为了实现频谱交错PAL采用()方法选择副载波。 ["A、1/4行频间置","B、半行频间置","C、行频间置","D、4.43兆间置"]
在NTSC制中副载波的频率为() ["A、3.58MHz","B、4.25MHz","C、4.406MHz","D、4.43MHz"]
为了实现频谱交错,NTSC制采用()方法选择副载波 ["A、1/4行频间置","B、半行频间置","C、行频间置","D、3.58兆间置"]
在PAL制中色同步信号的初相位是() ["A、180°","B、±90°逐行摆动","C、±135°逐行摆动","D、±45°逐行摆动"]
氮的总平衡
氮的负平衡