公开(公告)号：US20180249160A1

公开(公告)日：2018-08-30

申请号：US15962149

申请日：2018-04-25

Applicant: Huawei Technologies Co., Ltd. ,  GOTTFRIED WILHELM LEIBNIZ UNIVERSITÄT HANNOVER

Inventor： Zhijie ZHAO ,  Jiantong ZHOU ,  Yiqun LIU ,  Joern OSTERMANN

IPC: H04N19/124 ,  H04N19/50 ,  H04N19/176 ,  H04N19/91

CPC classification number: H04N19/124 ,  H04N19/107 ,  H04N19/146 ,  H04N19/176 ,  H04N19/50 ,  H04N19/91 ,  H04N19/94

Abstract: An encoder for obtaining training signals and to train a codebook for vector quantization of a video sequence of subsequent frames is provided, each frame being subdivided into coding blocks. The encoder comprises a scalar quantization unit configured to obtain, for each coding block of one or more training frames of the video sequence, a scalar quantized signal from a prediction error, an entropy coding unit configured to entropy code, for each coding block of each training frame, the scalar quantized signal into an output signal, a data selection unit configured to select, from among the training frames, one or several coding blocks depending on a cost function of their respective output signal, and to obtain, for each selected coding block, a training signal derived from the prediction error of the selected coding block and configured to train the codebook for vector quantization of the video sequence.

公开(公告)号：US20200304798A1

公开(公告)日：2020-09-24

申请号：US16895736

申请日：2020-06-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhijie ZHAO ,  Bastian WANDT ,  Yiqun LIU ,  Thorsten LAUDE ,  Bodo ROSENHAHN ,  Joern OSTERMANN

IPC: H04N19/136 ,  H04N19/103 ,  H04N19/17 ,  H04N19/543

Abstract: The present disclosure relates to encoding a decoding video employing texture coding. In particular, a texture region is identified within a video picture and a texture patch is determined for said region. Moreover, a set of parameters specifies luminance within the texture region (1001) by fitting the texture region samples to a two-dimensional polynomial function of the patch determined according to the set of parameters (1040); and/or motion within the texture region by fitting motion estimated between the texture region of the video picture and an adjacent picture to a two-dimensional polynomial The texture patch and the first set of parameters are then included into a bitstream which is output of the encoder and provided in this way to the decoder which reconstructs the texture based on the patch and the function applied to the patch.

公开(公告)号：US20180160142A1

公开(公告)日：2018-06-07

申请号：US15819801

申请日：2017-11-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhijie ZHAO ,  Yiqun LIU ,  Joern OSTERMANN

IPC: H04N19/573 ,  H04N19/82 ,  H04N19/65 ,  H04N19/513

Abstract: A frame buffer is adapted to store at least one reference frame of a video stream, said reference frame being different from a current frame of the video stream. A motion estimation unit is adapted to generate a motion vector by estimating motion between a reference block of the reference frame and a current block of the current frame. A blurring filter selection unit is adapted to select one of a plurality of blurring filters depending on the orientation of the motion vector. A filtering unit is adapted to generate a filtered reference block by applying the selected blurring filter to the reference block. A motion compensation unit is adapted to generate a filtered prediction block of the current block on the basis of the current block, the motion vector and the filtered reference block.

公开(公告)号：US20200336745A1

公开(公告)日：2020-10-22

申请号：US16895653

申请日：2020-06-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhijie ZHAO ,  Bastian WANDT ,  Yiqun LIU ,  Thorsten LAUDE ,  Bodo ROSENHAHN ,  Joern OSTERMANN

IPC: H04N19/132 ,  H04N19/137 ,  H04N19/625 ,  H04N19/186 ,  H04N19/176

Abstract: The present disclosure relates to encoding and decoding video by employing texture coding. In particular, a texture region is identified within a video picture and a texture patch is determined for the texture region. Moreover, a first set of parameters is derived specifying weighting factors for reconstructing spectral coefficients of the texture region by fitting the texture region in a spectral domain to a first function of the texture patch, the first function being defined by the first set of parameters. The texture patch and the first set of parameters are then included into a bitstream which is output by an encoder and provided in this way to the decoder which reconstructs the texture based on the patch and the function applied to the patch.

公开(公告)号：US20200304797A1

公开(公告)日：2020-09-24

申请号：US16895575

申请日：2020-06-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhijie ZHAO ,  Bastian WANDT ,  Yiqun LIU ,  Thorsten LAUDE ,  Joern OSTERMANN ,  Bodo ROSENHAHN

IPC: H04N19/136 ,  H04N19/167 ,  H04N19/17

Abstract: A texture region is identified within a video picture, and a texture patch is determined for the region. Clustering is performed to identify a texture region within the video image. The clustering is further refined. In particular, one or more brightness parameters of a polynomial is determined by fitting the polynomial to the identified texture region. In the identified texture region, samples are detected with a distance to the fitted polynomial exceeding a first threshold. A refined texture region is identified as the texture region excluding one or more of the detected samples. The refined texture region is encoded separately from portions of the video image not belonging to the refined texture region.