有些客户需要修改视频的亮度与色度信号时延差的值，方法如下：
MS_BOOL tvvideo_SetDCOutputTiming(EN_MANUAL_TV_FORMAT eTVFormat, MS_BOOL bForceUpdate)
{
......
//-----------------------video cl
delay----------------------------
//0x0068 : normal value
//0x0008 : delay <= 30ns
//0x0049 : delay >= 30ns
*(volatile MS_U16*)(0xBF000000+(0x103E00<<1)+(0x03 <<2)) |= 0x60;
If(eTVFormat == EN_TV_FORMAT_PAL)
{
*(volatile MS_U16*)(0xBF000000+(0x103E00<<1)+(0x03 <<2))=0x0008;
}
}
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