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    PROCESSING OF EQUIRECTANGULAR OBJECT DATA TO COMPENSATE FOR DISTORTION BY SPHERICAL PROJECTIONS
    1.
    发明申请
    PROCESSING OF EQUIRECTANGULAR OBJECT DATA TO COMPENSATE FOR DISTORTION BY SPHERICAL PROJECTIONS 审中-公开

    公开(公告)号：WO2018151978A1

    公开(公告)日：2018-08-23

    申请号：PCT/US2018/017124

    申请日：2018-02-06

    Applicant: APPLE INC.

    Inventor： KIM, Jae Hoon ,  CHUNG, Chris Y. ,  ZHANG, Dazhong ,  YUAN, Hang ,  WU, Hsi-Jung ,  ZHAI, Jiefu ,  ZHOU, Xiaosong

    IPC: H04N19/597 ,  H04N19/547 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/51

    Abstract: Multi-directional image data often contains distortions of image content that cause problems when processed by video coders that are designed to process traditional, "flat" image content. Embodiments of the present disclosure provide techniques for coding multi-directional image data using such coders. For each pixel block in a frame to be coded, an encoder may transform reference picture data within a search window about a location of the input pixel block based on displacement respectively between the location of the input pixel block and portions of the reference picture within the search window. The encoder may perform a prediction search among the transformed reference picture data to identify a match between the input pixel block and a portion of the transformed reference picture and, when a match is identified, the encoder may code the input pixel block differentially with respect to the matching portion of the transformed reference picture. The transform may counter-act distortions imposed on image content of the reference picture data by the multi-directional format, which aligns the content with image content of the input picture. The techniques apply both for intra-coding and inter-coding.

    CONTEXTUAL VIDEO CONTENT ADAPTATION BASED ON TARGET DEVICE
    2.
    发明申请
    CONTEXTUAL VIDEO CONTENT ADAPTATION BASED ON TARGET DEVICE 审中-公开
    基于目标设备的背景视频内容适配

    公开(公告)号：WO2016200721A1

    公开(公告)日：2016-12-15

    申请号：PCT/US2016/035975

    申请日：2016-06-06

    Applicant: APPLE INC.

    Inventor： CHUNG, Chris Y. ,  WU, Hsi-Jung ,  ZHOU, Xiaosong ,  KIM, Jae Hoon ,  XUE, Jingteng

    IPC: G11B27/034 ,  H04N21/2343 ,  H04N21/238 ,  H04N21/24 ,  H04N21/2668

    CPC classification number: H04L65/602 ,  G11B27/034 ,  H04L65/4069 ,  H04N21/234363 ,  H04N21/23439 ,  H04N21/25825 ,  H04N21/2668 ,  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。

    SPHERE PROJECTED MOTION ESTIMATION/COMPENSATION AND MODE DECISION
    3.
    发明申请
    SPHERE PROJECTED MOTION ESTIMATION/COMPENSATION AND MODE DECISION 审中-公开

    公开(公告)号：WO2018118159A1

    公开(公告)日：2018-06-28

    申请号：PCT/US2017/051542

    申请日：2017-09-14

    Applicant: APPLE INC.

    Inventor： KIM, Jae Hoon ,  ZHOU, Xiaosong ,  ZHANG, Dazhong ,  YUAN, Hang ,  ZHAI, Jiefu ,  CHUNG, Chris Y. ,  WU, Hsi-Jung

    IPC: H04N19/597 ,  H04N19/547

    CPC classification number: H04N19/597 ,  H04N19/105 ,  H04N19/176 ,  H04N19/547

    Abstract: Techniques are disclosed for coding video data predictively based on predictions made from spherical-domain projections of input pictures to be coded and reference pictures that are prediction candidates. Spherical projection of an input picture and the candidate reference pictures may be generated. Thereafter, a search may be conducted for a match between the spherical-domain representation of a pixel block to be coded and a spherical-domain representation of the reference picture. On a match, an offset may be determined between the spherical-domain representation of the pixel block to a matching portion of the of the reference picture in the spherical-domain representation. The spherical-domain offset may be transformed to a motion vector in a source-domain representation of the input picture, and the pixel block may be coded predictively with reference to a source-domain representation of the matching portion of the reference picture.

    SCALABILITY OF MULTI-DIRECTIONAL VIDEO STREAMING
    4.
    发明申请
    SCALABILITY OF MULTI-DIRECTIONAL VIDEO STREAMING 审中-公开

    公开(公告)号：WO2020055655A1

    公开(公告)日：2020-03-19

    申请号：PCT/US2019/049678

    申请日：2019-09-05

    Applicant: APPLE INC.

    Inventor： TOURAPIS, Alexandros ,  ZHANG, Dazhong ,  YUAN, Hang ,  WU, Hsi-Jung ,  KIM, Jae Hoon ,  ZHAI, Jiefu ,  CHEN, Ming ,  ZHOU, Xiaosong

    IPC: H04N19/167 ,  H04N19/187 ,  H04N21/218

    Abstract: Aspects of the present disclosure provide techniques for reducing latency and improving image quality of a viewport extracted from multi-directional video communications. First streams of coded video data are received from a source. The first streams include coded data for each of a plurality of tiles representing a multi-directional video, where each tile corresponding to a predetermined spatial region of the multi-directional video, and at least one tile of the plurality of tiles in the first streams contains a current viewport location at a receiver. The techniques include decoding the first streams and displaying the tile containing the current viewport location. When the viewport location at the receiver changes to include a new tile of the plurality of tiles, retrieving and decoding first streams for the new tile, displaying the decoded content for the changed viewport location, and transmitting the changed viewport location to the source.

    VIDEO CODING TECHNIQUES FOR MULTI-VIEW VIDEO
    5.
    发明申请
    VIDEO CODING TECHNIQUES FOR MULTI-VIEW VIDEO 审中-公开

    公开(公告)号：WO2018156403A1

    公开(公告)日：2018-08-30

    申请号：PCT/US2018/018246

    申请日：2018-02-14

    Applicant: APPLE INC.

    Inventor： KIM, Jae Hoon ,  CHUNG, Chris Y. ,  ZHANG, Dazhong ,  YUAN, Hang ,  WU, Hsi-Jung ,  ZHAI, Jiefu ,  ZHOU, Xiaosong

    IPC: H04N19/597

    Abstract: Techniques are disclosed for coding and decoding video captured as cube map images. According to these techniques, padded reference images are generated for use during predicting input data, A reference image is stored in a cube map format, A padded reference image is generated from the reference image in which image data of a first view contained in reference image is replicated and placed adjacent to a second view contained in the cube map image. When coding a pixel block of an input image, a prediction search may be performed between the input pixel block and content of the padded reference image. When the prediction search identifies a match, the pixel block may be coded with respect to matching data from the padded reference image. Presence of replicated data in the padded reference image is expected to increase the likelihood that adequate prediction matches will be identified for input pixel block data, which will increase overall efficiency of the video coding.

    EFFICIENT SAO SIGNALING
    7.
    发明申请
    EFFICIENT SAO SIGNALING 审中-公开
    高效的信号

    公开(公告)号：WO2015184309A1

    公开(公告)日：2015-12-03

    申请号：PCT/US2015/033265

    申请日：2015-05-29

    Applicant: APPLE INC.

    Inventor： KIM, Jae Hoon ,  CHUNG, Chris Y. ,  WU, Hsi-Jung ,  ZHANG, Dazhong ,  ZHENG, Yunfei ,  ZHOU, Xiaosong

    IPC: H04N19/176 ,  H04N19/70 ,  H04N19/117 ,  H04N19/82

    CPC classification number: H04N19/129 ,  H04N19/117 ,  H04N19/136 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/46 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

    Abstract: Methods and systems provide efficient sample adaptive offset (SAO) signaling by reducing a number of bits consumed for signaling SAO compared with conventional methods. In an embodiment, a single flag is used if a coding unit to a first scanning direction with respect to a given coding unit is off. In an embodiment, further bits may be saved if some neighboring coding units are not present, i.e. the given coding unit is an edge. For example, a flag may be skipped, e.g., not signaled, if the given coding unit does not have a neighbor. In an embodiment, a syntax element, one or more flags may signal whether SAO filtering is performed in a coding unit. Based on the syntax element, a merge flag may be skipped to save bits. In an embodiment, SAO syntax may be signaled at a slice level.

    Abstract translation: 方法和系统通过减少与常规方法相比信号SAO消耗的比特数来提供有效的采样自适应偏移（SAO）信令。 在一个实施例中，如果关于给定编码单元的第一扫描方向的编码单元关闭，则使用单个标志。 在一个实施例中，如果不存在一些相邻的编码单元，即给定的编码单元是边缘，则可以节省进一步的比特。 例如，如果给定的编码单元不具有邻居，则可以跳过标志，例如，不发信号。 在一个实施例中，语法元素，一个或多个标志可以发信号通知是否在编码单元中执行SAO滤波。 基于语法元素，可以跳过合并标志来保存位。 在一个实施例中，可以在切片级别发信号通知SAO语法。

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