公开(公告)号：US10440399B2

公开(公告)日：2019-10-08

申请号：US15348686

申请日：2016-11-10

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Li Zhang ,  Jianle Chen ,  Wei-Jung Chien

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/91 ,  H04N19/44 ,  H04N19/60 ,  H04N19/13 ,  H04N19/61 ,  H04N19/593 ,  H04N19/157 ,  H04N19/18 ,  H04N19/176 ,  H04N19/105 ,  H04N19/11

Abstract: An example device for decoding video data includes a memory configured to store video data and one or more processors implemented using digital logic circuitry, the processors configured to determine a context model for entropy decoding a value for a sign of a transform coefficient of a block of the video data based on one or more sign values of neighboring transform coefficients and entropy decode the value for the sign of the transform coefficient using the context model.

公开(公告)号：US10440396B2

公开(公告)日：2019-10-08

申请号：US15937687

申请日：2018-03-27

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/80 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/107 ,  H04N19/159 ,  H04N19/117 ,  H04N19/14 ,  H04N19/82 ,  H04N19/167

Abstract: A video decoder can be configured to determine first filter information for a first luma block unit of a current block; filter the first luma block unit based on the first filter information; determine second filter information for a second luma block unit of the current block; filter the second luma block unit based on the second filter information; and derive third filter information for a chroma block unit of the current block based on filter information determined for multiple luma block units, wherein the filter information determined for the multiple luma block units includes the first filter information for the first luma block unit and the second filter information for the second luma block unit; filter the chroma block unit based on the third filter information; and output a decoded version of the current block.

公开(公告)号：US10419757B2

公开(公告)日：2019-09-17

申请号：US15691287

申请日：2017-08-30

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Li Zhang ,  Hsiao-Chiang Chuang ,  Marta Karczewicz

IPC: H04N19/102 ,  H04N19/105 ,  H04N19/126 ,  H04N19/132 ,  H04N19/117 ,  H04N19/124 ,  H04N19/182 ,  H04N19/186 ,  H04N19/513 ,  H04N19/80 ,  H04N19/82 ,  H04N19/635

Abstract: A video coding device generates first and second components of a current picture. Additionally, the video coding device determines a first parameter and a second parameter. The first and second parameters are each based on a value of a current sample in the first component. The video coding device applies a cross-component filter to the current sample, thereby determining a filtered value of the current sample based on the first parameter, the second parameter, and one or more cross-component samples. Each of the one or more cross-component samples is in the second component.

公开(公告)号：US10404999B2

公开(公告)日：2019-09-03

申请号：US14912152

申请日：2014-09-26

Applicant: QUALCOMM Incorporated

Inventor： Hongbin Liu ,  Ying Chen ,  Li Zhang ,  Xin Zhao

IPC: H04N19/597 ,  H04N19/70 ,  H04N19/13 ,  H04N19/18 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/593 ,  H04N19/11 ,  H04N19/91

Abstract: A video coder may perform a simplified depth coding (SDC) mode, including simplified residual coding, to code a depth block according to any of a variety of, e.g., at least three, depth intra prediction modes. For example, the video coder may perform the SDC mode for coding a depth block according to depth modeling mode (DMM) 3, DMM 4, or a region boundary chain coding mode. In such examples, the video coder may partition the depth block, and code respective DC residual values for each partition. In some examples, the video coder may perform the SDC mode for coding a depth block according to an intra prediction mode, e.g., an HEVC base specification intra prediction mode, such as a DC intra prediction mode or one of the directional intra prediction modes. In such examples, the video coder may code a single DC residual value for the depth block.

公开(公告)号：US20190246143A1

公开(公告)日：2019-08-08

申请号：US16269349

申请日：2019-02-06

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Kai Zhang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/64 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/503 ,  H04N19/186 ,  H04N19/176

CPC classification number: H04N19/647 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/503

Abstract: This disclosure describes example techniques that a video coder (e.g., video encoder or video decoder) may utilize to determine a block vector for a chroma block where the partition trees for the chroma component and the luma component are different (e.g., decoupled partition trees).

公开(公告)号：US20190230353A1

公开(公告)日：2019-07-25

申请号：US16250794

申请日：2019-01-17

Applicant: QUALCOMM Incorporated

Inventor： Akshay GADDE ,  Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/14 ,  H04N19/196 ,  H04N19/86 ,  H04N19/61

Abstract: Codecs that use larger blocks may have larger boundary regions that may benefit from filtering. In some embodiments, the deblocking filter determines filters and/or a number of samples of the block to be filtered based on block dimensions. For example, In one embodiment, deblocking filter parameters for the video block are determined based on at least one dimension of the size of the video block. The filter parameters include a filter to be applied or a number of pixels along a boundary with a neighboring block to which the filter is to be applied determined based on the at least one dimension.

公开(公告)号：US20190200043A1

公开(公告)日：2019-06-27

申请号：US16211694

申请日：2018-12-06

Applicant: QUALCOMM Incorporated

Inventor： Hilmi Enes Egilmez ,  Li Zhang ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/44 ,  H04N19/13 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/13 ,  H04N19/157 ,  H04N19/172 ,  H04N19/197 ,  H04N19/44 ,  H04N19/91

Abstract: A method of decoding video data includes receiving, by processing circuitry, a video bitstream including encoded representations of one or more syntax elements of a coded unit and initializing, by the processing circuitry, a respective probability state for each bin of a plurality of bins for the one or more syntax elements based on a comparison of a parameter associated with the coded unit and a respective threshold of a plurality of thresholds. The method further includes performing, by the processing circuitry, inverse binary arithmetic coding on the encoded representations of the one or more syntax elements to obtain each bin of the plurality of bins using a respective probability state for the bin, inverse binarizing, by the processing circuitry, the plurality of bins to obtain the one or more syntax elements, and decoding, by the processing circuitry, the video data based on the one or more syntax elements.

公开(公告)号：US10334259B2

公开(公告)日：2019-06-25

申请号：US14098369

申请日：2013-12-05

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Ying Chen ,  Marta Karczewicz

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/31 ,  H04N19/597 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/30 ,  H04N19/61 ,  H04N19/103 ,  H04N19/107 ,  H04N19/136 ,  H04N19/187 ,  H04N19/577

Abstract: In an example, a method of coding video data includes determining, for a first block of video data in a first layer of video data, a temporal motion vector and associated temporal reference picture for predicting the first block, where the temporal reference picture has a picture order count value. The method also includes determining a disparity reference block in a disparity reference picture indicated by a disparity vector associated with the first block, and determining whether a decoded picture buffer contains a temporal-disparity reference picture in the second view and having the picture order count value of the temporal reference picture. When the decoded picture buffer does not contain a temporal-disparity reference picture in the second view and having the picture order count value of the temporal reference picture, the method includes modifying an inter-view residual prediction process for predicting residual data of the first block.

公开(公告)号：US20190166363A1

公开(公告)日：2019-05-30

申请号：US16200197

申请日：2018-11-26

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/513

Abstract: A method of coding video data, the method comprising coding a block of video data to obtaining a coded block of video data, applying an adaptive loop filter defined by a filter support to samples of the coded block of video data, including using padded samples for portions of the filter support that are outside of the block, and outputting the coded block of video data after applying adaptive loop filtering to the coded block of video data.

公开(公告)号：US10298930B2

公开(公告)日：2019-05-21

申请号：US15942035

申请日：2018-03-30

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Li Zhang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/96 ,  H04N19/119 ,  H04N19/196

Abstract: In an example, a method of coding video data may include selecting, as part of an entropy coding process, a context for a syntax element associated with a current coding unit (CU) based on information relating to CU depth of one or more neighboring CUs relative to the current CU. The syntax element may represent whether the current CU is split into sub-CUs. The method may include entropy coding the syntax element based on the selected context.