公开(公告)号：US12160568B2

公开(公告)日：2024-12-03

申请号：US18195362

申请日：2023-05-09

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： Jens Brandenburg ,  Tobias Hinz ,  Adam Wieckowski ,  Jackie Ma ,  Valeri George ,  Christian Lehmann ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand ,  Robert Skupin ,  Yago Sánchez De La Fuente ,  Thomas Schierl

IPC: H04N7/12 ,  H04N19/107 ,  H04N19/11 ,  H04N19/172 ,  H04N19/176 ,  H04N19/513 ,  H04N19/563 ,  H04N19/593

Abstract: Video codec for supporting temporal inter-prediction, configured to perform padding of an area of a referenced portion of a reference picture which extends beyond a border of the reference picture, which referenced portion is referenced by an inter predicted block of a current picture by selecting one of a plurality of intra-prediction modes, and padding the area using the selected intra-prediction mode.

公开(公告)号：US12126804B2

公开(公告)日：2024-10-22

申请号：US17698549

申请日：2022-03-18

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Benjamin Bross ,  Phan Hoang Tung Nguyen ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand

IPC: H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593

CPC classification number: H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593

Abstract: 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.

公开(公告)号：US12075091B2

公开(公告)日：2024-08-27

申请号：US17962391

申请日：2022-10-07

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： 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: H04N19/61 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44

CPC classification number: H04N19/61 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44

Abstract: 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

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： Paul Haase ,  Christian Rudat ,  Heiner Kirchhoffer ,  Phan Hoang Tung Nguyen ,  Mischa Siekmann ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand

IPC: H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/172

CPC classification number: H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60

Abstract: 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).

公开(公告)号：US11706413B2

公开(公告)日：2023-07-18

申请号：US17362869

申请日：2021-06-29

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Benjamin Bross ,  Phan Hoang Tung Nguyen ,  Paul Keydel ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand ,  Christian Helmrich

IPC: H04N19/12 ,  H04N19/129 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/12 ,  H04N19/129 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

Abstract: 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.

公开(公告)号：US20230025784A1

公开(公告)日：2023-01-26

申请号：US17959276

申请日：2022-10-03

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Santiago De Luxán Hernández ,  Philipp Merkle ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: 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.

公开(公告)号：US11363268B2

公开(公告)日：2022-06-14

申请号：US16825533

申请日：2020-03-20

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Christian Helmrich ,  Thomas Wiegand ,  Adam Wieckowski ,  Heiko Schwarz ,  Detlev Marpe ,  Sebastian Bosse ,  Benjamin Bross

IPC: H04N19/124 ,  H04N19/176

Abstract: 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.

公开(公告)号：US11297338B2

公开(公告)日：2022-04-05

申请号：US17001023

申请日：2020-08-24

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Christian Helmrich ,  Heiko Schwarz ,  Detlev Marpe ,  Thomas Wiegand ,  Adam Wieckowski ,  Mischa Siekmann ,  Benjamin Bross

IPC: H04N19/31 ,  H04N19/172 ,  H04N19/186 ,  H04N19/46 ,  H04N19/91

Abstract: 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.

公开(公告)号：US12160606B2

公开(公告)日：2024-12-03

申请号：US18094975

申请日：2023-01-09

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： 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: H04N19/59 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

Abstract: 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.

公开(公告)号：US20240373064A1

公开(公告)日：2024-11-07

申请号：US18775935

申请日：2024-07-17

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： 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: H04N19/61 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44

Abstract: 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.