公开(公告)号：US11265558B2

公开(公告)日：2022-03-01

申请号：US17099010

申请日：2020-11-16

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/00 ,  H04N19/186 ,  H04N19/176 ,  H04N19/117

Abstract: In some examples, a method of decoding video data may comprise reconstructing a block of video data comprising chroma samples, applying an adaptive loop filter to the chroma samples, and applying a cross-component adaptive loop filter to the chroma samples. Applying the cross-component adaptive loop filter may include determining an offset, and applying the offset to a particular chroma sample being filtered, wherein the offset is a function of a difference between a collocated luma sample that is collocated with the particular chroma sample being filtered and a plurality of neighboring luma samples that are spatial neighbors to the collocated luma sample.

公开(公告)号：US11245920B2

公开(公告)日：2022-02-08

申请号：US17000034

申请日：2020-08-21

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N11/02 ,  H04N19/52 ,  H04N19/176

Abstract: A device for coding video data is configured to code a motion vector difference (MVD) value using a codeword prefix and a codeword suffix. Based on an absolute value, minus 2, of the MVD value being 131070 or greater, the codeword prefix of the MVD value is equal to 1111 1111 1111 1111 and the codeword suffix is coded using the fixed length code.

公开(公告)号：US20220030232A1

公开(公告)日：2022-01-27

申请号：US17126671

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/70 ,  H04N19/103 ,  H04N19/136 ,  H04N19/176

Abstract: A video encoder may be configured to encode multiple adaptive loop filter sets in an adaptation parameter set associated with the video data. A video decoder may receive the multiple adaptive loop filter sets in the adaptation parameter set associated with video data, determine one or more adaptive loop filters from the multiple adaptive loop filter sets, and apply the determined one or more adaptive loop filters to the video data.

公开(公告)号：US20220030231A1

公开(公告)日：2022-01-27

申请号：US17122850

申请日：2020-12-15

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/117 ,  H04N19/86 ,  H04N19/80 ,  H04N19/96 ,  H04N19/46 ,  H04N19/157

Abstract: A video encoder may signal a set of values for one or more deblocking filter parameters at a high level parameter set. A video decoder may receive and decode the set of values. The video encoder may also encode an index to the set of values at a lower level. The video decoder may decode the index and then use the index to determine the particular value from the set of values to determine the deblocking filter parameter.

公开(公告)号：US11218694B2

公开(公告)日：2022-01-04

申请号：US16576677

申请日：2019-09-19

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Akshay Gadde ,  Hilmi Enes Egilmez ,  Marta Karczewicz ,  Amir Said

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/103 ,  H04N19/115 ,  H04N19/156

Abstract: Techniques are described for improving transform coding. For example, an encoded block of video data can be obtained, and a width and/or a height of the block can be determined. The width can be compared to a first threshold and/or the height can be compared to a second threshold. A horizontal transform and a vertical transform can be determined for the block based on comparing the width of the block to the first threshold and/or the height of the block to the second threshold. The horizontal transform and the vertical transform are determined without decoding a syntax element that indicates the horizontal transform and the vertical transform (e.g., the syntax element is not in an encoded video bitstream processed by a decoding device). In some cases, residual data is determined using the horizontal and vertical transforms, and a video block is determined using the residual data and a predictive block.

公开(公告)号：US20210409683A1

公开(公告)日：2021-12-30

申请号：US17356153

申请日：2021-06-23

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  H04N19/159

Abstract: An example device for decoding video data includes memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to reshape a pixel domain reference template block using a forward mapping function into a mapped domain reference template block and derive local illumination compensation (LIC) model parameters from the mapped domain reference template block and a mapped domain neighboring reconstruction template block. The one or more processors are configured to apply the LIC model parameters to motion-compensated prediction signals and decode the video data based on the application of the LIC model parameters.

公开(公告)号：US11206396B2

公开(公告)日：2021-12-21

申请号：US16735456

申请日：2020-01-06

Applicant: QUALCOMM Incorporated

Inventor： Vadim Seregin ,  Wei-Jung Chien ,  Hongtao Wang ,  Marta Karczewicz

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/132 ,  H04N19/70 ,  H04N19/176

Abstract: An example method of coding video data includes selecting, by one or more processors a sub-set of a plurality of neighboring samples of a current block in a current picture, wherein the plurality of neighboring samples includes a row of samples adjacent to a top row of the current block in the current picture and a column of samples adjacent to a left column of the current block in the current picture; deriving, by the one or more processors and based on the sub-set of the plurality of neighboring samples in the current picture, local illumination compensation (LIC) parameters for the current block; and performing, by the one or more processors and based on the LIC parameters, LIC on samples of the current block to generate compensated samples of the current block.

公开(公告)号：US11190793B2

公开(公告)日：2021-11-30

申请号：US16922356

申请日：2020-07-07

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/00 ,  H04N19/463 ,  H04N19/70 ,  H04N19/176

Abstract: A video decoder is configured to decode one or more first adaptation parameter set (APS) indices for a current picture that indicate one or more first APSs that may be used for decoding the current picture. The video decoder may determine, for a block of a sub-picture of the current picture, an APS from the one or more first APSs indicated for the current picture, and decode the block of the sub-picture using the determined APS. In some examples, the video decoder may determine, for the block of the sub-picture of the current picture, the APS from the one or more first APSs indicated for the current picture without decoding any syntax elements, at a sub-picture level, indicating APSs that may be used for decoding the sub-picture.

公开(公告)号：US20210368209A1

公开(公告)日：2021-11-25

申请号：US17325683

申请日：2021-05-20

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Vadim Seregin ,  Yong He ,  Yao-Jen Chang

IPC: H04N19/70 ,  H04N19/146 ,  H04N19/169 ,  H04N19/184

Abstract: A method of processing video data, the method comprising: decoding a syntax element in a profile tier level syntax structure in a bitstream that includes an encoded representation of the video data; and based on a value of the syntax element being equal to 0, inferring that all constraint fields in a general constraint information syntax structure have values indicating that constraints corresponding to the constraint fields do not apply to the bitstream.

公开(公告)号：US20210368192A1

公开(公告)日：2021-11-25

申请号：US17322510

申请日：2021-05-17

Applicant: QUALCOMM Incorporated

Inventor： Nan Hu ,  Vadim Seregin ,  Yong He ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/117 ,  H04N19/82 ,  H04N19/70 ,  H04N19/46 ,  H04N19/159 ,  H04N19/169 ,  H04N19/174

Abstract: An example device for decoding video data, the device including a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that adaptive loop filter (ALF) information can be present in a picture header of a picture of the video data and cannot be present in a slice header; in response to determining that the ALF information can be present in the picture header and cannot be present in the slice header, determine that a picture header syntax structure is not present in the slice header (e.g., without decoding data representing a value for a syntax element indicating whether the picture header syntax structure is present in the slice header); and decode the picture according to the determination that the picture header syntax structure is not present in the slice header.