发明名称 |
Video signal processing circuit and video signal processing method |
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 (=fscxn) 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.
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申请公布号 |
US2005162561(A1) |
申请公布日期 |
2005.07.28 |
申请号 |
US20040511733 |
申请日期 |
2004.10.18 |
申请人 |
NAGAMINE TAKATOMO;TAMURA TAKAHIKO;USHIMA JUN |
发明人 |
NAGAMINE TAKATOMO;TAMURA TAKAHIKO;USHIMA JUN |
分类号 |
H04N9/44;H04N9/64;(IPC1-7):H04N9/66 |
主分类号 |
H04N9/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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