公开(公告)号：US11451773B2

公开(公告)日：2022-09-20

申请号：US16427017

申请日：2019-05-30

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Akshay Gadde ,  Vadim Seregin ,  Wei-Jung Chien

IPC: H04N19/117 ,  H04N19/96 ,  H04N19/70 ,  H04N19/176

Abstract: A video encoder and video decoder may determine a set of adaptive loop filters, from among a plurality of sets of adaptive loop filters, on a per-block basis. Each set of adaptive loop filters may include filters from a previous picture, filters signaled for the current picture, and/or pre-trained filter. By varying the set of adaptive loop filters on a per-block basis, the adaptive loop filters available for each block of video data may be more adapted to local statistics of the video data.

公开(公告)号：US20190320172A1

公开(公告)日：2019-10-17

申请号：US16381958

申请日：2019-04-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  H04N19/189 ,  H04N19/70 ,  H04N19/169

Abstract: A video decoder configured to determine filter information for a region of a picture of video data; for a largest coding unit (LCU) of the region, determine a size for a current unit based on a location of the LCU within the picture, wherein the size for the current unit is different than a size of the LCU; and based on the determined filter information, determine a filter for the current unit of the region; and filter the current unit with the determined filter.

公开(公告)号：US11140418B2

公开(公告)日：2021-10-05

申请号：US16511957

申请日：2019-07-15

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Nan Hu ,  Vadim Seregin ,  Akshay Gadde

IPC: H04N19/70 ,  H04N19/82 ,  H04N19/117 ,  H04N19/186 ,  H04N19/174 ,  H04N19/176 ,  H04N19/13

Abstract: A video decoder can be configured to set each block-level syntax element of a plurality of block-level syntax elements to a value indicating that an adaptive loop filter is enabled for an associated component of the video data in response to determining that a slice-level syntax element is set to a value indicating that values for the plurality of block-level syntax elements are inferred.

公开(公告)号：US10972729B2

公开(公告)日：2021-04-06

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 ,  H04N19/14 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61 ,  H04N19/86

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：US20200029095A1

公开(公告)日：2020-01-23

申请号：US16511957

申请日：2019-07-15

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Nan Hu ,  Vadim Seregin ,  Akshay Gadde

IPC: H04N19/70 ,  H04N19/82 ,  H04N19/117 ,  H04N19/13 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174

Abstract: A video decoder can be configured to set each block-level syntax element of a plurality of block-level syntax elements to a value indicating that an adaptive loop filter is enabled for an associated component of the video data in response to determining that a slice-level syntax element is set to a value indicating that values for the plurality of block-level syntax elements are inferred.

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.