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公开(公告)号：US08811766B2
公开(公告)日：2014-08-19
申请号：US13332949
申请日：2011-12-21
申请人： Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Wei Yin Chiang
发明人： Anna Raffalli , Haiyun Wang , Lucas Hui , Patricia Wei Yin Chiang
CPC分类号： H04N19/00066 , H04N19/117 , H04N19/14 , H04N19/86
摘要： Systems and methods are disclosed for determining the perceptibility of noise in a block of images and/or video. The systems and methods may compute a mask value for the block using a block masking generator. The mask value may indicate the perceptibility of noise in the block. The mask value may be computed using a normalized activity value and/or a texture value for the block. The normalized activity value may indicate the relative activity in the block as compared to the activity in the image and/or video. The texture value may indicate the strength and/or number of edges in the block.
摘要翻译： 公开了用于确定图像和/或视频块中的噪声的感知性的系统和方法。 系统和方法可以使用块掩码生成器来计算块的掩码值。 掩模值可以指示块中的噪声的可感知性。 可以使用归一化活动值和/或块的纹理值来计算掩模值。 与图像和/或视频中的活动相比，归一化活动值可以指示块中的相对活动。 纹理值可以指示块中的边缘的强度和/或数量。
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公开(公告)号：US09326007B2
公开(公告)日：2016-04-26
申请号：US13293978
申请日：2011-11-10
申请人： Xiaoyun Deng , Patricia Wei Yin Chiang , Lucas Hui
发明人： Xiaoyun Deng , Patricia Wei Yin Chiang , Lucas Hui
IPC分类号： H04N7/26 , H04N19/86 , H04N19/139 , H04N19/176 , H04N19/117
CPC分类号： H04N19/86 , H04N19/117 , H04N19/139 , H04N19/176
摘要： Digital noise removal methods and systems for picture quality improvement on next generation high quality set-top-box and digital TV SOCs is disclosed with particular to a de-blocking method and system that is effective on on-grid and off-grid blocky artifacts generated by lossy video compression standards. Blocky artifacts are filtered by extracting motions vectors for a current pixel block, calculating off-grid positions based on the extracted motion vectors, and applying de-blocking filtering along the calculated off-grid positions. The methods and systems can further skip filtering on-grid blocky artifacts to be filtered by an on-grid de-blocking filter known in the art.
摘要翻译： 公开了用于下一代高质量机顶盒和数字电视SOC的图像质量改进的数字噪声消除方法和系统，特别涉及一种解除阻挡的方法和系统，其对生成的并网和离网块状伪影有效 通过有损视频压缩标准。 通过提取当前像素块的运动矢量，基于所提取的运动矢量计算离网位置，以及沿着所计算的离网位置应用解块滤波来对块状伪像进行滤波。 所述方法和系统可以进一步跳过通过本领域已知的并网去阻塞滤波器过滤网格块状伪影的过滤。
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公开(公告)号：US07176983B2
公开(公告)日：2007-02-13
申请号：US10850963
申请日：2004-05-20
IPC分类号： H04N5/21
CPC分类号： G06T5/003 , G06T5/20 , G06T7/13 , G06T2207/10016 , G06T2207/10024 , G06T2207/20012 , G06T2207/20192 , H04N5/142 , H04N5/21 , H04N9/77
摘要： A processor for enhancing an input luminance signal including: a circuit for calculating a chroma edge value associated with the input luminance signal; a circuit for measuring a luminance gradient associated with the input luminance signal; a peaking filter for processing the input luminance signal; a gain adjustment circuit having a gain function that is adjustable relative to the calculated chroma edge value, the gain adjustment circuit being operable to adjust the magnitude of the output of the peaking filter wherein: in a first range of luminance gradients, the output is an attenuated version of the input; in a second range of luminance gradients the output is directly proportional to the input; in a third range of luminance gradients, the output is inversely proportional to the input; wherein the enhanced luminance signal is the sum of the input and output of the peaking filter.
摘要翻译： 一种用于增强输入亮度信号的处理器，包括：用于计算与输入亮度信号相关联的色度边缘值的电路; 用于测量与输入亮度信号相关联的亮度梯度的电路; 用于处理输入亮度信号的峰值滤波器; 所述增益调整电路具有相对于所计算的色度边缘值可调节的增益函数，所述增益调整电路可操作以调整所述峰值滤波器的输出的幅度，其中：在亮度梯度的第一范围内，所述输出为 衰减版本的输入; 在第二个亮度梯度范围内，输出与输入成正比; 在第三个亮度梯度范围内，输出与输入成反比; 其中增强的亮度信号是峰值滤波器的输入和输出之和。
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公开(公告)号：US07406208B2
公开(公告)日：2008-07-29
申请号：US10847206
申请日：2004-05-17
CPC分类号： G06T5/003 , G06T2200/12 , G06T2207/20192
摘要： An edge enhancement system, including a selective edge controller for determining one or more properties of an edge of image data, and for generating one or more weighting factors on the basis of properties of the edge; and a scaling module for scaling an edge enhancement signal by the weighting factors to control the degree of edge enhancement. The image data may represent a still or moving (i.e., video) image. A max-min search circuit determines maximum and minimum turning points closest to the center of the data processing window and that are located on opposing sides of the window, to determine values and locations of maximum and minimum pixels of the edge. An edge-directed pre-filtering circuit reduces the amplification of edge fuzziness by smoothing close the edges vertical prior to enhancement. An aliasing protection circuit reduces the visibility of saw-tooth defects on predominantly horizontal diagonal edges.
摘要翻译： 一种边缘增强系统，包括用于确定图像数据的边缘的一个或多个属性的选择性边缘控制器，以及用于基于所述边缘的属性生成一个或多个加权因子; 以及缩放模块，用于通过加权因子缩放边缘增强信号以控制边缘增强的程度。 图像数据可以表示静止或移动（即，视频）图像。 最大最小搜索电路确定最接近数据处理窗口中心并且位于窗口相对侧的转折点，以确定边缘的最大和最小像素的值和位置。 边缘预滤波电路通过在增强之前平滑闭合边缘垂直来减少边缘模糊性的放大。 混叠保护电路降低了主要是水平对角线边缘的锯齿缺陷的可视性。
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5.发明授权Memory transfer controller and method of transfer control of video line data and macroblock data 有权存储器传输控制器和视频行数据和宏块数据的传输控制方法公开(公告)号：US09100653B2
公开(公告)日：2015-08-04
申请号：US11461611
申请日：2006-08-01
IPC分类号： H04N7/12 , H04N19/423 , H04N19/61
CPC分类号： H04N19/423 , H04N19/61
摘要： A method of transferring sets of video line data and macroblock data, includes the steps of determining a macroblock period and a video line period longer than the macroblock period, dividing each set of video line data to be transferred within the video line period into two or more portions according to the difference between the determined macroblock period and video line period, aligning a burst transfer of each of the portions of the divided set of video line data and each set of macroblock data to the macroblock period, and initiating the burst transfer of the sets of video line data and macroblock data at macroblock period intervals.
摘要翻译： 一种传送视频行数据和宏块数据集的方法包括以下步骤：确定宏块周期和比宏块周期长的视频行周期，将在视频行周期内传送的每组视频行数据划分成两个或 根据所确定的宏块周期和视频行周期之间的差异来更多部分，将分割的视频行数据集合的每个部分的突发传送与每个宏块数据集对齐到宏块周期，并且发起突发传送 在宏块周期间隔的视频行数据和宏块数据集合。
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公开(公告)号：US08432498B2
公开(公告)日：2013-04-30
申请号：US12908678
申请日：2010-10-20
IPC分类号： H04N7/12
CPC分类号： H04N9/646
摘要： An automatic frequency selection circuit includes a base filter for receiving a video input, a peaking filter for receiving the video input, a first energy computation unit coupled to an output of the base filter, a second energy computation unit coupled to an output of the peaking filter, an automatic frequency control unit to compare relative measured energies of the first and second energy computation units and to output a temporarily stable selected frequency for a targeted attenuation, and a frame delay feedback unit for receiving the temporarily stable selected frequency coupled to the peaking filter.
摘要翻译： 自动频率选择电路包括用于接收视频输入的基本滤波器，用于接收视频输入的峰化滤波器，耦合到基本滤波器的输出的第一能量计算单元，耦合到峰值输出的第二能量计算单元 滤波器，自动频率控制单元，用于比较第一和第二能量计算单元的相对测量能量并输出用于目标衰减的临时稳定的选定频率;以及帧延迟反馈单元，用于接收耦合到峰值的暂时稳定的选定频率 过滤。
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公开(公告)号：US20120098973A1
公开(公告)日：2012-04-26
申请号：US12908678
申请日：2010-10-20
IPC分类号： H04N17/00
CPC分类号： H04N9/646
摘要： An automatic frequency selection circuit includes a base filter for receiving a video input, a peaking filter for receiving the video input, a first energy computation unit coupled to an output of the base filter, a second energy computation unit coupled to an output of the peaking filter, an automatic frequency control unit to compare relative measured energies of the first and second energy computation units and to output a temporarily stable selected frequency for a targeted attenuation, and a frame delay feedback unit for receiving the temporarily stable selected frequency coupled to the peaking filter.
摘要翻译： 自动频率选择电路包括用于接收视频输入的基本滤波器，用于接收视频输入的峰化滤波器，耦合到基本滤波器的输出的第一能量计算单元，耦合到峰值输出的第二能量计算单元 滤波器，自动频率控制单元，用于比较第一和第二能量计算单元的相对测量能量并输出用于目标衰减的临时稳定的选定频率;以及帧延迟反馈单元，用于接收耦合到峰值的暂时稳定的选定频率 过滤。
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公开(公告)号：US08502894B2
公开(公告)日：2013-08-06
申请号：US12649746
申请日：2009-12-30
CPC分类号： H04N5/208
摘要： A system is disclosed for reducing artifacts in images and video, such as ringing or halo artifacts. The system may include an edge detector and a gain controller. The edge detector may create an edge image used by the gain controller to create a gain image, and the gain image may be used to reduce artifacts in an image. The gain controller may, for a current pixel in the edge image, compute the maximum value of the edge image over a window containing the current pixel. The gain controller may also perform averaging to determine a maximum edge value and a current edge value, and may also use a ratio of the current edge value and the maximum edge value to determine a gain to be applied to a pixel of an image.
摘要翻译： 公开了一种用于减少图像和视频中的伪影的系统，例如振铃或光晕伪影。 系统可以包括边缘检测器和增益控制器。 边缘检测器可以创建由增益控制器使用的边缘图像以产生增益图像，并且增益图像可以用于减少图像中的伪像。 对于边缘图像中的当前像素，增益控制器可以在包含当前像素的窗口上计算边缘图像的最大值。 增益控制器还可以执行平均以确定最大边缘值和当前边缘值，并且还可以使用当前边缘值和最大边缘值的比率来确定要施加到图像的像素的增益。
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公开(公告)号：US07953286B2
公开(公告)日：2011-05-31
申请号：US11890606
申请日：2007-08-07
CPC分类号： H04N5/20 , G06T5/009 , G06T5/40 , G06T2207/10016
摘要： In a process for enhancing contrast of an image having pixels in different brightness intensities, a histogram in discrete bins is generated. Each bin represents a pixel population of at least one pixel brightness intensity. A peak and a peak region of the histogram is then identified, wherein the peak region is a range of discrete bins around the peak. An average pixel population within the peak region is computed, and the pixel populations of the discrete bins within the peak region that exceeds the average pixel population are distributed. A transfer curve for mapping onto the image is then generated. The process can be used in an image processor for enhancing contrast of an image having pixel. Still further, a display having a receiver and a screen can include the foregoing image processor.
摘要翻译： 在用于增强具有不同亮度强度的像素的图像的对比度的处理中，生成离散区域中的直方图。 每个bin表示至少一个像素亮度强度的像素总数。 然后识别直方图的峰值和峰值区域，其中峰值区域是峰值周围的离散区域的范围。 计算峰值区域内的平均像素总数，并且分布超过平均像素总数的峰值区域内的离散区域的像素群体。 然后生成用于映射到图像上的传输曲线。 该处理可以用于图像处理器中以增强具有像素的图像的对比度。 此外，具有接收器和屏幕的显示器可以包括前述图像处理器。
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公开(公告)号：US07193659B2
公开(公告)日：2007-03-20
申请号：US10847205
申请日：2004-05-17
摘要： A method of color saturation compensation in a video signal is disclosed. The method includes the steps of: processing a luminance signal component of the video signal; determining whether the processing of the luminance signal results in a change in chrominance saturation; if the step of determining reveals that the chrominance saturation has changed, applying a chrominance compensation signal to the chrominance signals to counteract the effects of chrominance saturation, wherein the step of applying a compensation signal include the steps of: generating a compensation signal which is dependent on hue and luminance ratio (output luminance signal/input luminance signal). Apparatus for performing the method is also disclosed.
摘要翻译： 公开了一种视频信号中色彩饱和补偿的方法。 该方法包括以下步骤：处理视频信号的亮度信号分量; 确定亮度信号的处理是否导致色度饱和度的变化; 如果确定步骤显示色度饱和度已经改变，则将色度补偿信号施加到色度信号以抵消色度饱和度的影响，其中施加补偿信号的步骤包括以下步骤：产生依赖的补偿信号 色相和亮度比（输出亮度信号/输入亮度信号）。 还公开了用于执行该方法的装置。
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