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3.数字分量视频信号3 .3 .1 取样与量化大多数节目制作设备使用1 3 .5MHz时钟速率的 4∶ 2∶2取样。时钟速率要提高到1 8MHz时 ,1 6∶ 9可以给出与4∶ 3方式相同的水平分解力。如 3 .3 .1 .4所示。这里图 3 . 3 . 1 . 1给出62 5/50的模拟信号和数字信号的行定时。图 3 .3 .1 .
3. Digital Component Video Signals 3.1.1 Sampling and Quantification Most programming devices use a 4: 2: 2 sampling of a 13.5 MHz clock rate. When the clock rate is increased to 18 MHz, 1 6: 9 gives the same horizontal resolution as the 4: 3 method. As shown in 3 .3 .1 .4. Figure 3.1.1 shows the row timing of 62 5/50 analog and digital signals. Figure 3 .3 .1.