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    Techniques for HDR/WCR video coding
    52.
    发明授权
    Techniques for HDR/WCR video coding 有权

    公开(公告)号：US10536731B2

    公开(公告)日：2020-01-14

    申请号：US14710520

    申请日：2015-05-12

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Jiefu Zhai ,  Ke Zhang ,  Xiaosong Zhou ,  Hsi-Jung Wu ,  Chris Y. Chung

    IPC: H04N19/50 ,  H04N21/2343 ,  H04N21/234 ,  H04N21/2385 ,  H04N21/438 ,  H04N21/44 ,  H04N21/4402 ,  H04N19/186 ,  H04N19/184

    Abstract: Systems and methods are provided for processing high quality video data, such as data having a higher than standard bit depth, a high dynamic range, or a wide or custom color gamut, to be compatible with conventional encoders and decoders without significant loss of quality. High quality data is encoded into a plurality of layers with a base layer having the standard quality data and one or more higher quality layers. Decoding systems and methods may map the base layer to the dynamic range or color gamut of the enhancement layer, combine the layers, and map the combined layers to a dynamic range or color gamut appropriate for the target display. Each of the standard quality and the high quality data may be encoded as a plurality of tiers of increasing quality and reference lower level tiers as sources of prediction during predictive coding.

    POINT CLOUD OCCUPANCY MAP COMPRESSION
    54.
    发明申请
    POINT CLOUD OCCUPANCY MAP COMPRESSION 审中-公开

    公开(公告)号：US20190156520A1

    公开(公告)日：2019-05-23

    申请号：US16198635

    申请日：2018-11-21

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Yeping Su ,  David W. Singer ,  Alexandros Tourapis ,  Fabrice A. Robinet ,  Hsi-Jung Wu

    IPC: G06T9/00 ,  G06T7/70 ,  G06T7/20 ,  G06T7/50

    Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A block/sub-block organization scheme is used to encode blocks and sub-blocks of an occupancy map used in compressing the point cloud. Binary values are assigned to blocks/sub-blocks based on whether they contain patches projected on the point cloud. A traversal path is chosen that takes advantage of run-length encoding strategies to reduce a size of an encoded occupancy map. Also, auxiliary information is used to further improve occupancy map compression.

    CODEC TECHNIQUES FOR FAST SWITCHING
    55.
    发明申请
    CODEC TECHNIQUES FOR FAST SWITCHING 审中-公开

    公开(公告)号：US20190075342A1

    公开(公告)日：2019-03-07

    申请号：US16180115

    申请日：2018-11-05

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Chris Y. Chung ,  Xiaosong Zhou ,  James Oliver Normile ,  Hsi-Jung Wu ,  Thomas Jansen ,  Hyeonkuk Jeong ,  Joe S. Abuan ,  Douglas Scott Price

    IPC: H04N21/2343 ,  H04N21/44 ,  H04N21/438 ,  H04N21/2381

    Abstract: A video streaming method for transitioning between multiple sequences of coded video data may include receiving and decoding transmission units from a first sequence of coded video data. In response to a request to transition to a second sequence of coded video data, the method may determine whether a time to transition to the second sequence of coded video data can be reduced by transitioning to the second sequence of coded video data via an intermediate sequence of coded video data. If the time can be reduced, the method may include receiving at least one transmission unit from an intermediate sequence of coded video data that corresponds to the request to transition, decoding the transmission unit from the intermediate sequence, and transitioning from the first sequence to the second sequence via the decoded transmission unit from the intermediate sequence.

    Transcoding techniques for alternate displays
    56.
    发明授权
    Transcoding techniques for alternate displays 有权

    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.

    Video processors for preserving detail in low-light scenes
    58.
    发明授权
    Video processors for preserving detail in low-light scenes 有权

    公开(公告)号：US09888240B2

    公开(公告)日：2018-02-06

    申请号：US14056043

    申请日：2013-10-17

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Chris Y. Chung ,  Hao Pan ,  Hsi-Jung Wu ,  Ke Zhang

    IPC: H04N19/117 ,  H04N19/136

    CPC classification number: H04N19/117 ,  H04N19/136

    Abstract: Video coding systems and methods are provided that protect against various artifacts (e.g., banding artifacts) in decoded frame content. The embodiments to protect against introducing artifacts include pre-processing the input video frame, controlling the encoding parameters and/or post-processing the decoded video frame. A method for encoding a frame may include calculating a dark-scene score for the frame based on measured statistics of the frame. The dark-scene score may be compared to a threshold to determine if the banding artifacts may be present in the frame. Based on the comparison, filtering parameters for the frame may be altered to reduce the amount of noise filtered from the frame. The frame may be filtered based on the altered filtering parameters and encoded.

    YUV SIGNAL GENERATION FOR HIGH DYNAMIC RANGE VIDEO CONTENT
    60.
    发明申请
    YUV SIGNAL GENERATION FOR HIGH DYNAMIC RANGE VIDEO CONTENT 有权
    YUV信号生成高动态范围视频内容

    公开(公告)号：US20160094823A1

    公开(公告)日：2016-03-31

    申请号：US14603109

    申请日：2015-01-22

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Yeping Su ,  Hsi-Jung Wu ,  Chris Y. Chung ,  Xiaosong Zhou ,  Ke Zhang

    IPC: H04N9/67 ,  H04N9/64

    CPC classification number: H04N9/67 ,  H04N1/646 ,  H04N9/646

    Abstract: An encoder may include a luma transform, a transformer, and a chroma transform. The luma transform may determine a linear luminance value based upon a plurality of primary color values of a pixel. The transformer may generate a transformed luminance value based upon the linear luminance value and a plurality of transformed color values based upon corresponding more than one of the primary color values of the pixel. The chroma transform may determine a plurality of chroma values based upon corresponding plurality of transformed color values and the transformed luminance value of the pixel.

    Abstract translation: 编码器可以包括亮度变换，变压器和色度变换。 亮度变换可以基于像素的多个基色值来确定线性亮度值。 所述变压器可以基于所述线性亮度值和基于所述像素的主要颜色值中的多于一个的多个变换颜色值来生成经变换的亮度值。 色度变换可以基于对应的多个变换颜色值和像素的变换亮度值来确定多个色度值。

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