📄 windows环境下的麦克风录音系统(1).htm
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<td align="center" height=32 style="font-size: 12pt;color: #FF6600;">Windows环境下的麦克风录音系统(1)</td>
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<td align="center" height=25 bgcolor=#F7F7F7>作者：佚名 来源：不详 发布时间：25/09/2006 19:47:27 发布人：admin</td>
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<div id="NewaspContentLabel" style="display:block;padding:0px 10px;" class="ContentFont"><FONT id=font_word style="FONT-SIZE: 14px; FONT-FAMILY: 宋体, Verdana, Arial, Helvetica, sans-serif"><P class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-outline-level: 1"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 22pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 黑体"><a target="_blank" href="http://www.malegebide.com" class="wordstyle">Windows</a></SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN lang=ZH-CN style="FONT-SIZE: 22pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">环境下的麦克风录音系统</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 22pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 22pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"> <o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN lang=ZH-CN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">简介</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana"> 这是我很早以前的大学毕业设计,忽然间找到贴出来以纪念自己的纯真年代...但是因为CSDN不给面子所以导致短短的一篇文章贴了足足7次..他老提时说文章超过了64K,老大,拜托,那是算上了里面的图片大小吧...:-(</SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana"> 本文简单介绍了声卡的工作原理</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">录音的原理以及数字音频的基本知识并且利用</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体"><a target="_blank" href="http://www.malegebide.com" class="wordstyle">Windows</a></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">提供的</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">Waveform Aduio APIs</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">以及</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">Multimedia File I/O APIs</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">实现一个</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体"><a target="_blank" href="http://www.malegebide.com" class="wordstyle">Windows</a></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">环境下的麦克风录音以及将录音文件保存成</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">.wav</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">文件的简单系统</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">.<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"> <o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN lang=ZH-CN style="FONT-SIZE: 16pt; 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FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">麦克风</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">录音</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">波形文件</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-weight: bold; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,VC6++<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-FAMILY: 新宋体; mso-bidi-font-weight: bold; mso-fareast-language: ZH-CN"><FONT size=3> <o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">要深入的了解麦克风录音的实现我们必须了解声卡的工作原理</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">,<SPAN lang=ZH-CN>麦克风录音的原理以及了解相关的编程接口</SPAN>,<SPAN lang=ZH-CN>下面我们将慢慢道来</SPAN>…</SPAN><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"> <o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">1.</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN lang=ZH-CN style="FONT-FAMILY: 黑体; mso-fareast-language: ZH-CN"><FONT size=3>声卡的工作原理</FONT></SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"> <o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 26.25pt"><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN"> <o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 26.25pt"><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">声卡的工作原理其实很简单</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">,<SPAN lang=ZH-CN>我们知道</SPAN>,<SPAN lang=ZH-CN>麦克风和喇叭所用的都是模拟信号</SPAN>,<SPAN lang=ZH-CN>而<a target="_blank" href="http://www.malegebide.com" class="wordstyle">电脑</a>所能处理的都是数字信号</SPAN>,<SPAN lang=ZH-CN>两者不能混用</SPAN>,<SPAN lang=ZH-CN>声卡的作用就是实现两者的转换。<p id="mkowkwmhgliqqckt">的~=&6网z提k`{网^网网业</p><p id="gpmkjlgspttoddnkdwt">^供网J的]F网'教(Yd理育管&+.</p><font id="ojikudkvhgkhto">r7`b_1垠"管HL网dA</font>从结构上分</SPAN>,<SPAN lang=ZH-CN>声卡可分为模数转换电路和数模转换电路两部分</SPAN>,<SPAN lang=ZH-CN>模数转换电路负责将麦克风等声音输入设备采到的模拟声音信号转换为<a target="_blank" href="http://www.malegebide.com" class="wordstyle">电脑</a>能处理的数字信号</SPAN>,<SPAN lang=ZH-CN>而数模转换电路负责将<a target="_blank" href="http://www.malegebide.com" class="wordstyle">电脑</a>使用的数字声音信号转换为喇叭等设备能使用的模拟信号</SPAN>,<SPAN lang=ZH-CN>就这么简单</SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">。</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 26.25pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black"><?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype id=_x0000_t75 coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path><o:lock v:ext="edit" aspectratio="t"></o:lock></v:shapetype><v:shape id=_x0000_i1025 style="WIDTH: 332.25pt; HEIGHT: 139.5pt" type="#_x0000_t75" alt=""><img src="http://www.tongyi.net:80/Develop/ArticleImages/25/25172/CSDN_Dev_Image_2004-3-31505260.gif" o:href="http://www.5inet.net/Develop/CPP/file:///E:/documents/My%20Documents/microphone%20record/声卡工作原理_files/7.png" onload="return imgzoom(this,550)"></v:shape><o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 26.25pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">图</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN">1<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 26.25pt"><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">上图就是一块典型的声卡</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: Verdana; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">Mic</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">插口</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">用于连接麦克风</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: black; FONT-FAMILY: 新宋体; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">通过它可以录制外界的声音。</SPAN><SPAN style="FONT-SIZE: 11pt; COLOR: black; mso-bidi-font-size: 9.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 新宋体"><o:p></o:p></SPAN></P><P style="LINE-HEIGHT: 18pt"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">2.</SPAN></B><FONT size=3><B style="mso-bidi-font-weight: normal"><SPAN lang=ZH-CN style="FONT-FAMILY: 黑体; mso-fareast-language: ZH-CN">数字音频基础知识</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-FAMILY: ''''Times New Roman''''; mso-fareast-language: ZH-CN; mso-fareast-font-family: 黑体"><o:p></o:p></SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">麦克风录音的过程其实就是将模拟信号转化成数字信号的过程</SPAN><SPAN style="FONT-SIZE: 11pt; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">其中涉及的一些概念如下</SPAN><SPAN style="FONT-SIZE: 11pt; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">:<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN>1.</SPAN></B><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: ''''Times New Roman''''; mso-ascii-font-family: ''''Times New Roman''''">采样率</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Sampling Rate)<o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">采样率指声卡在一秒之中对声音</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">波形</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">)</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">作记录的次数</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">根据研究声音播出时的质量常常只能达到采样率的一半</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">因此必须采取双倍的采样率才能将声音标准重现</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">也就是只要采样率大于原始信号频率的两倍以上即可减低错误</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">达到和原始声音差不多的质量</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">人的听力大概是</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">20KHZ,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">所以高品质的采样率应为其两倍以上</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">当声音来源为音乐时</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">因为它所横跨的频率变化极为宽广</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">通常以</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">44.1KHZ</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">的频率为</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">CD</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">音乐采样率的标准</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">但是若以语言为主由于人说话的语音大概是</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">10KHZ,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">因此加倍采样</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">只取</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">22KHZ</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">即可</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">采样率越高所记录下来的音质就越清晰</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">当然</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">越高的采样所记录下的文件就越大</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN><B><SPAN style="COLOR: gray">2.</SPAN></B></SPAN><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">采样位</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">解析度决定了采样的音波是否能保持原来的形状</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">越接近原型则需解析度越高</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">若以</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">8</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位来采样的话其能表达的组合种类是</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">2</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">的</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">8</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">次方</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">即</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">256,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">表示用</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">8</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位的采样大小能分辨出</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">256</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">个层次的声音</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">若用</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">16</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位来采样</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">则能分辨的差异将高达</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">2</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">的</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">16</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">次方</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">为</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">65536,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">其精度自然大为提高</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.16</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,8</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位采样的差别在于动态范围的宽窄</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">动态范围宽广</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">音量起伏的大小变化就能够更精细的被记录下来</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">如此一来不论是细微的声音或是强烈的动感震撼</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">都可以表现的淋漓尽致</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">而</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">CD</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">音质的采样规格正式</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">16</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位采样的规格</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN><B><SPAN style="COLOR: gray">3. </SPAN></B></SPAN><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">量化误差</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Quantization error) <o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">在采样的过程中</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">不断连续变化的模拟信号要用数字化的数值来表示</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">这样的过程就会发生所谓的量化误差</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Quantization error).</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">所谓的量化误差指的是实际的信号的振幅</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(smplitude)</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">和数字化之后所的数字之间的差异</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">如果用将数字信号还原成模拟信号的角度看</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">量化误差就是失真</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Distortion).</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">我们可以用增加采样大小的方式来降低量化误差</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">也就是更多的位</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(bits)</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">来表示一个采样信号</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">这样可以提高精度</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.<o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN>4. </SPAN></B><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">量化</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Quantization), </SPAN></B><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">线性量化法</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Linear quantization)</SPAN></B><B><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">和非线性量化法</SPAN></B><B><SPAN style="FONT-SIZE: 11pt; COLOR: gray; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Nonlinear quantization)<o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.25in"><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">所谓的量化</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Quantization)</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">就是将模拟信号所代表的连续范围分成一段一段的区间</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">(Interval),</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">每一段区间我们定义一个数字化的值</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">区间的数目是跟采样大小有关</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">举例来说</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">有一种最简单的量化法称为</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">”</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">线性量化法</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">”(Linear quantization),</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">这种量化法采用等距离的间隔空间</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">架设一个讯号它的最大值是</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">5.0,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">采样大小为</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">3</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">位</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">则每个量化区间就时</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">5.0/2^3,</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">也就是</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">0.625</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-family: Verdana; mso-ascii-font-family: Verdana">单位</SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN">.</SPAN><SPAN lang=ZH-CN style="FONT-SIZE: 11pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-fareast-language: ZH-CN; mso-hansi-font-famil⌨️ 快捷键说明
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