公开(公告)号：US10574997B2

公开(公告)日：2020-02-25

申请号：US15796313

申请日：2017-10-27

Applicant: Apple Inc.

Inventor： Chris Y. Chung ,  Mei Guo ,  Hsi-Jung Wu ,  Jingteng Xue ,  Jun Xin

IPC: H04N19/176 ,  H04N19/117 ,  H04N19/147 ,  H04N19/82 ,  H04N19/105 ,  H04N19/196

Abstract: Systems and methods are disclosed for coding pixel blocks of an input frame in which coding costs of a plurality of candidate coding modes are estimated. A coding cost of a candidate coding mode may be estimated based on noise estimate associated with the candidate coding mode. A coding mode for the input pixel block may be selected based on a comparison of the estimated coding costs of the plurality of candidate coding modes. The input pixel block may then be coded according to the selected coding mode.

公开(公告)号：US20190132594A1

公开(公告)日：2019-05-02

申请号：US15796313

申请日：2017-10-27

Applicant: Apple Inc.

Inventor： Chris Y. Chung ,  Mei Guo ,  Hsi-Jung Wu ,  Jingteng Xue ,  Jun Xin

IPC: H04N19/147 ,  H04N19/105 ,  H04N19/176 ,  H04N19/117 ,  H04N19/196 ,  H04N19/82

CPC classification number: H04N19/147 ,  H04N19/103 ,  H04N19/105 ,  H04N19/117 ,  H04N19/154 ,  H04N19/176 ,  H04N19/196 ,  H04N19/82

Abstract: Techniques are disclosed for coding pixel blocks of an input frame in which coding costs of a plurality of candidate coding modes are estimated, in which estimates of distortion include an estimate of noise of each respective candidate coding mode. Thus, evaluation of each coding mode may involve searching for a prediction reference for a pixel block according to the mode, and estimating coding cost of the respective candidate coding mode based at least in part on an estimate of noise associated with the respective coding mode. A coding mode for the input pixel block may be selected based on a comparison of the coding costs of the candidate coding modes, and the input pixel block may be coded according to the selected coding mode. By estimating noise associated with the candidate coding modes and, in particular, employing techniques to maintain consistent levels of noise across different frames of a coded video sequence, it is expected that perceived quality of coding will be improved.

公开(公告)号：US20180352264A1

公开(公告)日：2018-12-06

申请号：US15612806

申请日：2017-06-02

Applicant: Apple Inc.

Inventor： Mei Guo ,  Feng Yi ,  Jun Xin ,  Chris Y. Chung ,  Yeping Su ,  Xiaosong Zhou ,  Jun Xu ,  Hsi-Jung Wu ,  Jingteng Xue

IPC: H04N19/86 ,  H04N19/117

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/159

Abstract: Methods of in-loop deblocking filter for high dynamic range (HDR) video compression are disclosed. HDR processing and standard dynamic range (SDR) processing adopt different electro-optical transfer function (EOTF) to convert digital code words to linear luminance. For compressing HDR video, EOTF is proposed to be involved in the selection of two deblocking parameters, β and tC, which control the strength of deblocking filter. In local activity checking for filter decisions, the calculated local signal characteristics and the thresholds are adjusted according to EOTF. After deblocking filter, the clipping range is modified based on EOTF. The chroma deblocking filter is also extended to inter-inter block boundary.

公开(公告)号：US20170359586A1

公开(公告)日：2017-12-14

申请号：US15179728

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Jingteng Xue ,  Yeping Su ,  Chris Chung ,  Xiaosong Zhou ,  Hsi-Jung Wu

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/44 ,  H04N19/40

CPC classification number: H04N19/167 ,  H04N19/115 ,  H04N19/124 ,  H04N19/162 ,  H04N19/17 ,  H04N19/33 ,  H04N19/40 ,  H04N19/44 ,  H04N19/70 ,  H04N19/80 ,  H04N19/85

Abstract: Video coding techniques are disclosed for resource-limited destination display devices. Input video data may be coded by converting a first representation of the input video to a resolution of a destination display and base layer coding the converted representation. Additionally, a region of interest may be predicted from within the input video. The predicted ROI may be converted to a resolution of the destination display, and the converted ROI may be enhancement layer coded. The base layer coded data and the enhancement layer data may be transmitted to the destination display where the coded base layer data is decoded and displayed until a zoom event occurs. When a zoom event occurs, both the coded base layer data and the coded enhancement layer data may be decoded and displayed. Thus, the switchover from a first field of view to an ROI view may be performed quickly.

公开(公告)号：US10749923B2

公开(公告)日：2020-08-18

申请号：US15169641

申请日：2016-05-31

Applicant: Apple Inc.

Inventor： Chris Y. Chung ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Jae Hoon Kim ,  Jingteng Xue

IPC: G06F15/16 ,  H04L29/06 ,  H04W88/02 ,  H04N21/2668 ,  G11B27/034 ,  H04N21/2343 ,  H04N21/258

Abstract: Methods and apparatus for contextual video content adaptation are disclosed. Video content is adapted based on any number of criteria such as a target device type, viewing conditions, network conditions or various use cases, for example. A target adaptation of content may be defined for a specified video source. For example, based on receiving a request from a portable device for a live sports feed, a shortened and reduced resolution version of the live sport feed video may be defined for the portable device. The source content may be accessed and adapted (e.g., adapted temporally, spatially, etc.) and an adapted version of content generated. For example, the source content may be cropped to a particular spatial region of interest and/or reduced in length to a particular scene. The generated adaptation may be transmitted to a device in response to the request, or stored to a storage device.

公开(公告)号：US10212456B2

公开(公告)日：2019-02-19

申请号：US15612806

申请日：2017-06-02

Applicant: Apple Inc.

Inventor： Mei Guo ,  Feng Yi ,  Jun Xin ,  Chris Y. Chung ,  Yeping Su ,  Xiaosong Zhou ,  Jun Xu ,  Hsi-Jung Wu ,  Jingteng Xue

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/159

Abstract: Methods of in-loop deblocking filter for high dynamic range (HDR) video compression are disclosed. HDR processing and standard dynamic range (SDR) processing adopt different electro-optical transfer function (EOTF) to convert digital code words to linear luminance. For compressing HDR video, EOTF is proposed to be involved in the selection of two deblocking parameters, β and tC, which control the strength of deblocking filter. In local activity checking for filter decisions, the calculated local signal characteristics and the thresholds are adjusted according to EOTF. After deblocking filter, the clipping range is modified based on EOTF. The chroma deblocking filter is also extended to inter-inter block boundary.

公开(公告)号：US10178394B2

公开(公告)日：2019-01-08

申请号：US15179728

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Jingteng Xue ,  Yeping Su ,  Chris Chung ,  Xiaosong Zhou ,  Hsi-Jung Wu

IPC: H04N19/167 ,  H04N19/70 ,  H04N19/40 ,  H04N19/44

Abstract: Video coding techniques are disclosed for resource-limited destination display devices. Input video data may be coded by converting a first representation of the input video to a resolution of a destination display and base layer coding the converted representation. Additionally, a region of interest may be predicted from within the input video. The predicted ROI may be converted to a resolution of the destination display, and the converted ROI may be enhancement layer coded. The base layer coded data and the enhancement layer data may be transmitted to the destination display where the coded base layer data is decoded and displayed until a zoom event occurs. When a zoom event occurs, both the coded base layer data and the coded enhancement layer data may be decoded and displayed. Thus, the switchover from a first field of view to an ROI view may be performed quickly.

公开(公告)号：US20160359937A1

公开(公告)日：2016-12-08

申请号：US15169641

申请日：2016-05-31

Applicant: Apple Inc.

Inventor： Chris Y . Chung ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Jae Hoon Kim ,  Jingteng Xue

IPC: H04L29/06 ,  H04W88/02

Abstract: Methods and apparatus for contextual video content adaptation are disclosed. Video content is adapted based on any number of criteria such as a target device type, viewing conditions, network conditions or various use cases, for example. A target adaptation of content may be defined for a specified video source. For example, based on receiving a request from a portable device for a live sports feed, a shortened and reduced resolution version of the live sport feed video may be defined for the portable device. The source content may be accessed and adapted (e.g., adapted temporally, spatially, etc.) and an adapted version of content generated. For example, the source content may be cropped to a particular spatial region of interest and/or reduced in length to a particular scene. The generated adaptation may be transmitted to a device in response to the request, or stored to a storage device.

Abstract translation: 公开了用于上下文视频内容适配的方法和装置。 基于诸如目标设备类型，观看条件，网络条件或各种用例的任何数量的标准来适配视频内容。 可以为指定的视频源定义内容的目标适配。 例如，基于从便携式设备接收用于实时运动饲料的请求，可以为便携式设备定义实时运动饲料视频的缩短和降低的分辨率版本。 源内容可以被访问和适应（例如，在时间上，空间上等等）和生成的内容的适应版本。 例如，源内容可以被裁剪到感兴趣的特定空间区域和/或缩小到特定场景的长度。 生成的适配可以响应于该请求而发送到设备，或者存储到存储设备。