3. Definition
• A character encoding system • 简而言之,字符编码就是
consists of a code that pairs 将字符通过编码转换成另
each character from a given
repertoire with something
外一种表现形式,可能是
else, such as a sequence of 自然数的序列,八位组,
natural numbers, octets or 电子脉冲等
electrical pulses, in order to – 从上面的定义看,摩斯码,
facilitate the transmission of 电报码也是字符编码的一种
data (generally numbers 方式
and/or text) through – 当然我们一般说的字符编码
telecommunication networks 实际上是以八位组的方式编
or storage of text in 码,使用计算机进行显示,
computers. 存储和传输
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4. Common Character Encodings
• 常见的计算机字符编码可以分为3大类
• ASCII及其扩展编码
– ASCII
– ISO 8859 1~10 13 ~16(aka Latin编码)
– ISO 8859 11 Thai
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