A distinguishing feature of the system is that it is not based on special video overlap chip that is common in this field, but USES DSP and CPLD to finish overlap functions.
系统主要特点是并非基于通常所采用的专用的视频叠加芯片，而是通过DSP和CPLD来实现视频叠加的功能。
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.
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.
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。
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