公开(公告)号：US20190297338A1

公开(公告)日：2019-09-26

申请号：US16435327

申请日：2019-06-07

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N19/186 ,  H04N9/67 ,  H04N19/189 ,  H04N19/59 ,  H04N19/154 ,  H04N19/132 ,  H04N19/117 ,  H04N19/46 ,  H04N19/70 ,  H04N11/20 ,  H04N9/64 ,  H04N19/82 ,  H04N19/85 ,  H04N19/80 ,  H04N19/147 ,  H04N19/44

Abstract: A method of adaptive chroma downsampling is presented. The method comprises converting a source image to a converted image in an output color format, applying a plurality of downsample filters to the converted image and estimating a distortion for each filter chose the filter that produces the minimum distortion. The distortion estimation includes applying an upsample filter, and a pixel is output based on the chosen filter. Methods for closed loop conversions are also presented.

公开(公告)号：US20170318191A1

公开(公告)日：2017-11-02

申请号：US15650750

申请日：2017-07-14

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N1/60 ,  H04N19/85 ,  H04N19/186 ,  H04N19/46 ,  H04N9/67

CPC classification number: H04N1/6005 ,  H04N1/6058 ,  H04N9/67 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

公开(公告)号：US10136033B2

公开(公告)日：2018-11-20

申请号：US15650750

申请日：2017-07-14

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N1/60 ,  H04N9/67 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

公开(公告)号：US20160360234A1

公开(公告)日：2016-12-08

申请号：US15172064

申请日：2016-06-02

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  David William Singer ,  Haitao Guo ,  Hsi-Jung Wu ,  Sorin C. Cismas ,  Xiaohua Yang ,  Yeping Su ,  Dazhong Zhang

IPC: H04N19/593 ,  H04N19/182 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/117 ,  H04N19/156 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182

Abstract: Methods are described for encoding and decoding blocks of image data using intra block copying (IBC). A source block for intra block copying is selected from a source region of a current image that is closer to the current block than a threshold, wherein the source region does not include a portion of the current image that is further from the current block than the threshold.

Abstract translation: 描述了使用块内复制（IBC）对图像数据块进行编码和解码的方法。 从当前图像的比当前块更靠近阈值的源区域中选择用于帧内块复制的源块，其中源区域不包括当前图像的比当前块更远的部分， 阈。

公开(公告)号：US10602025B2

公开(公告)日：2020-03-24

申请号：US16034272

申请日：2018-07-12

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N1/60 ,  H04N9/67 ,  H04N19/46 ,  H04N19/186 ,  H04N19/85

Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.

公开(公告)号：US10070342B2

公开(公告)日：2018-09-04

申请号：US15186138

申请日：2016-06-17

Applicant: Apple Inc.

Inventor： Steven E. Saunders ,  Alexandros Michael Tourapis ,  Krasimir Kolarov

IPC: H04W28/04 ,  H04L12/26 ,  H04W52/02 ,  G06F1/32 ,  H04N19/85 ,  H04N19/44

Abstract: A method includes sampling a common signal over a plurality of iterations, concatenating the sampled iterations, summing samples of the concatenated iterations within a window of a predetermined sample width, at each of a plurality of window positions along the concatenated iterations, and estimating noise of the common signal from the summed sample values at the window positions.

公开(公告)号：US11924440B2

公开(公告)日：2024-03-05

申请号：US17894309

申请日：2022-08-24

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/109 ,  H04N19/147 ,  H04N19/176 ,  H04N19/513 ,  H04N19/567 ,  H04N19/70

CPC classification number: H04N19/159 ,  H04N19/109 ,  H04N19/147 ,  H04N19/176 ,  H04N19/513 ,  H04N19/567 ,  H04N19/70

Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.

公开(公告)号：US11882294B2

公开(公告)日：2024-01-23

申请号：US17894309

申请日：2022-08-24

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/70 ,  H04N19/176 ,  H04N19/567 ,  H04N19/147 ,  H04N19/109 ,  H04N19/513

CPC classification number: H04N19/159 ,  H04N19/109 ,  H04N19/147 ,  H04N19/176 ,  H04N19/513 ,  H04N19/567 ,  H04N19/70

Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.

公开(公告)号：US11463707B2

公开(公告)日：2022-10-04

申请号：US16879007

申请日：2020-05-20

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/70 ,  H04N19/176 ,  H04N19/567 ,  H04N19/147 ,  H04N19/109 ,  H04N19/513

Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.

公开(公告)号：US20180324326A1

公开(公告)日：2018-11-08

申请号：US16034272

申请日：2018-07-12

Applicant: Apple Inc.

Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David William Singer ,  Hsi-Jung Wu

IPC: H04N1/60 ,  H04N19/85 ,  H04N19/186 ,  H04N9/67 ,  H04N19/46

CPC classification number: H04N1/6005 ,  H04N1/6058 ,  H04N9/67 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

Abstract: Image and video processing techniques are disclosed for processing components of a color space individually by determining limits for each component based on the relationship between each component in a color space. These limits may then be used to clip each component such that the component values are within the determined range for that component. In this manner, more efficient processing of images and/or video may be achieved.