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    • 53. 发明授权
    • Method and system for modeling light
    • 光源建模方法及系统
    • US08466917B2
    • 2013-06-18
    • US12515340
    • 2006-11-20
    • Ana Belen BenitezDong-Qing ZhangJames Arthur Fancher
    • Ana Belen BenitezDong-Qing ZhangJames Arthur Fancher
    • G06T15/00
    • G06T15/506
    • A method and system for modeling light in time and space are provided. The method and system of the present disclosure collect light readings, e.g., on a motion picture set, at different positions and times to build a light model to be used for visual effects (VFX) compositing. The light model represents the light distribution across space and/or time for a predetermined physical space. Using the light model, the lighting can then be predicted or interpolated at intermediate or other positions and/or times for which no specific light readings were obtained. The light models can be used for rendering objects (e.g., natural or CG elements) in a scene as if they were in that space.
    • 提供了一种用于在时间和空间上对光进行建模的方法和系统。 本公开的方法和系统在不同的位置和时间收集例如运动图像集上的光读数,以构建要用于视觉效果(VFX)合成的光模型。 光模型表示预定物理空间的空间和/或时间的光分布。 使用光模型,然后可以在没有获得特定光读数的中间或其他位置和/或时间预测或内插照明。 光模型可用于在场景中渲染对象(例如,自然或CG元素),就像它们在该空间中一样。
    • 54. 发明申请
    • Method and Apparatus for Multimedia Queue Management
    • 多媒体队列管理方法与装置
    • US20130089107A1
    • 2013-04-11
    • US13253654
    • 2011-10-05
    • Zhu LiYong WangDong-Qing ZhangHong Heather Yu
    • Zhu LiYong WangDong-Qing ZhangHong Heather Yu
    • H04L12/56
    • H04L47/323H04L47/30H04L65/80H04N21/64738H04N21/64769
    • Methods and systems for a multimedia queue management solution that maintaining graceful Quality of Experience (QoE) degradation are provided. The method selects a frame from all weighted queues based on a gradient function indicating a network performance rate change and a distortion rate caused by the frame and its related frames in the queue, and dropping the selected frame and all its related frames, and continues to drop similarly chosen frame until a network performance rate change caused by the dropping frame and its related frames meets a predetermined performance metric. A frame gradient is a distortion rate divided by a network performance rate change caused by the frame and its related frames, and a distortion rate is based on a sum of each individual frame distortion rate when the frame and its related frames are replaced by some other frames derived from remaining frames based on a replacement method.
    • 提供了维护优雅的体验质量(QoE)降级的多媒体队列管理解决方案和方法。 该方法基于指示网络性能速率变化的梯度函数和由帧及其相关帧在队列中引起的失真率,并且丢弃所选帧及其所有相关帧,从所有加权队列中选择一帧,并继续 丢弃类似地选择的帧,直到由丢弃帧及其相关帧引起的网络性能速率变化满足预定的性能度量。 帧梯度是由帧及其相关帧引起的网络性能速率变化除以失真率,并且当帧和其相关帧被其他一些替换时,失真率基于每个单独的帧失真率的和 基于替换方法从剩余帧导出的帧。
    • 56. 发明申请
    • Methods and Apparatus for Reducing Vector Quantization Error Through Patch Shifting
    • 用于通过补片移位减少矢量量化误差的方法和装置
    • US20130028330A1
    • 2013-01-31
    • US13576848
    • 2011-02-01
    • Dong-Qing ZhangJoan LlachSitaram Bhagavathy
    • Dong-Qing ZhangJoan LlachSitaram Bhagavathy
    • H04N7/26
    • H04N19/105G06T1/00H04N19/139H04N19/14H04N19/59H04N19/593H04N19/94
    • Methods and apparatus are provided for reducing vector quantization error through patch shifting. A method generates, from an input video sequence, one of more high resolution replacement patches, the one or more high resolution replacement patches for replacing one or more low resolution patches during a reconstruction of the input video sequence. This generating step generates the one or more high resolution replacement patches using data corresponding to a patch spatial shifting process, the patch spatial shifting process for reducing jittery artifacts caused by a motion-induced vector quantization error in the one or more high resolution replacement patches, the data for at least deriving a patch size of the one or more high resolution replacement patches such that the one or more high resolution replacement patches are generated to have the patch size greater than a patch size of the one or more low resolution patches in order to be suitable for use in the patch spatial shifting process.
    • 提供了通过补片移位来减少矢量量化误差的方法和装置。 一种方法从输入视频序列生成更多高分辨率替换贴片之一,该一个或多个高分辨率替换贴片用于在重建输入视频序列期间替换一个或多个低分辨率贴片。 该生成步骤使用与贴片空间移位处理对应的数据来生成一个或多个高分辨率替换贴片,该贴片空间移位处理用于减少由一个或多个高分辨率替换贴片中的运动引起的矢量量化误差引起的抖动伪像, 所述数据用于至少导出所述一个或多个高分辨率替换补丁的补丁大小,使得生成所述一个或多个高分辨率替换补丁以使所述补丁大小大于所述一个或多个低分辨率补丁的补丁大小顺序 适用于贴片空间位移过程。