公开(公告)号：US20210211724A1

公开(公告)日：2021-07-08

申请号：US17145192

申请日：2021-01-08

Applicant: Apple Inc.

Inventor： Jungsun Kim ,  Khaled Mammou ,  Alexandros Tourapis

IPC: H04N19/597 ,  H04N19/46 ,  H04N19/30 ,  H04N19/124

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information for volumetric visual content and/or a decoder configured to decompress compressed attribute and/or spatial information for the volumetric visual content. The encoder is configured to convert a 3D representation of the visual volumetric content into a 2D image based representation. The encoder is further configured to scale the patch in 2D space independent of any scaling in 3D space. Auxiliary information is signaled for use in identifying 2D scaled or unscaled patches in an image frame, mapping the patches into 3D space, and adjusting for any scaling factors applied at the encoder.

公开(公告)号：US11017566B1

公开(公告)日：2021-05-25

申请号：US16459483

申请日：2019-07-01

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Khaled Mammou ,  Yeping Su ,  Jungsun Kim ,  Valery G. Valentin ,  David W. Singer ,  Fabrice A. Robinet ,  Hsi-Jung Wu

IPC: G06T9/00 ,  G06T3/40 ,  H03M7/30 ,  G06T17/20

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A processing/filtering element utilizes occupancy map information and/or auxiliary patch information to determine relationships between patches in image frames and adjusts encoding/decoding and/or filtering or pre/post-processing parameters based on the determined relationships.

公开(公告)号：US20210118190A1

公开(公告)日：2021-04-22

申请号：US17112532

申请日：2020-12-04

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Fabrice A. Robinet

IPC: G06T9/40 ,  G06T7/50 ,  G06T3/40 ,  H04N19/44 ,  H04N19/96 ,  H04N19/90 ,  H04N19/91 ,  H04N19/186 ,  G06T17/00 ,  H04N19/593

Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information for the point cloud. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values used to correct predicted attribute values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points and distances between a particular point for whom an attribute value is being predicted and the neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file.

公开(公告)号：US20210099701A1

公开(公告)日：2021-04-01

申请号：US17031792

申请日：2020-09-24

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Khaled Mammou ,  Dominik Mehlem

IPC: H04N19/117 ,  H04N19/60 ,  H04N19/80 ,  H04N19/136 ,  H04N19/12 ,  H04N19/172 ,  H04N19/184

Abstract: A system comprises an encoder configured to compress attribute and/or spatial information for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. In some embodiments, an encoder applies an attribute transfer function to attributes of an image based representation with out-of-loop smoothing such that a decoder may apply any smoothing filter supported by the decoder without being restricted to using a similar smoothing filter as the encoder.

公开(公告)号：US20210097723A1

公开(公告)日：2021-04-01

申请号：US17031787

申请日：2020-09-24

Applicant: Apple Inc.

Inventor： Jungsun Kim ,  Alexandros Tourapis ,  Khaled Mammou ,  Chao Cao ,  Marius Preda

IPC: G06T9/00 ,  G06T5/00 ,  G06T7/73 ,  H04N19/137 ,  H04N19/60 ,  H04N19/80 ,  H04N19/172

Abstract: A system comprises an encoder configured to compress attribute and/or spatial information for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. In some embodiments, an encoder generates time-consistent patches for multiple version of the point cloud at multiple moments in time and uses the time-consistent patches to generate image based representations of the point cloud at the multiple moments in time.

公开(公告)号：US20210012536A1

公开(公告)日：2021-01-14

申请号：US17032711

申请日：2020-09-25

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Yeping Su ,  David W. Singer ,  Alexandros Tourapis ,  Fabrice A. Robinet ,  Hsi-Jung Wu

IPC: G06T9/00 ,  G06T7/20 ,  G06T7/50 ,  H04N19/172

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. The encoder is configured project the point cloud on to patch planes to compress the point cloud, and supports multiple layered patch planes. For example, some point clouds may have a depth, and points at different depths may be assigned to different layered patch planes.

公开(公告)号：US10853973B2

公开(公告)日：2020-12-01

申请号：US16592711

申请日：2019-10-03

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Valery G. Valentin ,  Fabrice A. Robinet ,  Khaled Mammou ,  Jungsun Kim ,  Yeping Su

IPC: G06T9/00

Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. In order to improve computing efficiency and/or repeatability, fixed-point number representations are used when determining predicted attribute values and attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file using fixed-point number representations.

公开(公告)号：US10805646B2

公开(公告)日：2020-10-13

申请号：US16449171

申请日：2019-06-21

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Valery G. Valentin ,  Fabrice A. Robinet ,  Yeping Su ,  Khaled Mammou

IPC: H04N19/96 ,  H04N19/91 ,  G06T9/00 ,  H04N19/176

Abstract: An encoder is configured to compress point cloud geometry information using an octree geometric compression technique that utilizes a binary arithmetic encoder, a look-ahead table, a cache, and a context selection process, wherein encoding contexts are selected based, at least in part, on neighborhood configurations. In a similar manner, a decoder is configured to decode compressed point cloud geometry information utilizing a binary arithmetic encoder, a look-ahead table, a cache, and a context selection process.

公开(公告)号：US10699444B2

公开(公告)日：2020-06-30

申请号：US16198635

申请日：2018-11-21

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Yeping Su ,  David W. Singer ,  Alexandros Tourapis ,  Fabrice A. Robinet ,  Hsi-Jung Wu

IPC: G06T7/20 ,  G06T9/00 ,  G06T7/70 ,  G06T7/50

Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A block/sub-block organization scheme is used to encode blocks and sub-blocks of an occupancy map used in compressing the point cloud. Binary values are assigned to blocks/sub-blocks based on whether they contain patches projected on the point cloud. A traversal path is chosen that takes advantage of run-length encoding strategies to reduce a size of an encoded occupancy map. Also, auxiliary information is used to further improve occupancy map compression.

公开(公告)号：US10659816B2

公开(公告)日：2020-05-19

申请号：US16569433

申请日：2019-09-12

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Andrea Cremaschi ,  Alexandros Tourapis

IPC: H04N19/60 ,  H04N19/597 ,  H04N19/59 ,  H04N19/182 ,  H04N19/132 ,  G06T17/00 ,  H04N19/119 ,  H04N19/167

Abstract: A system comprises an encoder configured to compress a point cloud comprising a plurality of points each point comprising spatial information for the point. The encoder is configured to sub-sample the points and determine subdivision locations for the subsampled points. Also, the encoder is configured to determine, for respective subdivision location, if a point is to be included, not included, or relocated relative to the subdivision location. The encoder encodes spatial information for the sub-sampled points and encodes subdivision location point inclusion/relocation information to generate a compressed point cloud. A decoder recreates an original or near replica of an original point cloud based on the spatial information and the subdivision location inclusion/relocation information included in the compressed point cloud.