公开(公告)号：US20200186807A1

公开(公告)日：2020-06-11

申请号：US16705016

申请日：2019-12-05

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Wei-Jung Chien ,  Han Huang ,  Marta Karczewicz

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/119 ,  H04N19/423 ,  H04N19/176

Abstract: A video coder can be configured to code video data by determining a first block size threshold for a block of video data; determining a second block size threshold, wherein the second block size threshold is smaller than the first block size threshold; partitioning the block of video data into smaller sub-blocks; in response to determining that a first partition of the partitioned block is smaller or equal to the first block size threshold, determining that blocks within the partition belong to a parallel estimation area; and in response to determining that a second partition of the partitioned block is smaller or equal to the second block size threshold, determining that blocks within the second partition belong to an area for a shared candidate list.

公开(公告)号：US20200186794A1

公开(公告)日：2020-06-11

申请号：US16705174

申请日：2019-12-05

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Dmytro Rusanovskyy ,  Yu Han ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: Embodiments include systems and methods of generating merge candidates for an inter-prediction mode of a video block. In particular, embodiments include methods of generating spatial-temporal motion vector predictor candidates. Embodiments may include video encoders and video decoders.

公开(公告)号：US10681370B2

公开(公告)日：2020-06-09

申请号：US15857379

申请日：2017-12-28

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/51 ,  H04N19/513 ,  G06K9/48 ,  H04N19/52

Abstract: Techniques are described to unify the motion vectors of sub-blocks of an affine block and the motion vector information that is stored and used as predictors for determining motion vectors for subsequent blocks. A video coder may determine that the motion vector for a sub-block is the same as the motion vector information that is used to determine motion vectors for subsequent blocks.

公开(公告)号：US10609423B2

公开(公告)日：2020-03-31

申请号：US15697134

申请日：2017-09-06

Applicant: QUALCOMM Incorporated

Inventor： Hsiao-Chiang Chuang ,  Xiang Li ,  Jianle Chen ,  Feng Zou ,  Wei-Jung Chien ,  Yi-Wen Chen ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/463 ,  H04N19/134 ,  H04N19/176 ,  H04N19/593

Abstract: An example device includes a memory to store the video data, and processing circuitry in communication with the memory. The processing circuitry is configured to compare a value of a dimension of a current block of the stored video data to a value of a corresponding dimension of a neighboring block of the current block to obtain a relative dimension value. The processing circuitry is further configured to determine, based on the relative dimension value, that the current block is to be partitioned according to a prediction tree (PT) portion of a multi-type tree-based partitioning scheme. The PT portion comprises partitioning according to one of a binary tree structure or a center-side triple tree structure. The processing circuitry is further configured to partition, based on the determination, the current block according to the PT portion, to form a plurality of sub-blocks.

公开(公告)号：US10574993B2

公开(公告)日：2020-02-25

申请号：US15166153

申请日：2016-05-26

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/13 ,  H04N19/174 ,  H04N19/124 ,  H04N19/136 ,  H04N19/122 ,  H04N19/176 ,  H04N19/625 ,  H04N19/126 ,  H04N19/159 ,  H04N19/577 ,  H04N19/91 ,  H04N19/17 ,  H04N19/436 ,  H04N19/172 ,  H04N19/157 ,  H04N19/184

Abstract: A video coding device includes processor(s) configured to determine, for each of a plurality of bins of a value for a syntax element of a current transform coefficient, contexts using respective corresponding bins of values for the syntax element of previously coded transform coefficients. The processor(s) are configured to determine a context for an ith bin of the value for the syntax element of the current transform coefficient using a corresponding ith bin of a value for the syntax element of a previously coded transform coefficient. To use the corresponding ith bin of the value for the syntax element of the previously coded transform coefficient, the processor(s) are configured to use only the ith bin, and no other bins, of the value for the syntax element of the previously coded transform coefficient. ‘i’ represents a non-negative integer.

公开(公告)号：US20200059658A1

公开(公告)日：2020-02-20

申请号：US16540893

申请日：2019-08-14

Applicant: QUALCOMM Incorporated

Inventor： Wei-Jung Chien ,  Chun-Chi Chen ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/137 ,  H04N19/176

Abstract: Techniques are described for history-based candidate list operations in video coding for determining motion information for a current block. In one example, a device for decoding video data includes a memory configured to store a history-based candidate list and a video decoder. The video decoder is configured to construct the history-based candidate list by storing, in the memory, motion information of reconstructed blocks into the history-based candidate list as candidates of the history-based candidate list, identify a subset of candidates of the history-based candidate list, generate a candidate list based on the identified subset of candidates of the history-based candidate list, and reconstruct a current block based on the generated candidate list.

公开(公告)号：US20200045310A1

公开(公告)日：2020-02-06

申请号：US16601486

申请日：2019-10-14

Applicant: QUALCOMM Incorporated

Inventor： Yi-Wen CHEN ,  Wei-Jung Chien ,  Li Zhang ,  Yu-Chen Sun ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/537 ,  H04N19/52 ,  H04N19/139 ,  H04N19/176

Abstract: A video decoder selects a source affine block. The source affine block is an affine-coded block that spatially neighbors a current block. Additionally, the video decoder extrapolates motion vectors of control points of the source affine block to determine motion vector predictors for control points of the current block. The video decoder inserts, into an affine motion vector predictor (MVP) set candidate list, an affine MVP set that includes the motion vector predictors for the control points of the current block. The video decoder also determines, based on an index signaled in a bitstream, a selected affine MVP set in the affine MVP set candidate list. The video decoder obtains, from the bitstream, motion vector differences (MVDs) that indicate differences between motion vectors of the control points of the current block and motion vector predictors in the selected affine MVP set.

公开(公告)号：US10555006B2

公开(公告)日：2020-02-04

申请号：US15851219

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/82 ,  H04N19/13 ,  H04N19/176

Abstract: A device for decoding video data determines mode information for a current block of a current picture of the video data; derives weights for use in a bilateral filter based on the mode information for the current block; applies the bilateral filter to a current sample of the current block by assign the weights to neighboring samples of the current sample of the current block and the current sample of the current block and modifying a sample value for the current sample based on sample values of the neighboring samples, the weights assigned to the neighboring samples, the sample value for the current sample, and the weight assigned to the current sample; and based on the modified sample value for the current sample, outputs a decoded version of the current picture.

公开(公告)号：US20200021839A1

公开(公告)日：2020-01-16

申请号：US16506720

申请日：2019-07-09

Applicant: QUALCOMM Incorporated

Inventor： Luong Pham Van ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz ,  Han Huang

IPC: H04N19/52 ,  H04N19/513 ,  H04N19/615 ,  H04N19/15

Abstract: An example device for coding video data includes a memory configured to store video data; and one or more processing units implemented in circuitry and configured to: store motion information for a first coding tree unit (CTU) line of a picture in a first history motion vector predictor (MVP) buffer of the memory; reset a second history MVP buffer of the memory; and after resetting the second history MVP buffer, store motion information for a second CTU line of the picture in the second history MVP buffer, the second CTU line being different than the first CTU line. Separate threads of a video coding process executed by the one or more processors may process respective CTU lines, in some examples.

公开(公告)号：US10523964B2

公开(公告)日：2019-12-31

申请号：US15919060

申请日：2018-03-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/543 ,  H04N19/517 ,  H04N19/61 ,  H04N19/107 ,  H04N19/20 ,  H04N19/30 ,  H04N19/577 ,  H04N19/70 ,  H04N5/14

Abstract: A video decoder can be configured to determine that a block of video data is encoded using a bi-directional inter prediction mode; determine that the block of video data is encoded using a bi-directional optical flow (BIO) process; inter predict the block of video data according to the bi-directional inter prediction mode; perform the BIO process for the block, wherein performing the BIO process for the block comprises determining a single motion vector refinement for a group of pixels in the block, wherein the group of pixels comprises at least two pixels; refine the group of pixels based on the single motion vector refinement; and output a BIO refined predictive block of video data comprising the refined group of pixels.