公开(公告)号：US20210105491A1

公开(公告)日：2021-04-08

申请号：US17066405

申请日：2020-10-08

Applicant: QUALCOMM Incorporated

Inventor： Marta KARCZEWICZ ,  Hongtao WANG ,  Muhammed Zeyd COBAN

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/184

Abstract: Embodiments are directed to systems and methods of using a Rice code in video coding. In one embodiment includes a method of encoding or decoding video data, e.g., on a video encoder or decoder. In particular, embodiments are directed to determining a Rice parameter for encoding or decoding syntax elements related to coefficient levels.

公开(公告)号：US20210092414A1

公开(公告)日：2021-03-25

申请号：US17028928

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

Inventor： Marta KARCZEWICZ ,  Hongtao Wang ,  Yung-Hsuan Chao ,  Muhammed Zeyd Coban

IPC: H04N19/189 ,  H04N19/105 ,  H04N19/70 ,  H04N19/176

Abstract: Embodiments are directed to systems and methods of using rice code in video coding. In one embodiment includes a method of encoding or decoding video data, e.g., on a video encoder or decoder. The method includes determining available residual coefficients neighboring a current position in a transform unit of video data and determining a sum of the available residual coefficients. The method further includes modifying the sum based on the number of available residual coefficients and determining a rice parameter based on the modified sum. The method further includes encoding or decoding a syntax element of video data based on the determined rice parameter.

公开(公告)号：US20200382782A1

公开(公告)日：2020-12-03

申请号：US16996753

申请日：2020-08-18

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung CHIEN ,  Kai ZHANG ,  Yi-Wen CHEN ,  Marta KARCZEWICZ

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/42 ,  H04N19/70 ,  H04N19/157 ,  H04N19/103 ,  H04N19/174 ,  H04N19/186

Abstract: Provided are systems, methods, and computer-readable medium for encoding and decoding video data. In various examples, a coding device can include multiple luma QP and chroma QP relationship tables. In performing quantization or inverse quantization one video data being encoded or decoded, respectively, the coding device can select a table. The table can be selected based on, for example, a slice type, a prediction mode, and/or a luminance value, among other factors. The coding device can then use the luma QP value to look up a chroma QP value from the table. The luma QP and chroma QP values can then be used in quantization or inverse quantization.

公开(公告)号：US20200344473A1

公开(公告)日：2020-10-29

申请号：US16842343

申请日：2020-04-07

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Nan HU ,  Muhammed Zeyd COBAN ,  Marta KARCZEWICZ

IPC: H04N19/117 ,  H04N19/169

Abstract: Techniques are described for adaptation parameter sets (APS) for adaptive loop filter (ALF) parameters. One example involves obtaining an APS ID value and an APS type value associated with a NAL unit from a bitstream. A first APS associated with at least a portion of at least one picture is identified, with the first APS being uniquely identified by a combination of the APS type value and the APS identifier value, and the APS identifier value of the first APS is in a range based on the APS type value. The portion of the at least one picture is then reconstructed using an adaptive loop filter with parameters defined by the first APS uniquely identified by the APS type value and the APS identifier value.

公开(公告)号：US20200344469A1

公开(公告)日：2020-10-29

申请号：US16854720

申请日：2020-04-21

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd COBAN ,  Geert Van der Auwera ,  Marta KARCZEWICZ

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: Techniques are described for improving video coding. For example, a first block of a picture included in an encoded video bitstream can be obtained. A second block of the picture can be determined as being coded (e.g., encoded) using a type of block-based quantized residual domain pulse code modulation (BDPCM) mode, such as vertical BDPCM mode or horizontal BDPCM mode. In the event the second block is coded using the vertical BDPCM mode, a vertical intra-prediction mode can be determined for an intra-prediction mode list for the first block. The vertical intra-prediction mode can be added to the intra-prediction mode list for the first block. In the event the second block is coded using the horizontal BDPCM mode, a horizontal intra-prediction mode can be determined for the intra-prediction mode list for the first block and the horizontal intra-prediction mode can be added to the intra-prediction mode list.

公开(公告)号：US20200252608A1

公开(公告)日：2020-08-06

申请号：US16777732

申请日：2020-01-30

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Geert Van der Auwera ,  Luong PHAM VAN ,  Marta KARCZEWICZ

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/59 ,  H04N19/61 ,  H04N19/593

Abstract: Techniques are described for improving intra-subpartitioning (ISP) mode for splitting coding blocks into sub-blocks. In some cases, whether ISP mode is enabled for a coding block is based on size constraints pertaining to data units (e.g., VPDUs, transform blocks, among others). For instance, based on a size constraint related to a VPDU, the ISP mode can be disabled for coding blocks crossing VPDU boundaries. In some cases, whether to enable ISP mode may be based on comparison of the width and/or height of the coding block to size thresholds corresponding to one or more maximum transform block sizes. In some cases, where the ISP mode is enabled for a coding block, a value of a flag used for defining a type of split, horizontal or vertical, for the coding block, can be inferred based on the width and/or height of the coding block relative to one or more thresholds.

公开(公告)号：US20200221078A1

公开(公告)日：2020-07-09

申请号：US16725487

申请日：2019-12-23

Applicant: QUALCOMM Incorporated

Inventor： Vadim SEREGIN ,  Nan HU ,  Cheng-Teh HSIEH ,  Marta KARCZEWICZ

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/30 ,  H04N19/186 ,  H04N19/176

Abstract: Techniques are described herein for processing video data. For instance, a current block of a picture of the video data can be obtained, and it can be determined that the current block includes more than one virtual pipeline data unit (VPDU). Current neighbor samples for the current block, reference neighbor samples for the current block, and additional neighbor samples for the current block can be obtained for illumination compensation. One or more illumination compensation parameters can be determined for the current block using the current neighbor samples, the reference neighbor samples, and the additional neighbor samples. The additional neighbor samples are used for determining the one or more illumination compensation parameters based on the current block covering more than one VPDU. Illumination compensation can be performed for the current block using the one or more illumination compensation parameters.

公开(公告)号：US20190230361A1

公开(公告)日：2019-07-25

申请号：US16246952

申请日：2019-01-14

Applicant: QUALCOMM Incorporated

Inventor： Kai ZHANG ,  Wei-Jung CHIEN ,  Li ZHANG ,  Marta KARCZEWICZ

IPC: H04N19/139 ,  H04N19/513 ,  H04N19/176 ,  H04N19/109

CPC classification number: H04N19/139 ,  H04N19/109 ,  H04N19/176 ,  H04N19/42 ,  H04N19/52 ,  H04N19/521 ,  H04N19/527 ,  H04N19/537

Abstract: A device for video decoding a current block of video data, the device including one or more processors configured to compute a horizontal component of a motion vector and to compute a vertical component of a motion vector in an affine model. The affine model may be a four-parameter affine model which includes two control point motion vectors, or a six-parameter affine model which includes three control point motion vectors. The horizontal and vertical components may include differences between control point motion vectors based on first-bit shift operations and second bit-shift operations.

公开(公告)号：US20190222848A1

公开(公告)日：2019-07-18

申请号：US16249371

申请日：2019-01-16

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen CHEN ,  Wei-Jung CHIEN ,  Yu-Chen SUN ,  Li ZHANG ,  Hsiao-Chiang CHUANG ,  Marta KARCZEWICZ

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513 ,  H04N19/577

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/521 ,  H04N19/577

Abstract: Improved systems and methods related to decoder-side motion vector derivation (DMVD), for example, in applying one or more constraints to motion information, such as a MV derived by DMVD, and/or a MV difference between an initial MV and an MV derived by DMVD. These techniques may be applied to any of the existing video codecs, such as HEVC (High Efficiency Video Coding), and/or may be an efficient coding tool in any future video coding standards. In one example, the block size used for DMVD can be restricted. In another example, FRUC bilateral matching can be simplified by not searching outside reference blocks indicated by the original motion vector.

公开(公告)号：US20190007683A1

公开(公告)日：2019-01-03

申请号：US16020526

申请日：2018-06-27

Applicant: Qualcomm Incorporated

Inventor： Geert VAN DER AUWERA ,  Muhammed COBAN ,  Marta KARCZEWICZ

IPC: H04N19/124 ,  H04N19/122 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/172

Abstract: Provided are systems and methods for processing 360-degree video data by obtaining a 360-degree rectangular formatted projected picture, the 360-degree rectangular formatted projected picture including a first region with a region boundary and a first region area; identifying coding tree units (CTUs) within the first region area; selectively identifying a first coding unit (CU) and a second CU from within the CTUs; determining an initial QP value for the first CU; determining an initial QP value for the second CU; identifying the first CU as a region boundary CU; identifying the second CU as a non-region boundary CU; reducing the initial QP value for the first CU to a final first QP value in response to identifying the first CU as a region boundary CU, and generating an encoded video bitstream comprising: the final QP value for the first CU, and the initial QP value for the second CU.