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    • 10. 发明授权
    • Video signal processing circuit, viewfinder apparatus, television camera, and image monitor apparatus
    • 视频信号处理电路,取景器装置,电视摄像机和图像监视装置
    • US07113211B1
    • 2006-09-26
    • US09516670
    • 2000-03-01
    • Kenichi SeinoMitsuo KamikoTomoyasu KatsuyamaYoshihiro DateNaoki Hagiwara
    • Kenichi SeinoMitsuo KamikoTomoyasu KatsuyamaYoshihiro DateNaoki Hagiwara
    • H04N9/64H04N5/208H04N5/21
    • H04N9/646H04N5/208H04N5/23293
    • A video signal processing circuit, which performs contour adjustment by means of digital signal processing, is applicable to a viewfinder apparatus for a television camera and an image monitor apparatus, which can be operated both in an NTSC/PAL system and an HDTV system. The video signal processing circuit includes a contour-adjusting circuit for performing contour adjustment by peaking R, G, and B signals or by peaking a Y signal in an HDTV system and for outputting at least one adjusted signal; an inverse matrix transforming circuit for separating, by performing inverse matrix transformation, the R, G, and B signals from the adjusted Y signal, a Pr signal, and a Pb signal and for outputting the separated R, G, and B signals; and a selecting circuit for selecting, in accordance with the type of input video signals, either the R, G, and B signals in which the contour adjustment is performed or the Y signal, in which the contour adjustment is performed, and the Pr signal and the Pb signal, in which the contour adjustment is not performed.
    • 通过数字信号处理执行轮廓调整的视频信号处理电路可应用于可以在NTSC / PAL系统和HDTV系统中操作的电视摄像机和图像监视装置的取景器装置。 视频信号处理电路包括:轮廓调整电路,用于通过使R,G和B信号达到峰值或通过在HDTV系统中对Y信号进行峰化并输出至少一个经调整的信号来执行轮廓调整; 一个逆矩阵变换电路,用于通过从调整的Y信号,Pr信号和Pb信号中进行逆矩阵变换来分离R,G和B信号,并输出分离的R,G和B信号; 以及选择电路,用于根据输入视频信号的类型,选择执行轮廓调整的R,G和B信号,或执行轮廓调整的Y信号和Pr信号 和不进行轮廓调整的Pb信号。