基于高速D/A卡的复合视频信号发生器

Composite Video Signal Generator Using High-Speed D/A Converter

摘要:

提出了一种运用高速D/A卡产生复合视频信号的方法。以PAL制式为例介绍了复合视频信号的特点和技术要求,重点阐述了设计过程中的难点问题及解决方法,例如副载波相位连续性、图像的缩放和插值等问题。

Abstract:

One design method of composite video signal generator using high-speed D/A converter was proposed. A summarized review of composite video signal in case of PAL was provided. More attention was paid on difficulties in the design and corresponding solutions, such as continuity of the phase of sub carrier, image room and interpolating.