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.label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-BFlgT1toIGh9l6qO .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-BFlgT1toIGh9l6qO :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u534f\u8bae\u5305<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u89e3\u5c01\u88c5<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u97f3\u9891\u89e3\u7801<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>PCM \u6570\u636e<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u91cd\u91c7\u6837 \/ \u97f3\u91cf\u8c03\u8282<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>DAC \u8f93\u51fa<\/p>\n<p><\/span><\/p>\n<ul>\n<li>\u89e3\u5c01\u88c5&#xff1a;\u5265\u79bb\u81ea\u5b9a\u4e49\u534f\u8bae\u5934&#xff0c;\u53d6\u51fa\u97f3\u9891\u5e27\u3002<\/li>\n<li>\u97f3\u9891\u89e3\u7801&#xff1a;\u6309\u7f16\u7801\u683c\u5f0f\u8fd8\u539f\u4e3a\u7ebf\u6027 PCM&#xff0c;\u4f8b\u5982 MP3 \u89e3\u7801\u8f93\u51fa 44.1kHz\/16bit \u7acb\u4f53\u58f0\u3002<\/li>\n<li>\u91cd\u91c7\u6837\u4e0e\u6df7\u97f3&#xff1a;\u7edf\u4e00\u91c7\u6837\u7387&#xff0c;\u5904\u7406\u591a\u8def\u97f3\u9891\u6df7\u5408\u3001\u97f3\u91cf\u589e\u76ca\u3002<\/li>\n<li>DAC \u8f93\u51fa&#xff1a;\u8f6c\u6362\u4e3a\u6a21\u62df\u7535\u538b\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n<h4>5.2 \u7f16\u7801\u683c\u5f0f\u7684\u9009\u62e9<\/h4>\n<p>\u5728 4G \u7f51\u7edc\u4e0b&#xff0c;\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad\u7801\u7387\u4e0e\u97f3\u8d28\u7684\u5e73\u8861\u975e\u5e38\u5173\u952e&#xff1a;<\/p>\n<ul>\n<li>MP3&#xff1a;\u517c\u5bb9\u6027\u597d\u3001\u89e3\u7801\u8d44\u6e90\u9002\u4e2d&#xff0c;\u9002\u5408\u97f3\u4e50\u64ad\u653e\u7c7b\u573a\u666f\u3002<\/li>\n<li>AAC&#xff1a;\u540c\u7b49\u97f3\u8d28\u4e0b\u7801\u7387\u66f4\u4f4e&#xff0c;\u9002\u5408\u5e26\u5bbd\u654f\u611f\u573a\u666f\u3002<\/li>\n<li>ADPCM \/ G.711 \/ G.726&#xff1a;\u7801\u7387\u6781\u4f4e&#xff0c;\u9002\u5408\u8bed\u97f3\u558a\u8bdd\u3001\u5e94\u6025\u64ad\u62a5\u3002<\/li>\n<li>PCM \u88f8\u6d41&#xff1a;\u65e0\u538b\u7f29&#xff0c;\u97f3\u8d28\u6700\u597d\u4f46\u5e26\u5bbd\u5360\u7528\u5927&#xff0c;\u4e00\u822c\u4ec5\u7528\u4e8e\u5c40\u57df\u7f51\u3002<\/li>\n<\/ul>\n<p>\u5b9e\u9645\u4ea7\u54c1\u4e2d\u5e38\u89c1\u505a\u6cd5\u662f\u6309\u573a\u666f\u81ea\u9002\u5e94&#xff1a;\u97f3\u4e50\u4efb\u52a1\u7528 MP3\/AAC&#xff0c;\u558a\u8bdd\u4efb\u52a1\u7528\u4f4e\u7801\u7387\u8bed\u97f3\u7f16\u7801\u3002<\/p>\n<h4>5.3 \u7f13\u51b2\u4e0e\u6297\u6296\u52a8<\/h4>\n<p>4G \u7f51\u7edc\u5b58\u5728\u6296\u52a8\u548c\u4e22\u5305&#xff0c;\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad\u7ec8\u7aef\u5fc5\u987b\u8bbe\u8ba1\u5408\u7406\u7684\u7f13\u51b2\u7b56\u7565&#xff1a;<\/p>\n<ul>\n<li>\u6296\u52a8\u7f13\u51b2&#xff08;Jitter Buffer&#xff09;&#xff1a;\u9884\u5b58\u4e00\u5b9a\u65f6\u957f\u97f3\u9891&#xff08;\u5982 200~500ms&#xff09;&#xff0c;\u5e73\u6ed1\u7f51\u7edc\u6ce2\u52a8\u3002<\/li>\n<li>\u4e22\u5305\u8865\u507f&#xff1a;\u5bf9\u4e22\u5931\u5e27\u505a\u9759\u97f3\u586b\u5145\u6216\u524d\u5e27\u91cd\u590d&#xff0c;\u907f\u514d\u7206\u97f3\u3002<\/li>\n<li>\u65ad\u7ebf\u91cd\u8fde&#xff1a;\u957f\u8fde\u63a5\u65ad\u5f00\u540e\u81ea\u52a8\u91cd\u8fde\u5e76\u7eed\u64ad&#xff0c;\u4fdd\u8bc1\u5e7f\u64ad\u8fde\u7eed\u6027\u3002<\/li>\n<\/ul>\n<h3>6. \u901a\u4fe1\u534f\u8bae\u4e0e\u4e91\u7aef\u4ea4\u4e92<\/h3>\n<p>\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad\u7ec8\u7aef\u4e0e\u4e91\u7aef\u7684\u4ea4\u4e92\u901a\u5e38\u5305\u542b\u4e09\u7c7b\u6d88\u606f&#xff1a;<\/p>\n<li>\u5fc3\u8df3\u4e0e\u6ce8\u518c&#xff1a;\u7ec8\u7aef\u4e0a\u7ebf\u540e\u6ce8\u518c\u8bbe\u5907\u4fe1\u606f&#xff0c;\u5468\u671f\u6027\u53d1\u9001\u5fc3\u8df3\u7ef4\u6301\u5728\u7ebf\u72b6\u6001\u3002<\/li>\n<li>\u63a7\u5236\u6307\u4ee4&#xff1a;\u64ad\u653e\u3001\u505c\u6b62\u3001\u97f3\u91cf\u8c03\u8282\u3001\u5206\u533a\u5207\u6362\u3001\u5b9a\u65f6\u4efb\u52a1\u4e0b\u53d1\u3002<\/li>\n<li>\u97f3\u9891\u6570\u636e&#xff1a;\u5b9e\u65f6\u6d41\u6216\u6587\u4ef6\u5206\u7247\u4e0b\u53d1\u3002<\/li>\n<p>\u4e00\u4e2a\u7b80\u5316\u7684\u534f\u8bae\u4ea4\u4e92\u793a\u610f&#xff1a;<\/p>\n<p>\u534f\u8bae\u8bbe\u8ba1\u4e0a\u5efa\u8bae\u5173\u6ce8&#xff1a;\u9274\u6743\u5b89\u5168&#xff08;\u8bbe\u5907\u5bc6\u94a5\u3001Token&#xff09;\u3001\u6307\u4ee4\u5e42\u7b49&#xff08;\u907f\u514d\u91cd\u590d\u64ad\u653e&#xff09;\u3001\u72b6\u6001\u56de\u4f20&#xff08;\u4fbf\u4e8e\u4e91\u7aef\u76d1\u63a7&#xff09;\u3002<\/p>\n<h3>7. \u5173\u952e\u5de5\u7a0b\u95ee\u9898\u4e0e\u4f18\u5316<\/h3>\n<h4>7.1 \u7f51\u7edc\u7a33\u5b9a\u6027<\/h4>\n<ul>\n<li>\u4f18\u5148\u4f7f\u7528 TCP \u957f\u8fde\u63a5\u627f\u8f7d\u63a7\u5236\u6307\u4ee4&#xff0c;\u97f3\u9891\u6d41\u53ef\u6309\u9700\u9009\u62e9 UDP \u4ee5\u964d\u4f4e\u5ef6\u8fdf\u3002<\/li>\n<li>\u8bbe\u7f6e\u5408\u7406\u7684\u91cd\u8fde\u9000\u907f\u7b56\u7565&#xff0c;\u907f\u514d\u5927\u91cf\u7ec8\u7aef\u540c\u65f6\u91cd\u8fde\u51b2\u51fb\u4e91\u7aef\u3002<\/li>\n<li>\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad\u652f\u6301 APN \u4e13\u7f51\u63a5\u5165&#xff0c;\u63d0\u5347\u5b89\u5168\u6027\u4e0e\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h4>7.2 \u529f\u8017\u4e0e\u6563\u70ed<\/h4>\n<ul>\n<li>4G \u6a21\u7ec4\u4e0e\u529f\u653e\u662f\u4e3b\u8981\u70ed\u6e90&#xff0c;\u97f3\u67f1\u5185\u90e8\u9700\u9884\u7559\u6563\u70ed\u7a7a\u95f4\u3002<br \/>\n-\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad \u7a7a\u95f2\u65f6\u53ef\u964d\u4f4e\u5fc3\u8df3\u9891\u7387&#xff0c;\u8fdb\u5165\u4f4e\u529f\u8017\u5f85\u673a\u3002<\/li>\n<\/ul>\n<h4>7.3 \u97f3\u8d28\u4e0e\u54cd\u5ea6<\/h4>\n<ul>\n<li>\u97f3\u67f1\u591a\u5355\u5143\u6392\u5217\u9700\u505a\u76f8\u4f4d\u4e0e\u6307\u5411\u6027\u8bbe\u8ba1&#xff0c;\u907f\u514d\u58f0\u5e72\u6d89\u3002<\/li>\n<li>\u52a0\u5165\u9650\u5e45\u5668&#xff08;Limiter&#xff09;\u9632\u6b62\u524a\u6ce2\u5931\u771f&#xff0c;\u4fdd\u62a4\u626c\u58f0\u5668\u3002<\/li>\n<\/ul>\n<h3>8. \u5178\u578b\u5e94\u7528\u573a\u666f<\/h3>\n<ul>\n<li>\u5e94\u6025\u5e7f\u64ad&#xff1a;\u5730\u9707\u3001\u9632\u6c5b\u3001\u6c14\u8c61\u9884\u8b66\u7684\u5feb\u901f\u64ad\u62a5&#xff0c;\u652f\u6301\u5206\u533a\u7cbe\u51c6\u4e0b\u53d1\u3002<\/li>\n<li>\u6821\u56ed\u5e7f\u64ad&#xff1a;\u4e0a\u4e0b\u8bfe\u94c3\u58f0\u3001\u901a\u77e5\u64ad\u62a5\u3001\u82f1\u8bed\u542c\u529b\u64ad\u653e\u3002<\/li>\n<li>\u666f\u533a\u4e0e\u516c\u56ed&#xff1a;\u80cc\u666f\u97f3\u4e50\u3001\u5b89\u5168\u63d0\u793a\u3001\u5bfc\u89c8\u8bb2\u89e3\u3002<\/li>\n<li>\u4e61\u6751\u5927\u5587\u53ed&#xff1a;\u653f\u7b56\u5ba3\u4f20\u3001\u519c\u6280\u64ad\u62a5&#xff0c;\u89e3\u51b3\u504f\u8fdc\u5730\u533a\u5e03\u7ebf\u96be\u9898\u3002<\/li>\n<\/ul>\n<h3>9. \u603b\u7ed3<\/h3>\n<p>\u90d1\u5dde\u91d1\u8c6b\u534e.\u96bd\u58f04G\u4e91\u5e7f\u64ad\u6709\u6e90\u97f3\u67f1\u7684\u6838\u5fc3\u4ef7\u503c\u5728\u4e8e\u628a\u7f51\u7edc\u63a5\u5165\u3001\u97f3\u9891\u89e3\u7801\u3001\u529f\u7387\u653e\u5927\u4e0e\u626c\u58f0\u5668\u96c6\u6210\u4e8e\u4e00\u4f53&#xff0c;\u7528\u516c\u7f51\u66ff\u4ee3\u4f20\u7edf\u97f3\u9891\u7ebf\u7f06&#xff0c;\u5b9e\u73b0\u4f4e\u6210\u672c\u3001\u5e7f\u8986\u76d6\u3001\u53ef\u8fdc\u7a0b\u8c03\u5ea6\u7684\u5e7f\u64ad\u80fd\u529b\u3002<\/p>\n<p>\u4ece\u6280\u672f\u4e0a\u770b&#xff0c;\u5b83\u5e76\u4e0d\u795e\u79d8&#xff1a;\u4f20\u8f93\u4fa7\u4f9d\u8d56 4G 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