数据比较：您可以在使用叠加功能的同时滚动、放大图像和设置焦点。

Data compare: You can simultaneously scroll, enlarge the images and set focus while using the overlay functionality.

youdao

本文设计并实现了基于视频格式转换芯片的OSD系统，实现包括I2C串行通信，数据通路和OSD图像与视频叠加的功能。

In the paper, a design of OSD system based on video format convert chip is introduced, including the realization of I2C communication, data-pass and overlap of image and video.

youdao

该方案将被叠加的字符或图像数据保存在FPGA内部的ROM中，由内部逻辑控制电路产生点阵时序，控制视频通道切换开关，完成叠加功能。

The data of overlapped characters and pictures are stored in the ROM of FPGA, The Times are generated by FPGA inner logic circuit to control the switch of TV channels to finish the overlapping work.

youdao