公开(公告)号：US20190208204A1

公开(公告)日：2019-07-04

申请号：US16294229

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：US10341574B2

公开(公告)日：2019-07-02

申请号：US16049412

申请日：2018-07-30

Applicant: Apple Inc.

Inventor： Guy Cote ,  Garrett M. Johnson ,  James Edmund Orr, IV

IPC: G06K9/00 ,  H04N5/235 ,  G06T5/50 ,  H04N5/232 ,  G06T7/32 ,  H04N9/07

Abstract: Some embodiments provide a method of operating a device to capture an image of a high dynamic range (HDR) scene. Upon the device entering an HDR mode, the method captures and stores multiple images at a first image exposure level. Upon receiving a command to capture the HDR scene, the method captures a first image at a second image exposure level. The method selects a second image from the captured plurality of images. The method composites the first and second images to produce a composite image that captures the HDR scene. In some embodiments, the method captures multiple images at multiple different exposure levels.

公开(公告)号：US10298929B2

公开(公告)日：2019-05-21

申请号：US14967320

申请日：2015-12-13

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

IPC: H04N19/124 ,  H04N19/136 ,  H04N19/30 ,  H04N19/70 ,  H04N19/126 ,  H04N19/186 ,  H04N19/157 ,  H04N19/86 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61 ,  H04N19/96 ,  H04N19/172 ,  H04N19/176

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：US10264269B2

公开(公告)日：2019-04-16

申请号：US14687316

申请日：2015-04-15

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  David W. Singer ,  Krasimir D. Kolarov ,  Steven E. Saunders ,  Guy Cote ,  Sorin Cismas

IPC: H04N19/12 ,  H04N19/44 ,  H04N19/46 ,  H04N19/105 ,  H04N19/147 ,  H04N19/154 ,  H04N19/156 ,  H04N19/172 ,  H04N19/196

Abstract: In a coding system, an encoder codes video data according to a predetermined protocol, which, when decoded causes an associated decoder to perform a predetermined sequence of decoding operations. The encoder may perform local decodes of the coded video data, both in the manner dictated by the coding protocol that is at work and also by one or more alternative decoding operations. The encoder may estimate relative performance of the alternative decoding operations as compared to a decoding operation that is mandated by the coding protocol. The encoder may provide identifiers in metadata that is associated with the coded video data to identify such levels of distortion and/or levels of resources conserved. A decoder may refer to such identifiers when determining when to engage alternative decoding operations as may be warranted under resource conservation policies.

公开(公告)号：US10250883B2

公开(公告)日：2019-04-02

申请号：US15342128

申请日：2016-11-03

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Guy Cote

IPC: H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/51 ,  H04N19/61 ,  H04N19/86 ,  H04N19/30 ,  H04N19/70 ,  H04N19/126 ,  H04N19/186 ,  H04N19/157 ,  H04N19/136 ,  H04N19/96 ,  H04N19/172 ,  H04N19/176

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：US09973723B2

公开(公告)日：2018-05-15

申请号：US14502373

申请日：2014-09-30

Applicant: Apple Inc.

Inventor： Haitao Guo ,  Kenneth I. Greenebaum ,  Guy Cote ,  David W. Singer ,  Alexandros Tourapis

IPC: H04N5/46 ,  G09G5/02 ,  G09G5/36 ,  H04N21/422 ,  H04N21/4223 ,  H04N21/426 ,  H04N21/431 ,  H04N21/44 ,  H04N21/4402 ,  H04N21/442 ,  H04N21/45 ,  H04N21/485 ,  G09G5/00

CPC classification number: H04N5/46 ,  G09G5/006 ,  G09G5/026 ,  G09G5/363 ,  G09G2340/06 ,  H04N21/42202 ,  H04N21/4223 ,  H04N21/42653 ,  H04N21/431 ,  H04N21/44008 ,  H04N21/4402 ,  H04N21/44218 ,  H04N21/4532 ,  H04N21/4854

Abstract: A method and system for adaptively mixing video components with graphics/UI components, where the video components and graphics/UI components may be of different types, e.g., different dynamic ranges (such as HDR, SDR) and/or color gamut (such as WCG). The mixing may result in a frame optimized for a display device's color space, ambient conditions, viewing distance and angle, etc., while accounting for characteristics of the received data. The methods include receiving video and graphics/UI elements, converting the video to HDR and/or WCG, performing statistical analysis of received data and any additional applicable rendering information, and assembling a video frame with the received components based on the statistical analysis. The assembled video frame may be matched to a color space and displayed. The video data and graphics/UI data may have or be adjusted to have the same white point and/or primaries.

公开(公告)号：US20180082626A1

公开(公告)日：2018-03-22

申请号：US15655591

申请日：2017-07-20

Applicant: APPLE INC.

Inventor： Marc Albrecht ,  Mahesh B. Chappalli ,  Christopher P. Tann ,  Jim C. Chou ,  Guy Cote

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

CPC classification number: G09G3/2055 ,  G09G3/2003 ,  G09G3/2051 ,  G09G3/2059 ,  G09G3/3208 ,  G09G3/3607 ,  G09G3/3614 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2320/0257

Abstract: Devices and methods for error diffusion and spatiotemporal dithering are provided. By way of example, a method of operating a display includes receiving a pixel input, a set of pixel coordinates, and a current frame number. A kernel and a particular kernel bit of the kernel is selected from a set of kernels, based upon the pixel input, the pixel coordinates, the frame number, or any combination thereof. A dithered output is determined based at least in part upon the kernel bit. When the display is in a diamond pixel configuration, the dithered output is applied in accordance with a diamond pattern formed by red, blue, or red and blue pixel channels.

公开(公告)号：US09762919B2

公开(公告)日：2017-09-12

申请号：US14472119

申请日：2014-08-28

Applicant: Apple Inc.

Inventor： Guy Cote ,  Joseph P. Bratt ,  Timothy J. Millet ,  Shing I. Kong ,  Joseph J. Cheng

IPC: H04N19/127 ,  H04N19/176 ,  H04N19/186 ,  H04N19/423 ,  H04N19/433 ,  G06F12/00 ,  H04N19/42 ,  H04N19/172 ,  G06T1/60

CPC classification number: H04N19/186 ,  G06F12/00 ,  G06F12/0207 ,  G06F12/0862 ,  G06F12/121 ,  G06F2212/1024 ,  G06F2212/455 ,  G06F2212/6024 ,  G06F2212/6026 ,  G06T1/60 ,  H04N19/127 ,  H04N19/172 ,  H04N19/176 ,  H04N19/423 ,  H04N19/433 ,  H04N19/439

Abstract: Methods and apparatus for caching reference data in a block processing pipeline. A cache may be implemented to which reference data corresponding to motion vectors for blocks being processed in the pipeline may be prefetched from memory. Prefetches for the motion vectors may be initiated one or more stages prior to a processing stage. Cache tags for the cache may be defined by the motion vectors. When a motion vector is received, the tags can be checked to determine if there are cache block(s) corresponding to the vector (cache hits) in the cache. Upon a cache miss, a cache block in the cache is selected according to a replacement policy, the respective tag is updated, and a prefetch (e.g., via DMA) for the respective reference data is issued.

公开(公告)号：US09691349B2

公开(公告)日：2017-06-27

申请号：US14676544

申请日：2015-04-01

Applicant: Apple Inc.

Inventor： Brijesh Tripathi ,  Peter F. Holland ,  Guy Cote

IPC: G09G5/02 ,  G09G5/36 ,  G09G5/391

CPC classification number: G09G5/02 ,  G09G5/363 ,  G09G5/391 ,  G09G2340/0428 ,  G09G2360/02

Abstract: Systems, apparatuses, and methods for passing source pixel data through a display control unit. A display control unit includes N-bit pixel component processing lanes for processing source pixel data. When the display control unit receives M-bit source pixel components, wherein ‘M’ is greater than ‘N’, the display control unit may assign the M-bit source pixel components to the N-bit processing lanes. Then, the M-bit source pixel components may passthrough the pixel component processing elements of the display control unit without being modified.

公开(公告)号：US20160307540A1

公开(公告)日：2016-10-20

申请号：US14691353

申请日：2015-04-20

Applicant: Apple Inc.

Inventor： Peter F. Holland ,  Brijesh Tripathi ,  Guy Cote

IPC: G09G5/02

CPC classification number: G09G5/14 ,  G09G5/026 ,  G09G2320/0242 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2340/06 ,  G09G2360/18

Abstract: Systems, apparatuses, and methods for performing linear scaling in a display control unit. A display control unit receives source image data that has already been gamma encoded with an unknown gamma value. The display control unit includes a hard-coded LUT storing a gamma curve of a first gamma value which is used to perform a degamma operation on the received source image data. Even if the first gamma value used to perform the degamma operation is different from the gamma value used to gamma encode the source image data, fewer visual artifacts are generated as compared with not performing a degamma operation. After the degamma operation is performed, the source image data may be linearly scaled.

Abstract translation: 用于在显示控制单元中执行线性缩放的系统，装置和方法。 显示控制单元接收已经用未知伽马值进行伽马编码的源图像数据。 显示控制单元包括硬编码LUT，其存储用于对所接收的源图像数据执行去角度运算的第一伽玛值的伽马曲线。 即使用于进行反伽马操作的第一伽马值与用于对源图像数据进行伽玛编码的伽马值不同，与不进行除血操作相比，产生较少的视觉伪影。 在执行去雾操作之后，可以线性地缩放源图像数据。