{"id":93663,"date":"2026-08-13T00:08:52","date_gmt":"2026-08-12T16:08:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/93663.html"},"modified":"2026-08-13T00:08:52","modified_gmt":"2026-08-12T16:08:52","slug":"%e3%80%90%e6%95%b0%e5%ad%97%e4%bf%a1%e5%8f%b7%e5%a4%84%e7%90%86%e5%90%abmatlab%e4%bb%a3%e7%a0%81%e3%80%91%e7%ac%ac%e5%8d%81%e4%b8%89%e7%af%87%ef%bc%9a%e8%af%ad%e9%9f%b3%e7%ab%af%e7%82%b9%e6%a3%80","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/93663.html","title":{"rendered":"\u3010\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u542bmatlab\u4ee3\u7801\u3011\u7b2c\u5341\u4e09\u7bc7\uff1a\u8bed\u97f3\u7aef\u70b9\u68c0\u6d4b\u540e\u5904\u7406\u2014\u2014\u8fde\u7eed\u6709\u8bdd\u6bb5\u5206\u5272"},"content":{"rendered":"<h2>\u7b2c\u5341\u4e09\u7bc7&#xff1a;\u8bed\u97f3\u7aef\u70b9\u68c0\u6d4b\u540e\u5904\u7406\u2014\u2014\u8fde\u7eed\u6709\u8bdd\u6bb5\u5206\u5272<\/h2>\n<p>\u5728\u524d\u51e0\u7bc7\u4e2d&#xff0c;\u6211\u4eec\u5b8c\u6210\u4e86\u8bed\u97f3\u9884\u5904\u7406&#xff08;\u53bb\u8d8b\u52bf&#xff09;\u3001\u4fe1\u53f7\u9884\u6d4b\u5ef6\u62d3\u548c\u5cf0\u503c\u68c0\u6d4b\u3002\u73b0\u5728\u6211\u4eec\u628a\u76ee\u5149\u805a\u7126\u5230\u8bed\u97f3\u4fe1\u53f7\u5904\u7406\u7684\u6838\u5fc3\u524d\u7aef\u4efb\u52a1\u2014\u2014\u7aef\u70b9\u68c0\u6d4b&#xff08;Voice Activity Detection, VAD&#xff09;\u3002\u901a\u5e38&#xff0c;VAD \u7b97\u6cd5\u4f1a\u4ee5\u5e27\u4e3a\u5355\u4f4d\u8f93\u51fa\u4e00\u4e2a 0\/1 \u6807\u8bb0\u5e8f\u5217&#xff08;1 \u8868\u793a\u8be5\u5e27\u5305\u542b\u8bed\u97f3&#xff0c;0 \u8868\u793a\u9759\u97f3\u6216\u566a\u58f0&#xff09;&#xff0c;\u4f46\u8fd9\u6837\u7684\u6807\u8bb0\u5e8f\u5217\u662f\u79bb\u6563\u4e14\u96f6\u6563\u7684&#xff0c;\u6211\u4eec\u9700\u8981\u5c06\u5b83\u4eec\u805a\u5408\u4e3a\u8fde\u7eed\u7684\u8bed\u97f3\u7247\u6bb5&#xff0c;\u4ee5\u4fbf\u540e\u7eed\u9010\u6bb5\u8fdb\u884c\u7279\u5f81\u63d0\u53d6&#xff08;\u5982 MFCC&#xff09;\u3001\u8bc6\u522b\u6216\u5408\u6210\u3002findSegment.m \u6b63\u662f\u4e3a\u6b64\u800c\u751f&#xff1a;\u5b83\u5c06\u4e00\u7ef4\u7684\u6807\u8bb0\u5411\u91cf\u8f6c\u6362\u4e3a\u7ed3\u6784\u4f53\u6570\u7ec4&#xff0c;\u6e05\u6670\u5730\u7ed9\u51fa\u4e86\u6bcf\u4e2a\u6709\u58f0\u6bb5\u7684\u8d77\u59cb\u4f4d\u7f6e\u3001\u7ed3\u675f\u4f4d\u7f6e\u548c\u6301\u7eed\u65f6\u957f\u3002\u672c\u7bc7\u5c06\u6df1\u5165\u89e3\u6790\u5176\u4ee3\u7801\u5b9e\u73b0&#xff0c;\u5e76\u7ed3\u5408\u5b9e\u9645\u573a\u666f\u5c55\u793a\u5176\u7528\u6cd5\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260812160850-6a7c9a9228aa2.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h3>1. \u7aef\u70b9\u68c0\u6d4b\u80cc\u666f\u7b80\u8ff0<\/h3>\n<p>\u8bed\u97f3\u7aef\u70b9\u68c0\u6d4b\u7684\u76ee\u7684\u662f\u5728\u4e00\u6bb5\u5f55\u97f3\u4e2d\u51c6\u786e\u533a\u5206\u201c\u6709\u6548\u8bed\u97f3\u201d\u548c\u201c\u975e\u8bed\u97f3\u201d&#xff08;\u5305\u62ec\u9759\u97f3\u3001\u73af\u5883\u566a\u58f0\u3001\u547c\u5438\u58f0\u7b49&#xff09;\u3002\u5178\u578b\u7684 VAD \u7b97\u6cd5\u57fa\u4e8e\u80fd\u91cf\u3001\u8fc7\u96f6\u7387\u3001\u9891\u8c31\u8d28\u5fc3\u6216\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b&#xff0c;\u8f93\u51fa\u4e00\u4e2a\u4e0e\u5e27\u6570\u7b49\u957f\u7684\u903b\u8f91\u5411\u91cf express&#xff0c;\u5176\u4e2d express(i)&#061;1 \u8868\u793a\u7b2c i \u5e27\u4e3a\u8bed\u97f3&#xff0c;express(i)&#061;0 \u8868\u793a\u975e\u8bed\u97f3\u3002<\/p>\n<p>\u4f46\u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u6211\u4eec\u9700\u8981\u7684\u4e0d\u662f\u5e27\u7ea7\u6807\u8bb0&#xff0c;\u800c\u662f\u8fde\u7eed\u7684\u8bed\u97f3\u6bb5\u843d&#xff0c;\u56e0\u4e3a&#xff1a;<\/p>\n<ul>\n<li>\u8bed\u97f3\u8bc6\u522b\u6a21\u578b\u901a\u5e38\u4ee5\u201c\u53e5\u5b50\u201d\u6216\u201c\u8bcd\u7ec4\u201d\u4e3a\u5355\u4f4d\u8f93\u5165&#xff1b;<\/li>\n<li>\u7279\u5f81\u63d0\u53d6&#xff08;\u5982 LPC\u3001MFCC&#xff09;\u9700\u8981\u5728\u8fde\u7eed\u8bed\u97f3\u6bb5\u4e0a\u6ed1\u52a8\u7a97\u53e3&#xff1b;<\/li>\n<li>\u540e\u7eed\u5904\u7406&#xff08;\u5982\u57fa\u97f3\u8ddf\u8e2a\u3001\u5171\u632f\u5cf0\u63d0\u53d6&#xff09;\u4f9d\u8d56\u4e8e\u6bb5\u5185\u4fe1\u53f7\u7684\u7edf\u8ba1\u5e73\u7a33\u6027\u3002<\/li>\n<\/ul>\n<p>findSegment \u5c06\u6807\u8bb0\u5e8f\u5217\u8f6c\u6362\u4e3a\u6613\u8bfb\u7684\u7ed3\u6784\u5316\u6570\u636e&#xff0c;\u65b9\u4fbf\u6211\u4eec\u76f4\u63a5\u5b9a\u4f4d\u6bcf\u4e00\u6bb5\u8bed\u97f3\u7684\u8d77\u6b62\u6837\u672c\u7d22\u5f15\u3002<\/p>\n<hr \/>\n<h3>2. findSegment.m \u4ee3\u7801\u9010\u884c\u89e3\u6790<\/h3>\n<p><span class=\"token keyword\">function<\/span> soundSegment <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">findSegment<\/span><span class=\"token punctuation\">(<\/span>express<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token function\">express<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token number\">0<\/span><br \/>\n    voicedIndex <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>express<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                     <span class=\"token comment\">% \u5bfb\u627eexpress\u4e2d\u4e3a1\u7684\u4f4d\u7f6e<\/span><br \/>\n<span class=\"token keyword\">else<\/span><br \/>\n    voicedIndex <span class=\"token operator\">&#061;<\/span> express<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">end<\/span><\/p>\n<p>soundSegment <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\nk <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>begin <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">% \u8bbe\u7f6e\u7b2c\u4e00\u7ec4\u6709\u8bdd\u6bb5\u7684\u8d77\u59cb\u4f4d\u7f6e<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token number\">i<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span><span class=\"token function\">length<\/span><span class=\"token punctuation\">(<\/span>voicedIndex<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span>      <span class=\"token comment\">% \u672c\u7ec4\u6709\u8bdd\u6bb5\u7ed3\u675f<\/span><br \/>\n        <span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">end<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">% \u8bbe\u7f6e\u672c\u7ec4\u6709\u8bdd\u6bb5\u7684\u7ed3\u675f\u4f4d\u7f6e<\/span><br \/>\n        <span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>begin <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">% \u8bbe\u7f6e\u4e0b\u4e00\u7ec4\u6709\u8bdd\u6bb5\u7684\u8d77\u59cb\u4f4d\u7f6e  <\/span><br \/>\n        k <span class=\"token operator\">&#061;<\/span> k <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">end<\/span><br \/>\n<span class=\"token keyword\">end<\/span><br \/>\n<span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">end<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">voicedIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">end<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">% \u6700\u540e\u4e00\u7ec4\u6709\u8bdd\u6bb5\u7684\u7ed3\u675f\u4f4d\u7f6e<\/span><br \/>\n<span class=\"token comment\">% \u8ba1\u7b97\u6bcf\u7ec4\u6709\u8bdd\u6bb5\u7684\u957f\u5ea6<\/span><br \/>\n<span class=\"token keyword\">for<\/span> <span class=\"token number\">i<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">:<\/span> k<br \/>\n    <span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>duration <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">end<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token function\">soundSegment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">i<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>begin <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">end<\/span><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u8f93\u5165\u5904\u7406&#xff1a;\u51fd\u6570\u8f93\u5165 express \u53ef\u4ee5\u662f\u903b\u8f91\/\u6570\u503c\u5411\u91cf&#xff08;\u5e27\u6807\u8bb0&#xff09;\u3002\u5982\u679c express(1)&#061;&#061;0&#xff0c;\u8868\u793a\u7b2c\u4e00\u5e27\u4e0d\u662f\u8bed\u97f3&#xff0c;\u5219\u4f7f\u7528 find(express) \u63d0\u53d6\u6240\u6709 1 \u7684\u7d22\u5f15&#xff0c;\u5f97\u5230\u4e00\u4e2a\u8fde\u7eed\u7684\u7d22\u5f15\u5217\u8868 voicedIndex&#xff1b;\u82e5 express(1)&#061;&#061;1&#xff08;\u610f\u5473\u7740\u6574\u6bb5\u90fd\u662f\u8bed\u97f3&#xff0c;\u6216\u7b2c\u4e00\u5e27\u5373\u4e3a\u8bed\u97f3&#xff09;&#xff0c;\u5219\u76f4\u63a5\u5c06 express \u672c\u8eab\u4f5c\u4e3a\u7d22\u5f15\u5217\u8868&#xff08;\u8fd9\u91cc\u8bbe\u8ba1\u6709\u4e9b\u5de7\u5999&#xff0c;\u4f46\u5b9e\u9645\u4f7f\u7528\u4e2d express \u901a\u5e38\u4e3a 0\/1 \u5411\u91cf&#xff0c;\u5f88\u5c11\u76f4\u63a5\u4f5c\u4e3a\u7d22\u5f15&#xff0c;\u8fd9\u4e2a\u5206\u652f\u53ef\u80fd\u7528\u4e8e\u590d\u7528&#xff0c;\u6211\u4eec\u6682\u6309\u5e38\u89c4\u7406\u89e3&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u521d\u59cb\u5316\u7ed3\u6784\u4f53\u6570\u7ec4&#xff1a;soundSegment &#061; []&#xff0c;\u7136\u540e k&#061;1&#xff0c;\u5b9a\u4e49\u7b2c\u4e00\u4e2a\u6bb5\u7684\u7ed3\u6784\u4f53&#xff0c;\u8bbe\u7f6e begin \u4e3a\u7b2c\u4e00\u4e2a\u8bed\u97f3\u5e27\u7684\u7d22\u5f15\u3002<\/p>\n<\/li>\n<li>\n<p>\u5faa\u73af\u626b\u63cf\u76f8\u90bb\u7d22\u5f15&#xff1a;for i &#061; 1:length(voicedIndex)-1&#xff0c;\u68c0\u67e5 voicedIndex(i&#043;1) &#8211; voicedIndex(i) &gt; 1\u3002\u5982\u679c\u76f8\u5dee\u5927\u4e8e 1&#xff0c;\u8bf4\u660e\u8fd9\u4e24\u5e27\u4e4b\u95f4\u81f3\u5c11\u6709\u4e00\u5e27\u4e3a 0&#xff08;\u9759\u97f3&#xff09;&#xff0c;\u56e0\u6b64\u5f53\u524d\u6bb5\u5230\u6b64\u7ed3\u675f&#xff0c;\u65b0\u6bb5\u5f00\u59cb\u3002<\/p>\n<ul>\n<li>\u5c06\u5f53\u524d\u6bb5\u7684 end \u8bbe\u4e3a voicedIndex(i)&#xff1b;<\/li>\n<li>\u5c06\u65b0\u6bb5\u7684 begin \u8bbe\u4e3a voicedIndex(i&#043;1)&#xff1b;<\/li>\n<li>k \u81ea\u589e&#xff0c;\u51c6\u5907\u8bb0\u5f55\u65b0\u6bb5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7ed3\u675f\u5904\u7406&#xff1a;\u5faa\u73af\u7ed3\u675f\u540e&#xff0c;\u5c06\u6700\u540e\u4e00\u4e2a\u6bb5\u7684 end \u8bbe\u4e3a\u6700\u540e\u4e00\u4e2a\u8bed\u97f3\u5e27\u7684\u7d22\u5f15\u3002<\/p>\n<\/li>\n<li>\n<p>\u8ba1\u7b97\u65f6\u957f&#xff1a;\u904d\u5386\u6240\u6709\u6bb5&#xff0c;\u8ba1\u7b97\u6bcf\u6bb5\u7684\u6301\u7eed\u65f6\u95f4&#xff08;\u5e27\u6570&#xff09;&#xff0c;duration &#061; end &#8211; begin &#043; 1\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u8f93\u51fa\u7ed3\u6784&#xff1a;soundSegment \u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u6570\u7ec4&#xff0c;\u6bcf\u4e2a\u5143\u7d20\u5305\u542b\u5b57\u6bb5 begin\u3001end \u548c duration\u3002\u4f8b\u5982 soundSegment(1).begin &#061; 5&#xff0c;\u8868\u793a\u7b2c\u4e00\u4e2a\u8bed\u97f3\u6bb5\u4ece\u7b2c 5 \u5e27\u5f00\u59cb\u3002<\/p>\n<hr \/>\n<h3>3. \u4f7f\u7528\u793a\u4f8b\u4e0e\u53ef\u89c6\u5316<\/h3>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u6bb5\u97f3\u9891&#xff0c;\u901a\u8fc7\u7b80\u5355\u7684\u80fd\u91cf\u9608\u503c\u6cd5\u5f97\u5230 VAD \u6807\u8bb0&#xff08;\u4e3a\u6f14\u793a&#xff0c;\u624b\u52a8\u6784\u9020\u4e00\u4e2a\u6807\u8bb0\u5e8f\u5217&#xff09;&#xff1a;<\/p>\n<p><span class=\"token comment\">% \u6a21\u62df 20 \u5e27\u7684\u6807\u8bb0&#xff0c;1 \u8868\u793a\u8bed\u97f3<\/span><br \/>\nexpress <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span> <span class=\"token number\">0<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">0<\/span> <span class=\"token number\">0<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">0<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">1<\/span> <span class=\"token number\">0<\/span> <span class=\"token number\">0<\/span> <span class=\"token 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