{"id":261,"date":"2025-07-08T14:15:07","date_gmt":"2025-07-08T06:15:07","guid":{"rendered":"http:\/\/www.fishq.top\/?p=261"},"modified":"2025-07-31T17:33:13","modified_gmt":"2025-07-31T09:33:13","slug":"aac","status":"publish","type":"post","link":"https:\/\/www.fishq.top\/index.php\/2025\/07\/08\/aac\/","title":{"rendered":"aac\u97f3\u9891\u5206\u6790"},"content":{"rendered":"\n<!-- \u8df3\u52a8\u5f69\u8272\u5c45\u4e2d\u65e5\u671f + \u5c0f\u732b -->\n<div style=\"text-align:center;font-size:28px;font-weight:bold;animation:j 1.2s ease-in-out infinite,c 3s linear infinite\">2025.7.08<span style=\"margin-left:6px\">\ud83d\udc31<\/span><\/div>\n<style>@keyframes j{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes c{0%{color:#f00}16.6%{color:#ff0}33.3%{color:#0f0}50%{color:#0ff}66.6%{color:#00f}83.3%{color:#f0f}100%{color:#f00}}<\/style>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/1.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/1.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-249\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u6982\u8ff0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">AAC\uff08Advanced Audio Coding\uff09\uff0c\u4e2d\u6587\u540d\uff1a\u9ad8\u7ea7\u97f3\u9891\u7f16\u7801\u3002\u51fa\u73b0\u4e8e1997\u5e74\uff0c\u57fa\u4e8eMPEG-2\u7684\u97f3\u9891\u7f16\u7801\u6280\u672f\u3002\u7531Fraunhofer IIS\u3001\u675c\u6bd4\u5b9e\u9a8c\u5ba4\u3001AT&amp;T\u3001\u7d22\u5c3c\u7b49\u516c\u53f8\u5171\u540c\u5f00\u53d1\uff0c\u76ee\u7684\u662f\u53d6\u4ee3MP3\u683c\u5f0f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2000\u5e74\uff0cMPEG-4\u6807\u51c6\u51fa\u73b0\u540e\uff0cAAC\u91cd\u65b0\u96c6\u6210\u4e86\u5176\u7279\u6027\uff0c\u52a0\u5165\u4e86SBR\u6280\u672f\u548cPS\u6280\u672f\uff0c\u4e3a\u4e86\u533a\u522b\u4e8e\u4f20\u7edf\u7684MPEG-2 AAC\u53c8\u79f0\u4e3aMPEG-4 AAC\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u4eceaac\u7f16\u7801\u7684\u57fa\u7840\u6982\u5ff5\u51fa\u53d1\u5c55\u5f00\uff0c\u540e\u9762\u5305\u542baac\u7f16\u7801\u89c4\u683c\u3001AAC\u683c\u5f0f\u7684\u6587\u4ef6\u600e\u4e48\u7ec4\u6210\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/2.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/2.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-250\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001aac\u7f16\u7801\u89c4\u683c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">aac\u67099\u79cd\u89c4\u683c(Profile)\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u573a\u666f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>MPEG-2 AAC LC\uff1a\u4f4e\u590d\u6742\u5ea6\u89c4\u683c\uff08Low Complexity\uff09 \u6ce8\uff1a\u6bd4\u8f83\u7b80\u5355\uff0c\u6ca1\u6709\u589e\u76ca\u63a7\u5236\uff0c\u4f46\u63d0\u9ad8\u4e86\u7f16\u7801\u6548\u7387\uff0c\u5728\u4e2d\u7b49\u7801\u7387\u7684\u7f16\u7801\u6548\u7387\u4ee5\u53ca\u97f3\u8d28\u65b9\u9762\uff0c\u90fd\u80fd\u627e\u5230\u5e73\u8861\u70b9\u3002\nMPEG-2 AAC Main\uff1a\u4e3b\u89c4\u683c\nMPEG-2 AAC SSR\uff1a\u53ef\u53d8\u91c7\u6837\u7387\u89c4\u683c\uff08Scaleable Sample Rate\uff09\nMPEG-4 AAC LC\uff1a\u4f4e\u590d\u6742\u5ea6\u89c4\u683c\uff08Low Complexity\uff09\u2014\u73b0\u5728\u7684\u624b\u673a\u6bd4\u8f83\u5e38\u89c1\u7684MP4\u6587\u4ef6\u4e2d\u7684\u97f3\u9891\u90e8\u4efd\u5c31\u5305\u62ec\u4e86\u8be5\u89c4\u683c\u97f3\u9891\u6587\u4ef6\nMPEG-4 AAC Main\uff1a\u4e3b\u89c4\u683c \u6ce8\uff1a\u5305\u542b\u4e86\u9664\u589e\u76ca\u63a7\u5236\u4e4b\u5916\u7684\u5168\u90e8\u529f\u80fd\uff0c\u5176\u97f3\u8d28\u6700\u597d\nMPEG-4 AAC SSR\uff1a\u53ef\u53d8\u91c7\u6837\u7387\u89c4\u683c\uff08Scaleable Sample Rate\uff09\nMPEG-4 AAC LTP\uff1a\u957f\u65f6\u671f\u9884\u6d4b\u89c4\u683c\uff08Long Term Predicition\uff09\nMPEG-4 AAC LD\uff1a\u4f4e\u5ef6\u8fdf\u89c4\u683c\uff08Low Delay\uff09\nMPEG-4 AAC HE\uff1a\u9ad8\u6548\u7387\u89c4\u683c\uff08High Efficiency\uff09\u2014\u8fd9\u79cd\u89c4\u683c\u9002\u5408\u7528\u4e8e\u4f4e\u7801\u7387\u7f16\u7801\uff0c\u6709Nero ACC \u7f16\u7801\u5668\u652f\u6301<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u65e9\u662f\u57fa\u4e8eMPEG-2\u6807\u51c6\uff0c\u79f0\u4e3a\uff1aMPEG-2 AAC\u3002\u540e\u6765MPEG-4\u6807\u51c6\u5728\u539f\u6765\u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u4e00\u4e9b\u65b0\u6280\u672f\uff0c\u79f0\u4e3a\uff1aMPEG-4 AAC\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d41\u884c\u7684Nero AAC\u7f16\u7801\u7a0b\u5e8f\u53ea\u652f\u6301LC\uff0cHE\uff0cHEv2\u8fd9\u4e09\u79cd\u89c4\u683c\uff0c\u7f16\u7801\u540e\u7684AAC\u97f3\u9891\uff0c\u89c4\u683c\u663e\u793a\u90fd\u662fLC\u3002HE\u5176\u5b9e\u5c31\u662fAAC\uff08LC\uff09+ SBR\u6280\u672f\uff0cHEv2\u5c31\u662fAAC\uff08LC\uff09+ SBR + PS\u6280\u672f\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HE\uff1aHE-AAC v1\uff08\u53c8\u79f0AACPlusV1\uff0cSBR)\uff0c\u7528\u5bb9\u5668\u7684\u65b9\u6cd5\u5b9e\u73b0\u4e86AAC\uff08LC\uff09+SBR\u6280\u672f\u3002SBR\u5176\u5b9e\u4ee3\u8868\u7684\u662fSpectral Band Replication(\u9891\u6bb5\u590d\u5236)\u3002\u7b80\u8981\u53d9\u8ff0\u4e00\u4e0b\uff0c\u97f3\u4e50\u7684\u4e3b\u8981\u9891\u8c31\u96c6\u4e2d\u5728\u4f4e\u9891\u6bb5\uff0c\u9ad8\u9891\u6bb5\u5e45\u5ea6\u5f88\u5c0f\uff0c\u4f46\u5f88\u91cd\u8981\uff0c\u51b3\u5b9a\u4e86\u97f3\u8d28\u3002\u5982\u679c\u5bf9\u6574\u4e2a\u9891\u6bb5\u7f16\u7801\uff0c\u82e5\u662f\u4e3a\u4e86\u4fdd\u62a4\u9ad8\u9891\u5c31\u4f1a\u9020\u6210\u4f4e\u9891\u6bb5\u7f16\u7801\u8fc7\u7ec6\u4ee5\u81f4\u6587\u4ef6\u5de8\u5927\uff1b\u82e5\u662f\u4fdd\u5b58\u4e86\u4f4e\u9891\u7684\u4e3b\u8981\u6210\u5206\u800c\u5931\u53bb\u9ad8\u9891\u6210\u5206\u5c31\u4f1a\u4e27\u5931\u97f3\u8d28\u3002SBR\u628a\u9891\u8c31\u5207\u5272\u5f00\u6765\uff0c\u4f4e\u9891\u5355\u72ec\u7f16\u7801\u4fdd\u5b58\u4e3b\u8981\u6210\u5206\uff0c\u9ad8\u9891\u5355\u72ec\u653e\u5927\u7f16\u7801\u4fdd\u5b58\u97f3\u8d28\uff0c\u201c\u7edf\u7b79\u517c\u987e\u201d\u4e86\uff0c\u5728\u51cf\u5c11\u6587\u4ef6\u5927\u5c0f\u7684\u60c5\u51b5\u4e0b\u8fd8\u4fdd\u5b58\u4e86\u97f3\u8d28\uff0c\u5b8c\u7f8e\u7684\u5316\u89e3\u8fd9\u4e00\u77db\u76fe\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HEv2\uff1a\u7528\u5bb9\u5668\u7684\u65b9\u6cd5\u5305\u542b\u4e86HE-AAC v1\u548cPS\u6280\u672f\u3002PS\u6307\u201cparametric stereo\u201d\uff08\u53c2\u6570\u7acb\u4f53\u58f0\uff09\u3002\u539f\u6765\u7684\u7acb\u4f53\u58f0\u6587\u4ef6\u6587\u4ef6\u5927\u5c0f\u662f\u4e00\u4e2a\u58f0\u9053\u7684\u4e24\u500d\u3002\u4f46\u662f\u4e24\u4e2a\u58f0\u9053\u7684\u58f0\u97f3\u5b58\u5728\u67d0\u79cd\u76f8\u4f3c\u6027\uff0c\u6839\u636e\u9999\u519c\u4fe1\u606f\u71b5\u7f16\u7801\u5b9a\u7406\uff0c\u76f8\u5173\u6027\u5e94\u8be5\u88ab\u53bb\u6389\u624d\u80fd\u51cf\u5c0f\u6587\u4ef6\u5927\u5c0f\u3002\u6240\u4ee5PS\u6280\u672f\u5b58\u50a8\u4e86\u4e00\u4e2a\u58f0\u9053\u7684\u5168\u90e8\u4fe1\u606f\uff0c\u7136\u540e\uff0c\u82b1\u5f88\u5c11\u7684\u5b57\u8282\u7528\u53c2\u6570\u63cf\u8ff0\u53e6\u4e00\u4e2a\u58f0\u9053\u548c\u5b83\u4e0d\u540c\u7684\u5730\u65b9\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/3.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/3.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-251\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001aac\u5c01\u88c5\u683c\u5f0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">AAC\u6709\u4e24\u79cd\u5c01\u88c5\u683c\u5f0f\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">ADIF<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">ADTS<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ADIF\uff1a\u5168\u79f0 Audio Data Interchange Format\uff0c\u97f3\u9891\u6570\u636e\u4ea4\u6362\u683c\u5f0f\uff0c\u8be5\u683c\u5f0f\u4e00\u822c\u5e94\u7528\u5728\u5c06\u97f3\u9891\u901a\u8fc7\u5199\u6587\u4ef6\u65b9\u5f0f\u5b58\u50a8\u5728\u78c1\u76d8\u91cc\u7684\u573a\u666f\uff0c\u4e0d\u80fd\u8fdb\u884c\u968f\u673a\u8bbf\u95ee\uff0c\u4e0d\u5141\u8bb8\u5728\u6587\u4ef6\u4e2d\u95f4\u5f00\u59cb\u8fdb\u884c\u89e3\u7801\uff1b\u53ea\u6709\u62ff\u5230\u6574\u4e2a\u6587\u4ef6\u65f6\u624d\u80fd\u5f00\u59cb\u8fdb\u884c\u6e32\u67d3\u64ad\u653e\uff1b<\/li>\n\n\n\n<li>ADTS\uff1a\u5168\u79f0 Audio Data Transport Stream\uff0c\u97f3\u9891\u6570\u636e\u4f20\u8f93\u6d41\uff0c\u8be5\u683c\u5f0f\u7684\u7279\u5f81\u662f\u7528\u540c\u6b65\u5b57\u8282\u8fdb\u884c\u5c06 AAC \u97f3\u9891\u622a\u65ad\uff0c\u7136\u540e\u53ef\u4ee5\u5141\u8bb8\u5ba2\u6237\u7aef\u5728\u4efb\u4f55\u5730\u65b9\u8fdb\u884c\u89e3\u7801\u64ad\u653e\uff0c\u9002\u5408\u7f51\u7edc\u4f20\u8f93\u573a\u666f\uff1b\u7b80\u5355\u6765\u8bf4\uff0cADTS\u53ef\u4ee5\u5728\u4efb\u610f\u5e27\u8fdb\u884c\u89e3\u7801\uff0c\u6bcf\u4e00\u4e2a\u5e27\u90fd\u6709\u5934\u4fe1\u606f\uff0c\u4f46ADIF\u5374\u53ea\u6709\u4e00\u4e2a\u7edf\u4e00\u7684\u5934\uff0c\u6240\u4ee5\u5fc5\u987b\u5f97\u5230\u6240\u6709\u7684\u6570\u636e\u540e\u624d\u80fd\u89e3\u7801\u3002\u4e00\u4e2a\u5e27\u5c31\u80fd\u5355\u72ec\u89e3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e24\u79cdHeader\u7684\u5f62\u5f0f\u4e5f\u4e0d\u540c\uff0c\u76ee\u524d\u4e00\u822c\u7f16\u7801\u540e\u548c\u62bd\u53d6\u51fa\u7684\u57fa\u672c\u90fd\u662fADTS\u683c\u5f0f\u97f3\u9891\u6d41\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u27283.1 ADIF \u683c\u5f0f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u683c\u5f0f\u6bd4\u8f83\u5c11\u89c1\uff0c\u7b80\u5355\u8ba4\u8bc6\u4e00\u4e0b\u5373\u53ef\uff0c\u4e0b\u56fe\u662fADIF\u683c\u5f0f\u7684\u5e8f\u5217\uff0c\u7531<strong><em>adif_header\u3001byte_alignment<\/em><\/strong>\u3001<strong><em>raw_data_stream<\/em><\/strong>\u4e09\u90e8\u5206\u7ec4\u6210\u3002byte_alignment\u662f\u7528\u6765\u505a\u5b57\u8282\u5bf9\u9f50\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cADIF\u683c\u5f0f\u7531\u4e00\u4e2a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">ADIF\u5934\u4fe1\u606f(adif_header)<\/mark><\/strong> \u548c <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u539f\u59cb\u6570\u636e\u6d41(raw_data_stream) <\/mark><\/strong>\u6784\u6210\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"973\" height=\"250\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-290\"  sizes=\"auto, (max-width: 973px) 100vw, 973px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u770b\u770bADIF\u5934\u4fe1\u606f\u5305\u62ec\u54ea\u4e9b\u5185\u5bb9\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-6.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"976\" height=\"592\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-6.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-292\"  sizes=\"auto, (max-width: 976px) 100vw, 976px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u27283.2&nbsp;ADTS \u683c\u5f0f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ADTS \u683c\u5f0f\u7684AAC\u97f3\u9891\u6d41\u662f\u7531\u4e00\u4e2a\u4e2a\u7684ADTS\u5e27\u7ec4\u6210\u7684\uff0c\u4e0b\u56fe\u662fADTS\u5e8f\u5217\u7684\u8bed\u6cd5\uff0c\u6574\u4e2a\u5e8f\u5217\u7531\u82e5\u5e72\u4e2a<code>adts_frame<\/code>\u7ec4\u6210\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"972\" height=\"249\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-316\"  sizes=\"auto, (max-width: 972px) 100vw, 972px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-8.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"748\" height=\"82\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-8.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-318\"  sizes=\"auto, (max-width: 748px) 100vw, 748px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u6bcf\u4e2aADTS\u5e27\u90fd\u662f\u7531<code><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">ADTS\u5934\u90e8<\/mark><\/strong><\/code>\u548c<code><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">AAC\u97f3\u9891\u6570\u636e<\/mark><\/strong><\/code>\u7ec4\u6210\uff0c\u4e0b\u56fe\u662fadts_frame\u7684\u8bed\u6cd5\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><code>adts_fixed_header<\/code>(\u56fa\u5b9a\u5934\u90e8\u4fe1\u606f)<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><code>adts_variable_header<\/code>(\u53ef\u53d8\u5934\u90e8\u4fe1\u606f)<\/mark><\/strong>\u90fd\u5c5e\u4e8eADTS\u5934\u90e8\u6570\u636e\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><code>raw_data_block<\/code>\u8868\u793aAAC\u97f3\u9891\u539f\u59cb\u6570\u636e\u5757<\/mark><\/strong>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-9.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1011\" height=\"502\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-9.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-321\"  sizes=\"auto, (max-width: 1011px) 100vw, 1011px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u56fe\u662f\u7f51\u7edc\u4e0a\u5bf9AAC\u97f3\u9891\u6d41\u603b\u7ed3\u7684\u4e00\u5f20\u56fe\u7247\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b8f\u89c2\u5730\u8ba4\u8bc6AAC\u97f3\u9891\u6d41\u7684ADTS\u683c\u5f0f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-10-1024x416.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"416\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-10-1024x416.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-324\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u27283.2.1&nbsp;ADTS\u5934\u90e8<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">ADTS\u5934\u90e8\u6709\u4e24\u90e8\u5206\uff0c\u5206\u4e3a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u56fa\u5b9a\u5934\u90e8(<code>adts_fixed_header<\/code>)<\/mark><\/strong>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u53ef\u53d8\u5934(<code>adts_variable_header<\/code>)<\/mark><\/strong>\uff1a<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u27283.2.1.1&nbsp;<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u56fa\u5b9a\u5934\u90e8(<code>adts_fixed_header<\/code>)<\/mark><\/strong><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">ADTS\u56fa\u5b9a\u5934\u90e8\u662f \u89e3\u7801\u5668\u8bc6\u522b\u97f3\u9891\u683c\u5f0f\u548c\u53c2\u6570\u7684\u5173\u952e\u90e8\u5206\uff0c\u5b83\u544a\u8bc9\u89e3\u7801\u5668\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u662f\u4e00\u4e2a\u5408\u6cd5\u7684ADTS\u5e27\uff08\u901a\u8fc7syncword\uff09<\/li>\n\n\n\n<li>\u97f3\u9891\u662fMPEG-4\u8fd8\u662fMPEG-2<\/li>\n\n\n\n<li>\u4f7f\u7528\u54ea\u79cdAAC Profile<\/li>\n\n\n\n<li>\u91c7\u6837\u7387\u548c\u58f0\u9053\u6570\u662f\u591a\u5c11<\/li>\n\n\n\n<li>\u662f\u5426\u6709CRC\u6821\u9a8c\u7b49\u9644\u52a0\u4fe1\u606f<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-11.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"469\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-11.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-335\"  sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u6bb5\u89e3\u6790\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>syncword<\/em><\/strong>\uff1a\u5360\u752812bit\uff1b<br>\u6240\u6709\u7684bit\u4f4d\u90fd\u662f1\u3002\u603b\u662f0xFFF,<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u4ee3\u8868\u4e00\u4e2aADTS\u5e27\u7684\u5f00\u59cb<\/mark><\/strong>\uff0c\u4f5c\u4e3a\u5206\u754c\u7b26\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u7528\u4e8e\u540c\u6b65\u6bcf\u5e27\u8d77\u59cb\u4f4d\u7f6e<\/mark><\/strong>\u3002<\/li>\n\n\n\n<li><em><strong>ID<\/strong><\/em>\uff1a\u5360\u7528 1 bit\uff1b<br>\u8868\u793a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">MPEG\u7248\u672c<\/mark><\/strong>\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">0\u4ee3\u8868MPEG-4<\/mark><\/strong>, 1\u4ee3\u8868MPEG-2\uff0c\u4e00\u822c\u7528 0\uff0c\u56e0\u4e3a\u90fd\u662f\u5c5e\u4e8e MPEG \u7684\u89c4\u8303.\u3002<\/li>\n\n\n\n<li><strong><em>layer<\/em><\/strong>\uff1a\u5360\u7528 2 bit\uff1b<br><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u56fa\u5b9a\u4e3a&nbsp;<code>00<\/code>\uff0c\u4fdd\u7559\u5b57\u6bb5<\/mark><\/strong><\/li>\n\n\n\n<li><strong><em>protection_absent<\/em><\/strong>\uff1a\u5360\u7528 1 bit\uff1b\uff08<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u7528\u4e8e\u5224\u65ad\u662f\u5426\u7981\u7528CRC\u6821\u9a8c<\/mark><\/strong>\uff09<br>\u8bbe\u7f6e 1 \u8868\u793a\u6ca1\u6709CRC\uff0c\u6574\u4e2aADST\u5934\u4e3a7\u5b57\u8282\uff1b0 \u8868\u793a\u6709CRC\uff0c\u6574\u4e2aADST\u5934\u4e3a9\u5b57\u8282\u3002\u5173\u4e8eCRC\u662f\u4ec0\u4e48\u53ca\u5b83\u7684\u4f5c\u7528\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">CRC\uff08Cyclic Redundancy Check\uff0c\u5faa\u73af\u5197\u4f59\u6821\u9a8c\uff09<\/mark><\/strong>\u662f\u4e00\u79cd\u9519\u8bef\u68c0\u6d4b\u673a\u5236\uff0c\u7528\u4e8e\u5728\u6570\u636e\u4f20\u8f93\u6216\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u68c0\u6d4b\u6bd4\u7279\u7ea7\u9519\u8bef\uff08\u6bd4\u5982\u4fe1\u53f7\u5e72\u6270\u5bfc\u81f4\u7684\u4f4d\u7ffb\u8f6c\uff09\u3002\u5728ADTS\u4e2d\uff0cCRC\u5b57\u6bb5\u662f\u53ef\u9009\u7684\uff0c\u7531protection_absent\u4f4d\u63a7\u5236\uff1aprotection_absent = 0 \u2192 \u5b58\u5728CRC\u5b57\u6bb5\uff0816\u4f4d\u6821\u9a8c\u7801\uff0c\u7d27\u8ddf\u5728\u56fa\u5b9a\u5934\u90e8\u4e4b\u540e\uff09\u3002<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">protection_absent = 1 \u2192 \u65e0CRC\u6821\u9a8c<\/mark><\/strong>\uff0c\u8282\u77012\u5b57\u8282\u5f00\u9500\u3002\u97f3\u9891\u6d41\uff08\u5982\u7f51\u7edc\u4f20\u8f93\u3001\u65e0\u7ebf\u5e7f\u64ad\uff09\u53ef\u80fd\u56e0\u566a\u58f0\u6216\u5e72\u6270\u5bfc\u81f4\u6570\u636e\u635f\u574f\uff0cCRC\u80fd\u53d1\u73b0\u9519\u8bef\u5e27\u5e76\u89e6\u53d1\u91cd\u4f20\u6216\u4e22\u5f03\uff0c\u907f\u514d\u64ad\u653e\u6742\u97f3\uff0c\u5b83\u5c31\u662f\u4e00\u4e2a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u97f3\u9891\u5e27\u7684\u201c\u5c01\u6761\u201d\uff0c\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027<\/mark><\/strong>\u3002<\/li>\n\n\n\n<li><strong><em>profile_ObjectType<\/em><\/strong>\uff1a\u5360\u7528 2 bit\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u8868\u793a\u4f7f\u7528\u7684AAC\u89c4\u683c(profile)<\/mark><\/strong>\uff1b<br>\u8be5\u5b57\u6bb5\u7684\u89e3\u91ca\u53d6\u51b3\u4e8eID\u4f4d\u7684\u503c\u3002\u5982\u679cID\u7b49\u4e8e1\uff0c\u5219\u8be5\u5b57\u6bb5\u5305\u542b\u4e0eISO\/IEC 13818-7\u4e2d\u5b9a\u4e49\u7684ADTS\u6d41\u4e2d\u7684\u914d\u7f6e\u6587\u4ef6\u5b57\u6bb5\u76f8\u540c\u7684\u4fe1\u606f\uff0c\u4e5f\u5c31\u662fMPEG-2\u7684\u89c4\u683c\uff1b\u5f53ID\u4e3a0\u662f\u8868\u793a\u7684\u662fMPEG-4\u7684\u89c4\u683c\uff0c\u8be5\u5b57\u6bb5\u7684\u503c\u7b49\u4e8e Audio Object Type \u7684\u503c\u51cf1\u3002\u5b57\u6bb5\u53d6\u503c\u5982\u4e0b\u9762\u56fe\u7247\u7684\u8868\u683c<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-12.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"193\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-12.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-343\"  sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>sampling_frequency_index<\/code>\uff1a\u5360\u7528 4 bit\uff1b<br>\u8868\u793a\u91c7\u6837\u7387\u4e0b\u6807\u7d22\u5f15\uff0c\u5b57\u6bb5\u53d6\u503c\u53ca\u89e3\u91ca\u5982\u4e0b\u56fe\uff1a \u4f8b\u59820\u5bf9\u5e9496000HZ<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-13.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"508\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-13.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-360\"  sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>private_bit\uff1a\u5360\u7528 1 bit\uff0c\u4f5c\u4e3a\u79c1\u6709\u4f4d\uff0c\u7528\u6237\u81ea\u5b9a\u4e49\uff0c\u7f16\u7801\u65f6\u8bbe\u7f6e\u4e3a0\uff0c\u89e3\u7801\u65f6\u5ffd\u7565\uff1b<br>\u8be6\u7ec6\u89e3\u91ca\u53c2\u89c1 ISO\/IEC 11172-3, subclause 2.4.2.3 (Table 8)<\/li>\n\n\n\n<li>channel_configuration\uff1a\u5360\u7528 3 bit\uff1b<br>\u901a\u9053\u914d\u7f6e\u5373\u58f0\u9053\u6570\uff0c\u4e00\u822c 2 \u8868\u793a\u7acb\u4f53\u58f0\u53cc\u58f0\u9053\u3002\u66f4\u591a\u7684\u503c\u53c2\u8003\u4e0b\u56fe\uff1a<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-14-1024x648.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"648\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-14-1024x648.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-367\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>original_copy<\/code>\uff1a\u5360\u7528 1 bit\uff0c\u539f\u59cb\/\u590d\u5236\u6807\u5fd7\uff0c0\u8868\u793a\u5f53\u524d\u5e27\u662f\u62f7\u8d1d\u662f\u975e\u9996\u6b21\u53d1\u884c\u800c\u7ecf\u8fc7\u590d\u5236\u518d\u7f16\u7801\u7684\u7248\u672c\uff0c1\u8868\u793a\u662f\u539f\u59cb\u662f\u7b2c\u4e00\u6b21\u53d1\u884c\u7684\u539f\u59cb\u6bcd\u5e26\/\u6bcd\u76d8<\/li>\n\n\n\n<li><code>home<\/code>\uff1a\u5360\u7528 1 bit\uff0c\u8be5\u4f4d\u7eaf\u7cb9\u4fdd\u7559\u7ed9\u5e7f\u64ad\u6216\u7248\u6743\u7cfb\u7edf\u4f7f\u7528\uff0c\u5b9e\u9645\u7f16\u7801\u5668\/\u64ad\u653e\u5668\u90fd\u4f1a\u586b <strong>0<\/strong>\uff0c\u8868\u793a\u201c\u65e0\u7279\u6b8a\u5bb6\u7528\u6807\u5fd7\u201d\uff0c1\u8868\u793a\u5bb6\u7528\uff0c\u7f16\u7801\u65f6\u8bbe\u7f6e\u4e3a0\uff0c\u89e3\u7801\u65f6\u5ffd\u7565\uff0c\u5bf9\u89e3\u7801\u3001\u64ad\u653e\u3001\u7248\u6743\u5747\u65e0\u5f71\u54cd\uff0c\u53ef\u5ffd\u7565<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u27283.2.1.2 <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">\u53ef\u53d8\u5934\u90e8(adts_variable_header)<\/mark><\/strong><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">ADTS \u53ef\u53d8\u5934\u90e8\u63d0\u4f9b\u4e86 <strong>\u5e27\u7ea7\u522b\u7684\u52a8\u6001\u4fe1\u606f<\/strong>\uff0c\u7ed3\u5408\u56fa\u5b9a\u5934\u90e8\uff0c\u89e3\u7801\u5668\u5c31\u80fd\u5b8c\u6574\u89e3\u6790\u6bcf\u4e00\u5e27\u7684\u683c\u5f0f\u548c\u5185\u5bb9\uff0c\u5b83\u7684\u5173\u952e\u4f5c\u7528\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong class=\"\">\u5b9a\u4f4d\u5e27\u8fb9\u754c<\/strong>\uff08\u901a\u8fc7 <code>aac_frame_length<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong class=\"\">\u63a7\u5236\u89e3\u7801\u5668\u7f13\u51b2<\/strong>\uff08\u901a\u8fc7 <code>adts_buffer_fullness<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong class=\"\">\u652f\u6301\u7248\u6743\u6807\u8bb0<\/strong>\uff08\u901a\u8fc7 <code>copyright_identification_*<\/code> \u4f4d\uff09\u3002<\/li>\n\n\n\n<li><strong class=\"\">\u652f\u6301\u591a AAC \u6570\u636e\u5757\u6253\u5305<\/strong>\uff08\u901a\u8fc7 <code>number_of_raw_data_blocks_in_frame<\/code>\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-15.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"957\" height=\"292\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-15.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-377\"  sizes=\"auto, (max-width: 957px) 100vw, 957px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u6bb5\u89e3\u6790\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>copyright_identification_bit\uff1a\u5360\u7528 1 bit\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u7248\u6743\u6807\u8bc6\u4f4d\uff0c\u4e0e\u4e0b\u4e00\u5b57\u6bb5\u914d\u5408\u4f7f\u7528<\/mark><\/strong>\uff0c\uff080\u8868\u793a\u4e0d\u5305\u542b\u7248\u6743\u6807\u8bc6\uff0c1\u6807\u8bc6\u5305\u542b\uff09\u7f16\u7801\u65f6\u8bbe\u7f6e\u4e3a0\uff0c\u89e3\u7801\u65f6\u5ffd\u7565\uff1b<\/li>\n\n\n\n<li>copyright_identification_start\uff1a\u5360\u7528 1 bit\uff0c<strong>\u7248\u6743\u6807\u8bc6\u5f00\u59cb\u6807\u5fd7<\/strong>\uff0c\u7f16\u7801\u65f6\u8bbe\u7f6e\u4e3a0\uff0c\u89e3\u7801\u65f6\u5ffd\u7565\uff1b<\/li>\n\n\n\n<li>frame_length\uff1a\u5360\u7528 13 bit\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u5f53\u524d ADTS \u5e27\u7684\u957f\u5ea6<\/mark><\/strong>\uff0c<strong><em>\u5305\u62ec ADTS \u5934(\u56fa\u5b9a+\u53ef\u53d8)\u548c AAC \u539f\u59cb\u6d41<\/em><\/strong>\uff0c\u5355\u4f4dbyte\uff1b<\/li>\n\n\n\n<li>adts_buffer_fullness\uff1a\u5360\u7528 11 bit\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u89e3\u7801\u5668\u7f13\u51b2\u533a\u5360\u7528\u7a0b\u5ea6\uff0c\u7528\u4e8e\u7801\u7387\u63a7\u5236<\/mark><\/strong>\uff0c0x7FF \u8868\u793a\u7801\u7387\u53ef\u53d8\u7684\u7801\u6d41\uff0c0x000 \u8868\u793a\u56fa\u5b9a\u7801\u7387\u7684\u7801\u6d41\uff1b<br>\u5b9e\u9645\u7684AAC\u6587\u4ef6\u4e2d\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u4f1a\u51fa\u73b0\u4e0d\u7b49\u4e8e0x7FF\u30010x000\u7684\u60c5\u51b5\uff0c\u4e0b\u9762\u662fGPT\u7684\u56de\u590d\uff1aadts_buffer_fullness\u5b57\u6bb5\u8868\u793aAAC\u89e3\u7801\u5668\u4e2d\u7684\u7f13\u51b2\u533a\u5f53\u524d\u7684\u586b\u5145\u91cf\u3002\u8fd9\u4e2a\u5b57\u6bb5\u7684\u503c\u4ee3\u8868\u4e86\u89e3\u7801\u5668\u8f93\u5165\u7f13\u51b2\u533a\u4e2d\u672a\u4f7f\u7528\u7684\u5b57\u8282\u6570\uff0c\u53ef\u4ee5\u7528\u6765\u8861\u91cf\u89e3\u7801\u5668\u7f13\u51b2\u533a\u7684\u5269\u4f59\u7a7a\u95f4\u3002\u7406\u60f3\u72b6\u6001\u4e0b\uff0c\u8fd9\u4e2a\u503c\u5e94\u8be5\u4fdd\u6301\u5728\u4e00\u4e2a\u5408\u9002\u7684\u8303\u56f4\u5185\uff0c\u4ee5\u786e\u4fdd\u89e3\u7801\u5668\u80fd\u591f\u6301\u7eed\u5730\u63a5\u6536\u548c\u5904\u7406\u97f3\u9891\u6570\u636e\uff0c\u800c\u4e0d\u4f1a\u53d1\u751f\u6ea2\u51fa\u6216\u6b20\u6d41\u7684\u60c5\u51b5\u3002<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>number_of_raw_data_blocks_in_frame\uff1a\u5360\u7528 2 bit\uff1b<br>\u8be5\u5b57\u6bb5\u8868\u793a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u5f53\u524dADST\u5e27\u4e2d\u6240\u5305\u542b\u7684AAC\u5e27\u7684\u4e2a\u6570\u51cf\u4e00<\/mark><\/strong>\u3002\u4e3a\u4e86\u6700\u5927\u7684\u517c\u5bb9\u6027\u901a\u5e38\u6bcf\u4e2aADTS frame \u5305\u542b\u4e00\u4e2aAAC frame\uff0c\u6240\u4ee5\u8be5\u503c\u4e00\u822c\u4e3a0\u3002\u4e00\u4e2aAAC\u539f\u59cb\u5e27\u5305\u542b\u4e00\u6bb5\u65f6\u95f4\u51851024\u4e2a\u91c7\u6837\u53ca\u76f8\u5173\u6570\u636e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/4.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/4.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-252\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001 AAC\u683c\u5f0f\u97f3\u9891\u6587\u4ef6\u89e3\u6790 (\u7f16\u8bd1\u5668+\u4ee3\u7801\u5b9e\u8df5)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728\u8f83\u5e38\u4f7f\u7528\u7684AAC\u6587\u4ef6\u683c\u5f0f\u662f\u4f7f\u7528ADTS\u5e27\u6765\u4fdd\u5b58\u7684\uff0c\u6240\u4ee5\u540e\u9762\u5c31\u4ee5ADTS\u683c\u5f0f\u7684AAC\u6587\u4ef6\u7684\u89e3\u6790\u8fc7\u7a0b\u8fdb\u884c\u5c55\u5f00\uff0c\u901a\u8fc7\u5b9e\u8df5\u5de9\u56fa\u52a0\u5f3a\u5bf9ADTS\u5e27\u7ed3\u6784\u7684\u8ba4\u8bc6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u27284.1 aac\u6587\u4ef6\u89e3\u6790(\u7f16\u8bd1\u5668+ffmpeg\u547d\u4ee4)<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u27284.1.1 \u7f16\u8bd1\u5668\u67e5\u770bADTS\u5934\u5404\u5b57\u6bb5<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4f7f\u7528\u7684\u662f\u4e00\u4e2a\u5728\u7ebf\u7f51\u9875\u7684Hex16\u8fdb\u5236\u7f16\u8f91\u5668\u6765\u67e5\u770baac\u6587\u4ef6\u7684 <a href=\"https:\/\/hexed.it\/\">HexEd.it \u2014 \u57fa\u4e8e\u6d4f\u89c8\u5668\u7684\u5341\u516d\u8fdb\u5236\u7f16\u8f91\u5668<\/a> \u5982\u4e0b\u56fe \u6211\u4eec\u53ef\u4ee5\u5bf9\u4ed6\u4eec\u8fdb\u884c\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u7136\u540e\u6309\u4f4d\u6765\u770b<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-18-1024x305.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"305\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-18-1024x305.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-417\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ca1\u6709CRC\u7684\u60c5\u51b5\u4e0b\uff0c\u6587\u4ef6\u5f00\u5934\u76847\u4e2a\u5b57\u8282\u662fADTS\u5e27\u5934\u90e8\uff0c\u8fd9\u91cc7\u4e2a\u5b57\u8282\u7684\u6570\u636e\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>FF F1 50 80 03 9F FC<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5c06\u8fd97\u4e2a\u5b57\u8282\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u6765\u770b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u8282<\/th><th>\u4e8c\u8fdb\u5236\uff08\u517156\u4f4d\uff09<\/th><\/tr><\/thead><tbody><tr><td>FF<\/td><td>11111111<\/td><\/tr><tr><td>F1<\/td><td>11110001<\/td><\/tr><tr><td>50<\/td><td>01010000<\/td><\/tr><tr><td>80<\/td><td>10000000<\/td><\/tr><tr><td>03<\/td><td>00000011<\/td><\/tr><tr><td>9F<\/td><td>10011111<\/td><\/tr><tr><td>FC<\/td><td>11111100<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u6309 ADTS \u7ed3\u6784\u89e3\u6790\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d7\u5b57\u8282\u7684\u4e8c\u8fdb\u5236\u662f\u8fd9\u6837\u7684\uff1a11111111 11110001 01010000 10000000 00000011 10011111 11111100 \u7136\u540e\u4e0b\u9762\u5c31\u6309\u6bcf\u4e2a\u5b57\u6bb5\u7684\u4f4d\u5bbd\u8fdb\u884c\u67e5\u770b \u8f6c\u4e3a\u5341\u8fdb\u5236\u7136\u540e\u6bd4\u5bf9<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u6bb5\u540d<\/th><th>\u4f4d(bit)<\/th><th>\u503c\uff08\u4e8c\u8fdb\u5236\uff09<\/th><th>\u5341\u8fdb\u5236<\/th><th>\u542b\u4e49<\/th><\/tr><\/thead><tbody><tr><td><strong class=\"\">syncword<\/strong><\/td><td>12<\/td><td><code>111111111111<\/code><\/td><td>0xFFF<\/td><td>\u540c\u6b65\u5b57\u6b63\u786e<\/td><\/tr><tr><td><strong class=\"\">ID<\/strong><\/td><td>1<\/td><td><code>0<\/code><\/td><td>0<\/td><td>MPEG-4<\/td><\/tr><tr><td><strong class=\"\">layer<\/strong><\/td><td>2<\/td><td><code>00<\/code><\/td><td>0<\/td><td>\u4fdd\u7559\uff0c\u5fc5\u987b\u4e3a0<\/td><\/tr><tr><td><strong class=\"\">protection_absent<\/strong><\/td><td>1<\/td><td><code>1<\/code><\/td><td>1<\/td><td>\u2705&nbsp;<strong class=\"\">\u65e0 CRC \u6821\u9a8c<\/strong><\/td><\/tr><tr><td><strong class=\"\">profile_ObjectType<\/strong><\/td><td>2<\/td><td><code>0<\/code>1<\/td><td>1<\/td><td>\u2705&nbsp;<strong class=\"\">AAC LC\uff08Low Complexity\uff09<\/strong><\/td><\/tr><tr><td><strong class=\"\">sampling_frequency_index<\/strong><\/td><td>4<\/td><td><code>010<\/code>0<\/td><td>4<\/td><td>\u2705 \u91c7\u6837\u7387 =&nbsp;<strong class=\"\">44100Hz<\/strong>\uff08\u67e5\u8868\uff09<\/td><\/tr><tr><td><strong class=\"\">private_bit<\/strong><\/td><td>1<\/td><td><code>0<\/code><\/td><td>0<\/td><td>\u2705 \u672a\u4f7f\u7528<\/td><\/tr><tr><td><strong class=\"\">channel_configuration<\/strong><\/td><td>3<\/td><td><code>010<\/code><\/td><td>2<\/td><td><strong>\u7acb\u4f53\u58f0\uff082 \u58f0\u9053<\/strong>\uff09<\/td><\/tr><tr><td><strong class=\"\">original_copy<\/strong><\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>\u5f53\u524d\u5e27\u662f&nbsp;<strong class=\"\">\u62f7\u8d1d<\/strong><\/td><\/tr><tr><td><strong class=\"\">home<\/strong><\/td><td>1<\/td><td><code>0<\/code><\/td><td>0<\/td><td>\u672a\u4f7f\u7528<\/td><\/tr><tr><td><strong class=\"\">copyright_identification_bit<\/strong><\/td><td>1<\/td><td><code>0<\/code><\/td><td>0<\/td><td>\u65e0\u7248\u6743\u6807\u8bc6<\/td><\/tr><tr><td><strong class=\"\">copyright_identification_start<\/strong><\/td><td>1<\/td><td><code>0<\/code><\/td><td>0<\/td><td>\u975e\u7248\u6743\u5e8f\u5217\u8d77\u59cb<\/td><\/tr><tr><td><strong class=\"\">aac_frame_length<\/strong><\/td><td>13<\/td><td>0000000011100<\/td><td>28(\u5b57\u8282)<\/td><td>\u5e27\u603b\u957f\u5ea6<\/td><\/tr><tr><td><strong class=\"\">adts_buffer_fullness<\/strong><\/td><td>11<\/td><td>11111111111<\/td><td>0x7FF=2047<\/td><td>0x7FF\u7801\u7387\u53ef\u53d8\u7684\u7801\u6d41<\/td><\/tr><tr><td><strong class=\"\">number_of_raw_data_blocks_in_frame<\/strong><\/td><td>2<\/td><td><code>00<\/code><\/td><td>0<\/td><td>\u6bcf\u5e27\u542b&nbsp;<strong class=\"\">1<\/strong>aac\u6570\u636e\u5757<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u770b\u53ef\u80fd\u66f4\u76f4\u89c2\u70b9\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u662f\u56fa\u5b9a\u5934\u90e8\u7684\u5404\u5b57\u6bb5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bit 0-11  : syncword           111111111111\nbit 12    : ID                 0\nbit 13-14 : layer              00\nbit 15    : protection_absent  1\nbit 16-17 : profile            01\nbit 18-21 : sf_index           0100   \u2192 44.1 kHz\nbit 22    : private_bit        0\nbit 23-25 : channel_config     010    \u2192 2 \u58f0\u9053\nbit 26    : original_copy      0\nbit 27    : home               0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u662f\u53ef\u53d8\u5934\u90e8\u7684\u5404\u5b57\u6bb5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bit 28    : copyright_id_bit   0\nbit 29    : copyright_start    0\nbit 30-42 : aac_frame_length   0000000011100  \u2192 28\u5b57\u8282\u5e27\u957f\u5ea6(\u5934+\u540e\u9762\u6570\u636e)\nbit 43-53 : adts_buffer_fullness 11111111111 \u2192 0x7FF\u7801\u7387\u53ef\u53d8\u7684\u7801\u6d41\nbit 54-55 : raw_blocks          00 \u2192 \u6bcf\u5e27\u542b&nbsp;<strong class=\"\">1<\/strong>aac\u6570\u636e\u5757<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u5f97\u5230\u4ee5\u4e0b\u7ed3\u8bba\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u5e27 <strong class=\"\">ADTS-AAC LC<\/strong> \u6570\u636e\uff0c\u683c\u5f0f\u4e3a <strong class=\"\">MPEG-4\u300144.1 kHz\u3001\u7acb\u4f53\u58f0\u3001\u65e0 CRC<\/strong>\uff1b<br>\u5e27\u603b\u957f\u5ea6 <strong>28 \u5b57\u8282<\/strong>\uff0c\u91c7\u7528 <strong>VBR \u7801\u7387<\/strong>\uff0c\u4e14 <strong>\u6bcf\u5e27\u4ec5\u542b 1 \u4e2a AAC \u539f\u59cb\u6570\u636e\u5757<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u27284.1.2 FFmpeg\u68c0\u67e5\u5206\u6790\u662f\u5426\u6b63\u786e<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u901a\u8fc7FFmpeg\u68c0\u67e5ADTS\u5e27\u7ed3\u6784\u662f\u5426\u548c\u5206\u6790\u7684\u4e00\u6837<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -v error -i input.aac -c copy -f adts NUL<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u547d\u4ee4\u53ef\u4ee5\u770b\u770b\u201c\u8fd9\u4e2a\u6587\u4ef6\u662f\u4e0d\u662f\u6807\u51c6\u7684 ADTS\u201d\uff0c\u82e5\u6587\u4ef6\u6709\u9519\u8bef\uff0cFFmpeg \u4f1a\u5728 stderr \u76f4\u63a5\u62a5 \u201cADTS syncword missing\u201d \u6216 \u201cCRC mismatch\u201d\u3002\u65e0\u4efb\u4f55\u62a5\u9519\u5373\u8bf4\u660e\u5934\u4fe1\u606f\u4e0e\u4f60\u5206\u6790\u7684\u4e00\u81f4\uff0c\u6587\u4ef6\u53ef\u88ab\u6b63\u5e38\u8bc6\u522b\u3002<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">\u7ed3\u679c\u8bc1\u660e\u662f\u6807\u51c6\u7684ADTS\u7ed3\u6784\u3002<\/mark><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffprobe -v error -show_entries stream=sample_rate,profile,channels,channel_layout -select_streams a:0 input.aac<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u547d\u4ee4\u7247\u6bb5<\/th><th>\u4f5c\u7528<\/th><\/tr><\/thead><tbody><tr><td><code>ffprobe<\/code><\/td><td>FFmpeg \u5957\u4ef6\u91cc\u7684\u201c\u5a92\u4f53\u4fe1\u606f\u63a2\u6d4b\u5668\u201d\uff0c\u53ea\u8bfb\u6587\u4ef6\u3001\u4e0d\u89e3\u7801\u8f93\u51fa\u3002<\/td><\/tr><tr><td><code>-v error<\/code><\/td><td>\u628a\u65e5\u5fd7\u7ea7\u522b\u8bbe\u4e3a&nbsp;<code>error<\/code>\uff0c\u53ea\u6253\u5370\u771f\u6b63\u7684\u9519\u8bef\uff0c\u5ffd\u7565 info\/debug \u4fe1\u606f\uff0c\u8f93\u51fa\u66f4\u5e72\u51c0\u3002<\/td><\/tr><tr><td><code>-show_entries stream=sample_rate,profile,channels,channel_layout<\/code><\/td><td>\u544a\u8bc9 ffprobe\uff1a\u53ea\u628a&nbsp;<strong class=\"\">stream\uff08\u6d41\uff09\u7ea7\u522b<\/strong>&nbsp;\u91cc\u7684&nbsp;<code>sample_rate<\/code>\u3001<code>profile<\/code>\u3001<code>channels<\/code>\u3001<code>channel_layout<\/code>&nbsp;\u56db\u4e2a\u5b57\u6bb5\u6253\u5370\u51fa\u6765\uff0c\u522b\u7684\u90fd\u4e0d\u663e\u793a\u3002<\/td><\/tr><tr><td><code>-select_streams a:0<\/code><\/td><td>\u5728\u6240\u6709\u6d41\u91cc\u53ea\u9009&nbsp;<strong class=\"\">\u7b2c 0 \u6761\u97f3\u9891\u6d41<\/strong>\uff08a:0 = \u7b2c 1 \u6761\u97f3\u9891\u6d41\uff09\u3002<\/td><\/tr><tr><td><code>input.aac<\/code><\/td><td>\u8981\u63a2\u6d4b\u7684\u6587\u4ef6\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7ffprobe\u8fdb\u884c\u8f93\u51fa\u7ed3\u6784\u5316\u4fe1\u606f\uff0c\u53ef\u4ee5\u770b\u5230\u548c\u6211\u4eec\u89e3\u6790\u7684\u662f\u4e00\u6837\u7684\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">aac\u89c4\u683c\u4e3aLC<\/mark><\/strong>\u7684\uff08\u5bf9\u5e94<strong class=\"\">profile_ObjectType<\/strong>\u5b57\u6bb5\uff09\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u91c7\u6837\u7387\u4e3a44100<\/mark><\/strong>\uff08\u5bf9\u5e94<strong class=\"\">profile_ObjectType<\/strong>\u5b57\u6bb5\uff09\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">channels=2\u548cstereo\u7acb\u4f53\u58f02\u58f0\u9053<\/mark><\/strong>\uff08\u5bf9\u5e94<strong class=\"\">channel_configuration<\/strong>\u5b57\u6bb5\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-17.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"310\" height=\"154\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-17.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-412\"  sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u27284.2 C\u8bed\u8a00\u4ee3\u7801\u89e3\u6790AAC\u6587\u4ef6<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u6700\u7b80\u5355\u7684\u89c6\u97f3\u9891\u6570\u636e\u5904\u7406\u793a\u4f8b\n * Simplest MediaData Test\n *\n * \u96f7\u9704\u9a85 Lei Xiaohua\n * leixiaohua1020@126.com\n * \u4e2d\u56fd\u4f20\u5a92\u5927\u5b66\/\u6570\u5b57\u7535\u89c6\u6280\u672f\n * Communication University of China \/ Digital TV Technology\n * http:\/\/blog.csdn.net\/leixiaohua1020\n *\n * \u672c\u9879\u76ee\u5305\u542b\u5982\u4e0b\u51e0\u79cd\u89c6\u97f3\u9891\u6d4b\u8bd5\u793a\u4f8b\uff1a\n *  (1)\u50cf\u7d20\u6570\u636e\u5904\u7406\u7a0b\u5e8f\u3002\u5305\u542bRGB\u548cYUV\u50cf\u7d20\u683c\u5f0f\u5904\u7406\u7684\u51fd\u6570\u3002\n *  (2)\u97f3\u9891\u91c7\u6837\u6570\u636e\u5904\u7406\u7a0b\u5e8f\u3002\u5305\u542bPCM\u97f3\u9891\u91c7\u6837\u683c\u5f0f\u5904\u7406\u7684\u51fd\u6570\u3002\n *  (3)H.264\u7801\u6d41\u5206\u6790\u7a0b\u5e8f\u3002\u53ef\u4ee5\u5206\u79bb\u5e76\u89e3\u6790NALU\u3002\n *  (4)AAC\u7801\u6d41\u5206\u6790\u7a0b\u5e8f\u3002\u53ef\u4ee5\u5206\u79bb\u5e76\u89e3\u6790ADTS\u5e27\u3002\n *  (5)FLV\u5c01\u88c5\u683c\u5f0f\u5206\u6790\u7a0b\u5e8f\u3002\u53ef\u4ee5\u5c06FLV\u4e2d\u7684MP3\u97f3\u9891\u7801\u6d41\u5206\u79bb\u51fa\u6765\u3002\n *  (6)UDP-RTP\u534f\u8bae\u5206\u6790\u7a0b\u5e8f\u3002\u53ef\u4ee5\u5c06\u5206\u6790UDP\/RTP\/MPEG-TS\u6570\u636e\u5305\u3002\n *\n * This project contains following samples to handling multimedia data:\n *  (1) Video pixel data handling program. It contains several examples to handle RGB and YUV data.\n *  (2) Audio sample data handling program. It contains several examples to handle PCM data.\n *  (3) H.264 stream analysis program. It can parse H.264 bitstream and analysis NALU of stream.\n *  (4) AAC stream analysis program. It can parse AAC bitstream and analysis ADTS frame of stream.\n *  (5) FLV format analysis program. It can analysis FLV file and extract MP3 audio stream.\n *  (6) UDP-RTP protocol analysis program. It can analysis UDP\/RTP\/MPEG-TS Packet.\n *\n *\/\n#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;string.h&gt;\n\n\nint getADTSframe(unsigned char* buffer, int buf_size, unsigned char* data ,int* data_size){\n\tint size = 0;\n\n\tif(!buffer || !data || !data_size ){\n\t\treturn -1;\n\t}\n\n\twhile(1){\n\t\tif(buf_size  &lt; 7 ){\n\t\t\treturn -1;\n\t\t}\n\t\t\/\/Sync words\n\t\tif((buffer&#91;0] == 0xff) &amp;&amp; ((buffer&#91;1] &amp; 0xf0) == 0xf0) ){\n\t\t\tsize |= ((buffer&#91;3] &amp; 0x03) &lt;&lt;11);     \/\/high 2 bit\n\t\t\tsize |= buffer&#91;4]&lt;&lt;3;                \/\/middle 8 bit\n\t\t\tsize |= ((buffer&#91;5] &amp; 0xe0)&gt;&gt;5);        \/\/low 3bit\n\t\t\tbreak;\n\t\t}\n\t\t--buf_size;\n\t\t++buffer;\n\t}\n\n\tif(buf_size &lt; size){\n\t\treturn 1;\n\t}\n\n\tmemcpy(data, buffer, size);\n\t*data_size = size;\n\n\treturn 0;\n}\n\nint simplest_aac_parser(char *url)\n{\n\tint data_size = 0;\n\tint size = 0;\n\tint cnt=0;\n\tint offset=0;\n\n\t\/\/FILE *myout=fopen(\"output_log.txt\",\"wb+\");\n\tFILE *myout=stdout;\n\n\tunsigned char *aacframe=(unsigned char *)malloc(1024*5);\n\tunsigned char *aacbuffer=(unsigned char *)malloc(1024*1024);\n\n\tFILE *ifile = fopen(url, \"rb\");\n\tif(!ifile){\n\t\tprintf(\"Open file error\\n\");\n\t\treturn -1;\n\t}\n\n\tprintf(\"-----+- ADTS Frame Table -+------+\\n\");\n\tprintf(\" NUM | Profile | Frequency| Size |\\n\");\n\tprintf(\"-----+---------+----------+------+\\n\");\n\n\twhile(!feof(ifile)){\n\t\tdata_size = fread(aacbuffer+offset, 1, 1024*1024-offset, ifile);\n\t\tunsigned char* input_data = aacbuffer;\n\n\t\twhile(1)\n\t\t{\n\t\t\tint ret=getADTSframe(input_data, data_size, aacframe, &amp;size);\n\t\t\tif(ret==-1){\n\t\t\t\tbreak;\n\t\t\t}else if(ret==1){\n\t\t\t\tmemcpy(aacbuffer,input_data,data_size);\n\t\t\t\toffset=data_size;\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tchar profile_str&#91;10]={0};\n\t\t\tchar frequence_str&#91;10]={0};\n\n\t\t\tunsigned char profile=aacframe&#91;2]&amp;0xC0;\n\t\t\tprofile=profile&gt;&gt;6;\n\t\t\tswitch(profile){\n\t\t\tcase 0: sprintf(profile_str,\"Main\");break;\n\t\t\tcase 1: sprintf(profile_str,\"LC\");break;\n\t\t\tcase 2: sprintf(profile_str,\"SSR\");break;\n\t\t\tdefault:sprintf(profile_str,\"unknown\");break;\n\t\t\t}\n\n\t\t\tunsigned char sampling_frequency_index=aacframe&#91;2]&amp;0x3C;\n\t\t\tsampling_frequency_index=sampling_frequency_index&gt;&gt;2;\n\t\t\tswitch(sampling_frequency_index){\n\t\t\tcase 0: sprintf(frequence_str,\"96000Hz\");break;\n\t\t\tcase 1: sprintf(frequence_str,\"88200Hz\");break;\n\t\t\tcase 2: sprintf(frequence_str,\"64000Hz\");break;\n\t\t\tcase 3: sprintf(frequence_str,\"48000Hz\");break;\n\t\t\tcase 4: sprintf(frequence_str,\"44100Hz\");break;\n\t\t\tcase 5: sprintf(frequence_str,\"32000Hz\");break;\n\t\t\tcase 6: sprintf(frequence_str,\"24000Hz\");break;\n\t\t\tcase 7: sprintf(frequence_str,\"22050Hz\");break;\n\t\t\tcase 8: sprintf(frequence_str,\"16000Hz\");break;\n\t\t\tcase 9: sprintf(frequence_str,\"12000Hz\");break;\n\t\t\tcase 10: sprintf(frequence_str,\"11025Hz\");break;\n\t\t\tcase 11: sprintf(frequence_str,\"8000Hz\");break;\n\t\t\tdefault:sprintf(frequence_str,\"unknown\");break;\n\t\t\t}\n\n\n\t\t\tfprintf(myout,\"%5d| %8s|  %8s| %5d|\\n\",cnt,profile_str ,frequence_str,size);\n\t\t\tdata_size -= size;\n\t\t\tinput_data += size;\n\t\t\tcnt++;\n\t\t}   \n\n\t}\n\tfclose(ifile);\n\tfree(aacbuffer);\n\tfree(aacframe);\n\n\treturn 0;\n}\n\nint main()\n{\n\tsimplest_aac_parser((char*)\".\/audio_chn0.aac\");\n\treturn 0;\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5757\u4ee3\u7801\u662f<a class=\"\" href=\"https:\/\/blog.csdn.net\/leixiaohua1020\" target=\"_blank\" rel=\"noreferrer noopener\">\u96f7\u9704\u9a85<\/a>\u5927\u4f6c\u7684AAC\u97f3\u9891\u7801\u6d41\u89e3\u6790\u91cc\u9762\u7684\uff0c\u4fdd\u5b58\u540e\u8fdb\u884cgcc simplest_mediadata_aac.cpp\u7f16\u8bd1\uff0c\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-19.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"669\" height=\"460\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/image-19.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-495\"  sizes=\"auto, (max-width: 669px) 100vw, 669px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/5.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"190\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/5.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-501\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u4e2a\u4eba\u601d\u8003<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7Hex16\u8fdb\u5236\u7f16\u8bd1\u5668\u67e5\u770baac\u6587\u4ef6\uff0c\u7136\u540e\u8f6c\u4e3a2\u8fdb\u5236\u6839\u636e\u6bcf\u4e2a\u5b57\u6bb5\u7684\u4f4d\u5bbd\u8fdb\u884c\u5206\u6790\u5b57\u6bb5\u7684\u503c\u548c\u5c5e\u6027\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u66f4\u597d\u7684\u53bb\u8ba4\u8bc6ATDS\u7684\u56fa\u5b9a\u5934\u90e8\u548c\u53ef\u53d8\u5934\u90e8\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u501f\u52a9ffmpeg\u548c\u524d\u4eba\u7684\u4e00\u4e9b\u4ee3\u7801\u8fdb\u884c\u8f93\u51fa\u7ed3\u6784\u6700\u540e\u9a8c\u8bc1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53c2\u8003\u94fe\u63a5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/blog.csdn.net\/leixiaohua1020\/article\/details\/11822537\">\u7406\u89e3AAC\u97f3\u9891\u6587\u4ef6\u683c\u5f0f\uff1aADIF\u4e0eADTS-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/blog.csdn.net\/leixiaohua1020\/article\/details\/50535042\">\u89c6\u97f3\u9891\u6570\u636e\u5904\u7406\u5165\u95e8\uff1aAAC\u97f3\u9891\u7801\u6d41\u89e3\u6790_\u58f0\u7801\u6d41-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/blog.csdn.net\/qq_27788177\/article\/details\/113758541\">\u3010\u7f51\u7edc\u901a\u4fe1 &#8212; \u76f4\u64ad\u3011\u97f3\u9891\u6d41\u7f16\u7801 &#8212; AAC \u57fa\u7840_\u76f4\u64ad\u6d41\u97f3\u9891\u7f16\u7801\u683c\u5f0f-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/end.gif'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"50\" data-original=\"http:\/\/www.fishq.top\/wp-content\/uploads\/2025\/03\/end.gif\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-393\"\/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>2025.7.08\ud83d\udc31 \u4e00\u3001\u6982\u8ff0 AAC\uff08Advanced Audio Coding\uff09\uff0c\u4e2d\u6587\u540d\uff1a\u9ad8\u7ea7\u97f3\u9891\u7f16\u7801\u3002\u51fa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":332,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-261","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-4"],"modified_by":"FISHQ","_links":{"self":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/comments?post=261"}],"version-history":[{"count":145,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/261\/revisions"}],"predecessor-version":[{"id":973,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/posts\/261\/revisions\/973"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/media\/332"}],"wp:attachment":[{"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/media?parent=261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/categories?post=261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fishq.top\/index.php\/wp-json\/wp\/v2\/tags?post=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}