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公开(公告)号：US10789733B2
公开(公告)日：2020-09-29
申请号：US16198634
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
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.
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公开(公告)号：US20200288127A1
公开(公告)日：2020-09-10
申请号：US16880084
申请日：2020-05-21
Applicant: Apple Inc.
Inventor： Alexandros Tourapis
IPC: H04N19/117 , H04N19/136 , H04N19/186 , H04N19/86 , H04N19/82 , H04N19/44 , H04N19/463 , H04N19/70
Abstract: Offset values, such as Sample Adaptive Offset (SAO) values in video coding standards such as the High Efficiency Video Coding standard (HEVC), may be improved by performing calculations and operations that improve the preciseness of these values without materially affecting the signal overhead needed to transmit the more precise values. Such calculations and operations may include applying a quantization factor to a video sample and at least some of its neighbors, comparing the quantized values, and classifying the video sample as a minimum, maximum, or one of various types of edges based on the comparison. Other sample range, offset mode, and/or offset precision parameters may be calculated and transmitted with metadata to improve the precision of offset values.
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公开(公告)号：US20200273208A1
公开(公告)日：2020-08-27
申请号：US15931349
申请日：2020-05-13
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , David W. Singer , Alexandros Tourapis , Fabrice A. Robinet , Hsi-Jung Wu
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.
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94.发明申请公开(公告)号：US20200219290A1
公开(公告)日：2020-07-09
申请号：US16736765
申请日：2020-01-07
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Jungsun Kim , Khaled Mammou
IPC: G06T9/00 , H04N19/597
Abstract: A system comprises an encoder configured to compress attribute information 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. The encoder is configured to convert a point cloud into an image based representation. The encoder packs patch images into an image frame and fills empty spaces in the image frame with a padding. Auxiliary information is signaled for use in identifying patches in an image frame. The auxiliary information may be signaled using a syntax that includes a header portion and data portion, which may enable temporal prediction and timing information to be signaled.
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公开(公告)号：US10607373B2
公开(公告)日：2020-03-31
申请号：US16198630
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
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 closed-loop color conversion process is used to improve compression while taking into consideration distortion introduced throughout the point cloud compression process.
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Patent Agency Ranking
公开(公告)号：US20200014953A1
公开(公告)日：2020-01-09
申请号：US16503933
申请日：2019-07-05
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , Jungsun Kim , Valery G. Valentin , David W. Singer , Fabrice A. Robinet , Hsi-Jung Wu , Alexandros Tourapis
IPC: H04N19/597 , H04N19/463 , H04N19/85
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 performs downscaling of an image frame prior to video encoding and a decoder performs upscaling of an image frame subsequent to video decoding.
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公开(公告)号：US20190313110A1
公开(公告)日：2019-10-10
申请号：US16380922
申请日：2019-04-10
Applicant: Apple Inc.
Inventor： Khaled Mammou , Valery G. Valentin , Fabrice A. Robinet , Alexandros Tourapis , Yeping Su , Jungsun Kim
IPC: H04N19/20 , H04N19/597 , H04N19/176 , H04N19/70 , H04N19/46 , H04N19/86 , H04N19/91
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 generates an occupancy map and may also encode the occupancy map as an image based representation. In some embodiments, a video encoder encodes image based representations of spatial information for the points of the point cloud, image based representations of attribute values for points of the point cloud, and an image based representation of an occupancy map for the spatial and attribute images.
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公开(公告)号：US20190311502A1
公开(公告)日：2019-10-10
申请号：US16380931
申请日：2019-04-10
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet
IPC: G06T9/00 , G06F16/901 , G06T17/00
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. A point cloud attribute transfer algorithm may be used to determine distortion between an original point cloud and a reconstructed point cloud. Additionally, the point cloud attribute transfer algorithm may be used to select attribute values for a reconstructed point cloud such that distortion between an original point cloud and a reconstructed version of the original point cloud is minimized.
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公开(公告)号：US20190156518A1
公开(公告)日：2019-05-23
申请号：US16198630
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
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 closed-loop color conversion process is used to improve compression while taking into consideration distortion introduced throughout the point cloud compression process.
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公开(公告)号：US20170347097A1
公开(公告)日：2017-11-30
申请号：US15680118
申请日：2017-08-17
Applicant: Apple Inc.
Inventor： Alexandros Tourapis
IPC: H04N19/12 , H04N19/186 , H04N19/136 , H04N19/17 , H04N19/70 , H04N19/625
CPC classification number: H04N19/12 , H04N19/136 , H04N19/17 , H04N19/186 , H04N19/625 , H04N19/70
Abstract: An encoder system may include an analyzer that analyzes a current image area in an input video to select a transform. A selectable residue transformer, controlled by the analyzer, may perform the selectable transform on a residue image generated from the current image area and a predicted current image area, to generate a transformed residue image. An encoder may encode the transformed residue image to generate output data. The analyzer controls the encoder to encode information to identify the selectable transform and to indicate that the selectable transform for the current image area is different from a transform of a previous image area of the input video. A decoder system may include components appropriate for decoding the output data from the encoder system.
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