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    In loop chroma deblocking filter
    1.
    发明授权
    In loop chroma deblocking filter 有权

    公开(公告)号：US11102515B2

    公开(公告)日：2021-08-24

    申请号：US16890245

    申请日：2020-06-02

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Dazhong Zhang ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Peikang Song ,  David R. Conrad ,  Jae Hoon Kim ,  Yunfei Zheng

    IPC: H04N19/82 ,  H04N19/186

    Abstract: Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

    Video coding techniques for multi-view video
    2.
    发明授权
    Video coding techniques for multi-view video 有权

    公开(公告)号：US10924747B2

    公开(公告)日：2021-02-16

    申请号：US15443342

    申请日：2017-02-27

    Applicant: Apple Inc.

    Inventor： Jae Hoon Kim ,  Chris Y. Chung ,  Dazhong Zhang ,  Hang Yuan ,  Hsi-Jung Wu ,  Jiefu Zhai ,  Xiaosong Zhou

    IPC: H04B1/66 ,  H04N19/176 ,  H04N19/105 ,  H04N19/112 ,  H04N19/174 ,  H04N19/593 ,  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 still image coding with video compression techniques
    3.
    发明授权
    Efficient still image coding with video compression techniques 有权

    公开(公告)号：US10812832B2

    公开(公告)日：2020-10-20

    申请号：US14732393

    申请日：2015-06-05

    Applicant: Apple Inc.

    Inventor： Hang Yuan ,  Chris Y. Chung ,  Jae Hoon Kim ,  Yeping Su ,  Jiefu Zhai ,  Xiaosong Zhou ,  Hsi-Jung Wu

    IPC: H04N19/85 ,  H04N19/33 ,  H04N19/88 ,  H04N19/503

    Abstract: Coding techniques for image data may cause a still image to be converted to a “phantom” video sequence, which is coded by motion compensated prediction techniques. Thus, coded video data obtained from the coding operation may include temporal prediction references between frames of the video sequence. Metadata may be generated that identifies allocations of content from the still image to the frames of the video sequence. The coded data and the metadata may be transmitted to another device, whereupon it may be decoded by motion compensated prediction techniques and converted back to a still image data. Other techniques may involve coding an image in both a base layer representation and at least one coded enhancement layer representation. The enhancement layer representation may be coded predictively with reference to the base layer representation. The coded base layer representation may be partitioned into a plurality of individually-transmittable segments and stored. Prediction references of elements of the enhancement layer representation may be confined to segments of the base layer representation that correspond to a location of those elements. Meaning, when a pixel block of an enhancement layer maps to a given segment of the base layer representation, prediction references are confined to that segment and do not reference portions of the base layer representation that may be found in other segment(s).

    Video Coding Techniques for Multi-View Video
    7.
    发明申请
    Video Coding Techniques for Multi-View Video 审中-公开

    公开(公告)号：US20180249164A1

    公开(公告)日：2018-08-30

    申请号：US15443342

    申请日：2017-02-27

    Applicant: Apple Inc.

    Inventor： Jae Hoon Kim ,  Chris Y. Chung ,  Dazhong Zhang ,  Hang Yuan ,  Hsi-Jung Wu ,  Jiefu Zhai ,  Xiaosong Zhou

    IPC: H04N19/176 ,  H04N19/105 ,  H04N19/112 ,  H04N19/174 ,  H04N19/593

    CPC classification number: H04N19/176 ,  H04N19/105 ,  H04N19/112 ,  H04N19/174 ,  H04N19/593 ,  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.

    IN LOOP CHROMA DEBLOCKING FILTER
    9.
    发明申请
    IN LOOP CHROMA DEBLOCKING FILTER 审中-公开
    循环色谱去除过滤器

    公开(公告)号：US20150350687A1

    公开(公告)日：2015-12-03

    申请号：US14290873

    申请日：2014-05-29

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Dazhong Zhang ,  Xiaosong Zhou ,  Chris Y. Chung ,  Hsi-Jung Wu ,  Peikang Song ,  David R. Conrad ,  Jae Hoon Kim ,  Yunfei Zheng

    IPC: H04N19/86 ,  H04N19/80 ,  H04N19/44

    CPC classification number: H04N19/82 ,  H04N19/186

    Abstract: Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

    Abstract translation: 可以执行重构的视频样本的色度去块滤波以去除块状伪影并且减少颜色伪影而不会过度平滑。 在第一种方法中，可以对最小变换大小的边界样本执行色度解块，而与分区和编码模式无关。 在第二种方法中，当边界强度大于0时，可以执行色度去块。在第三种方法中，可以执行色度去块，而不管边界强度如何。 在第四种方法中，要执行的色度去块的类型可以通过标志在片头中发出信号。 此外，亮度去块滤波技术可以应用于色度去块滤波。

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