UC知道4B/5B计算机英语翻译
来源：百度知道 编辑：UC知道 时间：2024/06/02 18:54:58
A Simple Intensity Modulation Encoding is rejected because it does not provide synchronization; a string of 1s or 0s would have no transitions
The 4B/5B code is chosen over Manchester code because it is more efficient (80% vs. 50%)
The 4B/5B code is further encoded using NRZI so that the resulting differential encoding will improve reception reliability
NRZI (NonReturn To Zero Inverted)
1: A transition at the beginning of the bit interval
0: No transition at the beginning of the bit interval
The specific codes chosen for the encoding of the 16 four-bit data patterns guarantee no more than three zeros in a row. This provides for adequate synchronization
The 4B/5B code is chosen over Manchester code because it is more efficient (80% vs. 50%)
The 4B/5B code is further encoded using NRZI so that the resulting differential encoding will improve reception reliability
NRZI (NonReturn To Zero Inverted)
1: A transition at the beginning of the bit interval
0: No transition at the beginning of the bit interval
The specific codes chosen for the encoding of the 16 four-bit data patterns guarantee no more than three zeros in a row. This provides for adequate synchronization
一个简单的强度调制编码是拒绝，因为它并没有提供同步;一连串的1s的或0不会有过渡该4b/5b代码是选择超过曼彻斯特码，因为它是更有效率（ 80 ％比50 ％ ） 4B条/第5 B代码是进一步编码使用nrzi ，使所产生的差分编码将改善接收的可靠性nrzi （ nonreturn零倒置）
1 ： 1的过渡在开始的位间隔0 ：没有过渡，在开始的位间隔的具体守则选择的编码16 4位数据模式，保证不超过三个零，在一排。这提供了足够的同步