{"id":256,"date":"2021-07-16T17:40:44","date_gmt":"2021-07-16T09:40:44","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=256"},"modified":"2021-07-16T17:40:46","modified_gmt":"2021-07-16T09:40:46","slug":"webrtc%e8%a7%86%e9%a2%91qos","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=256","title":{"rendered":"webrtc\u89c6\u9891QOS"},"content":{"rendered":"\n<p><a href=\"https:\/\/git.sysop.bigo.sg\/lizhengtang\/miscellaneous\/-\/wikis\/webrtc%E8%A7%86%E9%A2%91QOS\/edit\"><\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/blog.csdn.net\/crystalshaw\/category_9281395.html\">https:\/\/blog.csdn.net\/crystalshaw\/category_9281395.html<\/a><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e88a12e71d2\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e88a12e71d2\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=256\/#%E7%AD%96%E7%95%A5%E6%B1%87%E6%80%BB\" >\u7b56\u7565\u6c47\u603b<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=256\/#NACK\" >NACK<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=256\/#FEC\" >FEC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=256\/#%E6%8B%A5%E5%A1%9E%E6%8E%A7%E5%88%B6\" >\u62e5\u585e\u63a7\u5236<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AD%96%E7%95%A5%E6%B1%87%E6%80%BB\"><\/span>\u7b56\u7565\u6c47\u603b<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<ol class=\"wp-block-list\"><li>NACK<\/li><li>FEC<\/li><li>SVC<\/li><li>JitterBuffer<\/li><li>IDR Request<\/li><li>PACER<\/li><li>Sender Side BWE\u6216REMB\uff08Receiver Estimated Maximum Bitrate<\/li><li>\u52a8\u6001\u5e27\u7387\u8c03\u6574<\/li><li>AVSync\u97f3\u89c6\u9891\u540c\u6b65<\/li><li>\u52a8\u6001\u5206\u8fa8\u7387\u8c03\u6574\u7b56\u7565<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"NACK\"><\/span>NACK<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>\u901a\u8fc7\u68c0\u6d4b\u63a5\u6536\u5230\u7684\u5305\u5e8f\u53f7\uff0c\u82e5\u53d1\u73b0\u4e22\u5305(\u5305\u5e8f\u53f7\u8df3\u8dc3)\u5c31\u751f\u6210\u4e00\u4e2aNACK\uff0c\uff02\u51c6\u5907&#8221;\u8981\u6c42\u53d1\u9001\u7aef\u91cd\u4f20\uff1b<\/li><li>\u4e0a\u9762\u751f\u6210\u7684NACK\u4e0d\u662f\u9a6c\u4e0a\u53d1\u9001\u7684\uff0c\u800c\u662f\u9700\u8981\u6709\u4e00\u4e2adelay\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u5305\u53ef\u80fd\u53ea\u662f\u4e71\u5e8f\u4e86\uff0c\u5e76\u4e0d\u662f\u771f\u7684\u4e22\u5931\u4e86\uff0c\u5982\u679c\u5728\u5ef6\u65f6\u5185\u6536\u5230\u4e86\u8fd9\u4e2a\u5305\uff0c\u90a3\u4e48\u8fd9\u4e2aNACK\u5c31\u4e0d\u7528\u53d1\u4e86\uff1b<\/li><li>\u6709\u65f6\u4e00\u4e2a\u5305\u53ef\u80fd\u8981\u53d1\u591a\u6b21NACK\u8981\u6c42\u8fdb\u884c\u91cd\u4f20\uff0c\u4f46\u662f\u540c\u4e00\u4e2a\u5305\u7684\u591a\u6b21NACK\u53d1\u9001\u95f4\u9694\u5e94\u8be5\u5927\u4e8ertt\uff0c\u56e0\u4e3a\u4ece\u63a5\u6536\u7aef\u53d1\u9001NACK\u5230\u53d1\u9001\u7aef\u518d\u5230\u53d1\u9001\u7aef\u628a\u5305\u4f20\u8fc7\u6765\uff0c\u9700\u8981\u81f3\u5c11rtt\u7684\u5ef6\u65f6\uff1b<\/li><li>1\u4e2a\u5305\u4e0d\u4f1a\u65e0\u9650\u53d1\u9001NACK\u8fdb\u884c\u91cd\u4f20\uff0c\u800c\u662f\u6709\uff11\u4e2a\u6700\u5927\u91cd\u4f20\u6b21\u6570\uff1b<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FEC\"><\/span>FEC<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>RedFEC<br>\u4e00\u4e2a\u5305\u91cc\u9762\u5e26\u4e24\u4e2a\u5305(\u5f53\u524d\u5305\u548c\u4e0a\u4e00\u4e2a\u5305)<\/li><li>UlpFEC<br>m\u4e2a\u539f\u59cb\u6570\u636e\u5305\u901a\u8fc7\u5f02\u6216\u751f\u6210n\u4e2a\u5197\u4f59\u5305\uff0c\u4efb\u610f\u4e22\u5931n\u4e2a\u5305\u90fd\u53ef\u4ee5\u901a\u8fc7\u5269\u4f59\u7684\u5305\u628a\u8fd9\u4e00\u7ec4\u5305\u5168\u90e8\u6062\u590d\u51fa\u6765<\/li><li>FlexFEC<br>\u5f15\u5165\u4e86\u4ea4\u7ec7\u7b97\u6cd5\uff0c\u5f02\u6216\u7684\u65b9\u5f0f\u66f4\u52a0\u7075\u6d3b(\u53ef\u4ee5\u6309\u884c,\u6309\u5217\u4e4b\u7c7b\u7684\u65b9\u5f0f\u8fdb\u884c\u5f02\u6216)\uff1b<\/li><li>Reed Solomon\u7b97\u6cd5<\/li><\/ol>\n\n\n\n<p>FEC\u5197\u4f59\u5ea6\u914d\u7f6e\uff1a\u901a\u8fc7\u9884\u6d4b\u4e22\u5305\u7387\u6765\u914d\u7f6eFEC\u5197\u4f59\u5ea6\uff0e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%8B%A5%E5%A1%9E%E6%8E%A7%E5%88%B6\"><\/span>\u62e5\u585e\u63a7\u5236<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u3000<\/th><th>GCC<\/th><th>Sendside-BWE<\/th><\/tr><\/thead><tbody><tr><td>\u7801\u63a7\u8ba1\u7b97\u6a21\u5757<\/td><td>\u63a5\u6536\u7aef<\/td><td>\u53d1\u9001\u7aef<\/td><\/tr><tr><td>RTP\u5934\u90e8\u6269\u5c55<\/td><td>AbsSendTime<\/td><td>TransportSequenceNumber<\/td><\/tr><tr><td>\u63a5\u6536\u7aef\u5173\u952e\u5bf9\u8c61<\/td><td>RemoteBitrateEstimatorAbsSendTime<\/td><td>RemoteEstimatorProxy<\/td><\/tr><tr><td>\u7f51\u7edc\u5ef6\u65f6\u6ee4\u6ce2\u5668<\/td><td>Kalman Filter<\/td><td>Trendline Filter<\/td><\/tr><tr><td>\u63a5\u6536\u7aef\u53cd\u9988RTCP\u62a5\u6587<\/td><td>REMB<\/td><td>TransportCC<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/blog.csdn.net\/crystalshaw\/category_9281395.html \u7b56\u7565\u6c47\u603b NACK FEC SVC JitterBuffer IDR Request P&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[28],"class_list":["post-256","post","type-post","status-publish","format-standard","hentry","category-10","tag-28"],"_links":{"self":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=256"}],"version-history":[{"count":1,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/256\/revisions"}],"predecessor-version":[{"id":257,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/256\/revisions\/257"}],"wp:attachment":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}