请高手帮忙讲解一下下面一段话

&nbsp;&nbsp;&nbsp;&nbsp;以下是S3C44B0X中IIS接口部分的“SAMPLING&nbsp;FREQUENCY&nbsp;AND&nbsp;MASTER&nbsp;CLOCK”部分<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;Master&nbsp;clock&nbsp;frequency(MCLK)&nbsp;can&nbsp;be&nbsp;selected&nbsp;by&nbsp;sampling&nbsp;frequency&nbsp;as&nbsp;shown&nbsp;in&nbsp;Table&nbsp;17-1.&nbsp;Because&nbsp;MCLK&nbsp;is<br />made&nbsp;by&nbsp;IIS&nbsp;prescaler,&nbsp;the&nbsp;prescaler&nbsp;value&nbsp;and&nbsp;MCLK&nbsp;type(256&nbsp;or&nbsp;384fs)&nbsp;should&nbsp;be&nbsp;determined&nbsp;properly.&nbsp;Serial&nbsp;bit<br />clock&nbsp;frequency&nbsp;type(16/32/48fs)&nbsp;can&nbsp;be&nbsp;selected&nbsp;by&nbsp;the&nbsp;serial&nbsp;bit&nbsp;per&nbsp;channel&nbsp;and&nbsp;MCLK&nbsp;as&nbsp;shown&nbsp;in&nbsp;Table&nbsp;17-2.<br />

fs是什么意思啊，表中各项的对应关系是怎样的？

<br />输入信号首先以n倍于采样频率的过采样进入转换器，这样可以大大减轻对输入端抗混迭滤波器的性能要求。