encoding a picture determines a quantization of the picture using a polynomial function which provides an estimated distortion associated with the quantization.

3. 发明申请

WO2020178352A1 USE-CASE DRIVEN CONTEXT MODEL SELECTION FOR HYBRID VIDEO CODING TOOLS 审中-公开
公开(公告)号：WO2020178352A1
公开(公告)日：2020-09-10
申请号：PCT/EP2020/055732
申请日：2020-03-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HELLE, Philipp , SCHÄFER, Michael , HINZ, Tobias , STALLENBERGER, Björn , MERKLE, Philipp , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/13 , H04N19/159 , H04N19/176
摘要： An apparatus is described that includes an encoder. The encoder receives image or video data, encodes the received image or video data and provides a bitstream representing the image or video data. The encoder includes a CABAC encoder. The CABAC encoder receives a binary valued syntax element associated with a block of the image or video data to be encoded, and encodes, using a selected context model, the binary valued syntax element into coded bits for the bitstream. The binary valued syntax element includes a tool flag indicating whether or not certain coding tool, like a linear weighted intra prediction, LWIP, is employed when encoding a block of the image or video data. For a block of the image or video data having an aspect ratio larger than 2 and to which the certain coding tool is applicable, a first context model for encoding the tool flag is selected from a group of one or more first context models, and for a block of the image or video data having an aspect ratio less than or equal to 2 and to which the certain coding tool is applicable, a second context model for encoding the tool flag is selected from a group of one or more second context models.

4. 发明申请

WO2021058640A1 EFFICIENT IMPLEMENTATION OF MATRIX-BASED INTRA-PREDICTION 审中-公开
公开(公告)号：WO2021058640A1
公开(公告)日：2021-04-01
申请号：PCT/EP2020/076697
申请日：2020-09-24
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , STALLENBERGER, Björn , SCHÄFER, Michael , MERKLE, Philipp , HINZ, Tobias , HELLE, Philipp , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/11 , H04N19/59 , H04N19/593 , H04N19/70
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.

5. 发明申请

WO2020260248A1 CODING USING MATRIX BASED INTRA-PREDICTION AND SECONDARY TRANSFORMS 审中-公开
公开(公告)号：WO2020260248A1
公开(公告)日：2020-12-30
申请号：PCT/EP2020/067446
申请日：2020-06-23
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HINZ, Tobias , HELLE, Philipp , MERKLE, Philipp , STALLENBERGER, Björn , SCHÄFER, Michael , BROSS, Benjamin , WINKEN, Martin , SIEKMANN, Mischa , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/11 , H04N19/12 , H04N19/159 , H04N19/176 , H04N19/61 , H04N19/105
摘要： There are disclosed techniques for matrix-based predicting a block of a picture efficiently. An embodiment relates to an apparatus for decoding a predetermined block (18) of a picture using intra-prediction, configured to select (602), based on the data stream, a predetermined intra prediction mode (604) out of a plurality (600) of intra-prediction modes which comprises a first set (508) of intra-prediction modes comprising a DC intra prediction mode (506) and angular prediction modes (500), and a second set (520) of matrix-based intra-prediction modes (510) according to each of which a matrix-vector product (512) between a vector (514) derived from reference samples (17) in a neighbourhood of the predetermined block and a prediction matrix (516) associated with the respective matrix-based intra-prediction mode is used to obtain a prediction vector (518), on the basis of which samples of the predetermined block are predicted. The apparatus is configured to derive a prediction signal (606) for the predetermined block using the predetermined intra-prediction mode and select (608) a subset (610) of one or more secondary transforms out of a set (612) of secondary transforms in a manner dependent on the predetermined intra prediction mode so that the subset (610) is nonempty in case of the predetermined intra prediction mode being contained in the first set (508) of intra-prediction modes and the predetermined intra prediction mode being contained in the second set (520) of matrix-based intra-prediction modes (510). Additionally the apparatus is configured to derive (614), from the data stream, a transformed version (616) of a prediction residual for the predetermined block (18), which is related to a spatial domain version (618) of the prediction residual of the predetermined block via a transform (T) defined by a concatenation of a primary transform (Tp) and a predetermined secondary transform (Ts) out of the subset (610) of secondary transforms applied onto a subset (622) of coefficients (620) of the primary transform, in case of the predetermined intra prediction mode being contained in the first set (508) of intraprediction modes and in case of the predetermined intra-prediction mode being contained in the second set (520) of matrix-based intra-prediction modes (510). The apparatus is configured to reconstruct (624) the predetermined block using the prediction signal and the prediction residual for the predetermined block (18).

6. 发明申请

WO2020249633A1 CODING OF INTRA-PREDICTION MODES 审中-公开
公开(公告)号：WO2020249633A1
公开(公告)日：2020-12-17
申请号：PCT/EP2020/066124
申请日：2020-06-10
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HINZ, Tobias , HELLE, Philipp , MERKLE, Philipp , STALLENBERGER, Björn , SCHÄFER, Michael , BROSS, Benjamin , WINKEN, Martin , SIEKMANN, Mischa , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/11 , H04N19/147 , H04N19/176 , H04N19/463 , H04N19/70
摘要： There are disclosed techniques for block-based predicting a block of a picture efficiently, like an apparatus (3000) for decoding a predetermined block (18) of a picture (10) using intra-prediction, configured to derive a set-selective syntax element (522) from the data stream (12) which indicates whether the predetermined block (18) is to be predicted using one of a first set (508) of intra-prediction modes comprising a DC intra prediction mode (506) and angular prediction modes (500). If the set-selective syntax element (522) indicates that the predetermined block (18) is to be predicted using one of the first set (508) of intra-prediction modes, the apparatus is configured to form a list (528) of most probable intra-prediction modes on the basis of intra-prediction modes (3050) using which neighbouring blocks (524, 526) neighbouring the predetermined block (18) are predicted, derive a MPM list index (534) from the data stream (12) which points into the list (528) of most probable intra-prediction modes onto a predetermined intra-prediction mode (3100) and intra-predict the predetermined block (18) using the predetermined intra-prediction mode (3100). If the set-selective syntax element (522) indicates that the predetermined block (18) is not to be predicted using one of the first set (508) of intra-prediction modes, the apparatus is configured to derive a further index (540; 546) from the data stream (12) which indicates a predetermined matrix-based intra-prediction mode (3200) out of a second set (520) of matrix-based intra-prediction modes (510), compute a matrix-vector product (512) between a vector (514, 400, 402) derived from reference samples (17) in a neighbourhood of the predetermined block (18) and a predetermined prediction matrix (516) associated with the predetermined matrix-based intra-prediction mode (3200) so as to obtain a prediction vector (518), and predict samples of the predetermined block (18) on the basis of the prediction vector (518). The list (528) of most probable intra-prediction modes is formed on the basis of intra-prediction modes (3050) using which neighbouring blocks (524, 526) neighbouring the predetermined block (18) are predicted such that the list (528) of most probable intra- prediction modes is free of the DC intra prediction mode (506) in case of the neighbouring blocks (524, 526) being predicted by any of the angular intra prediction modes (500).

7. 发明申请

WO2021110943A1 MATRIX BASED INTRA PREDICTION WITH MODE-GLOBAL SETTINGS 审中-公开
公开(公告)号：WO2021110943A1
公开(公告)日：2021-06-10
申请号：PCT/EP2020/084691
申请日：2020-12-04
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HINZ, Tobias , HELLE, Philipp , MERKLE, Philipp , STALLENBERGER, Björn , SCHÄFER, Michael , BROSS, Benjamin , WINKEN, Martin , SIEKMANN, Mischa , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/11 , H04N19/147 , H04N19/176 , H04N19/593 , H04N19/70 , H04N19/156
摘要： Apparatus for decoding a predetermined block (18) of a picture using intra-prediction, configured to read, from the data stream (12), a mode index (200), the mode index pointing to one out of a list (204) of matrix-based intra-prediction modes. Additionally, 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 neighborhood 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. For each matrix-based intra-prediction mode, all entries of the prediction matrix (19) associated with the respective matrix-based intra-prediction mode are represented by a fixed point representation of a predetermined bit-depth, the predetermined bit-depth being equal for the matrix-based intra- prediction modes. Furthermore, the apparatus is configured to, for each matrix-based intra-prediction mode, compute the matrix-vector product (206) between the input vector (102) and the prediction matrix (19) associated with the respective matrix-based intra-prediction mode (k) by performing, for each component of the output vector, a right shift at a number of bits which is equal for the matrix-based intra-prediction modes.

8. 发明申请

WO2020053394A1 AFFINE LINEAR WEIGHTED INTRA PREDICTIONS 审中-公开
公开(公告)号：WO2020053394A1
公开(公告)日：2020-03-19
申请号：PCT/EP2019/074504
申请日：2019-09-13
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , SCHWARZ, Heiko , HELLE, Philipp , SCHÄFER, Michael , RISCHKE, Roman , HINZ, Tobias , MERKLE, Philipp , STALLENBERGER, Björn , WINKEN, Martin , SIEKMANN, Mischa , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/11 , H04N19/159 , H04N19/18 , H04N19/48 , H04N19/593
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 disclosed a decoder (54) for decoding a picture (10) from a data stream (12, 80). The decoder may be configured to predict a predetermined block (18) of the picture (10) by mapping a set of P neighboring samples (17'c, 17'a) neighboring the predetermined block (18) using a linear or affine linear transformation (17M) onto a set of Q predicted values for samples of the predetermined block (18). The linear or affine linear transformation (17M) may comprise P*Q weighting factors among which at least ¼ P*Q weighting factors are non-zero weighting values, which comprise, for each of the Q predicted values, a series of P weighting factors relating to the respective predicted value, wherein the series, when being arranged one below the other according to a raster scan order among the samples of the predetermined block (18), form an envelope which is omnidirectionally non- linear.

9. 发明申请

WO2021198402A1 MIP FOR ALL CHANNELS IN THE CASE OF 4:4:4-CHROMA FORMAT AND OF SINGLE TREE 审中-公开
公开(公告)号：WO2021198402A1
公开(公告)日：2021-10-07
申请号：PCT/EP2021/058558
申请日：2021-04-01
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HINZ, Tobias , HELLE, Philipp , MERKLE, Philipp , STALLENBERGER, Björn , SCHÄFER, Michael , BROSS, Benjamin , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/105 , H04N19/11 , H04N19/134 , H04N19/186 , H04N19/593
摘要： Block based decoder configured to partition a picture (10) of more than one color component (101, 102) and of a color sampling format, according to which each color component (101, 102) is equally sampled, into blocks using a partitioning scheme according to which the picture (10) is equally partitioned with respect to each color component (101, 102). Additionally, the block based decoder is configured to decode a first color component (101) of the picture (10) in units of the blocks with selecting, for each of intra-predicted first color component blocks (18'11-18'1n) of the picture (10), one out of a first set (508) of intra-prediction modes. The first set (508) comprises matrix-based intra prediction modes (5101 to 510m) according to each of which a block inner (18) is predicted by deriving a sample value vector (514) out of references samples (17), neighboring the block inner (18), computing a matrix-vector product (512) between the sample value vector (514) and a prediction matrix (516) associated with the respective matrix-based intra prediction mode (510i to 510m) so as to obtain a prediction vector (518), and predicting samples in the block inner (18) on the basis of the prediction vector (518). Additionally, the block based decoder is configured to decode a second color component (102) of the picture (10) in units of the blocks by intra-predicting a predetermined second color component block (182) of the picture using the matrix-based intra prediction mode selected for a co-located intra-predicted first color component block (181).

10. 发明申请

WO2020127811A2 INTRA PREDICTIONS USING LINEAR OR AFFINE TRANSFORMS WITH NEIGHBOURING SAMPLE REDUCTION 审中-公开
公开(公告)号：WO2020127811A2
公开(公告)日：2020-06-25
申请号：PCT/EP2019/086428
申请日：2019-12-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： PFAFF, Jonathan , HELLE, Philipp , SCHÄFER, Michael , RISCHKE, Roman , HINZ, Tobias , MERKLE, Philipp , STALLENBERGER, Björn , WINKEN, Martin , SIEKMANN, Mischa , SCHWARZ, Heiko , MARPE, Detlev , WIEGAND, Thomas
IPC分类号： H04N19/176 , H04N19/182 , H04N19/59 , H04N19/593
摘要： There are provided techniques for encoding/decoding of video signals, 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.

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