中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

285 records (took 0.02 seconds)

    IN LOOP CHROMA DEBLOCKING FILTER
    12.
    发明申请
    IN LOOP CHROMA DEBLOCKING FILTER 审中-公开

    公开(公告)号：US20200296426A1

    公开(公告)日：2020-09-17

    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.

    In loop chroma deblocking filter
    14.
    发明授权
    In loop chroma deblocking filter 有权

    公开(公告)号：US10708623B2

    公开(公告)日：2020-07-07

    申请号：US16050744

    申请日：2018-07-31

    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.

    SCALABILITY OF MULTI-DIRECTIONAL VIDEO STREAMING
    15.
    发明申请
    SCALABILITY OF MULTI-DIRECTIONAL VIDEO STREAMING 审中-公开

    公开(公告)号：US20200092571A1

    公开(公告)日：2020-03-19

    申请号：US16132219

    申请日：2018-09-14

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Dazhong Zhang ,  Hang Yuan ,  Hsi-Jung Wu ,  Jae Hoon Kim ,  Jiefu Zhai ,  Ming Chen ,  Xiaosong Zhou

    IPC: H04N19/29 ,  H04N21/44 ,  G09G5/14 ,  H04N19/103

    Abstract: Aspects of the present disclosure provide techniques for reducing latency and improving image quality of a viewport extracted from multi-directional video communications. According to such techniques, 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.

    Hierarchical sharpness evaluation
    18.
    发明授权
    Hierarchical sharpness evaluation 有权

    公开(公告)号：US10402677B2

    公开(公告)日：2019-09-03

    申请号：US15618909

    申请日：2017-06-09

    Applicant: Apple Inc.

    Inventor： Jiefu Zhai ,  Ke Zhang ,  Yunfei Zheng ,  Shujie Liu ,  Albert Keinath ,  Xiaosong Zhou ,  Chris Chung ,  Hsi-Jung Wu

    IPC: G06K9/00 ,  G06K9/46 ,  G06K9/62

    Abstract: Techniques are disclosed for estimating quality of images in an automated fashion. According to these techniques, a source image may be downsampled to generate at least two downsampled images at different levels of downsampling. Blurriness of the images may be estimated starting with a most-heavily downsampled image. Blocks of a given image may be evaluated for blurriness and, when a block of a given image is estimated to be blurry, the block of the image and co-located blocks of higher resolution image(s) may be designated as blurry. Thereafter, a blurriness score may be calculated for the source image from the number of blocks of the source image designated as blurry.

Patent Agency Ranking