公开(公告)号：US11211036B2

公开(公告)日：2021-12-28

申请号：US16919495

申请日：2020-07-02

Applicant: Apple Inc.

Inventor： Brijesh Tripathi ,  Arthur L. Spence ,  Joshua P. de Cesare ,  Ilie Garbacea ,  Guy Cote ,  Mahesh B. Chappalli ,  Malcolm D. Gray ,  Christopher P. Tann

IPC: G09G5/39 ,  G09G5/395 ,  G06F3/14 ,  G06F3/147

Abstract: Systems, apparatuses, and methods for implementing a timestamp based display update mechanism. A display control unit includes a timestamp queue for storing timestamps, wherein each timestamp indicates when a corresponding frame configuration set should be fetched from memory. At pre-defined intervals, the display control unit may compare the timestamp of the topmost entry of the timestamp queue to a global timer value. If the timestamp is earlier than the global timer value, the display control unit may pop the timestamp entry and fetch the frame next configuration set from memory. The display control unit may then apply the updates of the frame configuration set to its pixel processing elements. After applying the updates, the display control unit may fetch and process the source pixel data and then drive the pixels of the next frame to the display.

公开(公告)号：US10986345B2

公开(公告)日：2021-04-20

申请号：US16277892

申请日：2019-02-15

Applicant: Apple Inc.

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

IPC: H04N11/02 ,  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 ,  H04N19/86 ,  H04N19/463 ,  H04N21/4223 ,  H04N21/44 ,  H04N21/4402 ,  H04N21/442 ,  H04N21/485

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：US10986341B2

公开(公告)日：2021-04-20

申请号：US16294229

申请日：2019-03-06

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

IPC: H04N19/30 ,  H04N19/15 ,  H04N19/126 ,  H04N19/186 ,  H04N19/51 ,  H04N19/13 ,  H04N19/70 ,  H04N19/159 ,  H04N19/157 ,  H04N19/124 ,  H04N19/136 ,  H04N19/61 ,  H04N19/86 ,  H04N19/172 ,  H04N19/176 ,  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：US10410568B2

公开(公告)日：2019-09-10

申请号：US15874816

申请日：2018-01-18

Applicant: Apple Inc.

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

IPC: G09G3/20 ,  G09G3/00 ,  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：US20190066569A1

公开(公告)日：2019-02-28

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

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：US20180366078A1

公开(公告)日：2018-12-20

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：US10102815B2

公开(公告)日：2018-10-16

申请号：US15890517

申请日：2018-02-07

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：US09807410B2

公开(公告)日：2017-10-31

申请号：US14322711

申请日：2014-07-02

Applicant: Apple Inc.

Inventor： Jim C. Chou ,  Guy Cote

IPC: H04N7/12 ,  H04N19/46 ,  H04N19/182 ,  H04N19/176 ,  H04N19/139 ,  H04N19/103 ,  H04N19/157 ,  H04N19/40 ,  H04N19/42 ,  H04N19/124 ,  H04N19/167

CPC classification number: H04N19/46 ,  H04N19/103 ,  H04N19/124 ,  H04N19/139 ,  H04N19/157 ,  H04N19/167 ,  H04N19/176 ,  H04N19/182 ,  H04N19/40 ,  H04N19/439

Abstract: Video encoders may determine an initial designation of a mode in which to encode a block of pixels in an early stage of a block processing pipeline. A component of a late stage of the block processing pipeline (one that precedes the transcoder) may determine a different mode designation for the block of pixels based on coded block pattern information, motion vector information, the position of the block in a row of such blocks, the order in which such blocks are processed in the pipeline, or other encoding related syntax elements. The component in the late stage may communicate information to the transcoder usable in coding the block of pixels, such as modified syntax elements or an end of row marker. The transcoder may encode the block of pixels in accordance with the different mode designation or may change the mode again, dependent on the communicated information.

公开(公告)号：US20170214912A1

公开(公告)日：2017-07-27

申请号：US15004479

申请日：2016-01-22

Applicant: Apple Inc.

Inventor： Guy Cote ,  Athanasios Leontaris

IPC: H04N19/11 ,  H04N19/132 ,  H04N19/61 ,  H04N19/593 ,  H04N19/124 ,  H04N19/154

CPC classification number: H04N19/11 ,  H04N19/124 ,  H04N19/132 ,  H04N19/147 ,  H04N19/154 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

Abstract: System and method for improving operational efficiency of a video encoding pipeline, which includes a mode decision block that selects a luma intra-frame prediction mode used to encode a luma component of the source image data and a chroma reconstruction block that determines a first distortion expected to result in a first chroma transform block when each of a plurality of candidate chroma intra-frame prediction modes is implemented based on reconstructed image data, determines a second distortion expected to result in a second chroma transform block of the prediction unit when each of the plurality of candidate chroma intra-frame prediction modes is implemented based at least in part on the source image data, and selects a chroma intra-frame prediction mode used to encode a chroma component from the plurality of candidate chroma intra-frame prediction modes based at least in part on the first distortion and the second distortion.

公开(公告)号：US20170092228A1

公开(公告)日：2017-03-30

申请号：US14871869

申请日：2015-09-30

Applicant: Apple Inc.

Inventor： Guy Cote ,  Mahesh B. Chappalli ,  Venu M. Duggineni

IPC: G09G5/10 ,  G09G5/30 ,  G09G3/3225

CPC classification number: G09G5/10 ,  G09G3/20 ,  G09G3/3225 ,  G09G3/3406 ,  G09G5/30 ,  G09G2320/062 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2360/12 ,  G09G2360/144 ,  G09G2360/148 ,  G09G2360/16

Abstract: An electronic display includes a display side and an ambient light sensor configured to measure received light received through the display side. The electronic display also includes multiple pixels located between the display side and the ambient light sensor. The multiple pixels are configured to emit display light through the display side.