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公开(公告)号：US11924440B2
公开(公告)日：2024-03-05
申请号：US17894309
申请日：2022-08-24
Applicant: Apple Inc.
Inventor： Alexandros Michael Tourapis , Yeping Su , David Singer , Hsi-Jung Wu
IPC: H04N19/159 , H04N19/105 , H04N19/109 , H04N19/147 , H04N19/176 , H04N19/513 , H04N19/567 , H04N19/70
CPC classification number: H04N19/159 , H04N19/109 , H04N19/147 , H04N19/176 , H04N19/513 , H04N19/567 , H04N19/70
Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.
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公开(公告)号：US11882294B2
公开(公告)日：2024-01-23
申请号：US17894309
申请日：2022-08-24
Applicant: Apple Inc.
Inventor： Alexandros Michael Tourapis , Yeping Su , David Singer , Hsi-Jung Wu
IPC: H04N19/159 , H04N19/105 , H04N19/70 , H04N19/176 , H04N19/567 , H04N19/147 , H04N19/109 , H04N19/513
CPC classification number: H04N19/159 , H04N19/109 , H04N19/147 , H04N19/176 , H04N19/513 , H04N19/567 , H04N19/70
Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.
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公开(公告)号：US11683525B2
公开(公告)日：2023-06-20
申请号：US17523826
申请日：2021-11-10
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 , H04N19/85 , H04N19/463
CPC classification number: 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：US11676309B2
公开(公告)日：2023-06-13
申请号：US17466601
申请日：2021-09-03
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Khaled Mammou , Yeping Su , Fabrice A. Robinet , David W. Singer
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.
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公开(公告)号：US20230005188A1
公开(公告)日：2023-01-05
申请号：US17822651
申请日：2022-08-26
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Fabrice A. Robinet , Jungsun Kim , Khaled Mammou , Valery G. Valentin , Yeping Su
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. The encoder is also configured to determine quantized minimum depths and/or maximum depths patch images in the image frames, wherein depth information is signaled relative to the quantized minimum depth.
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Patent Agency Ranking
公开(公告)号：US11533494B2
公开(公告)日：2022-12-20
申请号：US17187439
申请日：2021-02-26
Applicant: Apple Inc.
Inventor： Khaled Mammou , Valery G. Valentin , Fabrice A. Robinet , Alexandros Tourapis , Yeping Su , Jungsun Kim
IPC: H04N19/20 , H04N19/597 , H04N19/46 , H04N19/174 , G06T7/11 , G06T7/246 , H04N19/176 , H04N19/86 , H04N19/70
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：US11508094B2
公开(公告)日：2022-11-22
申请号：US17163188
申请日：2021-01-29
Applicant: Apple Inc.
Inventor： Khaled Mammou , Valery G. Valentin , Fabrice A. Robinet , Alexandros Tourapis , Yeping Su , Jungsun Kim
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. In some embodiments, an encoder may be configured to further compress points omitted from the image based representation. Also, in some embodiments, a decoder may be configured to decode points compressed outside of an image based representation or in a separate image based representation.
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公开(公告)号：US11463707B2
公开(公告)日：2022-10-04
申请号：US16879007
申请日：2020-05-20
Applicant: Apple Inc.
Inventor： Alexandros Michael Tourapis , Yeping Su , David Singer , Hsi-Jung Wu
IPC: H04N19/159 , H04N19/105 , H04N19/70 , H04N19/176 , H04N19/567 , H04N19/147 , H04N19/109 , H04N19/513
Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.
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公开(公告)号：US20220103851A1
公开(公告)日：2022-03-31
申请号：US17493607
申请日：2021-10-04
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Yeping Su , David Singer , Hsi-Jung Wu
IPC: H04N19/50 , H04N19/184 , H04N19/167 , H04N19/436 , H04N19/186 , H04N19/132 , H04N19/124 , H04N19/13 , H04N19/15 , H04N19/30 , H04N19/42 , H04N19/48
Abstract: Video compression and decompression techniques are disclosed that provide improved bandwidth control for video compression and decompression systems. In particular, video coding and decoding techniques quantize input video in multiple dimensions. According to these techniques, pixel residuals may be generated from a comparison of an array of input data to an array of prediction data. The pixel residuals may be quantized in a first dimension. After the quantization, the quantized pixel residuals may be transformed to an array of transform coefficients. The transform coefficients may be quantized in a second dimension and entropy coded. Decoding techniques invert these processes. In still other embodiments, multiple quantizers may be provided upstream of the transform stage, either in parallel or in cascade, which provide greater flexibility to video coders to quantize data in different dimensions in an effort to balance the competing interest in compression efficiency and quality of reconstructed video.
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公开(公告)号：US11252441B2
公开(公告)日：2022-02-15
申请号：US17163204
申请日：2021-01-29
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet , Yeping Su , Khaled Mammou
IPC: H04N19/91 , H04N19/20 , H04N19/124 , G06T9/00 , H04N19/13
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. To compress the attribute information, multiple levels of detail are generated based on an ordering of the points according to a space filling curve and attribute values are predicted. The attribute values may be predicted simultaneously while points are being assigned to different levels of detail. A decoder follows a similar prediction process based on level of details. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud compressed using level of detail attribute compression. In some embodiments, attribute correction values may take into account an influence factor of respective points in a given level of detail on attributes in other levels of detail.
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