An optimized design scheme of the DTV STB was proposed based on the analysis of the composition principle of it.

分析其组成原理的基础上，提出了数字电视机顶盒的一种优化设计方案。

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Set Top Box (STB) receives and transforms digital TV signals into the signals which analog TV sets can display. It's an important transition product of DTV System.

机顶盒用于数字电视系统中将数字信号转变成模拟电视可以接收的信号，它是数字电视的过渡型产品。

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