The key data and working state can be strikingly displayed on the monitor by superimposing some characters upon a video picture.Therefore, the technology of video character display is widely used.

• 在视频图像上实时叠加字符，可以及时将关键的数据和工作状态显示出来，既醒目又直观，因此视频字符显示技术得到了广泛的应用。