公开(公告)号：US20220345707A1

公开(公告)日：2022-10-27

申请号：US17857408

申请日：2022-07-05

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/126 ,  H04N19/61 ,  H04N19/186 ,  H04N19/12 ,  H04N19/189

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform receiving video data in an AOMedia Video 1 (AV1) format comprising data of at least two chroma prediction-residual signal blocks, a transformation between at least one signal block, having a size less than or equal to a combination of the chroma prediction-residual signal blocks, and the chroma prediction-residual signal blocks, and decoding the video data based on an output of the transformation comprising the at least one signal block having the size less than or equal to the combination of the chroma prediction-residual blocks.

公开(公告)号：US20220224883A1

公开(公告)日：2022-07-14

申请号：US17488027

申请日：2021-09-28

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/139 ,  H04N19/513 ,  H04N19/53

Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that decodes a video bitstream to obtain a reduced-resolution residual block for a current block. The processing circuitry determines that a block level flag is set to a pre-defined value. The pre-defined value indicates that the current block is coded in reduced-resolution coding. Based on the block level flag, the processing circuitry generates a reduced-resolution prediction block for the current block by down-sampling a full-resolution reference block of the current block. The processing circuitry generates a reduced-resolution reconstruction block for the current block based on the reduced-resolution prediction block and the reduced-resolution residual block. The processing circuitry generates a full-resolution reconstruction block for the current block by up-sampling the reduced-resolution reconstruction block.

公开(公告)号：US20220116635A1

公开(公告)日：2022-04-14

申请号：US17362048

申请日：2021-06-29

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Yixin DU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/44 ,  H04N19/117 ,  H04N19/82 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that determines directionality information of a restoration filter unit included in a video frame based on at least one of a constrained directional enhancement filter (CDEF) process or an intra prediction mode. The processing circuitry determines one of a plurality of sets of filter parameters of a restoration filter process based on the directionality information of the restoration filter unit. The processing circuitry performs the restoration filter process on the restoration filter unit based on the one of the plurality of sets of filter parameters. The processing circuitry reconstructs the video frame based on the filtered restoration filter unit.

公开(公告)号：US20220030211A1

公开(公告)日：2022-01-27

申请号：US17496035

申请日：2021-10-07

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N13/161 ,  H04N19/597 ,  H04N19/85 ,  H04N19/176 ,  G06T9/00

Abstract: A method of interframe point cloud attribute decoding of video data is performed by at least one processor and includes: obtaining a first reconstructed residual; obtaining a quantization index of a second reconstructed residual; obtaining the second reconstructed residual, based on the obtained quantization index of the second reconstructed residual and the obtained first reconstructed residual; and obtaining a color attribute of a point of a point cloud by decoding the obtained second reconstructed residual or decoding a transform residual based on the obtained second reconstructed residual. The first reconstructed residual and the second reconstructed residual are each a reconstructed residual of a respective channel of the color attribute.

公开(公告)号：US20210392335A1

公开(公告)日：2021-12-16

申请号：US17458809

申请日：2021-08-27

Applicant: TENCENT AMERICA LLC

Inventor： Birendra KATHARIYA ,  Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N19/132 ,  H04N19/103 ,  G06T9/40 ,  H04N19/124

Abstract: A method of adaptive point cloud attribute coding is performed by at least one processor and includes determining a centroid of k candidate points of a point cloud, k being a predetermined sampling rate of all points of the point cloud, and selecting one of the k candidate points that is closest to the centroid. The method further includes determining a first levels-of-detail (LoD) layer comprising the one of the k candidate points, and a second LoD layer without the one of the k candidate points, and performing coding of attributes of the all points, based on the first LoD layer and the second LoD layer.

公开(公告)号：US20210312667A1

公开(公告)日：2021-10-07

申请号：US17203155

申请日：2021-03-16

Applicant: Tencent America LLC

Inventor： Sehoon YEA ,  Wen GAO ,  Xiang ZHANG ,  Shan LIU

IPC: G06T9/00 ,  G06T17/00 ,  H04N19/96 ,  H04N19/103 ,  H04N19/184 ,  H04N19/167

Abstract: A method of point cloud geometry decoding in a point cloud decoder is provided. In the method, first signaling information is received from a coded bitstream for a point cloud that includes a set of points in a three-dimensional (3D) space. The first signaling information indicates partition information of the point cloud. Second signaling information is determined based on the first signaling information indicating a first value. The second signaling information is indicative of a partition mode of the set of points in the 3D space. Further, the partition mode of the set of points in the 3D space is determined based on the second signaling information. The point cloud is reconstructed subsequently based on the partition mode.

公开(公告)号：US20210217136A1

公开(公告)日：2021-07-15

申请号：US17110691

申请日：2020-12-03

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Stephan WENGER ,  Shan LIU

IPC: G06T3/40 ,  G06T9/40 ,  G06T17/00 ,  G06K9/62

Abstract: A method, apparatus, and computer-readable medium for point cloud coefficient coding are provided. Transform coefficients associated with point cloud data are decomposed into set-index values and symbol-index values, the symbol index-value specifying location of the transform coefficient within a set. The decomposed transform coefficients are partitioned into one or more sets based on the set-index values and the symbol-index values. The set-index values of the partitioned transform coefficients are entropy-coded, and the symbol-index values of the partitioned transform coefficients are bypass-coded. The point cloud data is compressed based on the entropy-coded symbol-index values and the bypass-coded set-index values.

公开(公告)号：US20200302654A1

公开(公告)日：2020-09-24

申请号：US16822198

申请日：2020-03-18

Applicant: TENCENT AMERICA LLC

Inventor： Shuai ZHAO ,  Iraj SODAGAR ,  Shan LIU ,  Byeongdoo CHOI ,  Sehoon YEA ,  Arash VOSOUGHI

IPC: G06T9/40 ,  H04N19/96 ,  G06T17/00 ,  H04N19/184

Abstract: A method of obtaining a tree-based point cloud compression (PCC) media stream using moving picture experts group (MPEG)-dynamic adaptive streaming over http (DASH), is performed by at least one processor and includes obtaining, from a server, a media representation description (MPD) comprising a PCC uniform resource indicator (URI) and a PCC three-dimensional (3D) descriptor, and determining whether the PCC URI comprised in the obtained MPD indicates that the tree-based PCC media stream is to be accessed. The method further includes, based on the PCC URI being determined to indicate that the tree-based PCC media stream is to be accessed, obtaining, from the server, the tree-based PCC media stream, using the PCC 3D descriptor comprised in the obtained MPD.