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文章叙述CATV—PIP系统原理;深入分析PIP存贮器中读与写操作矛盾问题、主子画面奇偶场一致问题,并提出了解决方法;文中也论述了子画面时分制插入多个主画面的原理、关键问题及其解决方法,该系统已研制成功并投入使用。
The article describes the principle of CATV-PIP system; in-depth analysis of the PIP memory read and write the contradiction between the problem, the main picture odd and even fields consistent problem and put forward the solution; the paper also discusses the sub-picture the principle of time-division insert multiple main screen , The key problems and their solutions, the system has been successfully developed and put into use.