公开(公告)号：US12108036B2

公开(公告)日：2024-10-01

申请号：US17901715

申请日：2022-09-01

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Krishnakanth Rapaka ,  Dominik Mehlem

IPC: H04N19/117 ,  H04N19/126 ,  H04N19/13 ,  H04N19/182 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/126 ,  H04N19/182 ,  H04N19/13 ,  H04N19/82

Abstract: A system comprises an encoder configured to compress video data. The encoder includes an adaptive bilateral filter that uses look-up tables. The encoder may encode one or more adaptive adjustment factors to be used by a decoder to select or adjust look-up tables used to decode the compressed video data.

公开(公告)号：US11627314B2

公开(公告)日：2023-04-11

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 ,  H04N19/12 ,  H04N19/136 ,  H04N19/172 ,  H04N19/184 ,  H04N19/60 ,  H04N19/80

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：US12075093B2

公开(公告)日：2024-08-27

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 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/61 ,  G06T7/11 ,  G06T7/12

CPC classification number: H04N19/66 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/61 ,  G06T7/11 ,  G06T7/12

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：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：US11758133B2

公开(公告)日：2023-09-12

申请号：US16834611

申请日：2020-03-30

Applicant: Apple Inc.

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

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/543 ,  H04N19/176 ,  H04N19/573 ,  H04N19/139

CPC classification number: H04N19/119 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/543 ,  H04N19/573

Abstract: Techniques for coding and decoding video may include predicting picture regions defined by a time-varying tessellation and/or by a tessellation that varies spatially within a picture. These techniques improve decoded video quality, for example, by reducing block-based visual artifacts. Tessellation patterns may be irregular spatially to prevent alignment of some prediction region boundaries within a picture. Tessellation patterns may vary over time based on a spatial offset value, and the spatial offset value may be determined via a modulo function. Tessellation patterns may include overlapped shapes, for example when used in conjunction with overlapped block motion compensation.

公开(公告)号：US11438584B2

公开(公告)日：2022-09-06

申请号：US16994506

申请日：2020-08-14

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Krishnakanth Rapaka ,  Dominik Mehlem

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/124 ,  H04N19/159 ,  H04N19/105 ,  H04N19/126 ,  H04N19/182 ,  H04N19/13

Abstract: A system comprises an encoder configured to compress video data. The encoder includes an adaptive bilateral filter that uses look-up tables. The encoder may encode one or more adaptive adjustment factors to be used by a decoder to select or adjust look-up tables used to decode the compressed video data.

公开(公告)号：US20210051320A1

公开(公告)日：2021-02-18

申请号：US16994506

申请日：2020-08-14

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Krishnakanth Rapaka ,  Dominik Mehlem

IPC: H04N19/117 ,  H04N19/126 ,  H04N19/182

Abstract: A system comprises an encoder configured to compress video data. The encoder includes an adaptive bilateral filter that uses look-up tables. The encoder may encode one or more adaptive adjustment factors to be used by a decoder to select or adjust look-up tables used to decode the compressed video data.

公开(公告)号：US20220417509A1

公开(公告)日：2022-12-29

申请号：US17901715

申请日：2022-09-01

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Krishnakanth Rapaka ,  Dominik Mehlem

IPC: H04N19/117 ,  H04N19/126 ,  H04N19/182

Abstract: A system comprises an encoder configured to compress video data. The encoder includes an adaptive bilateral filter that uses look-up tables. The encoder may encode one or more adaptive adjustment factors to be used by a decoder to select or adjust look-up tables used to decode the compressed video data.

公开(公告)号：US11496770B2

公开(公告)日：2022-11-08

申请号：US17127921

申请日：2020-12-18

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 ,  G06T7/11 ,  G06T7/12

Abstract: A system includes 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：US20210195246A1

公开(公告)日：2021-06-24

申请号：US17127921

申请日：2020-12-18

Applicant: Apple Inc.

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

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

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 recreates a residual signal from the processed sub-error signals and uses the re-created residual signal to correct predicted values at the decoder.