\u6570\u5b57\u4fe1\u53f7\u5e7f\u64ad\uff08 Digital Audio Broadcasting \u7b80\u79f0DAB\uff09\u662f\u7ee7AM\u3001FM\u4f20\u7edf\u6a21\u62df\u5e7f\u64ad\u4e4b\u540e\u7684\u7b2c\u4e09\u4ee3\u5e7f\u64ad\u2014\u6570\u5b57\u4fe1\u53f7\u5e7f\u64ad\uff0c\u5b83\u63d0\u4f9b\u4e86\u63a5\u8fd1CD\u8d28\u91cf\u7684\u58f0\u97f3\uff0c\u5e7f\u64ad\u53ca\u5546\u673a\u65e0\u9650\u7684\u9644\u52a0\u6570\u636e\u670d\u52a1\uff0c\u5177\u6709\u6297\u566a\u58f0\u3001\u6297\u5e72\u6270\u3001\u6297\u7535\u6ce2\u4f20\u64ad\u8870\u843d\u3001\u9002\u5408\u9ad8\u901f\u79fb\u52a8\u63a5\u6536\u7b49\u4f18\u70b9\uff0c\u4fdd\u8bc1\u56fa\u5b9a\u3001\u643a\u5e26\u53ca\u79fb\u52a8\u65f6\u63a5\u6536\u4fe1\u53f7\u7684\u8d28\u91cf\u3002<\/p>\n\n\n\n
\u57fa\u672c\u4ecb\u7ecd\uff1a<\/p>\n\n\n\n
DAB\u662f\u7ee7AM\u3001FM\u4f20\u7edf\u6a21\u62df\u5e7f\u64ad\u4e4b\u540e\u7684\u7b2c\u4e09\u4ee3\u5e7f\u64ad\u2014\u6570\u5b57\u4fe1\u53f7\u5e7f\u64ad\uff0c\u5b83\u7684\u51fa\u73b0\u662f\u5e7f\u64ad\u6280\u672f\u7684\u4e00\u573a\u9769\u547d\u3002\u6570\u5b57\u97f3\u9891\u5e7f\u64ad\u4e0d\u4ec5\u4f20\u9012\u97f3\u9891\uff0c\u4e5f\u53ef\u4f20\u9012\u76f8\u5173\u4fe1\u606f(\u8def\u51b5\u3001\u6c14\u8c61\u3001\u65b0\u95fb\u7b49)\uff0c\u751a\u81f3\u4e5f\u53ef\u4f20\u9012\u56fe\u50cf\u3002\u9664\u4e86\u6297\u6742\u4fe1\u3001\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u4e4b\u5916\uff0c\u4f20\u9012\u7684\u4fe1\u53f7\u8870\u51cf\u6027\u4e5f\u4f4e\uff0c\u4f7f\u6570\u5b57\u5e7f\u64ad\u7535\u53f0\u7684\u53d1\u9001\u4f20\u9012\u8ddd\u79bb\u53ef\u66f4\u8fdc\u3001\u8986\u76d6\u7387\u66f4\u5e7f\u3002 \u5b83\u63d0\u4f9bCD\u7ea7\u7684\u7acb\u4f53\u58f0\u97f3\u8d28\u91cf\u53ef\u8fbe\u5230\u201c\u6c34\u6676\u822c\u900f\u660e\u201d\u7684\u53d1\u70e7\u7ea7\u97f3\u8d28\uff0c\u7279\u522b\u9002\u5408\u64ad\u51fa\u201c\u53e4\u5178\u97f3\u4e50\u201d\u3001\u201c\u4ea4\u54cd\u97f3\u4e50\u201d\u3001\u201c\u6d41\u884c\u97f3\u4e50\u201d\u7b49\uff0c\u6781\u5176\u53d7\u4e13\u4e1a\u97f3\u4e50\u4eba\u3001\u97f3\u4e50\u53d1\u70e7\u53cb\u548c\u97f3\u54cd\u53d1\u70e7\u53cb\u7684\u8ffd\u6367\uff01<\/p>\n\n\n\n
\u53d1\u5c55\u7b80\u53f2\uff1a<\/p>\n\n\n\n
DAB\u6280\u672f\u7684\u53d1\u5c55\u6e90\u8d77\u4e8e1980\u5e74\u5fb7\u56fd\u5e7f\u64ad\u6280\u672f\u7814\u7a76\u6240\uff0c\u4ee5Eureka-147\u7cfb\u7edf\u9488\u5bf9\u5730\u9762\u97f3\u8baf\u5e7f\u64ad\u6280\u672f\u8fdb\u884c\u7814\u7a76\u30021985\u5e74\uff0c\u5fb7\u56fd\u5e76\u5f00\u59cb\u4e8e\u6155\u5c3c\u9ed1\u8fdb\u884cDAB\u8bd5\u64ad\u5b9e\u9a8c\u30021986\u5e74\uff0c\u5fb7\u3001\u82f1\u3001\u6cd5\u3001\u8377\u3001\u4e39\u9ea6\u7b49\u56fd\u7684\u653f\u5e9c\u53ca\u5e7f\u64ad\u673a\u6784\u4e0e\u7535\u5b50\u4ea7\u4e1a\u754c\u5171\u7ec4Eureka\u8054\u76df\uff0c\u5e76\u5236\u5b9aEureka-147 DAB\u89c4\u683c\u3002DRM\u7cfb\u7edf\u5219\u7531\u6cd5\u56fd\u4e8e1996\u5e74\u63d0\u51fa\uff0c\u4e8e1998\u5e74\u4e8e\u4e2d\u56fd\u5927\u9646\u5e7f\u5dde\u6210\u7acbDRM\u8054\u76df\uff0c 2003\u5e747\u6708\u6b63\u5f0f\u63a8\u51fa\uff0c\u5f53\u524d\u7ea6\u670930\u4e2a\u4f1a\u5458\u56fd\uff0c\u5168\u7403\u5df2\u7ea6\u670927\u4e2aDRM\u7cfb\u7edf\u6b63\u5f0f\u8fd0\u4f5c\uff0c\u4e2d\u56fd\u5927\u9646\u867d\u4e3aDRM\u8054\u76df\u6210\u5458\u4e4b\u4e00\uff0c\u4f46\u5f53\u524d\u4ecd\u4ee5Eureka-147\u4e3a\u4e3b\u8981DAB\u5b9e\u9a8c\u89c4\u683c\u3002IBOC\u7cfb\u7edf\u4e3a\u7f8e\u56fd\u57fa\u4e8eEureka-147\u89c4\u5212\u7684\u9891\u7387\u53e6\u6709\u5b83\u7528\uff0c\u4f46\u5e0c\u671b\u638c\u63e1\u6570\u5b57\u5e7f\u64ad\u53d1\u5c55\u6280\u672f\u800c\u63d0\u51fa\uff0c\u5e76\u5229\u7528\u73b0\u6709AM\u53caFM\u9891\u6bb5\u4f5c\u4e3aIBOC\u4e4b\u7814\u53d1\u5de5\u4f5c\uff0c\u56e0\u97f3\u8d28\u72b6\u51b5\u81f3\u4eca\u4ecd\u672a\u6539\u5584\uff0c\u5f53\u524d\u6539\u7528IBOC HDC\u7f16\u8bd1\u7801\u6280\u672f\u8fdb\u884c\u7814\u53d1\u6d4b\u8bd5\u5de5\u4f5c\u3002<\/p>\n\n\n\n
\u6536\u542c\u6280\u672f\uff1a<\/p>\n\n\n\n
\u6309\u7167\u5f53\u524d\u6d41\u884c\u7684\u8bf4\u6cd5\uff0cDAB\u662f\u97f3\u9891\u4f20\u8f93\u4ece\u6a21\u62df\u65f6\u4ee3\u5411\u6570\u5b57\u65f6\u4ee3\u8fc1\u79fb\u800c\u51fa\u73b0\u7684\u4ea7\u7269\uff0c\u5b83\u4e5f\u662f\u7ee7AM\u548cFM\u4e4b\u540e\u95ee\u4e16\u7684\u7b2c\u4e09\u4ee3\u5e7f\u64ad\u7cfb\u7edf\u3002\u4f46\u662f\u66f4\u52a0\u4ee4\u4eba\u611f\u5174\u8da3\u7684\u662f\uff0c\u4f9d\u9760DAB\uff0c\u7406\u8bba\u4e0a\u4f60\u53ef\u4ee5\u4f7f\u7528\u773c\u775b\u6765\u201c\u6536\u542c\u201d\u5e7f\u64ad\u2014\u2014\u7531\u4e8e\u6570\u5b57\u7279\u6027\uff0cDAB\u53ef\u4ee5\u4f20\u8f93\u4efb\u4f55\u6587\u672c\u751a\u81f3\u662f\u56fe\u50cf\u4fe1\u53f7\u3002\u56e0\u6b64\u4f60\u53ef\u4ee5\u5c06DAB\u6536\u97f3\u673a\u4e0e\u7535\u89c6\u673a\u8fdb\u884c\u8fde\u63a5\uff0c\u4ee5\u4fbf\u8fd8\u539f\u6570\u5b57\u4fe1\u53f7\u4e2d\u7684\u89c6\u9891\u56fe\u50cf\u3002\u4ece\u8fd9\u4e2a\u610f\u4e49\u4e0a\u6765\u8bf4\uff0cDAB\u5df2\u7ecf\u4e0d\u662f\u4e00\u79cd\u53ea\u4f20\u8f93\u97f3\u9891\u4fe1\u53f7\u7684\u7eaf\u7cb9\u5e7f\u64ad\u7cfb\u7edf\u4e86\u3002<\/p>\n\n\n\n
\u5373\u4f7f\u5728\u6536\u97f3\u8d28\u91cf\u4e0a\uff0c\u4e0e\u6a21\u62df\u6536\u97f3\u76f8\u6bd4\uff0cDAB\u5e7f\u64ad\u4e5f\u5177\u6709\u6781\u5927\u7684\u4f18\u52bf\u3002DAB\u5e7f\u64ad\u7684\u4fe1\u566a\u6bd4\u8d77\u7801\u572895db\u4ee5\u4e0a\uff0c\u7f16\u7801\u7387\u5219\u8fbe\u5230\u4e86192Kbps\u4ee5\u4e0a\uff0c\u8fd9\u5df2\u7ecf\u8d85\u8fc7\u4e86\u5927\u591a\u6570MP3\u7684\u97f3\u8d28\u6c34\u51c6\u3002\u540c\u65f6\u7531\u4e8e\u5177\u5907\u6570\u5b57\u4fe1\u53f7\u4f20\u8f93\u6297\u5e72\u6270\u548c\u6297\u7535\u6ce2\u8870\u51cf\u7684\u7279\u6027\uff0cDAB\u5e7f\u64ad\u5341\u5206\u9002\u7528\u4e8e\u5728\u6fc0\u70c8\u7684\u79fb\u52a8\u73af\u5883\u4e2d\u4f7f\u7528\uff0c\u4f8b\u5982\u8f66\u8f7d\u3002<\/p>\n\n\n\n
\u800c\u5728\u4f7f\u7528\u4f53\u9a8c\u4e0a\uff0cDAB\u6536\u97f3\u673a\u4e0e\u4f20\u7edf\u7684AM\/FM\u4e5f\u622a\u7136\u4e0d\u540c\u3002DAB\u5e7f\u64ad\u53ea\u9700\u8981\u7528\u6237\u8bb0\u4f4f\u76f8\u5f53\u6709\u9650\u7684\u51e0\u4e2a\u9891\u6bb5\u5373\u53ef\u2014\u2014\u6bcf\u4e2a\u9891\u6bb5\u5c5e\u4e8e\u4e00\u4e2a\u7279\u5b9a\u7684\u7efc\u5408\u6027\u7535\u53f0\uff0c\u800c\u6bcf\u4e2a\u7535\u53f0\u53c8\u53ef\u4ee5\u5728\u8fd9\u4e2a\u9891\u6bb5\u5185\u8bbe\u7f6e5-6\u4e2a\u9891\u9053\u3002\u5bf9\u4e8e\u4e00\u4e2a\u53e4\u5178\u97f3\u4e50\u7231\u597d\u8005\u6765\u8bf4\uff0c\u6536\u542cDAB\u5e7f\u64ad\u5178\u578b\u7684\u6b65\u9aa4\u662f\uff1a\u8c03\u5230\u7535\u53f0(\u4f8b\u5982BBC)\u6240\u5728\u7684\u201c\u64ad\u51fa\u9891\u7387\u201d\uff0c\u7136\u540e\u8fdb\u5165\u5176\u4e0b\u7684\u97f3\u4e50\u5b50\u9891\u9053\uff0c\u6700\u540e\u518d\u8fdb\u5165\u53e4\u5178\u97f3\u4e50\u9891\u9053\uff0c\u5c31\u50cf\u6253\u5f00\u83dc\u5355\u4e00\u6837\u3002<\/p>\n\n\n\n
\u4e8b\u5b9e\u4e0a\uff0cDAB\u5df2\u7ecf\u6210\u4e86\u82f1\u56fd\u7b49\u897f\u6b27\u56fd\u5bb6\u7684\u6570\u5b57\u97f3\u9891\u5e7f\u64ad\u6807\u51c6\u3002\u5728\u5f53\u524d\uff0c\u5f71\u54cd\u6700\u5927\u7684\u4e00\u79cdDAB\u6807\u51c6\u662f\u4fd7\u79f0\u201c\u6b27\u89c4\u201d\u7684Eureka-147\uff0c\u4f46\u5b83\u7684\u4f7f\u7528\u5730\u533a\u5e76\u4e0d\u4ec5\u4ec5\u9650\u4e8e\u6b27\u6d32\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u7f8e\u56fd\u5236\u5b9a\u7684IBOC(In-Band On-Channel)\u53ca\u6cd5\u56fd\u5236\u5b9a\u7684DRM(Digital Radio Mondiale)\u4e5f\u662f\u4e16\u754c\u4e0a\u91cd\u8981\u7684\u4e24\u4e2aDAB\u6280\u672f\u6807\u51c6\u3002\u800c\u4f5c\u4e3a2011\u5e747\u6708\u4efd\u521a\u521a\u6210\u7acb\u7684DRM\u6807\u51c6\u7684\u7b7e\u7f72\u5730\uff0c\u4e2d\u56fd\u6210\u4e3a\u4e86\u8be5\u8054\u76df\u768430\u4e2a\u6210\u5458\u4e4b\u4e00\u3002\u901a\u8fc7\u4e0e\u6b27\u76df\u8fdb\u884c\u5408\u4f5c\uff0c\u4e2d\u56fd\u5df2\u7ecf\u5728\u5317\u4eac\u5efa\u7acb\u4e86DAB\u5b9e\u9a8c\u5ba4\uff0c\u5e76\u4e14\u65e9\u5c31\u5728\u5e7f\u4e1c\u5f00\u59cb\u5efa\u8bbeDAB\u5148\u5bfc\u7f51\u5e76\u8fdb\u884c\u4e86DAB\u5e7f\u64ad\u3002<\/p>\n\n\n\n
\u7279\u8272\uff1a<\/p>\n\n\n\n
DAB \u5728 COFDM \u6280\u672f\u7684\u57fa\u7840\u4e0a\uff0c\u91c7\u7528\u4e86\u65f6\u95f4\u4ea4\u7ec7\u548c\u5206\u7b49\u7ea7\u9632\u9519\u4fdd\u62a4\uff0c\u4f7f\u5f97 DAB \u79fb\u52a8\u7279\u6027\u8fbe\u5230\u8fd1\u4e4e\u5b8c\u7f8e\u7684\u5883\u5730\uff0cDAB\u7684\u9891\u8c31\u5e26\u5bbd\u4e3a 1.5MHz\uff1b\u6570\u636e\u5e26\u5bbd\u4e3a 1.2M\uff0c\u5177\u6709\u65f6\u5206\u529f\u80fd\uff0c\u5f53\u7528\u6237\u9009\u597d\u8282\u76ee\u540e\uff0cDAB \u89e3\u7801\u5668\u53ea\u8981\u5bf9\u9700\u8981\u7684 DAB \u7b26\u53f7\u89e3\u7801\uff0c\u56e0\u800c\u65f6\u5206\u4f5c\u7528\u5341\u5206\u6709\u6548\u3002\u6839\u636e\u6240\u9009\u8282\u76ee\u7684\u7801\u6d41 DAB \u89e3\u7801\u5668\u7684\u7528\u529f\u6bd4\u7387\u53ef\u964d\u5230\u5168\u529f\u7387\u768420%-50%\u3002DAB\u5728\u5168\u7403\u8d8b\u70ed\u539f\u56e0\u4e4b\u4e00\u662f\u4f17\u591a\u6570\u5b57\u79fb\u52a8\u6807\u51c6\u4e2d\uff0cDAB \u6700\u6210\u719f\uff0c\u4e14\u5df2\u6709\u73b0\u6210\u7684\u53f0\u7ad9\u548c\u7f51\u7edc\u8bbe\u65bd\u53ef\u7528\uff0c\u662f\u5b9e\u73b0\u624b\u6301\u5f0f\u79fb\u52a8\u6570\u5b57\u63a5\u6536\u5de5\u7a0b\u91cf\u5c0f\u3001\u6210\u672c\u4f4e\u3001\u6027\u80fd\u8f83\u597d\u7684\u6280\u672f\u3002<\/p>\n\n\n\n
\u5dee\u5f02\uff1a<\/p>\n\n\n\n
DAB\u4e0e\u4f20\u7edf\u5e7f\u64ad(FM\u3001AM)\u6700\u5927\u7684\u5dee\u5f02\uff0c\u9664\u4e86DAB\u5177\u6709CD\u97f3\u8d28\u7684\u4f20\u8f93\u8d28\u91cf\u53ca\u6280\u672f\u5916\uff0cDAB\u8fd8\u5177\u6709\u63a5\u6536\u591a\u5a92\u4f53\u4fe1\u606f\uff0c\u5305\u62ec\u6587\u5b57\u3001\u6570\u636e\u3001\u56fe\u7247\u3001\u5f71\u50cf\uff0c\u751a\u81f3\u5b9e\u65f6\u4fe1\u606f\u7684\u66f4\u65b0\u3002\u6545DAB\u7684\u5e94\u7528\u5e76\u4e0d\u4ec5\u5c40\u9650\u4e8e\u97f3\u8baf\u7684\u4f20\u8f93(Audio Broadcast)\u670d\u52a1\uff0c\u66f4\u91cd\u8981\u7684\u662f\u6570\u636e\u4fe1\u606f\u5f71\u97f3\u670d\u52a1(Data Broadcasting)\u670d\u52a1\uff0c\u56e0\u6b64\u8bb8\u591a\u5b66\u8005\u4e13\u5bb6\u5c06DAB\u79f0\u4e3aDigital Broadcasting\u3002<\/p>\n\n\n\n
\u53d1\u5c55\u73b0\u51b5\uff1a<\/p>\n\n\n\n
\u867d\u7136DAB\u6280\u672f\u7684\u95ee\u4e16\u79bb\u5982\u4eca\u5df2\u7ecf\u6709\u5c06\u8fd125\u5e74\u4e86\uff0c\u4f46\u5b83\u771f\u6b63\u8fdb\u5165\u6c11\u7528\u8fd8\u53ea\u662f\u5982\u4eca10\u5e74\u751a\u81f35\u5e74\u4e4b\u5185\u7684\u4e8b\u60c5\uff0cDAB\u6536\u97f3\u673a\u7684\u5927\u5e45\u964d\u4ef7\u6210\u4e3a\u4e862003-2004\u5e74DAB\u5e7f\u64ad\u5728\u67d0\u4e9b\u56fd\u5bb6\u8fc5\u901f\u666e\u53ca\u7684\u6700\u91cd\u8981\u56e0\u7d20\u3002<\/p>\n\n\n\n
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\u4ea7\u54c1\u5e94\u7528\uff1a<\/p>\n\n\n\n
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\u5bfc\u822a\u5e94\u7528\uff1a<\/p>\n\n\n\n
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\u624b\u673a\u7535\u89c6\u5e94\u7528\uff1a<\/p>\n\n\n\n
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Eureka\uff1a<\/p>\n\n\n\n
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