{"id":561,"date":"2020-10-08T17:17:58","date_gmt":"2020-10-08T09:17:58","guid":{"rendered":"https:\/\/soundbody-audio.com\/?p=561"},"modified":"2021-03-26T19:06:29","modified_gmt":"2021-03-26T11:06:29","slug":"%e9%81%a0%e9%81%a0%e8%b6%85%e4%b9%8e%e6%83%b3%e5%83%8f%e7%9a%84%e5%b0%8f%e5%9e%8b%e6%8f%9a%e8%81%b2%e5%99%a8","status":"publish","type":"post","link":"https:\/\/soundbody-audio.com\/%e9%81%a0%e9%81%a0%e8%b6%85%e4%b9%8e%e6%83%b3%e5%83%8f%e7%9a%84%e5%b0%8f%e5%9e%8b%e6%8f%9a%e8%81%b2%e5%99%a8\/","title":{"rendered":"<\u770b\u89c0\u5ff5> DSP \u5728\u97f3\u983b\u9818\u57df\u7684\u61c9\u7528"},"content":{"rendered":"\n<h3><span style=\"font-size: 75%;\">\u64b0\u6587\/\u963f\u660c\u54e5<\/span><\/h3>\n<h3><span style=\"color: #800000; font-size: 75%;\"><em>\u00a0 \u00a0 \u00a0\u6578\u4f4d\u8a0a\u865f\u8655\u7406\uff08Digital Signal Processing,DSP\uff09\uff0c\u4e5f\u5c31\u662f\u4f7f\u7528\u6578\u4f4d\u904b\u7b97\u4f86\u8655\u7406\u554f\u984c\u7684\u65b9\u6cd5\u3002<\/em><\/span><\/h3>\n<h3><span style=\"color: #800000; font-size: 75%;\"><em>\u00a0 \u00a0 \u00a0DSP \u4e00\u8a5e\u5c0d\u73fe\u4ee3\u4eba\u800c\u8a00\uff0c\u672a\u5fc5\u77e5\u5176\u6240\u4ee5\u7136\uff0c\u537b\u4e5f\u4e0d\u964c\u751f\u3002 \u8209\u51e1\u8a9e\u97f3\u8fa8\u8b58\u3001\u901a\u8a0a\u5de5\u7a0b\u3001\u6c23\u8c61\u5206\u6790\u3001\u5f71\u50cf\u8655\u7406&#8230;&#8230;\u7b49\u7b49\u3002 \u751f\u6d3b\u4e2d\u904b\u7528\u5230 DSP \u6280\u8853\u7684\u61c9\u7528\u5be6\u5728\u662f\u4e0d\u52dd\u679a\u8209\u3002<\/em><\/span><\/h3>\n<h3>\u00a0<\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u6578\u4f4d\u8a0a\u865f\u8655\u7406\uff08Digital Signal Processing,DSP\uff09\uff0c\u5c31\u662f\u4f7f\u7528\u6578\u4f4d\u904b\u7b97\u4f86\u8655 \u7406\u554f\u984c\u7684\u65b9\u6cd5\u3002DSP \u4e00\u8a5e\u5c0d\u73fe\u4ee3\u4eba\u800c\u8a00\uff0c\u672a\u5fc5\u77e5\u5176\u6240\u4ee5\u7136\uff0c\u537b\u4e0d\u964c\u751f\u3002\u8209\u51e1\u8a9e \u97f3\u8fa8\u8b58\u3001\u901a\u8a0a\u5de5\u7a0b\u3001\u6c23\u8c61\u5206\u6790\u3001\u5f71\u50cf\u8655\u7406 &#8230;&#8230; \u7b49\u7b49\u3002\u751f\u6d3b\u4e2d\u904b\u7528\u5230 DSP \u6280\u8853 \u7684\u61c9\u7528\u5be6\u5728\u4e0d\u52dd\u679a\u8209\u3002\u6642\u81f3\u4eca\u65e5\uff0cDSP \u7684\u767c\u5c55\u5305\u7f85\u842c\u8c61\uff0c\u7d55\u975e\u4e09\u8a00\u5169\u8a9e\u80fd\u5920 \u8aaa\u5b8c\u3002\u672c\u6587\u5c07\u5c31 DSP \u7684\u6982\u5ff5\u8207\u5728\u97f3\u983b\u9818\u57df\u4e2d\u5e38\u898b\u7684 DSP \u6280\u8853\u505a\u4e00\u500b\u57fa\u672c\u7684\u4ecb \u7d39\u3002<\/span><\/h3>\n<p>\u00a0<\/p>\n<h2><span style=\"color: #666699; font-size: 100%;\">\u53d6\u6a23 + \u91cf\u5316 = \u6578\u4f4d\u5316<\/span><\/h2>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u50c5\u50c5\u4ee5\u300c\u6578\u4f4d\u8a0a\u865f\u8655\u7406\u300d\u9019\u6a23\u76f4\u8b6f\u5f0f\u7684\u8aaa\u660e DSP\uff0c\u6050\u6015\u5f88\u591a\u4eba\u662f\u7121\u6cd5\u660e\u77ad\u3002 \u9996\u5148\u6211\u5011\u5fc5\u9808\u754c\u5b9a\u4f55\u8b02\u300c\u6578\u4f4d\u8a0a\u865f\u300d\uff1f\u8207\u6578\u4f4d\u8a0a\u865f\u76f8\u5c0d\u61c9\u7684\u5c31\u662f\u985e\u6bd4\u8a0a\u865f\u3002\u7dad \u57fa\u767e\u79d1\u5c0d\u6578\u4f4d\u8a0a\u865f\u7684\u89e3\u91cb\u70ba:\u6578\u4f4d\u5316\u7684\u96e2\u6563\u6642\u9593\u8a0a\u865f\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4ea6\u5373\u5728\u7279\u5b9a\u7684\u6642\u9593\u4e0b\u5c07\u985e\u6bd4\u8a0a\u865f\u4f5c\u300c\u6578\u4f4d\u5316\u300d\uff08<\/span><span style=\"font-size: 75%;\">Digitalize\uff09\u8655\u7406\u4e4b\u5f8c\u6240\u5f97\u5230 \u7684\u8cc7\u8a0a\u3002\u8a73\u7d30\u4e00\u9ede\u8aaa\u5c31\u662f\u5728\u7279\u5b9a\u7684\u6642\u9593\u4e0b\u9032\u884c\u300c\u53d6\u6a23\u300d\uff08Sampling\uff09\uff0c\u518d\u5c07\u6b32 \u8655\u88e1\u7684\u53d6\u6a23\u5f8c\u96e2\u6563\u8a0a\u865f\u4f5c\u300c\u91cf\u5316\u300d\uff08<\/span><span style=\"font-size: 75%;\">Quantize\uff09\u8655\u7406\uff0c\u8f49\u63db\u6210\u5c0d\u61c9\u7684\u6578\u5b57\uff0c\u5f9e \u800c\u5b8c\u6210\u6578\u4f4d\u5316\u7684\u5de5\u4f5c\u3002<span style=\"color: #008080;\"><em>\uff08\u300a\u97f3\u97ff\u5165\u9580\u8a8c:DAC &amp; \u8033\u64f4\u7bc7\u300b\u4e2d\u3008\u77e5\u8b58\u5bb6\u3009\u55ae\u5143\u6703\u8a73\u7d30\u89e3\u8aaa\u6578\u4f4d\u539f\u7406\u3002)<\/em><\/span><\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u9019\u88e1\u6709\u4e8c\u500b\u5c0d\u65bc\u6578\u4f4d\u5316\u81f3\u95dc\u91cd\u8981\u7684\u52d5\u4f5c\uff1a\u300c\u53d6\u6a23\u300d\u8207\u300c\u91cf\u5316\u300d\uff0c\u4e4b\u5f8c\u6bb5\u843d\u6211 \u5011\u5c07\u9032\u4e00\u6b65\u8a0e\u8ad6\u3002\u5728\u53d6\u5f97\u6578\u4f4d\u8cc7\u8a0a\u5f8c\uff0c\u5c31\u53ef\u4ee5\u9032\u884c\u9069\u7576\u7684\u904b\u7b97\uff0c\u9054\u6210\u6211\u5011\u5c0d\u65bc \u97f3\u983b\u8a0a\u865f\u8655\u7406\u7684\u8981\u6c42\u3002<\/span><\/h3>\n<p><img loading=\"lazy\" class=\"wp-image-882 aligncenter\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49-607x400.png\" alt=\"\" width=\"525\" height=\"346\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49-607x400.png 607w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49-510x336.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49-1214x800.png 1214w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49-768x506.png 768w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.11.49.png 1278w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/><\/p>\n<blockquote>\n<p><em><span style=\"font-size: 75%; color: #808080;\">\u5347\u7d1a\u5957\u4ef6\u7684\u91cd\u4f4e\u97f3\u653e\u5927\u6a21\u7d44\uff0c\u5c31\u662f\u5229\u7528 DSP \u6578\u4f4d\u8655\u7406\u6280\u8853\u8b93\u8072\u97f3\u7684\u5206\u983b\u5f97\u4ee5\u5be6\u73fe\u3002<\/span><\/em><\/p>\n<\/blockquote>\n<p>\u00a0<\/p>\n<h2><span style=\"font-size: 100%; color: #666699;\">\u5c08\u9580\u4efb\u52d9\u7684\u597d\u5e6b\u624b\u2015 DSP<\/span><\/h2>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u5e38\u898b\u5230\u6280\u8853\u6587\u7ae0\u4e2d\uff0c\u63d0\u5230\u300cDSP \u5143\u4ef6\u300d\u4e00\u8a5e\uff0c\u8207\u6211\u5011\u6240\u719f\u77e5\u7684 CPU (\u4e2d\u592e\u8655\u7406\u5668\uff0cCentral Processing Unit)\u53c8\u6709\u4ec0\u9ebc\u5340\u5225?\u5176\u5be6\uff0cCPU \u5728\u6574\u500b\u8cc7\u6599\u8655\u7406\u6d41\u7a0b\u4e2d\u64d4\u4efb\u7684\u662f\u300c\u4e2d\u6a1e\u300d\u7684\u89d2\u8272\uff0c\u9019\u4e9b\u8655\u7406\u5de5\u4f5c\u5305\u542b\u6578\u5b78\u8a08 \u7b97\u3001\u5224\u65b7\u8655\u7406\u3001\u8cc7\u6599\u642c\u79fb\u7b49\uff0c\u53ef\u662f CPU \u4e26\u4e0d\u662f\u4efb\u4f55\u4efb\u52d9\u7684\u6700\u4f73\u9078\u64c7\u3002\u4e00\u65b9\u9762\u8003\u616e\u5230 CPU \u5de5\u4f5c\u7684\u8ca0\u8f09\uff0c\u53e6\u4e00\u65b9\u9762 CPU \u7684\u6578\u5b78\u904b\u7b97\u529f\u8017\u76f8\u5c0d\u8f03\u9ad8\uff0c \u6240\u4ee5\u5de5\u7a0b\u5e2b\u5011\u8a2d\u8a08\u4e86\u4e00\u500b\u8f14\u52a9\u5e6b\u624b\uff0c\u91dd\u5c0d\u6578\u5b78\u904b\u7b97\u63d0\u4f9b\u4e00\u500b\u6700\u4f73\u67b6\u69cb\u7684 \u96fb\u8def\uff0c\u4e5f\u662f\u6578\u4f4d\u8a0a\u865f\u8655\u7406\u300c\u5668\u300d\u2500 DSP\uff08Digital Signal Processor\uff09\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4f8b\u5982\uff0c\u624b\u6a5f CPU \u5728\u9700\u8981\u4f5c\u97f3\u983b\u8a0a\u865f\u8655\u7406\u3001\u8a9e\u97f3\u8655\u7406\u6216\u964d\u566a\u7b49\u97f3\u983b\u76f8 \u95dc\u5de5\u4f5c\u6642\uff0c\u4fbf\u5c07\u9019\u4e9b\u4efb\u52d9\u5206\u6d3e\u7d66\u97f3\u983b DSP\u3002\u85c9\u6b64 CPU \u4fbf\u80fd\u6e1b\u5c11\u4e00\u4e9b\u5de5 \u4f5c\uff0c\u800c\u7372\u5f97\u984d\u5916\u7684\u8655\u7406\u80fd\u529b\u3002\u540c\u6642\u5229\u7528\u300c\u7570\u69cb\u8a08\u7b97\u300d(Heterogeneous computing)\uff0cCPU \u8207 DSP \u80fd\u5920\u540c\u6642\u5404\u81ea\u57f7\u884c\u4e0d\u540c\u7684\u4efb\u52d9\uff0c\u5927\u5e45\u63d0\u6607\u904b \u884c\u6548\u7387\u3002\u6b63\u662f\u56e0\u70ba DSP \u6709\u8457\u591a\u7a2e\u597d\u8655\uff0c\u5982\u4eca DSP \u5728\u97f3\u983b\u8655\u7406\u4e2d\u7684\u61c9\u7528\u6975 \u70ba\u5ee3\u6cdb\uff0c\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u8655\u7406\u5668\u5143\u4ef6\u3002<\/span><\/h3>\n<p>\u00a0<\/p>\n<h2><span style=\"font-size: 100%; color: #666699;\">\u5f9e\u985e\u6bd4\u8d70\u5411\u5fc5\u7136\u7684\u6578\u4f4d\u5316<\/span><\/h2>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4f46\u662f DSP \u53ea\u662f\u4e00\u500b\u642d\u914d CPU \u505a\u8cc7\u6599\u8655\u7406\u4e0a\u7684\u914d\u89d2\u55ce\uff1f\u8b93\u6211\u5011\u56de\u9867\u4e00\u4e0b\u96fb\u5b50\u5de5\u7a0b\u7684\u767c\u5c55\u3002\u5f9e 19 \u4e16\u7d00\u96fb\u6a5f\u96fb\u5b50\u5de5\u7a0b\u840c\u82bd\uff0c\u5230\u4e86 20 \u4e16\u7d00\u958b\u59cb\uff0c \u985e\u6bd4\u96fb\u8def\u84ec\u52c3\u767c\u5c55\u3002\u4f34\u96a8\u8457\u771f\u7a7a\u7ba1\u7684\u767c\u660e\uff0c\u6578\u4f4d\u96fb\u8def\u6162\u6162\u6210\u5f62\u3002\u7dca\u63a5\u8457\u534a\u5c0e\u9ad4\u767c\u660e\u3001\u7a4d\u9ad4\u96fb\u8def\u9032\u6b65\uff0c\u6578\u4f4d\u8655\u7406\u96fb\u8def\u8b8a\u5f97\u4e0d\u518d\u9059\u4e0d\u53ef\u53ca\u3002\u5728\u6b64\u540c\u6642\uff0c\u985e\u6bd4\u96fb\u8def\u7684\u767c\u5c55\u4e5f\u9762\u81e8\u5230\u74f6\u9838\uff0c\u8017\u80fd\u3001\u9ad8\u7cbe\u5ea6\u96e3\u4ee5\u9054\u6210\u3001\u5c0f\u578b\u5316\u56f0\u96e3\u7b49\u8af8\u591a\u554f\u984c\u63a5\u8e35\u800c\u81f3\u3002\u5176\u4e2d\u9084\u6709\u4e00\u500b\u95dc\u9375\u554f\u984c\uff1a\u6210\u672c\u2500\u66f4\u662f\u50cf\u4e94\u6307\u5c71\u4e00\u6a23\u7684\u58d3\u5728\u50b3\u7d71\u985e\u6bd4\u96fb\u5b50\u7684\u767c\u5c55\u4e0a\u3002\u6240\u4ee5\u5de5\u7a0b\u5e2b\u5011\u8f49\u800c\u5c0b\u6c42\u4f7f\u7528\u6578\u4f4d\u96fb\u8def\uff0c\u53e6\u95e2\u8e4a\u5f91\uff0c\u6253\u7834\u50f5\u5c40\uff0c\u6700\u5177\u4ee3\u8868\u7684\u5c31\u662f\u6578\u4f4d\u97f3\u6e90\u7684\u63a8\u5ee3\u3002<\/span><\/h3>\n<div class=\"is-divider divider clearfix\" style=\"margin-top:0.6em;margin-bottom:0.6em;\"><\/div>\n\n<div class=\"row\"  id=\"row-1266366602\">\n\n\n\t<div id=\"col-990907414\" class=\"col medium-11 small-12 large-11 col-divided\"  >\n\t\t\t\t<div class=\"col-inner text-left\" style=\"background-color:rgb(154, 183, 167);\" >\n\t\t\t\n\t\t\t\n\n<h3><span style=\"font-size: 100%; color: #f2f2f2; background-color: #618061;\">\u00a0 \u7570\u69cb\u8a08\u7b97 Heterogeneous computing\u00a0 \u00a0<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 <img loading=\"lazy\" class=\" wp-image-893 alignright\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.58.38-1.png\" alt=\"\" width=\"175\" height=\"175\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.58.38-1.png 254w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.58.38-1-100x100.png 100w\" sizes=\"(max-width: 175px) 100vw, 175px\" \/>\u00a0<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 <span style=\"color: #ffffff;\">\u00a0\u53c8\u8b6f\u70ba\u300c\u7570\u8cea\u904b\u7b97\u300d\uff0c\u4e3b\u8981\u662f\u6307\u4f7f\u7528\u4e0d\u540c\u985e\u578b\u6307\u4ee4\u96c6\u8207\u9ad4\u7cfb\u67b6\u69cb\u7684\u8a08\u7b97 \u55ae\u5143\u7d44\u6210\u7cfb\u7d71\u7684\u8a08\u7b97\u65b9\u5f0f\u3002 \u5e38\u898b\u7684\u8a08\u7b97\u55ae\u5143\u985e\u5225\u5305\u62ec CPU\u3001GPU \u7b49\u5354\u8655\u7406 \u5668\u3001DSP\u3001ASIC\u3001FPGA \u7b49\u3002\u70ba\u4e86\u6e1b\u8f15 CPU \u7684\u5de5\u4f5c\u8ca0\u64d4\uff0c\u6240\u4ee5\u5c07\u90e8\u5206\u5de5\u4f5c\u5206 \u6d3e\u7d66 GPU \u6216 DSP \u7b49\u6676\u7247\uff0c\u5927\u5bb6\u540c\u6642\u5de5\u4f5c\uff0c\u9054\u5230\u66f4\u9ad8\u7684\u6548\u80fd\u3002\u7c21\u55ae\u7684\u8aaa\uff0c\u5c31 \u662f\u4e00\u7a2e\u591a\u5de5\u7684\u4f5c\u696d\u65b9\u5f0f\u3002<\/span><\/span><\/h3>\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-990907414 > .col-inner {\n  padding: 22px 22px 20px 33px;\n  margin: 0px 8px 0px -1px;\n  border-radius: 6px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n<\/div>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u81ea\u5f9e 20 \u4e16\u7d00\u5f8c\u671f CD \u554f\u4e16\uff0c\u540c\u6642\u5ba3\u544a\u4e86\u97f3\u6e90\u6578\u4f4d\u5316\u7684\u958b\u59cb\u3002\u5c0d\u65bc\u9019\u91cd\u5927\u7684\u8b8a\u9769\uff0c\u8d77\u521d\u5e02\u5834\u662f\u4e0d\u8cb7\u5e33\u7684\u3002\u53cd\u5c0d\u6d3e\u63d0\u51fa\u4e00\u500b\u842c\u4e16\u60e1\u540d\u4f86\u6392\u64e0\u6578\u4f4d\u97f3\u983b&#8211;\u300c\u6578\u78bc\u8072\u300d\u3002\u59d1\u4e14\u4e0d\u8ad6\u662f\u5426\u56e0\u70ba\u7576\u6642\u6280\u8853\u5c1a\u672a\u6210\u719f\uff0c\u6216\u662f\u4eba\u5011\u7684\u4f7f\u7528\u7fd2\u6163\u96e3\u4ee5\u6539\u8b8a\u4e4b\u6545\uff0c\u6578\u4f4d\u97f3\u6e90\u76f8\u95dc\u7684\u92b7\u552e\u59cb\u7d42\u597d\u4e0d\u8d77\u4f86\uff0c\u6700\u70ba\u4e3b\u8981\u7684\u539f\u56e0\u9084\u662f\u300c\u6602\u8cb4\u300d\u3002<\/span><\/h3>\n<p>\u00a0<\/p>\n<h3><span style=\"font-size: 100%; color: #666699;\">DAC \u7684\u767c\u9054\u52a9\u9577\u4e86 DSP \u7684\u767c\u5c55<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4ee5\u53f0\u7063\u4f86\u8aaa\uff0c1980 \u5e74\u4ee3\u4e00\u5f35\u9ed1\u81a0\u5531\u7247\u6216\u5361\u5e36\u7d04 120-150 \u5143\uff0c\u4f46\u662f CD \u5247\u70ba 500 \u5143\u4e0a\u4e0b\u3002\u5230\u4e86 1990 \u5e74\u5de6\u53f3 CD \u50f9\u683c\u7a0d\u964d\uff0c\u4e5f\u9084\u662f\u8981 300 \u5143\u8d77\u8df3\u3002\u518d\u8005\uff0cCD \u5531\u76e4\u7684\u50f9\u683c\u5c45\u9ad8\u4e0d\u4e0b\uff0c\u4e5f\u662f\u4e00\u5927\u969c\u7919\u3002\u8b93\u6211\u5011\u628a\u95dc\u6ce8\u7684\u7126\u9ede\u653e\u5230\u5176\u95dc\u9375\u96f6\u4ef6 DAC \u4e0a\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u65e9\u671f DAC \u5c6c\u65bc multi-level \u67b6\u69cb\uff08\u4e5f\u5c31\u662f R-2R Ladder \u67b6\u69cb\uff09\uff0c\u5176\u539f\u7406\u53ef\u8996\u70ba\u4e00\u9023\u4e32\u7684\u96fb\u963b\u52a0\u4e0a\u4e00\u5806\u958b\u95dc\u6240\u5f62\u6210\u7684\u96fb\u963b\u5206\u58d3\u96fb\u8def\u3002\u7d93\u7531\u958b\u95dc\u7684\u5c0e\u901a\u6216\u662f\u65b7\u958b\uff0c\u6539\u8b8a\u7b49\u6548\u96fb\u963b\u963b\u503c\uff0c\u4e5f\u5c31\u6539\u8b8a\u4e86\u8f38\u51fa\u96fb\u58d3\uff0c\u7522\u751f\u51fa\u6bcf\u4e00\u7b46\u6578\u4f4d\u5167\u5bb9\u6240\u5c0d\u61c9\u7684\u96fb\u58d3\u3002\u9019\u500b\u67b6\u69cb\u975e\u5e38\u76f4\u89c0\uff0c\u537b\u5b58\u5728\u8457\u660e\u986f\u7684\u7f3a\u9ede\u3002\u7b2c\u4e00\u500b\u554f\u984c\u5373\u662f\u7cbe\u5ea6\u4e0d\u8db3\uff0c\u5c31\u4ee5\u96fb\u963b\u5206\u58d3\u67b6\u69cb\u4f86\u8a0e\u8ad6\uff0c\u5404\u500b\u96fb\u963b\u7684\u7cbe\u6e96\u5ea6\u52e2\u5fc5\u6975\u70ba\u91cd\u8981\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4f46\u662f\u88fd\u9020\u5de5\u85dd\u7562\u7adf\u6709\u5176\u6975\u9650\uff0c\u5118\u7ba1\u53ea\u662f 16bit\uff0c\u5728 1980 \u5e74\u4ee3\u9084\u662f\u7121\u6cd5 \u8981\u6c42\u91cf\u7522\u6676\u7247\u4e0a\u7684\u6bcf\u4e00\u500b\u96fb\u963b\u90fd\u662f\u5339\u914d\u826f\u597d\u7684\u4f73\u4f5c\u3002\u6240\u4ee5\u624d\u6703\u6709\u5c07\u7522\u54c1\u9010 \u4e00\u91cf\u6e2c\uff0c\u4f9d\u5176\u54c1\u8cea\u5340\u5206\u7b49\u7d1a\u3002\u6700\u6709\u540d\u7684\u5c31\u662f Philips TDA1541\uff0c\u5206\u6210\u4e00\u822c \u54c1\u3001\u55ae\u7687\u51a0\u4ee5\u53ca\u96d9\u7687\u51a0\u7b49\u4e0d\u540c\u7d1a\u5225\u7684\u7522\u54c1\u3002\u56e0\u70ba\u5982\u6b64\uff0c16bit \u4e43\u81f3 18bit \u7684 DAC \u5e7e\u4e4e\u5df2\u662f\u751f\u7522\u5de5\u85dd\u7684\u6975\u9650\uff0c\u5f88\u96e3\u518d\u7a81\u7834\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0\u518d\u8005\uff0c\u56e0\u70ba\u9700\u8981\u6ffe\u9664\u300c\u983b\u5e36\u5916\u566a\u8a0a\u300d(out-of-band noise)\uff0c\u6545\u5fc5\u9808 \u5728 DAC \u8f38\u51fa\u7aef\u642d\u914d\u4e00\u500b\u985e\u6bd4 LPF(Low Pass Filter\uff0c\u4f4e\u901a\u6ffe\u6ce2\u5668)\uff0c\u9019\u53c8 \u662f\u4e00\u500b\u554f\u984c\u6240\u5728\u3002\u4ee5\u53d6\u6a23\u7387 44.1kHz \u800c\u8a00\uff0c\u4e00\u822c LPF \u983b\u7387\u97ff\u61c9\u7684 -3dB \u4fbf \u8a2d\u5b9a\u5728 20kHz\uff0c\u56e0\u70ba\u592a\u63a5\u8fd1\u97f3\u983b\uff0c\u4e00\u4e0d\u6ce8\u610f\u5f88 \u5bb9\u6613\u5c31\u6210\u70ba\u97f3\u8cea\u52a3\u5316\u7684\u5e6b\u5147\u3002\u4e0d\u904e\u96a8\u8457\u534a\u5c0e\u9ad4 \u88fd\u7a0b\u6280\u8853\u9032\u6b65\uff0c\u6578\u4f4d\u96fb\u8def\u7a81\u98db\u731b\u9032\uff0c\u55ae\u4f4d\u9762\u7a4d \u5167\u80fd\u5bb9\u7d0d\u66f4\u591a\u7684\u96fb\u6676\u9ad4\uff0c\u904b\u7b97\u901f\u5ea6\u4e5f\u66f4\u5feb\u3002<\/span><span style=\"font-size: 75%;\">\u65bc<\/span><span style=\"font-size: 75%;\">\u662f\u5de5\u7a0b\u5e2b\u5011\u628a\u8166\u7b4b\u52d5\u5230 DSP \u4e0a\u9762\uff0c\u7c21\u8a00\u4e4b\uff0c\u5c31\u662f\u4e00\u500b\u52a0\u5165 DSP \u7684\u65b0\u578b\u614b DAC\u3002<\/span><em style=\"color: #808080;\">\u00a0<\/em><\/h3>\n<blockquote>\n<p><img loading=\"lazy\" class=\"wp-image-885 alignright\" style=\"color: #555555; font-size: 14.4px;\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.12.59-651x400.png\" alt=\"\" width=\"222\" height=\"136\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.12.59-651x400.png 651w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.12.59-510x313.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.12.59-768x472.png 768w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.12.59.png 772w\" sizes=\"(max-width: 222px) 100vw, 222px\" \/><em style=\"color: #808080;\">\u7d93\u5178\u7684 R-2R \u67b6\u69cb DAC \u6676\u7247\uff1aPhilips TDA1541\u3002<\/em><\/p>\n<\/blockquote>\n<h3>\u00a0<\/h3>\n<p>\u00a0<\/p>\n<h3><span style=\"font-size: 100%; color: #666699;\">\u5f37\u5927\u7684 DSP \u8b93 DAC \u8b8a\u5f97\u66f4\u7c21\u55ae<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u8a66\u60f3\u4e00\u500b DAC \u5167\u90e8\u4e0d\u518d\u662f\u7531\u8a31\u591a\u96fb\u963b\u69cb\u6210\uff0c\u800c\u662f\u53ea\u6709\u4e00\u500b\u96fb\u963b\uff0c\u90a3\u9ebc\u96fb\u963b \u7cbe\u5ea6\u4fbf\u4e0d\u518d\u91cd\u8981\u3002\u540c\u6642\u914d\u5408\u300c\u566a\u8a0a\u92b3\u5316\u300d(Noise Shaping)\uff0c\u5c07\u983b\u5e36\u5916\u566a\u8a0a\u79fb\u81f3\u4eba\u8033\u8f03\u4e0d\u654f\u611f\u7684\u6975\u9ad8\u983b\u8655\u3002\u5982\u6b64\u4e00\u4f86\uff0c\u539f\u672c\u4ee4\u4eba\u7169\u60f1\u7684 LPF \u8a2d\u8a08\u4e5f\u5c31\u7c21\u55ae\u4e0d\u5c11\u3002\u751a\u81f3\u5728\u4e00\u4e9b\u4f4e\u50f9\u6a5f\u7a2e\uff0c\u53ea\u9700\u4e00\u500b\u96fb\u963b\u52a0\u4e0a\u4e00\u500b\u96fb\u5bb9\u7d44\u6210\u7684 RC \u88ab\u52d5\u6ffe\u6ce2\u5668\u5c31\u53ef\u9054\u6210\u76f8\u7576\u7684\u97f3\u8cea\u76ee\u6a19\u3002\u8981\u9054\u6210\u6b64\u4e00\u76ee\u6a19\uff0c\u5c31\u9700\u8981 DSP \u9032\u884c\u6578\u4f4d\u8abf\u8b8a\u3001Over-sampling\uff08<\/span><span style=\"font-size: 75%;\">\u8d85\u53d6\u6a23\uff09\u3001Interpolation\uff08\u63d2\u88dc\uff09\u7b49\u904b\u7b97\u3002\u6700\u5f8c\u53ea\u9700\u518d\u642d\u914d\u4e00\u500b\u5927\u5e45\u7c21\u5316\u904e\u7684\u985e\u6bd4\u96fb\u8def\uff0c\u5c31\u53ef\u4ee5\u9054\u6210\u65e2\u63d0\u9ad8\u7cbe\u5ea6\u53c8\u964d\u4f4e\u6210\u672c\u7684\u91cd\u5927 \u76ee\u6a19\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u9019\u4e5f\u5c31\u662f\u6240\u8b02\u7684\u300c\u6df7\u5408\u8a0a\u865f\u96fb\u8def\u300d\uff08Mixed-signal integrated circuit\uff09\u7684\u7d93\u5178\u61c9\u7528\u7bc4\u4f8b\u3002\u6642\u9593\u4f86\u5230\u4e0a\u4e16\u7d00\u672b\uff0c\u6700\u5f8c\u7531\u65bc\u8edf\u9ad4\u8207\u786c\u9ad4\u540c\u6b65\u964d\u50f9\uff0c\u6578\u4f4d\u97f3\u6e90\u624d \u6162\u6162\u666e\u53ca\uff0c\u6210\u70ba\u5e02\u5834\u4e3b\u6d41\u3002\u6642\u81f3\u4eca\u65e5\uff0c\u7d55\u5927\u591a\u6578\u7684 Audio DAC \u90fd\u63a1\u7528 delta- sigma \u67b6\u69cb\uff0c\u914d\u5408\u65e5\u76ca\u7cbe\u9032\u7684\u88fd\u7a0b\u6280\u8853\uff0cIC \u7684\u6578\u4f4d\u904b\u7b97\u80fd\u529b\u66f4\u52a0\u5f37\u5927\uff0c\u66f4\u6709 DAC \u5df2\u7d93\u53ef\u9054 32bit\/768kHz\uff0c\u5176\u4ed6\u5982 SNR\uff08\u8a0a\u566a\u6bd4\uff09\u3001THD\uff08\u7e3d\u8ae7\u6ce2\u5931\u771f\uff09\u7b49 \u91cd\u8981\u6280\u8853\u6307\u6a19\u90fd\u9054\u5230\u6975\u70ba\u512a\u7570\u7684\u5730\u6b65\uff0c\u9019\u4e0d\u50c5\u50c5\u662f\u985e\u6bd4\u96fb\u8def\u7684\u9032\u6b65\u800c\u5df2\u3002\u5404\u5bb6 \u5ee0\u5546\u91dd\u5c0d\u6578\u4f4d\u6ffe\u6ce2\u5668\uff08\u5373 DSP \u7684\u61c9\u7528\uff09\u7684\u9032\u6b65\u4e5f\u662f\u6975\u70ba\u91cd\u8981\u7684\u4e00\u90e8\u5206\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u4ee5\u4e0a\u6211\u5011\u50c5\u5c31 DSP \u61c9\u7528\u5728\u55ae\u4e00\u97f3\u983b\u96f6\u7d44\u4ef6\u505a\u7c97\u6dfa\u7684\u4ecb\u7d39\u3002\u63a5\u4e0b\u4f86\u6211\u5011\u518d\u56de \u982d\u8aaa\u5230\u65e5\u5e38\u751f\u6d3b\u9084\u6709\u54ea\u4e9b\u6211\u5011\u7d93\u5e38\u4f7f\u7528\u537b\u5ffd\u7565\u7684\u97f3\u983b DSP \u6280\u8853\u3002<\/span><\/h3>\n<p><img loading=\"lazy\" class=\"size-medium wp-image-886 aligncenter\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-800x370.png\" alt=\"\" width=\"800\" height=\"370\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-800x370.png 800w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-510x236.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-1400x648.png 1400w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-768x356.png 768w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42-1536x711.png 1536w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.42.png 1888w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3>\u00a0<\/h3>\n<h3><span style=\"font-size: 100%; color: #666699;\">\u6578\u4f4d\u97f3\u91cf\u63a7\u5236(Digital Volume Control)<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u97f3\u91cf\u63a7\u5236\u662f\u97f3\u97ff\u5668\u6750\u4e00\u5b9a\u6703\u4f7f\u7528\u5230\u7684\u529f\u80fd\uff0c\u5728\u985e\u6bd4\u96fb\u8def\u4e2d\uff0c\u4e0d\u5916\u4e4e\u4f7f\u7528\u53ef\u8b8a\u96fb\u963b\u6216\u662f\u7d1a\u9032\u5f0f\u96fb\u4f4d\u5668\uff0c\u8abf\u6574\u8f38\u5165\u96fb\u58d3\uff0c\u6216\u662f\u6539\u8b8a\u653e\u5927\u589e\u76ca\u9054\u6210\u97f3\u91cf\u63a7\u5236\u3002\u5176\u539f\u7406\u70ba\u8f49\u52d5\u300c\u96fb\u5237\u300d\uff08wiper\uff09<\/span><span style=\"font-size: 75%;\">\uff0c\u6539\u8b8a\u96fb\u5237\u8207\u96fb\u963b\u5c64\u7684\u63a5\u89f8\u9ede\uff0c\u4f86\u6539\u8b8a\u5176\u96fb\u963b\u503c\uff0c\u518d\u6839\u64da\u5206\u58d3\u5b9a\u7406\u8abf\u6574\u8f38\u51fa\u96fb\u58d3\uff0c\u9054\u5230\u97f3\u91cf\u63a7\u5236\u7684\u76ee\u7684\u3002\u4e00\u500b\u53ef\u8b8a\u96fb\u963b\uff0c\u5f9e\u53f0\u5e63\u6578\u5143\u81f3\u842c\u5143\u90fd\u6709\uff0c\u5176\u54c1\u8cea\u6709\u8457\u5929\u58e4\u4e4b\u5225\u3002 \u4e00\u500b\u597d\u7684\u53ef\u8b8a\u96fb\u963b\uff0c\u5f9e\u57fa\u677f\u6750\u8cea\u3001\u78b3\u819c\u6216\u91d1\u5c6c\u819c\u96fb\u963b\u5c64\u7684\u88fd\u4f5c\uff0c\u5230\u96fb\u5237\u662f\u5426\u70ba\u8cb4\u91d1\u5c6c\u5408\u91d1\uff0c\u751a\u81f3\u96fb\u5237\u7684\u9020\u578b\uff0c\u8207\u96fb\u963b\u5c64\u63a5\u89f8\u7684\u96fb\u6c23\u7279\u6027\u3001\u8010\u78e8\u6027\u3001\u6703\u4e0d\u6703\u522e\u50b7\u96fb\u963b\u5c64\u7b49\uff0c\u8655\u8655\u662f\u5b78\u554f\u3002\u6240\u4ee5\u4e00\u500b\u770b\u4f3c\u7c21\u55ae\u7684\u6771\u897f\uff0c\u537b\u662f\u97f3\u97ff\u88fd\u4f5c\u8005\u6700\u982d\u75db\u7684\u5143\u4ef6\u4e4b\u4e00\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u597d\u7684\u53ef\u8b8a\u96fb\u963b\uff0c\u53ef\u4fe1\u8cf4\u5ea6\u5c24\u70ba\u91cd\u8981\uff0c\u96fb\u5237\u63a5\u9ede\u5fc5\u9808\u8010\u78e8\u3001\u4e0d\u6613\u6c27\u5316\uff0c\u7576\u7136\u4e00\u5b9a\u5f97\u597d\u807d\u624d\u884c\u3002\u4e0d\u904e\u9019\u88e1\u6709\u500b\u5e38\u898b\u7684\u554f\u984c\uff1a\u97f3\u91cf\u4e00\u822c\u90fd\u662f\u5de6\u53f3\u8072\u9053\u4e00\u8d77\u63a7\u5236\uff0c\u5927\u591a\u6578\u7684\u97f3\u97ff\u8a2d\u8a08\u662f\u4f7f\u7528\u96d9\u9023\u5f0f\u7684\u53ef\u8b8a\u96fb\u963b\u3002 \u4f46\u662f\u53ef\u8b8a\u96fb\u963b\u7d55\u975e\u60f3\u50cf\u4e2d\u7684\u898f\u5f8b\u8b8a\u5316\uff08\u4e00\u822c\u4f7f\u7528\u5c0d\u6578\u578b\uff0c\u6545\u4e0d\u4ee5\u662f\u5426\u7dda\u6027\u8ad6\u4e4b\uff09\uff0c\u8f49\u52d5\u540c\u6a23\u7684\u89d2\u5ea6\uff0c \u6709\u6642\u96fb\u963b\u503c\u8b8a\u5f97\u5feb\u4e00\u9ede\uff0c\u6709\u6642\u8b8a\u5f97\u6162\u4e00\u4e9b\u3002\u5c24\u5176\u662f\u96d9\u9023\u5f0f\u53ef\u8b8a\u96fb\u963b\uff0c\u8981\u5de6\u53f3\u8072\u9053\u5728\u8f49\u52d5\u5230\u6bcf\u4e00\u500b\u89d2\u5ea6\u4e0b\uff0c\u5176\u96fb\u963b\u503c\u90fd\u662f\u4e00\u81f4\u7684\uff0c\u53ef\u4ee5\u8aaa\u662f\u5b8c\u5168\u4e0d\u53ef\u80fd\u3002\u8d8a\u597d\u7684\u53ef\u8b8a\u96fb\u963b\u5de6\u53f3\u8072\u9053\u5dee\u7570\u8d8a\u5c0f\uff0c\u8b8a\u5316\u91cf\u8d8a\u5e73\u9806\u7f77\u4e86\u3002<\/span><\/h3>\n<h3 style=\"font-size: 20.16px;\"><img loading=\"lazy\" class=\"wp-image-888 alignleft\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.57-559x400.png\" alt=\"\" width=\"254\" height=\"182\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.57-559x400.png 559w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.57-510x365.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.13.57.png 744w\" sizes=\"(max-width: 254px) 100vw, 254px\" \/><\/h3>\n<blockquote>\n<p><span style=\"color: #808080;\"><em><span style=\"font-size: 75%;\">\u50b3\u7d71\u985e\u6bd4\u97f3\u63a7\u4f7f\u7528\u7684\u53ef\u8b8a\u96fb\u963b\u63a1\u7528\u300c\u8f49\u52d5\u96fb\u5237\u300d \u65b9\u5f0f\u5f88\u96e3\u9054\u5230\u7406\u60f3\u7684\u7cbe\u78ba\u5ea6\uff0c\u96d9\u9023\u5f0f\u53ef\u8b8a\u96fb\u963b\u66f4 \u96e3\u4ee5\u7cbe\u78ba\u63a7\u5236\u5de6\u53f3\u8072\u9053\u7684\u4e00\u81f4\uff0c\u6545\u6703\u9020\u6210\u5f88\u591a\u554f\u984c\u3002<\/span><\/em><\/span><\/p>\n<\/blockquote>\n<h3>\u00a0<\/h3>\n<h3>\u00a0<\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u90a3\u9ebc\u4e0d\u597d\u7684\u53ef\u8b8a\u96fb\u963b\u6703\u51fa\u4ec0\u9ebc\u554f\u984c\u5462\uff1f\u7522\u54c1\u58fd\u547d\u77ed\u3001\u6545\u969c\u7387\u9ad8\u3001\u6c92\u904e \u5e7e\u5e74\u5c31\u767c\u751f\u63a5\u9ede\u6c27\u5316\u6216\u63a5\u89f8\u4e0d\u826f\u7684\u73fe\u8c61\u3002\u4ee5\u53ca\u5de6\u53f3\u8072\u9053\u7684\u5e73\u8861\u5ea6\u554f\u984c\u3002 \u90e8\u5206\u5ee0\u5546\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u4fbf\u5728\u5de6\u53f3\u8072\u9053\u52a0\u5165\u4e86\u88dc\u511f\u53ef\u8b8a\u96fb\u963b\uff0c\u6216\u4e7e \u8106\u5404\u81ea\u7368\u7acb\u63a7\u5236\u3002\u56e0\u6b64\u5c31\u6709\u4eba\u60f3\u5230\u4f7f\u7528\u7d1a\u9032\u5f0f\u96fb\u4f4d\u5668\u4f86\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\u3002 \u6bcf\u500b\u6a94\u4f4d\u7684\u96fb\u963b\u90fd\u662f\u9810\u5148\u7be9\u9078\u904e\uff0c\u56b4\u683c\u7ba1\u63a7\u8aa4\u5dee\u3002\u53ef\u60dc\u50f9\u683c\u4e0d\u6590\u3001\u6a94\u4f4d\u6709\u9650\uff0c\u5f88\u96e3\u505a\u5230\u50cf\u53ef\u8b8a\u96fb\u963b\u4e00\u6a23\u53ef\u4ee5\u9023\u7e8c\u6027\u7684\u8abf\u6574\u97f3\u91cf\uff0c\u6cc1\u4e14\u9084\u662f\u4e00\u6a23\u6709\u63a5\u9ede\u8001\u5316\u7684\u554f\u984c\u3002\u5c0f\u5c0f\u4e00\u500b\u96f6\u4ef6\u537b\u727d\u626f\u51fa\u90a3\u9ebc\u591a\u7684\u9ebb\u7169\uff0c\u97f3\u91cf\u63a7\u5236\u8ff4 \u8def\u662f\u8072\u97f3\u8a0a\u865f\u7684\u5fc5\u7d93\u4e4b\u8def\uff0c\u4e5f\u662f\u5f71\u97ff\u97f3\u8cea\u597d\u58de\u7684\u95dc\u9375\u5143\u7d20\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u8b1b\u4e86\u4e00\u5927\u5806\u985e\u6bd4\u5f0f\u7684\u97f3\u91cf\u63a7\u5236\uff0c\u4e5f\u8ac7\u5230\u4e86\u5143\u4ef6\u9078\u7528\u8207\u8a2d\u8a08\u4e0a\u7684\u56f0\u96e3\uff0c\u5de5\u7a0b\u5e2b\u5011\u53c8\u628a DSP \u642c\u51fa\u4f86\u6551\u706b\u3002\u56e0\u61c9\u73fe\u4e0b\u5927\u591a\u6578\u90fd\u662f\u6578\u4f4d\u97f3\u6e90\uff0c\u8981\u5728\u6578\u4f4d\u7aef\u52d5\u624b\u8173\uff0c\u76f4\u63a5\u653e\u5927\u6216\u7e2e\u5c0f\u6bcf\u4e00\u7b46\u97f3\u6a02\u6578\u4f4d\u5167\u5bb9(RAW data)\uff0c\u7d93\u7531DAC \u505a\u6578\u4f4d\u985e\u6bd4\u8f49\u63db\u7522\u751f\u5c0d\u61c9\u7684\u96fb\u6d41\u6216\u96fb\u58d3\uff0c\u9019\u4e0d\u5c31\u505a\u5230\u97f3\u91cf\u63a7\u5236\u4e86\u55ce\uff1f\u53c8\u4e0d\u7528\u64d4\u5fc3\u96a8\u8457\u6642\u9593\u6d41\u901d\uff0c\u96f6\u4ef6\u8001\u5316\uff0c\u4e5f\u4e0d\u7528\u518d\u7169\u60f1\u5de6\u53f3\u8072\u9053\u4e0d\u5339\u914d\u7684\u554f\u984c\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u6cc1\u4e14\u5229\u7528 DSP \u7684\u904b\u7b97\uff0c\u5c31\u7b97\u8981\u505a\u5fae\u5c0f\u523b\u5ea6\u7684\u8abf\u6574\u4e5f\u4e0d\u6210\u554f\u984c\u3002\u8207\u97f3\u91cf\u76f8\u95dc\u7684 \u63a7\u5236\u904b\u7b97\u9084\u6709\u81ea\u52d5\u97f3\u91cf\u63a7\u5236\u300c\u52d5\u614b\u7bc4\u570d\u58d3\u7e2e\u300d(Dynamic Range Compression\uff0c DRC)\uff0c\u6216\u662f\u907f\u514d\u904e\u5927\u97f3\u91cf\u9020\u6210\u524a\u5cf0\u5931\u771f\u7684 Soft-clipping \uff08\u8edf\u6027\u5207\u524a\uff09\u90fd\u53ef\u4ee5\u5229\u7528 DSP \u5b8c\u6210\u3002\u7576\u7136\u4e26\u4e0d\u662f\u985e\u6bd4\u96fb\u8def\u7121\u6cd5\u5b8c\u6210\u9019\u4e9b\u529f\u80fd\uff0c\u800c\u662f\u9700\u8981\u8a31\u591a\u984d\u5916\u7684\u96fb\u5b50\u8ff4\u8def\u624d\u80fd\u5be6\u73fe\u3002\u5728\u8b1b\u6c42\u300cSimple is best\u300d\u7684\u73fe\u4ee3\uff0c\u8907\u96dc\u7684\u96fb\u8def\u5c0d\u97f3\u8cea\u9020\u6210\u7684\u5f0a\u53ef\u80fd\u9060\u5927\u65bc\u6240\u4f86\u7684\u5229\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u8aaa\u4e86\u4e00\u5927\u5806\u6578\u4f4d\u97f3\u91cf\u63a7\u5236\u7684\u597d\u8655\uff0c\u4e5f\u8981\u4f86\u8ac7\u8ac7\u5b83\u7684\u9650\u5236\u3002\u5148\u524d\u6211\u5011\u8aaa\u5230 \u4e86\u8a0a\u865f\u5728\u6578\u4f4d\u5316\u904e\u7a0b\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6b65\u9a5f\u2500 \u91cf\u5316\u3002\u82e5\u662f\u91cf\u5316\u6642\u6240\u4f7f\u7528\u7684\u89e3\u6790\u5ea6\uff08bit\u6578\uff09\u592a\u4f4e\uff0c\u518d\u7d93\u904e\u6578\u4f4d\u97f3\u91cf\u904b\u7b97\uff0c\u4fbf\u5bb9\u6613\u9020\u6210\u52d5\u614b\u7bc4\u570d\u58d3\u7e2e\u3002\u76f8\u8f03\u4e4b\u4e0b\uff0c\u50b3\u7d71\u7684\u985e\u6bd4\u5f0f\u97f3\u91cf\u63a7\u5236\uff0c\u5728\u9019\u4e00\u9ede\u4e0a\u5c31\u6709\u7d55\u5c0d\u6027\u7684\u512a\u52e2\u3002\u4e0d\u904e\u53b2\u5bb3\u7684 DSP \u5de5\u7a0b\u5e2b\u9084\u662f\u6709\u5c0d\u7b56\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u9996\u5148\uff0c\u5c07\u97f3\u6e90\u8cc7\u6599\u9810\u505a\u64f4\u5c55\u4f4d\u5143\u6df1\u5ea6\uff08<\/span><span style=\"font-size: 75%;\">bit-depth\uff09\uff0c\u518d\u9032\u884c\u904b\u7b97\u3002\u8a66\u60f3\u4e00 \u500b 0dB \u7684 16bit \u97f3\u6a02\u5167\u5bb9\uff0c\u7d93\u904e -60dB \u7684\u8870\u6e1b\uff0c\u52d5\u614b\u7bc4\u570d\u5927\u5e45\u7e2e\u6e1b\u5230 96 &#8211; 60 = 36dB\uff08\u7d04\u70ba 6bit \u7684\u89e3\u6790\u5ea6\uff09\u3002\u4e0d\u904e\u8981\u662f\u5148\u5c07\u97f3\u6a02\u5167\u5bb9\u505a\u4f4d\u5143\u64f4\u5c55\u6210 24bit\uff0c \u90a3\u9ebc\u5728\u540c\u6a23\u7684\u689d\u4ef6\u4e0b\u4fbf\u9084\u6709 144-60 = 84dB \u7684\u52d5\u614b\u7bc4\u570d\uff0c\u5728\u5be6\u7528\u4e0a\u5c31\u63a5\u8fd1\u4e86 \u985e\u6bd4\u5f0f\u97f3\u91cf\u63a7\u5236\u80fd\u5920\u4fdd\u6709\u7684\u52d5\u614b\u7bc4\u570d\u3002\u8981\u662f\u66f4\u9032\u4e00\u6b65\u64f4\u5c55\u6210 32bit\uff0c\u90a3\u9ebc\u52d5\u614b \u7bc4\u570d\u9019\u500b\u554f\u984c\u4fbf\u4e0d\u518d\u662f\u6578\u4f4d\u97f3\u91cf\u63a7\u5236\u7684\u8edf\u808b\u3002<\/span><\/h3>\n<p>\u00a0<\/p>\n<h3><span style=\"font-size: 100%; color: #666699;\">\u53d6\u6a23\u7387\u8f49\u63db(Sample Rate Convert\uff0cSRC)<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u5728\u6578\u4f4d\u5316\u7684\u904e\u7a0b\u4e2d\u9084\u6709\u53e6\u4e00\u500b\u91cd\u8981\u6b65\u9a5f-<strong><em><span style=\"color: #0000ff;\">\u53d6\u6a23<\/span><\/em><\/strong>\u3002\u53d6\u6a23\u7684\u983b\u7387\u5373\u70ba\u53d6\u6a23\u7387 (Fs)\u3002\u6839\u64da\u300c\u5948\u594e\u65af\u7279\u53d6\u6a23\u5b9a\u7406\u300d\uff08Nyquist Sampling Theorem\uff09\uff0c\u7c21\u8981\u8aaa\u660e\u5982\u4e0b\uff1a\u6578\u4f4d\u8a0a\u865f\u53ef\u9084\u539f\u51fa\u983b\u7387\u5c0f\u65bc\u4e8c\u5206\u4e4b\u4e00\u53d6\u6a23\u7387\u7684\u985e\u6bd4\u8a0a\u865f\u3002\u4f46\u662f\u5728\u8a0a\u865f\u91cd\u5efa\uff08\u9084\u539f\uff09\u6642\uff0c\u6703\u51fa\u73fe\u300c\u6df7\u758a\u300d\uff08aliasing\uff09\u5e72\u64fe\u3002\u6240\u4ee5\u70ba\u4e86\u6d88\u9664\u6b64\u4e00\u5e72\u64fe\uff0c \u5de5\u7a0b\u5e2b\u5fc5\u9808\u5728\u9084\u539f\u904e\u7a0b\u4e2d\u52a0\u5165\u300c\u6297\u6df7\u758a\u6ffe\u6ce2\u5668\u300d(Anti-aliasing filter)\u3002\u4e5f\u5c31 \u662f\u4f48\u5efa\u5728 DAC \u4e4b\u5f8c\u7684 LPF\uff08\u4f4e\u901a\u6ffe\u6ce2\uff09<\/span><span style=\"font-size: 75%;\">\uff0c\u7528\u4ee5\u6ffe\u9664\u9ad8\u65bc 1\/2Fs \u7684\u8a0a\u865f\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0 \u4f46\u662f\u9019\u88e1\u5b58\u5728\u4e00\u500b\u554f\u984c\uff1a\u5728 21 \u4e16\u7d00\u7684\u4eca\u5929\uff0c\u6709\u8457\u5404\u7a2e\u4e0d\u540c\u53d6\u6a23\u7387\u7684\u97f3\u6e90 \u6a94\uff0c\u4e5f\u5c31\u610f\u5473\u8457\u8981\u6709\u4e0d\u540c\u6ffe\u6ce2\u983b\u7387\u7684 LPF \u7f6e\u65bc DAC \u8ff4\u8def\u7576\u4e2d\u3002\u53ef\u60dc\u7684\u662f\uff0c\u5728 \u8a0a\u865f\u9014\u5f91\u4e2d\u904e\u4e86 DAC \u4e4b\u5f8c\u4fbf\u5c6c\u65bc\u985e\u6bd4\u9818\u57df\uff0c\u7576\u7136\u9019\u500b LPF \u4e5f\u5c6c\u65bc\u985e\u6bd4\u6ffe\u6ce2\u5668 \u7684\u7bc4\u7587\u3002\u985e\u6bd4\u6ffe\u6ce2\u5668\u9760\u8457\u4e0d\u540c\u7684\u96fb\u963b\u3001\u96fb\u5bb9\u4f86\u8abf\u6574\u6ffe\u6ce2\u622a\u6b62\u983b\u7387\uff0c\u4e5f\u5c31\u662f\u8aaa \u4e00\u65e6\u8a2d\u5b9a\u597d\u96fb\u963b\/\u96fb\u5bb9\u503c\uff0c\u6ffe\u6ce2\u5668\u7684\u622a\u6b62\u983b\u7387\u4fbf\u88ab\u56fa\u5b9a\u4e0b\u4f86\uff0c\u7121\u6cd5\u66f4\u6539\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u6240\u4ee5\u8981\u662f\u6ffe\u6ce2\u622a\u6b62\u983b\u7387\u8a2d\u9ad8\u4e86\uff0c\u5c0d\u65bc\u64ad\u653e\u9ad8\u53d6\u6a23\u7387\u6a94\u6848\u56fa\u7136\u518d\u597d\u4e5f\u4e0d\u904e\uff0c\u53ef\u8981\u662f\u63db\u6210\u64ad\u653e\u4f4e\u53d6\u6a23\u7387\u6a94\u6848\u6642\uff0c\u6709\u8457\u8f03\u9ad8\u6ffe\u6ce2\u622a\u6b62\u983b\u7387\u7684 LPF \u4fbf\u4e0d\u80fd\u6709\u6548 \u5730\u5c0d\u65bc\u6df7\u758a\u8a0a\u865f\u9032\u884c\u6291\u5236\uff0c\u53cd\u4e4b\uff0c\u8f03\u4f4e\u6ffe\u6ce2\u622a\u6b62\u983b\u7387\u7684 LPF \u5c0d\u65bc\u91cd\u64ad\u9ad8\u53d6\u6a23 \u7387\u6a94\u6848\u6642\uff0c\u4fbf\u6703\u5c07\u539f\u672c\u4f60\u6240\u5728\u610f\u7684\u9ad8\u983b\u8a0a\u865f\u4e88\u4ee5\u6ffe\u9664\uff0c\u800c\u5931\u53bb\u64ad\u653e\u9ad8\u53d6\u6a23\u7387 \u6a94\u6848\u7684\u76ee\u7684\u3002\u9762\u5c0d\u9019\u6a23\u9032\u9000\u5169\u96e3\u7684\u60c5\u6cc1\uff0cDSP \u5c31\u6d3e\u4e0a\u7528\u5834\u3002\u5229\u7528\u53d6\u6a23\u7387\u8f49\u63db \u904b\u7b97\uff0c\u5c07\u53d6\u6a23\u7387\u8f49\u63db\u81f3\u8f03\u9ad8\u7684\u983b\u7387\uff0c\u4f8b\u5982\u628a\u8f38\u5165 DAC \u7684\u53d6\u6a23\u7387\u4e00\u5f8b\u8f49\u63db\u81f3 192kHz\uff0c\u53d6\u6a23\u7387\u7d71\u4e00\u4e86\uff0cLPF \u7684\u8a2d\u8a08\u4e5f\u5c31\u53ef\u4ee5\u56fa\u5b9a\u4e0b\u4f86\u3002\u90a3\u9ebc\u4e0a\u8ff0\u7684\u554f\u984c\u4fbf\u53ef\u8fce\u5203\u800c\u89e3\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u9664\u6b64\u4e4b\u5916\uff0c\u9084\u6709\u4e00\u4e9b\u5e38\u898b\u7684\u7528\u9014\u3002\u5c31\u50cf\u662f\u4f7f\u7528\u96fb\u8166\u7cfb\u7d71\u64ad\u653e\u97f3\u6a02\u3002\u53ef\u80fd\u64ad\u653e\u7684\u662f 48kHz \u7684\u97f3\u6a02\u5167\u5bb9\uff0c\u4e00\u500b\u7cfb\u7d71\u63d0\u793a\u97f3\u300c\u53ee\u549a\u300d\u97ff\u8d77\u3002\u6b64\u6642\u4f5c\u696d\u7cfb\u7d71\u7684\u5f8c\u53f0\u53ef\u8981\u5fd9\u58de\u4e86\u3002\u56e0\u70ba\u9019\u500b\u7cfb\u7d71\u63d0\u793a\u97f3\u591a\u534a\u662f 44.1kHz \u6240\u9304\u88fd\u7684\u3002\u5169\u500b\u4e0d\u540c\u53d6\u6a23\u7387\u7684\u97f3\u6e90\u662f\u7121\u6cd5\u76f4\u63a5\u9032\u884c\u6df7\u97f3\uff0c\u6240\u4ee5\u4f5c\u696d\u7cfb\u7d71\u9700\u8981\u4f5c\u53d6\u6a23\u7387\u8f49\u63db\uff0c\u5c07\u53d6\u6a23\u7387\u7d71\u4e00\uff0c\u518d\u628a\u97f3\u6a02\u8207\u7cfb\u7d71\u63d0\u793a\u97f3\u9032\u884c\u6df7\u97f3\u5f8c\u64ad\u653e\u3002\u4e5f\u56e0\u6b64\u5e38\u807d\u5230\u67d0\u500b\u96fb\u8166\u4f5c\u696d\u7cfb\u7d71\u64ad\u653e\u54c1\u8cea\u512a\u65bc\u5176\u4ed6\u7cfb\u7d71\u7684\u539f\u56e0\u4e5f\u5c31\u4e0d\u8a00\u800c\u55bb\u4e86\u3002\u56e0\u70ba\u540c\u6a23\u662f SRC\uff0c\u54c1\u8cea\u597d\u58de\u5404\u6709\u9ad8\u4f4e\u3002\u8f49\u63db\u54c1\u8cea\u597d\u7684\u9700\u8981\u8f03\u591a\u7684\u904b\u7b97\uff0c\u6d88\u8017 CPU \u8cc7\u6e90\u4e5f\u5c31\u6bd4\u8f03 \u9ad8\u3002\u53d6\u6368\u4e4b\u9593\uff0c\u5c31\u770b\u8a2d\u8a08\u8005\u504f\u91cd\u4f55\u8005\u4e86\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u97f3\u6a02\u7de8\u8f2f\u8207\u5f8c\u88fd\u6642\u7528\u7684\u5c31\u66f4\u591a\u4e86\u3002\u91dd\u5c0d\u4e0d\u540c\u53d6\u6a23\u7387\u7684\u97f3\u6e90\u6a94\u9032\u884c\u7de8\u8f2f\u6df7 \u97f3\uff0c\u52e2\u5fc5\u8981\u4f5c\u53d6\u6a23\u7387\u8f49\u63db\u3002\u7136\u800c\u5728\u5f8c\u88fd\u5b8c\u6210\uff0c\u6e96\u5099\u767c\u884c\u524d\u9084\u662f\u8981\u518d\u4f5c\u4e00\u6b21\u53d6 \u6a23\u7387\u8f49\u63db\u3002\u56e0\u70ba\u73fe\u4e0b\u5927\u591a\u6578\u7684\u9304\u97f3\u591a\u63a1\u7528 48kHz \u6216 96kHz \u53d6\u6a23\u7387\uff0c\u4f46\u767c\u884c\u91cf \u6700\u5927\u7684\u683c\u5f0f\u9084\u662f\u4ee5 CD \u7684 44.1kHz \u70ba\u4e3b\u3002\u6240\u4ee5\u6700\u7d42\u9084\u662f\u6703\u5229\u7528\u53d6\u6a23\u7387\u8f49\u63db\u7522\u751f \u51fa\u4e00\u500b CD \u683c\u5f0f\u6a94\u6848\u505a\u5546\u696d\u767c\u8868\u7684\u6700\u7d42\u7248\u672c\u3002<\/span><\/h3>\n<p>\u00a0<\/p>\n<h3><span style=\"font-size: 100%; color: #666699;\">\u964d\u566a(Noise-cancelling)<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">DSP \u9084\u6709\u4e00\u500b\u5e38\u898b\u7684\u61c9\u7528\u5c31\u662f\u964d\u566a\uff0c\u73fe\u5728\u7684\u624b\u6a5f\u6216\u5e73\u677f\u96fb\u8166\uff0c\u5927\u591a\u4f7f\u7528\u591a \u9ea5\u514b\u98a8\u6536\u97f3\u3002\u4f7f\u7528\u591a\u9ea5\u514b\u98a8\u6536\u97f3\uff0c\u76ee\u7684\u4e26\u975e\u8981\u6536\u9304\u7acb\u9ad4\u8072\u6548\u679c\uff0c\u4e3b\u8981\u9084\u662f\u70ba \u4e86\u80fd\u5920\u5229\u7528\u4e0d\u540c\u9ea5\u514b\u98a8\u6536\u96c6\u5230\u7684\u8072\u97f3\u8cc7\u8a0a\u4ea4\u7531 DSP \u9032\u884c\u4fe1\u865f\u8655\u7406\uff0c\u53bb\u9664\u6389\u8a9e \u97f3\u88e1\u9762\u7684\u566a\u97f3\uff0c\u5f97\u5230\u6e05\u6670\u7684\u901a\u8a71\u3002<\/span><\/h3>\n<div class=\"is-divider divider clearfix\" style=\"margin-top:0.6em;margin-bottom:0.6em;\"><\/div>\n\n<div class=\"row\"  id=\"row-943812829\">\n\n\n\t<div id=\"col-1578282600\" class=\"col medium-11 small-12 large-11 col-divided\"  >\n\t\t\t\t<div class=\"col-inner text-left\" style=\"background-color:rgb(154, 183, 167);\" >\n\t\t\t\n\t\t\t\n\n<h2><strong><span style=\"font-size: 75%; color: #f7fcf9; background-color: #3f733f;\">\u00a0\u5948\u594e\u65af\u7279\u53d6\u6a23\u5b9a\u7406 Nyquist Sampling Theorem<\/span><\/strong><\/h2>\n<h3><span style=\"font-size: 75%; color: #f7fcf9;\">\u6578\u4f4d\u8a0a\u865f\u53d6\u6a23\u7684\u57fa\u672c\u539f\u7406\u5c31\u662f\u300c\u5948\u594e\u65af\u7279\u53d6\u6a23\u5b9a\u7406\u300d\uff0c\u7531\u745e\u5178\u88d4\u7f8e\u570b\u7269\u7406\u5b78\u5bb6\u54c8\u91cc\u5948\u594e\u65af\u7279 (Harry Nyquist\uff0c1889-1976)\u65bc 1928 \u5e74\u63d0\u51fa\uff0c\u7c21\u55ae\u7684\u8aaa\u5c31\u662f\u5728\u8a0a\u865f\u53d6\u6a23\u6642\uff0c\u53d6\u6a23\u7684\u983b\u7387\u5fc5\u9808 \u8981\u70ba\u539f\u59cb\u8a0a\u865f\u983b\u7387\u7684\u4e8c\u500d\u4ee5\u4e0a\u3002\u4ee5 CD \u70ba\u4f8b\uff0c\u5b83\u7684\u53d6\u6a23\u983b\u7387 44.1kHz\uff0c\u5c31\u53ea\u80fd\u9084\u539f 22.05kHz \u7684\u983b \u7387\uff0c\u4e5f\u5c31\u662f\u300c\u7406\u8ad6\u4e0a\u300d\u4eba\u8033\u807d\u89ba\u7684\u4e0a\u9650\u3002<\/span><\/h3>\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1578282600 > .col-inner {\n  padding: 22px 24px 20px 33px;\n  margin: 0px 8px 0px -2px;\n  border-radius: 6px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n<\/div>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 <img loading=\"lazy\" class=\" wp-image-887 alignleft\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.15.44-512x400.png\" alt=\"\" width=\"403\" height=\"314\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.15.44-512x400.png 512w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.15.44-510x398.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.15.44-768x599.png 768w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.15.44.png 884w\" sizes=\"(max-width: 403px) 100vw, 403px\" \/> <\/span><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u53e6\u5916\u9019\u4e9b\u5e74\u6240\u6d41\u884c\u7684\u964d\u566a\u8033\u6a5f\uff0c\u4e5f\u6709\u7528\u5230 DSP \u6280\u8853\u3002\u6700\u65e9\u5728\u4e8c\u6b21\u5927\u6230\u671f\u9593\uff0c\u7a7a\u6230\u6210\u70ba\u5f71\u97ff\u6230\u722d\u7684\u5229\u5668\u3002\u4e0d\u904e\u7576\u6642\u98db\u884c\u5668\u7684\u8a2d\u8a08\u6c34\u6e96\u4e0d\u5982\u73fe\u5728\uff0c \u98db\u884c\u54e1\u5728\u5435\u96dc\u7684\u6a5f\u8259\u4e2d\u5982\u4f55\u6e05\u695a\u5730\u8207\u5176\u4ed6\u6a5f\u7d44\u4eba\u54e1\u6e9d\u901a\uff0c\u4e43\u81f3\u65bc\u8207\u5730\u9762\u5854\u53f0\u7684\u806f\u7e6b\uff0c\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u4e8b\u3002\u56e0\u6b64\u964d\u566a\u8033\u6a5f\u5c0d\u65bc\u98db\u884c\u54e1\u4f86\u8aaa\uff0c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u6cd5\u5bf6\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u65e9\u671f\u964d\u566a\u8033\u6a5f\u8a2d\u8a08\u4f7f\u7528\u985e\u6bd4\u96fb\u8def\u8a2d\u8a08\uff0c\u96d6\u7136\u9054 \u5230\u4e00\u5b9a\u7684\u6548\u679c\uff0c\u4f46\u73fe\u4eca\u4f7f\u7528 DSP \u6578\u4f4d\u65b9\u5f0f\u9032\u884c \u964d\u566a\u904b\u7b97\u7684\u7d50\u679c\uff0c\u66f4\u53ef\u4ee5\u505a\u5230\u91dd\u5c0d\u7279\u5b9a\u8072\u97f3\u6216\u7279 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\u767c\u63ee\u7684\u7a7a\u9593\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u591a\u8072\u9053\u74b0\u7e5e\u64f4\u5927\u6a5f\u5167\u5efa\u7684\u6a21\u64ec\u74b0\u7e5e\u97f3\u5834\u6548\u679c\uff0c\u4e5f\u662f DSP \u904b\u7b97\u80fd\u529b\u4e0b\u7684\u5f37\u9805\u3002\u73fe\u5728\u6700\u65b0\u7684 DSP \u6280\u8853\uff0c\u9084\u53ef\u4ee5\u900f\u904e AI \u5206\u6790\u4e0d\u540c\u7684\u5834\u666f\uff0c\u5373\u6642\u5f37\u8abf\u4eba\u7269\u5c0d\u767d\uff0c\u6216\u512a\u5316\u74b0\u7e5e\u8072\u7684\u6548\u679c\uff0c\u914d\u5408\u756b\u9762\u7d66\u4e88\u6d88\u8cbb\u8005\u6700\u4f73\u7684\u8072\u5149\u9ad4\u9a57\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 <img loading=\"lazy\" class=\" wp-image-889 alignright\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.17.39-489x400.png\" alt=\"\" width=\"309\" height=\"252\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.17.39-489x400.png 489w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.17.39-510x418.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.17.39-768x629.png 768w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.17.39.png 816w\" sizes=\"(max-width: 309px) 100vw, 309px\" \/><\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u9084\u6709\u9019\u5e7e\u5e74\u5e38\u898b\u7684\u85cd\u7259\u5587\u53ed\uff0c\u5c0f\u5c0f\u7684\u55ae\u9ad4\u5728\u6709\u9650\u7684\u7a7a\u9593\u88e1\uff0c\u786c\u662f\u64e0\u51fa\u4e0d\u53ef\u601d\u8b70\u7684\u4f4e\u97f3\u51fa\u4f86\uff0c\u9760\u7684\u4e5f\u662f DSP \u7684\u589e\u5f37\u4f4e\u983b\u3002\u66f4\u6709\u4eba\u5229\u7528 DSP \u904b\u7b97\uff0c\u63d0\u9ad8\u91cd\u4f4e\u97f3\u7684\u8ae7\u6ce2\u6210\u5206\uff0c\u5f62\u6210\u5fc3\u7406\u8072\u5b78\u4e0a\u7684\u300c\u865b\u64ec\u300d\u91cd\u4f4e\u97f3\u3002\u96d6\u7136\u97f3\u8cea\u4e0a\u4e0d\u76e1\u771f\u5be6\uff0c\u4f46\u4e5f\u7a0d\u7a0d\u5f4c\u88dc\u4e86\u5c0f\u5c3a\u5bf8\u55ae\u9ad4\u7121\u6cd5\u73fe\u91cd\u4f4e\u97f3\u7684\u7a98\u5883\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u6b64\u5916\uff0c\u8fd1\u5e74\u4f86\u84ec\u52c3\u767c\u5c55\u7684\u865b\u64ec\u5be6\u5883 VR\u3002\u5728\u97f3\u983b\u9805\u76ee\u4e0a\u4e5f\u6709 DSP \u767c\u63ee\u7684\u7a7a\u9593\u3002\u7576\u64cd\u4f5c\u8005\u8f49\u8eab\uff0c\u986f\u793a\u5668\u8ddf\u8457\u8f49\u52d5\u773c\u524d\u7684\u666f\u7269\uff0c\u5982\u679c\u6b64\u6642\u8072\u97f3\u8a0a\u865f\u6c92\u6709\u505a \u76f8\u5c0d\u61c9\u7684\u6539\u8b8a\uff0c\u8c48\u4e0d\u662f\u5927\u5927\u964d\u4f4e\u4e86\u64cd\u4f5c\u8005\u7684\u611f\u5b98\u9ad4 \u9a57\u3002\u6240\u4ee5\u9760\u8457\u97f3\u983b DSP \u7684\u5373\u6642\u904b\u7b97\uff0c\u4f7f\u5f97 VR \u5728\u6574\u9ad4\u8868\u73fe\u4e0a\u66f4\u53ef\u4ee5\u8b93\u4eba\u6709\u8eab\u6b77\u5176\u5883\u7684\u611f\u53d7\u3002<\/span><\/h3>\n<h3>\u00a0<\/h3>\n<h3><span style=\"font-size: 100%; color: #666699;\">\u7de8\u78bc\u8207\u89e3\u78bc\uff08Codec\uff09<\/span><\/h3>\n<blockquote>\n<h3><span style=\"font-size: 75%;\">\u00a0<em><span style=\"font-size: 75%; color: #808080;\">\u7121\u7dda\u85cd\u7259\u50b3\u8f38\u6280\u8853\u5c31\u662fDSP\u6280\u8853\u6700\u7d93\u5178\u7684\u61c9\u7528\u4e4b\u4e00\u3002<\/span><\/em><img loading=\"lazy\" class=\"wp-image-897 alignright\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.19.40-497x400.png\" alt=\"\" width=\"246\" height=\"198\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.19.40-497x400.png 497w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.19.40-510x410.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/\u622a\u5716-2021-03-20-18.19.40.png 666w\" sizes=\"(max-width: 246px) 100vw, 246px\" \/><\/span><\/h3>\n<\/blockquote>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a01990 \u5e74\u4ee3\u5f8c\u671f\uff0cMP3 \u6709\u8457\u9ad8\u58d3\u7e2e\u6bd4\uff0c\u97f3\u8cea\u53c8\u80fd\u88ab\u5927\u773e\u6240\u63a5\u53d7\u3002\u5728\u7576\u5e74\u5132\u5b58\u5a92\u9ad4\u50f9\u683c\u4e0d\u6590\u7684\u5e74\u4ee3\uff0c\u58d3\u7e2e\u8cc7\u6599\u8b8a\u6210\u4e00\u7a2e\u986f\u5b78\u3002\u7dca\u63a5\u8457\uff0c\u7db2\u8def\u6642\u4ee3\u4f86\u81e8\uff0c\u521d\u671f\u6709\u9650\u7684\u7db2\u8def\u983b\u5bec\uff0c\u66f4\u52a0\u4f9d\u8cf4\u4f4d\u5143\u7387\u76f8\u5c0d\u8f03\u5c0f\u7684\u58d3\u7e2e\u683c\u5f0f\u8cc7\u6599\u3002\u65e5\u5f8c\u4e5f\u767c\u5c55\u51fa\u5404\u5f0f\u5404\u6a23\u7684\u58d3\u7e2e\u683c\u5f0f\uff0c\u9019\u88e1\u53c8\u5340\u5206\u6210\u6709\u640d\u58d3 \u7e2e\u8207\u7121\u640d\u58d3\u7e2e\uff0c\u65e2\u7136\u6709\u58d3\u7e2e\u683c\u5f0f\u7684\u5b58\u5728\u4e5f\u5c31\u9700\u8981\u7de8\u78bc\u8207\u89e3\u78bc\u7b49\u904b\u7b97\u3002\u7121\u7591\u7684\uff0cDSP \u662f\u6b64\u985e\u904b\u7b97\u7684\u6700\u4f73\u57f7\u884c\u8005\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u53e6\u5916\u5982\u675c\u6bd4\u5be6\u9a57\u5ba4 Dolby \u8207 dts \u7b49\uff0c\u4e5f\u958b\u767c\u51fa\u96fb\u5f71\u76f8\u95dc\u7684\u591a\u8072\u9053\u8072\u97f3\u58d3\u7e2e\u6280\u8853\u3002\u5728\u5bb6\u7528\u9818\u57df\uff0cDVD\u3001BD\u3001UHD BD\uff0c\u4ee5\u53ca\u6578\u4f4d\u96fb\u8996\u5ee3\u64ad\uff08DAB\uff09\u7b49\uff0c\u90fd\u53ef\u4ee5\u898b\u5230\u591a\u8072\u9053\u58d3\u7e2e\u6280\u8853\u7684\u61c9\u7528\u3002\u986f\u7136\u9019\u4e5f\u9700\u8981 DSP \u52a0\u4ee5\u89e3\u78bc\uff0c \u9084\u539f\u51fa\u591a\u8072\u9053\u7684\u97f3\u983b\u8cc7\u8a0a\u4f9b\u591a\u8072\u9053\u74b0\u7e5e\u64f4\u5927\u6a5f\u4f7f\u7528\u3002<\/span><\/h3>\n<h3><span style=\"font-size: 75%;\">\u00a0 \u00a0 \u00a0\u8fd1\u5e74\u4f86\u85cd\u7259\u97f3\u97ff\u5e7e\u4e4e\u6210\u70ba\u97f3\u97ff\u8a2d\u5099\u7684\u6a19\u6e96\u914d\u5099\uff0c\u70ba\u4e86\u964d\u4f4e\u901a\u8a0a\u7684\u4f4d\u5143\u7387\uff0c\u4fbf\u4f7f\u7528\u4e86\u58d3\u7e2e\u8207\u89e3\u58d3\u7e2e\u7684\u6280\u8853\u3002\u5728\u85cd\u7259\u97f3\u97ff\u4e2d\u5e38\u898b\u7684\u58d3\u7e2e\u683c\u5f0f\u6709 SBC\u3001AAC \u53ca\u9ad8\u901a\u7684 aptX\u3002\u7576\u7136\u4e5f\u6709\u652f\u63f4\u8f03\u9ad8\u4f4d\u5143\u7387\u7684 aptX HD\u3001 LDAC\u3001LHDC \u7b49\u3002\u8981\u6ce8\u610f\u7684\u662f\uff0c\u58d3\u7e2e\u8207\u89e3\u58d3\u7e2e\u5fc5\u9808\u5c0d\u61c9\u5b58\u5728\u624d\u53ef\u4ee5\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u6d88\u8cbb\u8005\u8981\u662f\u8cfc\u8cb7\u4e86\u652f\u63f4\u53ef\u89e3\u78bc aptX \u7684\u85cd\u7259\u5587\u53ed\uff0c\u4e5f\u8981\u78ba\u8a8d\u5145\u7576 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class=\"col-inner\" style=\"background-color:rgb(167, 185, 171);\" >\n\t\t\t\n\t\t\t\n\n<h2><span style=\"font-size: 75%; background-color: #3f733f; color: #fafafa;\">\u675c\u6bd4\u5be6\u9a57\u5ba4 Dolby Laboratories Inc.\u00a0\u00a0<\/span><\/h2>\n<p><img loading=\"lazy\" class=\"wp-image-891 alignleft\" style=\"font-size: 20.16px;\" src=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/ce6e84a6-ad23-414b-8b35-760e8dea79fe-800x291.png\" alt=\"\" width=\"165\" height=\"60\" srcset=\"https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/ce6e84a6-ad23-414b-8b35-760e8dea79fe-800x291.png 800w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/ce6e84a6-ad23-414b-8b35-760e8dea79fe-510x185.png 510w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/ce6e84a6-ad23-414b-8b35-760e8dea79fe-1400x509.png 1400w, https:\/\/soundbody-audio.com\/wp-content\/uploads\/2021\/03\/ce6e84a6-ad23-414b-8b35-760e8dea79fe-768x279.png 768w, 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