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    Gaze direction-based adaptive pre-filtering of video data
    55.
    发明授权
    Gaze direction-based adaptive pre-filtering of video data 有权

    公开(公告)号：US10861142B2

    公开(公告)日：2020-12-08

    申请号：US16040496

    申请日：2018-07-19

    Applicant: Apple Inc.

    Inventor： Can Jin ,  Nicolas Pierre Marie Frederic Bonnier ,  Hao Pan

    IPC: G06T5/20 ,  G02B27/01 ,  G06T19/00 ,  G06F3/01

    Abstract: A multi-layer low-pass filter is used to filter a first frame of video data representing at least a portion of an environment of an individual. A first layer of the filter has a first filtering resolution setting for a first subset of the first frame, while a second layer of the filter has a second filtering resolution setting for a second subset. The first subset includes a data element positioned along a direction of a gaze of the individual, and the second subset of the frame surrounds the first subset. A result of the filtering is compressed and transmitted via a network to a video processing engine configured to generate a modified visual representation of the environment.

    Deep Quality Enhancement of Adaptive Downscaled Coding for Image Compression
    56.
    发明申请
    Deep Quality Enhancement of Adaptive Downscaled Coding for Image Compression 审中-公开

    公开(公告)号：US20200053362A1

    公开(公告)日：2020-02-13

    申请号：US16100310

    申请日：2018-08-10

    Applicant: Apple Inc.

    Inventor： Xiang Fu ,  Linfeng Guo ,  Haiyan He ,  Wei Li ,  Xu Gang Zhao ,  Hao Pan ,  Xiaohua Yang ,  Krishnakanth Rapaka ,  Munehiro Nakazato ,  Haitao Guo

    IPC: H04N19/176 ,  H04N19/126 ,  G06N3/08 ,  G06T7/13

    Abstract: Techniques are disclosed for coding image data adaptively at different levels of downscaling. Such techniques may involve partitioning input data into pixel blocks for coding and performing content analysis on the pixel blocks. The pixel blocks may be input to block coders that operate at different pixel block sizes, which may code the pixel blocks input to them at their respective sizes. Except when a block coder operates at the partitioning size, block coders that operate at different pixel block sizes may perform downscaling of the pixel blocks to match their size with the block coders' respective coding size. A block decoder may invert the coding operations performed by the block coders, decoding coded image data at respective pixel block sizes, then upscaling decoded image data obtained therefrom to a common pixel block size. Image reconstruction may synthesize a resultant image from the decode pixel block data output by the decoders. Quality enhancements may be added by neural network processing systems that have been trained to other segmented images.

    Encoding techniques for banding reduction
    60.
    发明授权
    Encoding techniques for banding reduction 有权
    用于条带缩减的编码技术

    公开(公告)号：US09565404B2

    公开(公告)日：2017-02-07

    申请号：US13707404

    申请日：2012-12-06

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Hsi-Jung Wu ,  Hao Pan

    IPC: H04N7/26 ,  H04N19/10 ,  H04N19/117 ,  H04N19/463 ,  H04N19/14 ,  H04N19/17 ,  H04N19/80 ,  H04N19/176 ,  H04N19/61 ,  H04N19/577

    CPC classification number: H04N19/10 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/176 ,  H04N19/463 ,  H04N19/577 ,  H04N19/61 ,  H04N19/80

    Abstract: Video encoders often produce banding artifacts on areas with smooth gradients and low levels of detail/noise. In this disclosure, a video encoding system identifies the banded areas and adjusts coding parameters accordingly. The video coder may include a pre-coding banding detector and a post-coding banding detector. The pre-coding detector may identify regions in the input picture with smooth gradients that are likely to have banding artifacts after encoding. The post-coding detector may identify regions in the reconstructed picture with visible banding. Usage of pre-coding detector and/or post-coding detector depends on how an encoder operates. In a single-pass encoding or during the first pass of a multi-pass encoding, the pre-coding detection maps are used. During picture re-encoding or during later passes of a multi-pass encoding, the post-coding detector maps are used.

    Abstract translation: 视频编码器经常在平滑梯度和低细节/噪音水平的区域产生带状伪影。 在本公开中，视频编码系统识别带状区域并相应地调整编码参数。 视频编码器可以包括预编码带状检测器和后编码条带检测器。 预编码检测器可以在编码后可能具有可能具有带状伪影的平滑梯度来识别输入图像中的区域。 后编码检测器可以用可见条带识别重建图像中的区域。 预编码检测器和/或后编码检测器的使用取决于编码器如何工作。 在单遍编码中或在多遍编码的第一遍期间，使用预编码检测图。 在图像重新编码期间或在多遍编码的稍后通过期间，使用后编码检测器图。

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