公开(公告)号：US20210306634A1

公开(公告)日：2021-09-30

申请号：US17083662

申请日：2020-10-29

Applicant: Tencent America LLC

Inventor： Sehoon YEA ,  Xin Zhao ,  Shan Liu

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

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：US20200280710A1

公开(公告)日：2020-09-03

申请号：US16803619

申请日：2020-02-27

Applicant: Tencent America LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N13/161 ,  H04N19/54

Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. In some embodiments, the processing circuitry decodes prediction information of a point cloud from a coded bitstream and reconstructs a geometry reconstructed cloud according to a geometry image of the point cloud that is decoded from the coded bitstream. Further, the processing circuitry applies a filter to at least a geometry sample inside a patch of the geometry reconstructed cloud in addition to boundary samples of the patch to generate a smoothed geometry reconstructed cloud, and reconstructs points of the point cloud based on the smoothed geometry reconstructed cloud.

公开(公告)号：US20200279406A1

公开(公告)日：2020-09-03

申请号：US16803600

申请日：2020-02-27

Applicant: Tencent America LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: G06T9/40 ,  G06T7/194

Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. For example, the processing circuitry in the apparatus for point cloud encoding receives an occupancy map for a point cloud. The occupancy map is indicative of a background portion and a foreground portion for a coding block in an image that is generated based on the point cloud. Then, the processing circuitry devaluates distortions in the background portion of the coding block during an optimization process that results a coding option for the coding block, and encodes the coding block according to the coding option.

公开(公告)号：US20200279404A1

公开(公告)日：2020-09-03

申请号：US16803632

申请日：2020-02-27

Applicant: Tencent America LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: G06T9/00

Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. For example, the processing circuitry of the apparatus for point cloud encoding determines, from a point cloud, more than two candidate source points that are associated with a target point in a reconstructed geometry reconstructed from a compressed geometry image for the point cloud. Then the processing circuitry determines a color for the target point based on colors of the more than two candidate source points, and encodes texture of the point cloud with the target point having the determined color.

公开(公告)号：US20200221137A1

公开(公告)日：2020-07-09

申请号：US16732498

申请日：2020-01-02

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/90 ,  H04N19/86 ,  H04N19/176

Abstract: A method and apparatus for encoding a video stream using video point cloud coding, the decoding including obtaining an input point cloud; dividing the input point cloud into a plurality of chunks, including a first chunk including a first plurality of points and a second chunk including a second plurality of points; generating a first plurality of patches based on the first plurality of points; generating a second plurality of patches based on the second plurality of points; packing the first plurality of patches and the second plurality of patches into an image; and generating the video stream based on the image.

公开(公告)号：US20200184604A1

公开(公告)日：2020-06-11

申请号：US16567797

申请日：2019-09-11

Applicant: Tencent America LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: G06T5/00 ,  H04N19/59 ,  H04N19/182 ,  G06T5/30

Abstract: A method of video decoding performed in a video decoder includes receiving compressed geometric data corresponding to a three dimensional (3D) space. The method further includes receiving a low resolution occupancy map associated with the data cloud. The method further includes converting the low resolution occupancy map to a high resolution occupancy map. The method further includes reconstructing a point cloud using the compressed geometric data and the high resolution occupancy map. The method further includes performing a smoothing operation on one of the (i) reconstructed point cloud and (ii) the high resolution occupancy map.

公开(公告)号：US20230015039A1

公开(公告)日：2023-01-19

申请号：US17946706

申请日：2022-09-16

Applicant: Tencent America LLC

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

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

Abstract: A method of point cloud geometry decoding including receiving, from a coded bitstream for a point cloud that includes a set of points in a three-dimensional (3D) space, first signaling information being indicative of partition information of the point cloud, and receiving second signaling information that indicates whether the 3D space is an asymmetric cuboid. The method further includes determining dimensions of the 3D space that are signaled along x, y, and z directions based on the second signaling information indicating that the 3D space is the asymmetric cuboid. The method further includes, in response to the first signaling information indicating that the 3D space is the asymmetric cuboid, partitioning the 3D space based on the determined dimensions of the 3D space and based on the partition information indicated by the first signaling information, and reconstructing, by the processing circuitry, the point cloud based on the partitioned 3D space.

公开(公告)号：US20220201307A1

公开(公告)日：2022-06-23

申请号：US17482018

申请日：2021-09-22

Applicant: Tencent America LLC

Inventor： Sehoon YEA ,  Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/33 ,  H04N19/60 ,  H04N19/176

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding and decoding. Processing circuitry of an apparatus for video decoding decodes coded information for one or more blocks from a coded video bitstream. The coded information indicates whether to apply a super resolution coding mode to the one or more blocks. The super resolution coding mode is applied in response to the one or more blocks having been down sampled from a high spatial resolution to a low spatial resolution lower than the high spatial resolution by an encoder. Based on the coded information indicating that the super resolution coding mode is applied to the one or more blocks, the processing circuitry can generate, using the super resolution coding mode, a reconstructed block having the high spatial resolution by upsampling information of a first block having the low spatial resolution in the one or more blocks including transform coefficients.

公开(公告)号：US20220148132A1

公开(公告)日：2022-05-12

申请号：US17585826

申请日：2022-01-27

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Stephan Wenger ,  Shan Liu

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

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：US20210217137A1

公开(公告)日：2021-07-15

申请号：US17136122

申请日：2020-12-29

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Stephan WENGER ,  Shan LIU ,  Wen GAO

IPC: G06T3/40 ,  G06T9/00 ,  G06F16/901

Abstract: A method, computer system, and computer-readable medium are provided for point cloud attribute coding by at least one processor. Data associated with a point cloud is received. The received data is transformed through a lifting decomposition based on enabling a scalable coding of attributes associated with the lifting decomposition. The point cloud is reconstructed based on the transformed data.