基本概念
像素时钟
英文
A pixel clock, also known as a dot clock, is a term commonly used in computer graphics and video display systems. It refers to the frequency at which pixels are displayed on a screen or monitor. The pixel clock determines the speed at which the graphics card sends video signals to the display device, and it is measured in megahertz (MHz) or gigahertz (GHz).
白话文
一秒钟可以处理像素总和,单位MHz
以VIC97为例
时钟频率为594.000MHz,它等于4400(Htotal) * 2250(Vtotal) * 60(V Freq)。注意到这里VIC97的分辨率是3840(Hactive) * 2160(Vactive),但计算用的的是Htotal和Vtotal。这是因为显示器回头需要时间。
位深(Color Bit Depth)
常见是8/10/12/16。一个像素由三个颜色分量组成,位深对应于每个分量的位宽。例如,对于RGB颜色空间像素,三个分量分别为R,G和B