介绍了两种常用的红外遥控信号的编码方法：脉冲占空比编码调制，脉冲宽度编码调制。

Introduces two usual remote control signal encoding methods: pulse width modulation, pulse space ratio modulation.

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需要随机访问文档特定位置的应用程序使用ucs2或utf - 32这类固定宽度的编码可能操作起来更快。

Applications that require random access to specific indexes within a document may operate more quickly when using a fixed-width encoding such as UCS2 or UTF-32.

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基2系统有时会使用很长的编码消息或位宽度，于是程序员想出了一个缩短此编码的方法，这种方法称之为基于十六进制系统(图2)。

The base-2 system makes for very long encoded messages or bit width, so programmers came up with a way to shorten this encoding based on the hexadecimal system (Fig. 2).

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