公开(公告)号：US20230403396A1

公开(公告)日：2023-12-14

申请号：US18239644

申请日：2023-08-29

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

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

CPC classification number: H04N19/124 ,  H04N19/61 ,  H04N19/157 ,  H04N19/30 ,  H04N19/159 ,  H04N19/136 ,  H04N19/13 ,  H04N19/15 ,  H04N19/70 ,  H04N19/126 ,  H04N19/186 ,  H04N19/51 ,  H04N19/86 ,  H04N19/172

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：US11727619B2

公开(公告)日：2023-08-15

申请号：US17352080

申请日：2021-06-18

Applicant: Apple Inc.

Inventor： Arthur Y Zhang ,  Ray L. Chang ,  Timothy R. Oriol ,  Ling Su ,  Gurjeet S. Saund ,  Guy Cote ,  Jim C. Chou ,  Hao Pan ,  Tobias Eble ,  Avi Bar-Zeev ,  Sheng Zhang ,  Justin A. Hensley ,  Geoffrey Stahl

IPC: G06T15/00 ,  H04W76/10 ,  G06F3/01 ,  G06T3/00 ,  G06T9/00 ,  H04W88/08

CPC classification number: G06T15/005 ,  G06F3/012 ,  G06T3/0093 ,  G06T9/00 ,  H04W76/10 ,  H04W88/08

Abstract: A mixed reality system that includes a device and a base station that communicate via a wireless connection The device may include sensors that collect information about the user's environment and about the user. The information collected by the sensors may be transmitted to the base station via the wireless connection. The base station renders frames or slices based at least in part on the sensor information received from the device, encodes the frames or slices, and transmits the compressed frames or slices to the device for decoding and display. The base station may provide more computing power than conventional stand-alone systems, and the wireless connection does not tether the device to the base station as in conventional tethered systems. The system may implement methods and apparatus to maintain a target frame rate through the wireless link and to minimize latency in frame rendering, transmittal, and display.

公开(公告)号：US20210235093A1

公开(公告)日：2021-07-29

申请号：US17233099

申请日：2021-04-16

Applicant: Apple Inc.

Inventor： Haitao Guo ,  Hao Pan ,  Guy Cote ,  Andrew Bai

IPC: H04N19/14 ,  G06F3/14 ,  G09G5/02 ,  G09G5/10 ,  H04N1/64 ,  H04N5/20 ,  H04N5/235 ,  H04N19/172 ,  H04N19/102 ,  H04N19/137 ,  H04N19/177 ,  H04N19/124 ,  H04N19/154 ,  H04N19/17 ,  H04N19/98 ,  H04N21/422 ,  H04N21/431 ,  G06T5/00 ,  G09G3/20 ,  G09G5/00 ,  H04N1/60 ,  H04N5/50 ,  H04N9/64 ,  H04N9/67 ,  H04N19/136 ,  H04N19/184 ,  H04N19/186 ,  H04N19/169 ,  H04N19/44 ,  H04N19/30 ,  H04N19/33 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52

Abstract: Video processing techniques and pipelines that support capture, distribution, and display of high dynamic range (HDR) image data to both HDR-enabled display devices and display devices that do not support HDR imaging. A sensor pipeline may generate standard dynamic range (SDR) data from HDR data captured by a sensor using tone mapping, for example local tone mapping. Information used to generate the SDR data may be provided to a display pipeline as metadata with the generated SDR data. If a target display does not support HDR imaging, the SDR data may be directly rendered by the display pipeline. If the target display does support HDR imaging, then an inverse mapping technique may be applied to the SDR data according to the metadata to render HDR data for display. Information used in performing color gamut mapping may also be provided in the metadata and used to recover clipped colors for display.

公开(公告)号：US10789902B2

公开(公告)日：2020-09-29

申请号：US16113132

申请日：2018-08-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

公开(公告)号：US10706817B2

公开(公告)日：2020-07-07

申请号：US16146910

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Yingying Tang ,  Chaohao Wang ,  Sheng Zhang ,  Yunhui Hou ,  Paolo Sacchetto ,  Koorosh Aflatooni ,  Gokhan Avkarogullari ,  Guy Cote ,  Mahesh B. Chappalli ,  Peter F. Holland

IPC: G09G5/10 ,  G09G3/20 ,  G09G3/3225 ,  G09G3/36 ,  G09G3/3208

Abstract: An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

公开(公告)号：US10699622B2

公开(公告)日：2020-06-30

申请号：US15874799

申请日：2018-01-18

Applicant: Apple Inc.

Inventor： Ross Thompson ,  Guy Cote ,  Christopher P. Tann ,  Jerrold V. Hauck ,  Ian C. Hendry ,  Vanessa C. Heppolette ,  Adam J. Machalek ,  Alan M. Dunn ,  Ali Sazegari ,  Lars M. Lindberg ,  Arthur L. Spence

IPC: G09G3/20 ,  G09G3/00 ,  G06F9/451 ,  G09G3/32 ,  G06F3/06 ,  G09G3/3208 ,  G06F9/4401

Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.

公开(公告)号：US10657874B2

公开(公告)日：2020-05-19

申请号：US15967892

申请日：2018-05-01

Applicant: Apple Inc.

Inventor： Yingying Tang ,  Chaohao Wang ,  Sheng Zhang ,  Yunhui Hou ,  Paolo Sacchetto ,  Koorosh Aflatooni ,  Gokhan Avkarogullari ,  Guy Cote ,  Mahesh B. Chappalli ,  Peter F. Holland

IPC: G09G3/20 ,  G09G5/06 ,  G09G3/36 ,  G09G3/3208

Abstract: An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

公开(公告)号：US10453375B2

公开(公告)日：2019-10-22

申请号：US15874791

申请日：2018-01-18

Applicant: Apple Inc.

Inventor： Paul S. Drzaic ,  Tae-Wook Koh ,  Ross Thompson ,  Guy Cote ,  Christopher P. Tann ,  Jerrold V. Hauck ,  Yifan Zhang ,  Jean-Pierre Guillou ,  Ian C. Hendry ,  Vanessa C. Heppolette ,  Arthur L. Spence

IPC: G09G3/00 ,  G09G3/20 ,  G06F3/06 ,  G09G3/3208 ,  G06F9/4401 ,  G09G3/32 ,  G06F9/451

Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.

公开(公告)号：US20190208205A1

公开(公告)日：2019-07-04

申请号：US16294258

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

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

CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/136 ,  H04N19/15 ,  H04N19/157 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70 ,  H04N19/86 ,  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：US20190182487A1

公开(公告)日：2019-06-13

申请号：US16277892

申请日：2019-02-15

Applicant: Apple Inc.

Inventor： Haitao Guo ,  Hao Pan ,  Guy Cote ,  Andrew Bai

IPC: H04N19/14 ,  G09G3/20 ,  H04N5/50 ,  G06T5/00 ,  H04N19/136 ,  H04N19/184 ,  H04N19/186 ,  H04N19/169 ,  H04N19/44 ,  H04N19/30 ,  H04N19/33 ,  H04N19/176 ,  H04N19/182 ,  H04N19/52 ,  H04N5/20 ,  H04N21/422 ,  H04N19/172 ,  H04N21/431 ,  H04N19/102 ,  H04N19/98 ,  H04N19/137 ,  H04N19/177 ,  H04N9/64 ,  G09G5/10 ,  G09G5/02 ,  G06F3/14 ,  H04N5/235 ,  G09G5/00 ,  H04N19/17 ,  H04N9/67 ,  H04N19/154 ,  H04N19/124 ,  H04N1/60 ,  H04N1/64

Abstract: Video processing techniques and pipelines that support capture, distribution, and display of high dynamic range (HDR) image data to both HDR-enabled display devices and display devices that do not support HDR imaging. A sensor pipeline may generate standard dynamic range (SDR) data from HDR data captured by a sensor using tone mapping, for example local tone mapping. Information used to generate the SDR data may be provided to a display pipeline as metadata with the generated SDR data. If a target display does not support HDR imaging, the SDR data may be directly rendered by the display pipeline. If the target display does support HDR imaging, then an inverse mapping technique may be applied to the SDR data according to the metadata to render HDR data for display. Information used in performing color gamut mapping may also be provided in the metadata and used to recover clipped colors for display.