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    • 7. 发明申请
    • APPARATUS AND METHOD FOR IMAGE NOISE REDUCTION
    • 图像噪声减少的装置和方法
    • WO2009148262A3
    • 2011-04-28
    • PCT/KR2009002955
    • 2009-06-03
    • LG ELECTRONICS INCKIM KANG SOO
    • KIM KANG SOO
    • H04N5/21G06T5/00H04N5/911
    • H04N5/21G06T5/002G06T2207/10016
    • The present invention relates to an apparatus and method for reducing video noise, the apparatus comprising: a signal delay part for delaying an input video signal by a preset time interval and outputting an array of video delay signals; a pixel difference calculation part for calculating a pixel difference between the input video signal and the video delay signal and obtaining a weight to be applied to the pixel difference, using a non-linear function on the basis of the calculated pixel difference; an SNR estimation part for converting the input video signal into a frequency domain signal to calculate from the converted frequency domain signal a weight for each frequency and outputting an SNR parameter; and a pixel difference weight generation part for applying a weight range obtained from the pixel difference calculation part to an SNR weight outputted from the SNR estimation part so as to generate a weight to be given to a final pixel value for noise reduction. The present invention is advantageous in that the maximum value of a weight to be applied to a real pixel difference is restricted by the SNR parameter, and a final pixel compensatation value depening on the SNR parameter is dynamically applied to reduce video lag and to display high-frequency images more clearly.
    • 本发明涉及一种用于降低视频噪声的装置和方法,该装置包括:信号延迟部分,用于将输入视频信号延迟预设时间间隔并输出视频延迟信号阵列; 像素差分计算部分,用于基于所计算的像素差异,使用非线性函数来计算输入视频信号和视频延迟信号之间的像素差,并获得要应用于像素差的权重; SNR估计部分,用于将输入视频信号转换为频域信号,以从转换的频域信号计算每个频率的权重并输出SNR参数; 以及像素差分权重生成部,用于将从像素差计算部获得的权重范围应用于从SNR估计部输出的SNR权重,以产生要被赋予用于降噪的最终像素值的权重。 本发明的优点在于,应用于实像素差的权重的最大值被SNR参数限制,并且动态地应用依赖于SNR参数的最终像素补偿值以减少视频滞后并显示高 - 频率图像更清晰。
    • 9. 发明申请
    • IMAGE DISPLAY APPARATUS AND METHOD OF COMPENSATING FOR WHITE BALANCE
    • 图像显示装置和白平衡补偿方法
    • WO2009045068A2
    • 2009-04-09
    • PCT/KR2008/005823
    • 2008-10-02
    • LG ELECTRONICS INC.KIM, Kang SooLEE, Sung Yung
    • KIM, Kang SooLEE, Sung Yung
    • G09F9/30G02F1/133H04N9/73
    • H04N9/73G09G5/02G09G2320/0666G09G2360/144
    • An image display apparatus and a method of compensating for white balance are disclosed. The method of compensating for white balance of an image display apparatus includes reading a picture status mode (PSM) set in the image display apparatus, measuring the light amounts of RGB color signals from an external light source of the image display apparatus and detecting a color temperature of the external light source, calculating a difference between the detected color temperature of the external light source and a color temperature of the white balance of the set PSM, performing white balance gain compensation for correcting the color temperature of an input image according to the PSM using the calculated difference between the color temperatures, and displaying an image of which the white balance gain is compensated for. Accordingly, it is possible to correct a difference between color temperatures according to a PSM of an input image and an external light source in TV viewing conditions of various environments and maintain sharp white balance of an output image.
    • 公开了一种图像显示装置和补偿白平衡的方法。 补偿图像显示装置的白平衡的方法包括读取在图像显示装置中设置的图像状态模式(PSM),测量来自图像显示装置的外部光源的RGB颜色信号的光量并检测颜色 计算外部光源的检测色温与设定的PSM的白平衡的色温之差,进行白平衡增益补偿,以校正输入图像的色温 PSM使用计算出的色温之差,并显示补偿白平衡增益的图像。 因此,可以根据各种环境的TV观看条件下的输入图像和外部光源的PSM来校正色温之间的差异,并且保持输出图像的清晰的白平衡。