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本文提出了一种用于储存用户预定义分级控制级别信息的有效方法，该方法以不多的存储空间作代价换取了软件对分级控制的处理的大大简化。同时，本文也对ＡＴＳＣ数字电视分级控制的软件实现方法进行了讨论。
In this paper, an effective method for storing user-defined hierarchical control level information is proposed, which greatly simplifies the process of hierarchical control by software with less storage space. At the same time, this article also discusses the software implementation of ATSC digital television hierarchical control.