公开(公告)号：US20230401751A1

公开(公告)日：2023-12-14

申请号：US18452345

申请日：2023-08-18

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Alexandros Tourapis ,  Jungsun Kim

IPC: G06T9/00 ,  G06T3/40 ,  G06T5/00 ,  H04N19/20 ,  H04N19/597 ,  H04N19/80 ,  H04N19/172 ,  G06T17/20

CPC classification number: G06T9/00 ,  G06T3/4038 ,  G06T3/4007 ,  G06T5/002 ,  H04N19/20 ,  H04N19/597 ,  H04N19/80 ,  H04N19/172 ,  G06T17/20 ,  G06T2207/20024

Abstract: A system comprises an encoder configured to compress and encode data for a three-dimensional mesh using a video encoding technique. To compress the three-dimensional mesh, the encoder determines sub-meshes and for each sub-mesh: texture patches and geometry patches. Also the encoder determines patch connectivity information and patch texture coordinates for the texture patches and geometry patches. The texture patches and geometry patches are packed into video image frames and encoded using a video codec. Additionally, the encoder determines boundary stitching information for the sub-meshes. A decoder receives a bit stream as generated by the encoder and reconstructs the three-dimensional mesh.

公开(公告)号：US20230370598A1

公开(公告)日：2023-11-16

申请号：US18136977

申请日：2023-04-20

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

IPC: H04N19/124 ,  H04N19/30 ,  H04N19/70 ,  H04N19/126 ,  H04N19/186 ,  H04N19/157 ,  H04N19/86 ,  H04N19/136 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61

CPC classification number: H04N19/124 ,  H04N19/30 ,  H04N19/70 ,  H04N19/126 ,  H04N19/186 ,  H04N19/157 ,  H04N19/86 ,  H04N19/136 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61 ,  H04N19/96

Abstract: A method of signaling additional chroma QP offset values that are specific to quantization groups is provided, in which each quantization group explicitly specifies its own set of chroma QP offset values. Alternatively, a table of possible sets of chroma QP offset values is specified in the header area of the picture, and each quantization group uses an index to select an entry from the table for determining its own set of chroma QP offset values. The quantization group specific chroma QP offset values are then used to determine the chroma QP values for blocks within the quantization group in addition to chroma QP offset values already specified for higher levels of the video coding hierarchy.

公开(公告)号：US20230319310A1

公开(公告)日：2023-10-05

申请号：US18328954

申请日：2023-06-05

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Jungsun Kim ,  Khaled Mammou ,  David W. Singer ,  Fabrice A. Robinet

IPC: H04N19/597 ,  H04N19/467 ,  H04N21/81 ,  H04N19/20 ,  G06T7/10

CPC classification number: H04N19/597 ,  H04N19/467 ,  H04N21/8193 ,  H04N19/20 ,  G06T7/10

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. Additionally, an encoder is configured to signal and/or a decoder is configured to receive a supplementary message comprising volumetric tiling information that maps portions of 2D image representations to objects in the point. In some embodiments, characteristics of the object may additionally be signaled using the supplementary message or additional supplementary messages.

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.

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

IPC: G06T9/00 ,  G06T3/00

CPC classification number: G06T9/00 ,  G06T3/005 ,  G06T9/001

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.

公开(公告)号：US20230009225A1

公开(公告)日：2023-01-12

申请号：US17951792

申请日：2022-09-23

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Hye-Yeon Cheong ,  David William Singer ,  Dominik Mehlem

IPC: H04N19/66 ,  H04N19/61 ,  H04N19/176 ,  H04N19/19 ,  H04N19/147

Abstract: A system comprises an encoder configured to compress media objects using a compression loop that includes a residual decomposition component that decomposes a residual signal for a block of the media object being compressed into multiple sub-error signals. The encoder is further configured to enable different transformation and/or quantization processes to be specified to be applied to different ones of the sub-errors. A corresponding decoder is configured to apply inverse transformation/quantization processing to the sub-error signals, based on the transformation/quantization processes that were applied at the encoder. The decoder then re-creates a residual signal from the processed sub-error signals and uses the re-created residual signal to correct predicted values at the decoder.

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.

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.

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

IPC: G06T9/00 ,  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. 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.

公开(公告)号：US20220248045A1

公开(公告)日：2022-08-04

申请号：US17723788

申请日：2022-04-19

Applicant: Apple Inc.

Inventor： Krishnakanth Rapaka ,  Alexandros Tourapis ,  David W. Singer

IPC: H04N19/503 ,  H04N19/86 ,  H04N19/82

Abstract: Predictive coding techniques may include resampling of reference pictures, where various coding parameters are determined based on the resolution(s) or pixel format(s) of the prediction references. In a first aspect, lists of weights for use in weighted prediction are based on the resolution(s) of prediction references. In a second aspect, resampling filter parameters are selected based on the resolutions of prediction references. In a third aspect, deblocking filter parameters are based on the resolution(s) of prediction references.