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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：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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243.发明授权公开(公告)号：US10715833B2
公开(公告)日：2020-07-14
申请号：US14289082
申请日：2014-05-28
Applicant: Apple Inc.
Inventor： Yunfei Zheng , Dazhong Zhang , Xiaosong Zhou , Chris Y. Chung , Hsi-Jung Wu
IPC: H04N19/70
Abstract: An encoding system may include a video source that captures video image, a video coder, and a controller to manage operation of the system. The video coder may encode the video image into encoded video data using a plurality of subgroup parameters corresponding to a plurality of subgroups of pixels within a group. The controller may set the subgroup parameters for at least one of the subgroups of pixels in the video coder, based upon at least one parameters corresponding to the group. A decoding system may decode the video data based upon the motion prediction parameters.
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公开(公告)号：US20200213571A1
公开(公告)日：2020-07-02
申请号：US16725245
申请日：2019-12-23
Applicant: Apple Inc.
Inventor： Jae Hoon Kim , Ming Chen , Xiaosong Zhou , Hsi-Jung Wu , Dazhong Zhang , Hang Yuan , Jiefu Zhai , Chris Y. Chung
IPC: H04N13/161 , H04N13/243 , H04N5/232 , H04N19/70 , H04N19/597
Abstract: Frame packing techniques are disclosed for multi-directional images and video. According to an embodiment, a multi-directional source image is reformatted into a format in which image data from opposing fields of view are represented in respective regions of the packed image as flat image content. Image data from a multi-directional field of view of the source image between the opposing fields of view are represented in another region of the packed image as equirectangular image content. It is expected that use of the formatted frame will lead to coding efficiencies when the formatted image is processed by predictive video coding techniques and the like.
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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：US10574997B2
公开(公告)日：2020-02-25
申请号：US15796313
申请日：2017-10-27
Applicant: Apple Inc.
Inventor： Chris Y. Chung , Mei Guo , Hsi-Jung Wu , Jingteng Xue , Jun Xin
IPC: H04N19/176 , H04N19/117 , H04N19/147 , H04N19/82 , H04N19/105 , H04N19/196
Abstract: Systems and methods are disclosed for coding pixel blocks of an input frame in which coding costs of a plurality of candidate coding modes are estimated. A coding cost of a candidate coding mode may be estimated based on noise estimate associated with the candidate coding mode. A coding mode for the input pixel block may be selected based on a comparison of the estimated coding costs of the plurality of candidate coding modes. The input pixel block may then be coded according to the selected coding mode.
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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：US10432946B2
公开(公告)日：2019-10-01
申请号：US14964965
申请日：2015-12-10
Applicant: Apple Inc.
Inventor： Yeping Su , Chris Y. Chung , Hsi-Jung Wu , Xiaosong Zhou , Jiefu Zhai
IPC: H04N7/12 , H04N19/154 , H04N19/115 , H04N19/137 , H04N19/187 , H04N19/177 , H04N7/01 , H04N19/117 , H04N19/31 , H04N19/587 , H04N19/46 , H04N19/85
Abstract: Judder artifacts are remedied in video coding system by employing frame rate conversion at an encoder. A source video sequence may be coded as base layer coded video at a first frame rate. An encoder may identify a portion of the coded video sequence that likely will exhibit judder effects when decoded. For those portions that likely will exhibit judder effects, video data representing the portion of the source video may be coded at a higher frame rate than a frame rate of the coded base layer data as enhancement layer data. Moreover, an encoder may generate metadata representing “FRC hints”—techniques that a decoder should employ when performing decoder-side frame rate conversion. An encoding terminal may transmit the base layer coded video and either the enhancement layer coded video or the FRC hints to a decoder. Thus, encoder infrastructure may mitigate against judder artifacts that may arise during decoding.
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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：US20190005709A1
公开(公告)日：2019-01-03
申请号：US15638587
申请日：2017-06-30
Applicant: Apple Inc.
Inventor： Jae Hoon Kim , Dazhong Zhang , Hang Yuan , Hsi-Jung Wu , Jiefu Zhai , Ming Chen , Xiaosong Zhou
IPC: G06T15/20 , H04N13/02 , H04N5/232 , H04N19/117
Abstract: Techniques are disclosed for correcting artifacts in multi-view images that include a plurality of planar views. Image content the planar views may be projected from the planar representation to a spherical projection. Thereafter, a portion of the image content may be projected from the spherical projection to a planar representation. The image content of the planar representation may be used for display. Extensions are disclosed that correct artifacts that may arise during deblocking filtering of the multi-view images.
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