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    BLIND NOISE ANALYSIS FOR VIDEO COMPRESSION
    11.
    发明申请
    BLIND NOISE ANALYSIS FOR VIDEO COMPRESSION 审中-公开
    用于视频压缩的盲点噪声分析

    公开(公告)号：US20100246688A1

    公开(公告)日：2010-09-30

    申请号：US12463871

    申请日：2009-05-11

    Applicant: Gianluca FILIPPINI ,  Xiaosong ZHOU ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Ionut HRISTODORESCU

    Inventor： Gianluca FILIPPINI ,  Xiaosong ZHOU ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Ionut HRISTODORESCU

    IPC: H04N7/12

    CPC classification number: H04N19/176 ,  H04N19/103 ,  H04N19/122 ,  H04N19/124 ,  H04N19/154 ,  H04N19/61 ,  H04N19/91

    Abstract: Example embodiments of the present invention provide a method or device for coding source video. The method or device may provide for a segment of video frames from the source video, computing a noise map for the segment of the source video where the noise map is computed from differences among pixels selected from spatially-distributed sampling patterns in the segment, computing control parameter adjustments based on the noise map, and coding the selected segment of source video according to control parameters generated from a default coding policy and the control parameter adjustments, where the default coding policy includes default control parameters of the encoder.

    Abstract translation: 本发明的示例实施例提供了一种用于对源视频进行编码的方法或装置。 该方法或装置可以提供来自源视频的一段视频帧，计算源视频段的噪声图，其中根据片段中空间分布的采样模式中选择的像素之间的差异来计算噪声图，计算 根据噪声图控制参数调整，以及根据从默认编码策略生成的控制参数和控制参数调整对所选择的源视频段进行编码，其中默认编码策略包括编码器的默认控制参数。

    Hierarchical Bi-Directional P Frames
    12.
    发明申请
    Hierarchical Bi-Directional P Frames 审中-公开
    分层双向P帧

    公开(公告)号：US20100008419A1

    公开(公告)日：2010-01-14

    申请号：US12339735

    申请日：2008-12-19

    Applicant: Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Gianluca FILIPPINI ,  Ionut HRISTODORESCU

    Inventor： Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Gianluca FILIPPINI ,  Ionut HRISTODORESCU

    IPC: H04N7/32

    CPC classification number: H04N19/105 ,  H04N19/31 ,  H04N19/577

    Abstract: Embodiments of the present invention provide systems, methods and apparatuses for generating forward, backward or bi-directional P frames. Prior to encoding a sequence of video frames, P frames within the video sequence can be reordered to include causal and/or non-causal references to one or more reference frames. This allows any block partition of a bi-directional P frame to include a single reference to a reference frame that is temporally displayed either before or after the bi-directional P frame. Compression and visual quality can therefore be improved. Hierarchical frame structures can be constructed using bi-directional P frames to better accommodate low complexity decoding profiles. Multilayered encoded video bitstreams can be generated based on the hierarchical frame structures and can include a first layer of anchor frames and one or more second layers that include bi-directional P frames that reference the anchor frames and/or any frame in any lower level layer.

    Abstract translation: 本发明的实施例提供用于产生前向，后向或双向P帧的系统，方法和装置。 在对一系列视频帧进行编码之前，视频序列内的P帧可以被重新排序，以包括对一个或多个参考帧的因果和/或非因果引用。 这允许双向P帧的任何块分区包括在双向P帧之前或之后临时显示的参考帧的单个引用。 因此可以提高压缩和视觉质量。 可以使用双向P帧来构建分层帧结构，以更好地适应低复杂度的解码简档。 可以基于分级帧结构来生成多层编码视频比特流，并且可以包括第一层锚帧和一个或多个第二层，其包括引用锚帧和/或任何较低级别层中的任何帧的双向P帧 。

    IMAGE ACQUISITION AND ENCODING SYSTEM
    14.
    发明申请
    IMAGE ACQUISITION AND ENCODING SYSTEM 审中-公开
    图像采集和编码系统

    公开(公告)号：US20100309987A1

    公开(公告)日：2010-12-09

    申请号：US12533927

    申请日：2009-07-31

    Applicant: Davide CONCION ,  Xiaosong ZHOU ,  Guy COTE ,  Cecile FORET ,  Haitao (Harry) GUO ,  Ionut HRISTODORESCU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Hsi-Jung WU

    Inventor： Davide CONCION ,  Xiaosong ZHOU ,  Guy COTE ,  Cecile FORET ,  Haitao (Harry) GUO ,  Ionut HRISTODORESCU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Hsi-Jung WU

    IPC: H04N7/26 ,  H04N7/24

    CPC classification number: H04N5/772 ,  H04N5/765 ,  H04N5/781 ,  H04N5/85 ,  H04N9/7921 ,  H04N9/8042 ,  H04N9/8205 ,  H04N19/107 ,  H04N19/124 ,  H04N19/139 ,  H04N19/14 ,  H04N19/40 ,  H04N19/46 ,  H04N19/85

    Abstract: A method and system are provided to encode a video sequence into a compressed bitstream. An encoder receives a video sequence from an image-capture device, together with metadata associated with the video sequence, and codes the video sequence into a first compressed bitstream using the metadata to select or revise a coding parameter associated with a coding operation. Optionally, the video sequence may be conditioned for coding by a preprocessor, which also may use the metadata to select or revise a preprocessing parameter associated with a preprocessing operation. The encoder may itself generate metadata associated with the first compressed bitstream, which may be used together with any metadata received by the encoder, to transcode the first compressed bitstream into a second compressed bitstream. The compressed bitstreams may be decoded by a decoder to generate recovered video data, and the recovered video data may be conditioned for viewing by a postprocessor, which may use the metadata to select or revise a postprocessing parameter associated with a postprocessing operation.

    Abstract translation: 提供了将视频序列编码为压缩比特流的方法和系统。 编码器从图像捕获装置接收视频序列以及与视频序列相关联的元数据，并且使用元数据将视频序列编码为第一压缩比特流，以选择或修改与编码操作相关联的编码参数。 可选地，视频序列可以由预处理器进行调节，预处理器也可以使用元数据来选择或修改与预处理操作相关联的预处理参数。 编码器本身可以产生与可与编码器接收的任何元数据一起使用的第一压缩比特流相关联的元数据，以将第一压缩比特流转码为第二压缩比特流。 压缩比特流可以由解码器解码以产生恢复的视频数据，并且恢复的视频数据可以被调整为由后处理器进行查看，后处理器可以使用元数据来选择或修改与后处理操作相关联的后处理参数。

    DYNAMIC DITHERING FOR VIDEO COMPRESSION
    16.
    发明申请
    DYNAMIC DITHERING FOR VIDEO COMPRESSION 有权
    动态压缩视频压缩

    公开(公告)号：US20100246689A1

    公开(公告)日：2010-09-30

    申请号：US12463859

    申请日：2009-05-11

    Applicant: Gianluca FILIPPINI ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Ionut HRISTODORESCU

    Inventor： Gianluca FILIPPINI ,  Hsi-Jung WU ,  James Oliver NORMILE ,  Xiaojin SHI ,  Xiaosong ZHOU ,  Ionut HRISTODORESCU

    IPC: H04N7/26

    CPC classification number: H04N19/90 ,  H04N19/124 ,  H04N19/136 ,  H04N19/154 ,  H04N19/86

    Abstract: A method and device for dithering video from a decoder. The method and device provide: selecting a segment of video frames from the video; computing a noise map for the segment of the video, the noise map computed from differences among pixels selected from spatially-distributed sampling patterns in the segment; determining contours of quantization artifacts within the video frame based on the noise map and a histogram of pixel values in the video frame; computing a gradient measurement of pixel values along the contours; identifying regions along the contours of quantization artifacts to apply dithering based on the noise map and the gradient measurement; determining a dithering strength based on the noise map and the gradient measurement; and applying dithering noise to the identified regions at the determined dithering strength.

    Abstract translation: 一种从解码器抖动视频的方法和装置。 该方法和设备提供：从视频中选择一段视频帧; 计算视频段的噪声映射，根据从片段中的空间分布采样模式中选择的像素之间的差异计算的噪声图; 基于噪声图和视频帧中的像素值的直方图确定视频帧内的量化伪像的轮廓; 计算沿着轮廓的像素值的梯度测量; 识别沿着量化伪影轮廓的区域，以基于噪声图和梯度测量应用抖动; 基于噪声图和梯度测量确定抖动强度; 并以确定的抖动强度对所识别的区域施加抖动噪声。

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