以下关于海明码的叙述中，正确的是（ ）。
- A.校验位与数据信息位混淆且随机分布
- B.数据信息位与校验位需要满足一定的位置关系
- C.需将所有校验位设置在所有数据信息位之后
- D.校验位的长度必须与数据信息位的长度相同
正确答案及解析
正确答案
解析
海明码是由贝尔实施室设计的，利用奇偶性来检查和纠错的校验方法。海明码的构成方法是在数据位之间的确定位置上插入k个校验位，通过扩大码距来实现检错和纠错。
数据位（n位）与校验位（k位），满足关系
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