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公开(公告)号：US06366327B1
公开(公告)日：2002-04-02
申请号：US09126629
申请日：1998-07-30
申请人： Karl H. Renner , Weider Peter Chang
发明人： Karl H. Renner , Weider Peter Chang
IPC分类号： H04N514
摘要： A technique for detecting three modes of video input signal and outputting a vertical sync signal based on the input signal. In a first mode, a standard video signal is received and a line counter is used to decode and output the vertical sync. In a second mode where a non-standard signal is received, line counter cannot be used, but a vertical sync is detected and output. In a third mode, no video input signal is received, yet a vertical sync is output in free-running mode so that a blank screen is displayed.
摘要翻译： 一种用于检测视频输入信号的三种模式并基于输入信号输出垂直同步信号的技术。 在第一模式中，接收标准视频信号，并且使用行计数器来解码并输出垂直同步。 在接收到非标准信号的第二模式中，不能使用行计数器，而是检测并输出垂直同步信号。 在第三模式中，没有接收到视频输入信号，但是以自由运行模式输出垂直同步，从而显示空白屏幕。
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公开(公告)号：US07511769B2
公开(公告)日：2009-03-31
申请号：US11109290
申请日：2005-04-19
摘要： A system to reduce noise includes a noise measurement device that provides a measure of noise associated with a digital input video signal. A noise reduction filter provides a noise-reduced digital output video signal corresponding to the luma and chroma of the digital input video signal. The noise reduction filter has a parameter that varies on a pixel basis for the component of the digital input video signal as a function of the measure of noise. The range and sensitivity of the noise reduction can be user programmable.
摘要翻译： 降低噪声的系统包括提供与数字输入视频信号相关联的噪声测量的噪声测量装置。 噪声降低滤波器提供对应于数字输入视频信号的亮度和色度的噪声降低的数字输出视频信号。 噪声降低滤波器具有作为噪声测量的函数的数字输入视频信号的分量基于像素变化的参数。 降噪的范围和灵敏度可以由用户编程。
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公开(公告)号：US07173668B2
公开(公告)日：2007-02-06
申请号：US10623232
申请日：2003-07-18
申请人： Karl Renner , Walter Heinrich Demmer , Jason M. Meiners , Weider Peter Chang , Airong Amy Zhang
发明人： Karl Renner , Walter Heinrich Demmer , Jason M. Meiners , Weider Peter Chang , Airong Amy Zhang
CPC分类号： H04N5/10
摘要： The present invention discloses a horizontal sync detector circuit (10) comprising a filter portion (12), an equilibrium accumulator portion (14) coupled to the filter portion (12), a horizontal sync detector portion (16) coupled to the filter portion (12) and to the equilibrium accumulator portion (14), and an output logic portion (18) coupled to the horizontal sync detector portion (16), the output logic portion (18) adapted to produce a phase error (116) based on a combination of a coarse phase error (108) and a fine phase error (112).
摘要翻译： 本发明公开了一种包括滤波器部分（12），耦合到滤波器部分（12）的平衡累加器部分（14）的水平同步检测器电路（10），耦合到滤波器部分的水平同步检测器部分 12）和平衡累加器部分（14）以及耦合到水平同步检测器部分（16）的输出逻辑部分（18），输出逻辑部分（18）适于产生基于 粗相位误差（108）和精细相位误差（112）的组合。
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公开(公告)号：US20120008834A1
公开(公告)日：2012-01-12
申请号：US13180500
申请日：2011-07-11
IPC分类号： G06K9/00
CPC分类号： H04N5/144
摘要： A method for motion detection is provided that includes determining a first motion measure for a pixel based on differences between first neighboring pixels of the pixel, determining a detail measure for the pixel, wherein the detail measure is indicative of an amount of detail in second neighboring pixels of the pixel, adapting a first coring threshold and a first gain of a first transfer function based on the detail measure, and using the adapted first transfer function to map the first motion measure to a first motion parameter.
摘要翻译： 提供了一种用于运动检测的方法，其包括基于所述像素的第一相邻像素之间的差异来确定像素的第一运动度量，确定所述像素的细节度量，其中所述细节度量指示第二相邻的细节量 像素的像素，基于细节度量来适配第一取芯阈值和第一传递函数的第一增益，以及使用适配的第一传递函数将第一运动测量映射到第一运动参数。
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公开(公告)号：US06459457B1
公开(公告)日：2002-10-01
申请号：US09467953
申请日：1999-12-21
申请人： Karl Renner , Weider Peter Chang , Walter Demmer
发明人： Karl Renner , Weider Peter Chang , Walter Demmer
IPC分类号： H04N978
摘要： A color comb filter (46), video decoder (40) and method for separating chroma (U,V) and luma (Y) signals from a composite video signal (41). The comb filter (46) includes circuitry (48) for generating color filter selections for filtering a chroma video signal (41) and control logic (62) for determining the filter selections based on color boundary properties of the chroma video signal (U,V). The video decoder (40) includes a comb filter (46), a demodulator (42), low pass filter (44), a remodulator (48) and a subtractor (50). The filtered, remodulated chroma signal (Uout,Vout) is subtracted from the composite video signal (41) to produce a luma signal absent hanging dots and false colors.
摘要翻译： 彩色梳状滤波器（46），视频解码器（40）和用于从复合视频信号（41）分离色度（U，V）和亮度（Y）信号的方法。 梳状滤波器（46）包括用于产生用于滤除色度视频信号（41）的滤色器选择的电路（48）和用于基于色度视频信号（U，V）的颜色边界属性确定滤波器选择的控制逻辑 ）。 视频解码器（40）包括梳状滤波器（46），解调器（42），低通滤波器（44），再调制器（48）和减法器（50）。 从复合视频信号（41）中减去经滤波的重新调制的色度信号（Uout，Vout）以产生没有悬点和假色的亮度信号。
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公开(公告)号：US09049408B2
公开(公告)日：2015-06-02
申请号：US11849456
申请日：2007-09-04
CPC分类号： H04N9/643 , G09G5/02 , G09G2320/0242 , H04N9/64 , H04N9/646 , H04N9/67 , H04N9/68 , H04N9/73
摘要： A method of color processing determines whether a pixel color is within at least one range of predetermined colors corresponding to a viewer expected color. If so, the method altering the pixel color to better approximate the viewer expected color. For detection of skin tones determining whether the pixel color is within a range of predetermined colors includes discounting an illuminant of the pixel color. The viewer expected colors are preferably skin tone, grass green and sky blue. The saturation level of grass green and sky blue are enhanced and that of skin tones are suppressed. The saturation s is limited based upon lightness J and hue h to convert to an allowable RGB color format range.
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公开(公告)号：US08582032B2
公开(公告)日：2013-11-12
申请号：US11852215
申请日：2007-09-07
申请人： Fan Zhai , Weider Peter Chang
发明人： Fan Zhai , Weider Peter Chang
CPC分类号： G06T3/4084 , G06T7/254 , H04N5/144 , H04N7/012 , H04N7/0135 , H04N7/0137 , H04N7/0142
摘要： Motion detection in interlaced video fields, as useful in de-interlacing, includes spatial-temporal maximum filtering, temporal IIR filtering dependent upon spatial-temporal variance, and spatial variance dependent moving-still interpolation blending factor.
摘要翻译： 隔行扫描视频场中的运动检测对去隔行有用，包括空间 - 时间最大滤波，取决于空间 - 时间方差的时间IIR滤波以及空间方差依赖移动静止插值混合因子。
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8.发明申请Apparatus and Method for Black Bar Detection In Digital TVs and Set-Top Boxes 有权数字电视和机顶盒中黑条检测的装置和方法公开(公告)号：US20130100349A1
公开(公告)日：2013-04-25
申请号：US12973241
申请日：2010-12-20
申请人： Paul M. Look , Masaki Kato , Weider Peter Chang
发明人： Paul M. Look , Masaki Kato , Weider Peter Chang
IPC分类号： H04N5/44
CPC分类号： H04N5/44 , H04N21/42653 , H04N21/44008 , H04N21/440272
摘要： This invention is a preprocessor apparatus and method algorithm facilitating black bar detection in video frames or fields. The preprocessing marks a sharp discontinuity between pixels a predetermined distance apart on each line. On first detection of this discontinuity the location and pixel value is stored. The location and pixel value is also stored for the last discontinuity in the line. This data enables software to detect top horizontal bars, bottom horizontal bars, left vertical bars and right vertical bars.
摘要翻译： 本发明是一种促进视频帧或场中的黑条检测的预处理装置和方法。 预处理标记在每条线上间隔预定距离的像素之间的尖锐的不连续性。 在首次检测到该不连续性时，存储位置和像素值。 位置和像素值也存储在行中的最后一个不连续点。 该数据使软件能够检测顶部水平条，底部水平条，左垂直条和右垂直条。
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公开(公告)号：US07443454B2
公开(公告)日：2008-10-28
申请号：US11240718
申请日：2005-10-01
CPC分类号： H04N5/144
摘要： A method for treating inter-frame motion in a series of consecutive signal frames of a composite video signal includes the steps of, for an evaluation pixel position in each frame of a test frame-set including three successive signal frames: (a) determining whether there is at least a predetermined difference in chroma component or in luma component signals at the evaluation pixel; (b) if in step (a) there is not a predetermined difference in chroma component signals or in luma component signals, determining whether a first and third frame of the test frame-set are substantially identical; (c) determining whether at least a first predetermined number of the luma or chroma component signals in the test frame-set present at least one false color; and (d) determining whether at least a second predetermined number of high frequency luma component signals exist in the test frame-set.
摘要翻译： 一种用于处理复合视频信号的一系列连续信号帧中的帧间运动的方法包括以下步骤：对于包括三个连续信号帧的测试帧集合的每个帧中的评估像素位置：（a）确定是否 评估像素处的色度分量或亮度分量信号中至少存在预定的差异; （b）如果在步骤（a）中色度分量信号或亮度分量信号中没有预定的差异，则确定测试帧组的第一和第三帧是否基本相同; （c）确定测试帧组中至少第一预定数量的亮度或色度分量信号是否存在至少一种假色; 和（d）确定在测试帧组中是否存在至少第二预定数量的高频亮度分量信号。
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10.发明授权Automatic color saturation control in video decoder using recursive algorithm 有权使用递归算法在视频解码器中进行自动色彩饱和度控制公开(公告)号：US06188788B1
公开(公告)日：2001-02-13
申请号：US09196825
申请日：1998-11-20
申请人： Karl Renner , Weider Peter Chang
发明人： Karl Renner , Weider Peter Chang
IPC分类号： G06K900
CPC分类号： H04N9/68 , A61K2039/5254 , A61K2039/5256
摘要： A method for automatic color gain control utilizes a plurality of process blocks which compare the measured burst amplitude with an ideal burst amplitude, and then generate necessary scaling factors to automatically control the gain. Each of the process blocks utilizes recursive relationships for accumulating values, which recursive relationships require no multiplications but, rather, require only additions and/or subtractions, which additions and/or subtractions require merely an adder with a change of sign. A scale value is generated which represents the ratio of the measure to ideal burst amplitude value, which is then utilized to generate Cr and Cb in a YCrCb digitized format. This is utilized to scale the U and the V values in a YUV digitized format.
摘要翻译： 用于自动色彩增益控制的方法利用多个处理块，将多个处理块与测量的突发幅度与理想的突发幅度进行比较，然后产生必要的缩放因子以自动控制增益。 每个进程块利用用于累加值的递归关系，递归关系不需要乘法，而是仅需要加法和/或减法，这些加法和/或减法仅需要具有符号变化的加法器。 产生一个比例值，其表示测量与理想脉冲串幅度值的比率，然后用于产生YCrCb数字化格式的Cr和Cb。 这用于以YUV数字化格式缩放U值和V值。
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