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    METHOD FOR ASSESSING PERCEPTUAL QUALITY
    1.
    发明申请
    METHOD FOR ASSESSING PERCEPTUAL QUALITY 审中-公开
    评估质量的方法

    公开(公告)号：US20120020415A1

    公开(公告)日：2012-01-26

    申请号：US12735427

    申请日：2009-01-13

    申请人： Hua Yang ,  Tao Liu ,  Alan Jay Stein

    发明人： Hua Yang ,  Tao Liu ,  Alan Jay Stein

    IPC分类号： H04N7/26

    CPC分类号： H04N17/004 ,  H04N19/14 ,  H04N19/154 ,  H04N19/166 ,  H04N19/172 ,  H04N19/61 ,  H04N19/89 ,  H04N19/895

    摘要： The present invention relates to a full-reference (FR) objective method for assessing perceptual quality of decoded video frames in the presence of packet losses and coding artifacts. A method of assessing perceptual quality is provided. First, a value indicating an amount of distortion in a corresponding portion is accessed. Then, that value is classified as packet-loss distortion or coding-artifact distortion. Next, the classified value is modified to account for visibility differences of the human visual system, based on the classification, and then the modified values are combined for the multiple portions, to form a value indicating a total amount of distortion for the multiple portions.

    摘要翻译： 本发明涉及一种用于在存在分组丢失和编码伪影的情况下评估解码视频帧的感知质量的全参考（FR）目标方法。 提供了一种评估感知质量的方法。 首先，访问表示对应部分的失真量的值。 然后，该值被分类为分组丢失失真或编码伪像失真。 接下来，基于分类，对分类值进行修改以考虑人类视觉系统的可见性差异，然后对多个部分组合修改值，以形成表示多个部分的总失真量的值。

    METHOD FOR MEASURING FLICKER
    3.
    发明申请
    METHOD FOR MEASURING FLICKER 有权
    测量扑克的方法

    公开(公告)号：US20110052084A1

    公开(公告)日：2011-03-03

    申请号：US12735411

    申请日：2009-01-07

    申请人： Hua Yang ,  Alan Jay Stein ,  Gad Moshe Berger

    发明人： Hua Yang ,  Alan Jay Stein ,  Gad Moshe Berger

    IPC分类号： H04N5/217

    CPC分类号： H04N17/00 ,  G06T7/0002 ,  G06T7/254 ,  G06T2207/10016 ,  G06T2207/30168 ,  H04N7/0132

    摘要： A method for accurately measuring flicker, by first determining an original value based on a difference between pixel values in corresponding locations in a first picture and a second picture. Next, a reconstructed value is determined, based on a difference between pixel values in corresponding locations in a reconstruction from an encoding of the first picture and a reconstruction from an encoding of the second picture. Then, a determination is made to include a comparison value, which is determined on a difference between the reconstructed value and the original value, in a measurement of flicker between the first picture and the second picture.

    摘要翻译： 一种用于通过首先基于第一图像和第二图像中的相应位置中的像素值之间的差异首先确定原始值来精确地测量闪烁的方法。 接下来，基于来自第一图像的编码的重构中的相应位置中的像素值与来自第二图像的编码的重建之间的差异来确定重建值。 然后，确定在第一图像和第二图像之间的闪烁测量中包括在重建值和原始值之间的差上确定的比较值。

    LIGHT CHANGE CODING
    4.
    发明申请
    LIGHT CHANGE CODING 审中-公开
    光变换

    公开(公告)号：US20110211633A1

    公开(公告)日：2011-09-01

    申请号：US13128724

    申请日：2009-11-10

    申请人： Ferran Valldosera ,  Hua Yang ,  Alan Jay Stein

    发明人： Ferran Valldosera ,  Hua Yang ,  Alan Jay Stein

    IPC分类号： H04N7/26

    CPC分类号： H04N19/87 ,  H04N19/105 ,  H04N19/114 ,  H04N19/14 ,  H04N19/172 ,  H04N19/61

    摘要： An encoding methodology for a video encoder encodes target light change (TLC) frames in order to improve the quality of the resulting decoded video. Backward prediction is applied instead of forward prediction to the frames that are detected as TLC frames. Additionally, the last frame of the TLC activity is forced to use only intra-coding modes.

    摘要翻译： 用于视频编码器的编码方法对目标光变化（TLC）帧进行编码，以便提高所得到的解码视频的质量。 应用向后预测而不是前向预测到被检测为TLC帧的帧。 另外，TLC活动的最后一帧被迫仅使用帧内编码模式。

    Method for measuring flicker
    5.
    发明授权
    Method for measuring flicker 有权
    测量闪烁的方法

    公开(公告)号：US08755613B2

    公开(公告)日：2014-06-17

    申请号：US12735411

    申请日：2009-01-07

    申请人： Hua Yang ,  Alan Jay Stein ,  Gad Moshe Berger

    发明人： Hua Yang ,  Alan Jay Stein ,  Gad Moshe Berger

    IPC分类号： H04N5/217

    CPC分类号： H04N17/00 ,  G06T7/0002 ,  G06T7/254 ,  G06T2207/10016 ,  G06T2207/30168 ,  H04N7/0132

    摘要： A method for accurately measuring flicker, by first determining an original value based on a difference between pixel values in corresponding locations in a first picture and a second picture. Next, a reconstructed value is determined, based on a difference between pixel values in corresponding locations in a reconstruction from an encoding of the first picture and a reconstruction from an encoding of the second picture. Then, a determination is made to include a comparison value, which is determined on a difference between the reconstructed value and the original value, in a measurement of flicker between the first picture and the second picture.

    摘要翻译： 一种用于通过首先基于第一图像和第二图像中的相应位置中的像素值之间的差异首先确定原始值来精确地测量闪烁的方法。 接下来，基于来自第一图像的编码的重构中的相应位置中的像素值与来自第二图像的编码的重建之间的差异来确定重建值。 然后，确定在第一图像和第二图像之间的闪烁测量中包括在重建值和原始值之间的差上确定的比较值。

    Video data loss recovery using low bit rate stream in an IPTV system
    7.
    发明授权
    Video data loss recovery using low bit rate stream in an IPTV system 有权
    在IPTV系统中使用低比特率流的视频数据丢失恢复

    公开(公告)号：US08750385B2

    公开(公告)日：2014-06-10

    申请号：US12448291

    申请日：2006-12-20

    申请人： Jiwang Dai ,  John Qiang Li ,  Alan Jay Stein

    发明人： Jiwang Dai ,  John Qiang Li ,  Alan Jay Stein

    IPC分类号： H04N11/04

    CPC分类号： H04N21/23418 ,  H04N19/159 ,  H04N19/172 ,  H04N19/37 ,  H04N19/61 ,  H04N21/23439 ,  H04N21/2365 ,  H04N21/4384 ,  H04N21/440263 ,  H04N21/6405 ,  H04N21/64322

    摘要： A system and method for recovering from data loss are described including monitoring a first bit rate video data bit stream to determine if there is frame loss or damage, multiplexing decoding parameters of a second bit rate video data bit stream, the second bit rate video data bit stream and the first bit rate video data bit stream, if there is frame loss or damage, demultiplexing the first bit rate video data bit stream and the second bit rate video data bit stream, decoding the first bit rate video data bit stream, removing damaged frames from the first bit rate video data bit stream, decoding the second bit rate video data bit stream, up-sampling frames from said processed second bit rate video data bit stream if said processed second bit rate video data bit stream has a lower resolution than said processed first bit rate video data bit stream and merging frames from the second bit rate video data bit stream and the first bit rate video data bit stream.

    摘要翻译： 描述了从数据丢失恢复的系统和方法，包括监视第一比特率视频数据比特流以确定是否存在帧丢失或损坏，复用第二比特率视频数据比特流的解码参数，第二比特率视频数据 比特流和第一比特率视频数据比特流，如果存在帧丢失或损坏，解复用第一比特率视频数据比特流和第二比特率视频数据比特流，对第一比特率视频数据比特流进行解码，去除 来自第一比特率视频数据比特流的损坏帧，对第二比特率视频数据比特流进行解码，如果所述处理的第二比特率视频数据比特流具有较低的分辨率，则从所述处理的第二比特率视频数据比特流向上采样帧 比所述处理的第一比特率视频数据比特流和来自第二比特率视频数据比特流和第一比特率视频数据比特流的合并帧。

    Motion estimation with weighting prediction
    9.
    发明授权
    Motion estimation with weighting prediction 有权
    运动估计与加权预测

    公开(公告)号：US07376186B2

    公开(公告)日：2008-05-20

    申请号：US10410479

    申请日：2003-04-09

    申请人： Jill MacDonald Boyce ,  Alan Jay Stein

    发明人： Jill MacDonald Boyce ,  Alan Jay Stein

    IPC分类号： H04N7/18

    CPC分类号： H04N19/577 ,  H04N19/105 ,  H04N19/149 ,  H04N19/176 ,  H04N19/192 ,  H04N19/196 ,  H04N19/197 ,  H04N19/46 ,  H04N19/61 ,  H04N19/90

    摘要： A video encoder and decoder are provided for encoding and decoding video signal data for an image block and a particular reference picture index to predict the image block, where the encoder includes a reference picture weighting factor selector having an output indicative of a weighting factor corresponding to the particular reference picture index, a multiplier in signal communication with the reference picture weighting factor selector for providing a weighted version of the reference picture, and a motion estimator in signal communication with the multiplier for providing motion vectors corresponding to the weighted version of the reference picture; and the corresponding decoder a reference picture weighting factor unit having an output for determining a weighting factor corresponding to the particular reference picture index.

    摘要翻译： 提供视频编码器和解码器，用于对图像块的视频信号数据和特定参考图像索引进行编码和解码以预测图像块，其中编码器包括参考图像加权因子选择器，该参考图像加权因子选择器具有指示对应于 特定参考图像索引，与用于提供参考图像的加权版本的参考图像加权因子选择器进行信号通信的乘法器，以及与乘法器进行信号通信的运动估计器，用于提供与参考的加权版本相对应的运动矢量 图片; 以及对应的解码器，具有用于确定对应于特定参考图像索引的加权因子的输出的参考图像加权因子单元。

    Method for reducing channel change times and synchronizing audio/video content during channel change
    10.
    发明授权
    Method for reducing channel change times and synchronizing audio/video content during channel change 有权
    用于在频道改变期间减少频道改变时间和同步音频/视频内容的方法

    公开(公告)号：US08458744B2

    公开(公告)日：2013-06-04

    申请号：US12312394

    申请日：2006-12-13

    申请人： Jiwang Dai ,  Alan Jay Stein

    发明人： Jiwang Dai ,  Alan Jay Stein

    IPC分类号： G06F3/00 ,  G06F13/00 ,  H04N5/445

    CPC分类号： H04N5/50 ,  H04N5/04 ,  H04N5/4401 ,  H04N21/23439 ,  H04N21/4307 ,  H04N21/4384 ,  H04N21/44016 ,  H04N21/6405

    摘要： A digital A/V apparatus provides reduced channel changes times and maintains synchronization between audio and video content during a channel change event. According to an exemplary embodiment, the digital A/V apparatus includes at least one signal receiver for receiving a first audio stream, a first video stream and a second video stream, wherein the first and second video streams represent the same program and the first video stream has at least one characteristic different from the second video stream; a first audio signal processor for processing the first audio stream to generate a first processed audio stream; a first video signal processor for processing the first video stream to generate a first processed video stream; a second video signal processor for processing the second video stream to generate a second processed video stream having a delay with respect to the first processed video stream; a first buffer for buffering the first processed audio stream to provide de-jittering; a renderer for rendering the first processed audio stream and the second processed video stream in response to a channel change command; a switch for switching from the second processed video stream to the first processed video stream after the renderer begins rendering the second processed video stream, and thereby causing the renderer to begin rendering the first processed video stream; and whereby synchronization between the first processed audio stream and the first processed video stream is maintained during a channel change event.

    摘要翻译： 数字A / V设备在频道改变事件期间提供减少的频道改变时间并且保持音频和视频内容之间的同步。 根据示例性实施例，数字A / V装置包括用于接收第一音频流，第一视频流和第二视频流的至少一个信号接收器，其中第一和第二视频流表示相同的节目，第一视频 流具有与第二视频流不同的至少一个特征; 第一音频信号处理器，用于处理第一音频流以产生第一处理音频流; 第一视频信号处理器，用于处理第一视频流以产生第一处理视频流; 第二视频信号处理器，用于处理第二视频流以产生具有相对于第一处理视频流的延迟的第二处理视频流; 用于缓冲第一处理音频流以提供去抖动的第一缓冲器; 用于响应于频道改变命令呈现第一处理音频流和第二处理视频流的渲染器; 在所述渲染器开始渲染所述第二处理视频流之后从所述第二处理视频流切换到所述第一处理视频流的开关，从而使所述渲染器开始渲染所述第一处理视频流; 并且由此在信道改变事件期间维持第一处理音频流和第一处理视频流之间的同步。