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1. 发明申请

US20050162561A1 Video signal processing circuit and video signal processing method 失效
标题翻译：视频信号处理电路和视频信号处理方法
公开(公告)号：US20050162561A1
公开(公告)日：2005-07-28
申请号：US10511733
申请日：2004-02-09
申请人： Takatomo Nagamine , Takahiko Tamura , Jun Ushima
发明人： Takatomo Nagamine , Takahiko Tamura , Jun Ushima
IPC分类号： H04N9/44 , H04N9/64 , H04N9/66
CPC分类号： H04N9/44 , H04N9/642
摘要： When an A/D-converted composite video signal is directly outputted while a system clock frequency is switched so as to execute the determination of a signal system, a digital chroma demodulation system prevents the images displayed by the composite video signals from distorting in accordance with switching of frequency of system clock. As for a frequency m (=fsc×n) of system clock synchronizing with a color burst signal, a frequency m of system clock between systems is set to fall in a predetermined range by changing a coefficient n in accordance with a system (a color bust signal frequency). Thus, since a composite video signal is A/D-converted in accordance with a substantially constant sampling frequency, the sampling condition such as a sampling frequency and a sampling point is not greatly changed.
摘要翻译：当在切换系统时钟频率的同时直接输出A / D转换的复合视频信号以执行信号系统的确定时，数字色度解调系统可以防止由复合视频信号显示的图像根据切换系统时钟的频率。对于与色同步信号同步的系统时钟的频率m（= fscxn），系统之间的系统时钟的频率m通过根据系统（颜色猝发信号）改变系数n而被设定为在预定范围内频率）。因此，由于复合视频信号根据基本恒定的采样频率进行A / D转换，所以采样频率和采样点等采样条件不会发生很大变化。

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