公开(公告)号：US20190068992A1

公开(公告)日：2019-02-28

申请号：US16173105

申请日：2018-10-29

Applicant: Apple Inc.

Inventor： Alexandros TOURAPIS ,  David W. SINGER ,  Haitao GUO ,  Hsi-Jung WU ,  Sorin C. CISMAS ,  Xiaohua YANG ,  Yeping SU ,  Dazhong ZHANG

IPC: H04N19/593 ,  H04N19/174 ,  H04N19/156 ,  H04N19/176 ,  H04N19/182 ,  H04N19/117

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.

公开(公告)号：US20150245004A1

公开(公告)日：2015-08-27

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: H04N11/20 ,  H04N5/46

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.

Abstract translation: 一种用于将视频组件与图形/ UI组件自适应地混合的方法和系统，其中视频组件和图形/ UI组件可以是不同类型的，例如不同的动态范围（例如HDR，SDR）和/或色域（诸如 WCG）。 混合可能导致针对显示设备的颜色空间，环境条件，观看距离和角度等优化的框架，同时考虑接收到的数据的特性。 这些方法包括接收视频和图形/ UI元素，将视频转换为HDR和/或WCG，对所接收的数据和任何附加的可应用的呈现信息进行统计分析，以及基于统计分析与接收的组件组合视频帧。 组合的视频帧可以与颜色空间匹配并显示。 视频数据和图形/ UI数据可以具有或被调整为具有相同的白点和/或初级。

公开(公告)号：US20240292034A1

公开(公告)日：2024-08-29

申请号：US18422423

申请日：2024-01-25

Applicant: APPLE INC.

Inventor： Leo BARNES ,  Davide CONCION ,  David W. SINGER ,  Dimitri PODBORSKI

IPC: H04N19/70 ,  G06T7/90 ,  G06T9/00

CPC classification number: H04N19/70 ,  G06T7/90 ,  G06T9/00

Abstract: Embodiments of the present disclosure provide a HEIF-based encapsulation technique that is optimized for delivery of small images over communication networks, such as the Internet. In such applications, the coded image content may have a small content payload, the spatial area of the image is small as compared to the range of image sizes that HEIF otherwise supports, and the image may contain only a limited number of representations. According to these embodiments, overhead signaling for these images may be condensed into a distinct box that is distinguishable from other types of HEIF boxes by its character code. The box may be a self-contained unit that contains both the overhead signaling and the coded content of the image itself.

公开(公告)号：US20210400273A1

公开(公告)日：2021-12-23

申请号：US17234596

申请日：2021-04-19

Applicant: Apple Inc.

Inventor： Krishnakanth RAPAKA ,  Jaehong CHON ,  Alexandros TOURAPIS ,  David W. SINGER

IPC: H04N19/124 ,  H04N19/82 ,  H04N19/186 ,  H04N19/172

Abstract: Improved video coding and decoding techniques are described, including techniques to derive quantization step sizes adaptively with quantization step size table templates. Quantization techniques described provide finer-grained control over quantization with a more flexible quantization step size especially at higher degrees of quantization. This may result in improved overall compression quality. Other coding parameters, such as in-loop filtering parameters, may be derived based on the more flexible quantization parameters.