voip(voice over ip,\u7db2\u969b\u7db2\u8def\u96fb\u8a71)
\u6bd4\u50b3\u7d71\u96fb\u8a71\u66f4\u7701
\u6280\u8853:\u8072\u97f3\u9023\u7e8c\u63a1\u6a23>\u8f49\u70ba\u6578\u4f4d\u683c\u5f0f>\u88dd\u5165\u5c01\u5305\u9001\u51fa>\u6536\u5230\u8cc7\u6599\u8f49\u70ba\u8a9e\u97f3\u8a0a\u865f>\u64ad\u653e
\u9700\u76f8\u5bb9\u65bcPSTN(public switched telephone network,\u516c\u773e\u4ea4\u63db\u96fb\u8a71\u7db2\u8def)\u53ef\u64adip\u96fb\u8a71\u4e5f\u53ef\u64ad\u5230\u5be6\u9ad4\u96fb\u8a71
\u9700\u63d0\u4f9b\u76f8\u540c\u65bc\u76ee\u524d\u7528\u6236\u7aef\u4ea4\u63db\u6a5fpbx(privae branch exchange)\u7684\u670d\u52d9
VoIP\u4f7f\u7528\u6642\uff0c\u6536\u767c\u96d9\u65b9\u9808\u9023\u4e0aInternet\u7dda\u8def\uff0c\u4e14\u9808\u6709\u56fa\u5b9aIP\uff0c\u96d9\u65b9\u7684\u8a2d\u5099\u65bc\u662f\u900f\u904eIP\u4f86\u50b3\u8f38\u5169\u8005\u4e4b\u9593\u7684\u8cc7\u6599
IP\u7684\u53d6\u5f97\u70ba\u5229\u7528VoIP\u8a2d\u5099\u7684\u5148\u6c7a\u689d\u4ef6\u3002\u82e5\u7121\u6cd5\u53d6\u5f97\u96d9\u65b9\u7684IP\u6642\uff0c\u5247\u7121\u6cd5\u9806\u5229\u901a\u8a0a
\u884d\u751f\u7684\u52a0\u503c\u670d\u52d9\u5982Web-Dial(\u7db2\u9801\u71b1\u7dda)\u3001Web-based Call Center(\u7db2\u9801\u5ba2\u670d)\u3001Internet Call Waiting(\u7db2\u8def\u63d2\u63a5)\u7b49
\u9700\u8981\u4f7f\u7528\u96fb\u529b\u7cfb\u7d71
\u8a9e\u97f3\u54c1\u8cea\u554f\u984c\uff0c\u6bd4\u65b9\u56de\u97f3\u6216\u300c\u91cd\u8907\u8aaa\u597d\u591a\u6b21\u300d\u7684\u554f\u984c\uff0c\u9019\u662f\u4e00\u7a2e\u300c\u534a\u96d9\u5de5\u6548\u61c9\u300d
\u53ef\u80fd\u6703\u53d7\u516c\u53f8\u5167\u90e8\u7db2\u8def\u4e0a\u5176\u4ed6\u4ea4\u901a\u5f71\u97ff\uff0cex\u7db2\u8def\u53d7\u5230DoS\u963b\u65b7\u670d\u52d9\u7684\u653b\u64ca\uff0c\u786c\u9ad4\u6545\u969c\u800c\u7671\u7613
ps:
VoIP Service Provider(\u7db2\u8def\u96fb\u8a71\u670d\u52d9\u4f9b\u61c9\u5546)\u6709\u6642\u4e5f\u7a31\u70baITSP(Internet Telephony Services Provider)<\/p>\n\n\n\n
\u91dd\u5c0dQoS\u7684\u505a\u6cd5
RSVP(\u8cc7\u6e90\u9810\u7559\u901a\u8a0a\u5354\u5b9a)
Automatic Call Rerouting(\u901a\u8a71\u81ea\u52d5\u91cd\u65b0\u7e5e\u9053)
End-to- End ATM(\u9ede\u5c0d\u9ede\u975e\u540c\u6b65\u50b3\u8f38\u6a21\u5f0f)
Flow Isolatio(\u6d41\u91cf\u9694\u96e2)\u4f86\u6539\u5584\u5ef6\u9072\u554f\u984c<\/p>\n\n\n\n
\u5f71\u97ffvoip\u54c1\u8cea\u7684\u539f\u56e0
delay(\u5ef6\u9072),\u61c9\u5c0f\u65bc150ms
packet loss(\u5c01\u5305\u4e1f\u5931),\u61c9\u5c0f\u65bc1%
Jitter(\u8a9e\u97f3\u6296\u52d5)
ps:\u4ee5\u4e0a3\u9ede\u8d8a\u4f4e\u8d8a\u597d
ps:voip packet\u5927\u7d04\u572860bytes-120bytes\u4e4b\u9593<\/p>\n\n\n\n
SS7(signaling system7,\u7b2c\u4e03\u865f\u4fe1\u4ee4\u7cfb\u7d71)
\u50b3\u7d71\u96fb\u8a71\u7cfb\u7d71\u7528\u4f86\u8655\u7406\u9019\u4e9b\u901a\u8a71\u7ba1\u7406\u7684\u6a5f\u5236,\u5354\u5b9a\u9700\u652f\u63f4\u624d\u80fd\u4e92\u901a
MTP(Message Transfer Part,\u8a0a\u606f\u8f49\u9001\u90e8)
\u30001\u5c64,Signalling Data Link Level(\u4fe1\u865f\u6578\u64da\u93c8\u8def\u5c64):\u53c8\u7a31\u5be6\u9ad4\u5c64,\u5b9a\u7fa9\u4fe1\u865f\u93c8\u8def\u4e4b\u5be6\u9ad4\u3001\u96fb\u6c23\u8207\u529f\u80fd\u7279\u6027,\u4ee5\u63d0\u4f9b\u5be6\u9ad4\u93c8\u8def\u6536\u9001SS7\u4fe1\u865f
\u30002\u5c64,Signalling Link Level(\u4fe1\u865f\u93c8\u8def\u5c64):\u8ca0\u8cac\u78ba\u4fddSS7\u4fe1\u865f\u8a0a\u606f\u5728\u5be6\u9ad4\u5c64\u4e0a\u6536\u9001\u7684\u53ef\u9760\u5ea6
\u30003\u5c64,Signalling Network Level(\u4fe1\u865f\u7db2\u8def\u5c64):\u4e3b\u8981\u529f\u80fd\u70ba\u4fe1\u865f\u8a0a\u606f\u8655\u5206\u53ca\u4fe1\u865f\u7db2\u8def\u7ba1\u7406
\u30003.5\u5c64SCCP(Signalling Connection Control Part,\u4fe1\u865f\u63a5\u7e8c\u63a7\u5236\u90e8),\u4fc2\u5354\u52a9ISUP\u505a\u7aef\u5c0d\u7aef\u4e4b\u4ea4\u63db\uff0c\u4e3b\u8981\u76ee\u7684\u6709\u56db\u9805\uff1a
\u3000\u3000\u4e00.\u4f9bISDN-UP(ISUP)\u5efa\u7acb\u7aef\u5c0d\u7aef\u7684Signalling Connection(\u4fe1\u865f\u63a5\u7e8c)
\u3000\u3000\u4e8c.\u4f9b\u7db2\u7ba1\u3001\u7dad\u8b77\u4e2d\u5fc3\u8207\u5404\u4ea4\u63db\u5c40\u9593(\u6709SP\u529f\u80fd\u8005)\u5efa\u7acb\u4fe1\u865f\u63a5\u7e8c\u3002
\u3000\u3000\u4e09.\u4f9b\u5c07\u4f86User\u7528\u6236(\u5982\u5e33\u52d9\u4e2d\u5fc3)\u8207\u5404\u4ea4\u63db\u5c40(SP\u9ede)\u9593\u5efa\u7acb\u4fe1\u865f\u63a5\u7e8c\uff0c\u53ef\u76f4\u63a5\u50b3\u9001\u5e33\u52d9\u8cc7\u6599\uff0c\u800c\u4e0d\u7528\u518d\u904b\u9001\u78c1\u5e36\u3002
\u3000\u3000\u56db.\u4f9b\u5c07\u4f86\u5176\u4ed6User Part(\u7528\u6236\u90e8)\u5efa\u7acb\u4fe1\u865f\u63a5\u7e8c\u4f7f\u7528\u3002
\u30004\u5c64,\u7528\u6236\u90e8,\u4e3b\u8981\u4e4b\u529f\u80fd\u5728\u65bc\u8a02\u5b9a\u8a0a\u606f\u4e4b\u7a2e\u985e\u3001\u683c\u5f0f\u3001\u547c\u53eb\u7a0b\u5e8f\u53ca\u8a0a\u606f\u6d41\u7a0b\u63a7\u5236
TUP(\u96fb\u8a71\u7528\u6236\u90e8)
ISUP(\u6574\u9ad4\u670d\u52d9\u6578\u4f4d\u7db2\u8def\u7528\u6236\u90e8)
TCAP(\u4ea4\u6613\u80fd\u529b\u61c9\u7528\u90e8),\u7528\u65bc\u4ea4\u63db\u667a\u6167\u7db2\u8def\u5167\u7684\u8cc7\u8a0a\uff0c\u5982\u67e5\u8a62\u8cc7\u6599\u5eab\u5167\u7684\u8981\u6c42\u53ca\u53cd\u61c9
MAP(\u884c\u52d5\u96fb\u8a71\u61c9\u7528\u90e8)
OMAP(\u71df\u904b\u7dad\u8b77\u7ba1\u7406\u90e8)
DUP(\u6578\u4f4d\u7528\u6236\u90e8)<\/p>\n\n\n\n
…………………….
\u73fe\u6709voip\u6280\u8853\u6709:
VoIPprotocol\uff1aMEGACO\/H.248
Peer-to-Peer Protocol:H.323\u3001SIP
Master-slave Protocol:MGCP<\/p>\n\n\n\n
ITU,IETF\u4e3b\u5c0e\u7684megaco\u6982\u5ff5<\/strong> IETF\u4e3b\u5c0e\u7684sip\u7684\u6982\u5ff5,<\/strong>\u7d44\u6210\u4fe1\u4ee4\u7cfb\u7d71\u7684\u4e3b\u8981\u5143\u4ef6 ITU\u4e3b\u5c0e\u7684H.323\u7684\u6982\u5ff5<\/strong> ISC(international softswitch consortium,\u570b\u969b\u7db2\u969b\u7db2\u8def\u96fb\u4fe1\u4ea4\u63db\u5354\u6703)\u7684\u6982\u5ff5 ITU,IETF\u76f8\u540c\u90e8\u4efd ………….. voip(voice over ip,\u7db2\u969b\u7db2\u8def\u96fb\u8a71)\u6bd4\u50b3\u7d71\u96fb …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[29],"tags":[],"class_list":["post-849","post","type-post","status-publish","format-standard","hentry","category-osi-layer7"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=849"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/849\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
ip\u96fb\u8a71\uff1e\u7db2\u8def\uff1emac>\u7db2\u8def\uff1eip\u96fb\u8a71
ip\u96fb\u8a71\uff1e\u7db2\u8def\uff1emac>pstn\uff1e\u50b3\u7d71\u96fb\u8a71
ip\u96fb\u8a71\uff1a\u50b3\u7d71\u6216\u8edf\u9ad4\u90fd\u4e0d\u9650
media gateway controller(\u5a92\u9ad4\u9598\u9053\u63a7\u5236\u5668):\u8ca0\u8cac\u4ee5\u4e0b\u5169\u500b\u5354\u8abf\u5de5\u4f5c
media gateway(\u5a92\u9ad4\u9598\u9053\u5668):ip\u7db2\u8def\u548cpstn(\u6216\u4e0d\u540c\u7de8\u78bc\u6280\u8853\u7684\u5169\u7db2\u8def)\u7684\u8cc7\u6599\u8f49\u63db
signaling gateway(\u4fe1\u4ee4\u9598\u9053\u5668):\u63d0\u4f9b\u63a7\u5236\u4fe1\u4ee4\u8f49\u63db\u5de5\u4f5c\uff0c\u4f8b\u5982\u5c07\u63a5\u53d7\u64a5\u865f\u8981\u6c42\u7684\u8a0a\u865f\u8f49\u6210\u53e6\u4e00\u908a\u683c\u5f0f<\/p>\n\n\n\n
user agent(\u4f7f\u7528\u8005\u4ee3\u7406\u7a0b\u5f0f)<\/strong>\uff1a\u8ca0\u8cac\u64a5\u548c\u639b\u96fb\u8a71\u7684\u8a2d\u5099
\u3000user agent client(\u5ba2\u6236\u7aef)\uff1a\u8655\u7406\u64a5\u96fb\u8a71
\u3000user agent server(\u4f3a\u670d\u7aef)\uff1a\u8655\u7406\u63a5\u96fb\u8a71
location server(\u5b9a\u4f4d\u4f3a\u670d\u5668)<\/strong>:\u8ca0\u8cac\u7528\u6236\u7684\u8cc7\u8a0a,\u96fb\u8a71\u7c3fip\u4f4d\u5740,\u670d\u52d9,\u6700\u611b\u7b49\u8cc7\u6599\u5eab
proxy server(\u4ee3\u7406\u4f3a\u670d\u5668)<\/strong>:\u53ef\u5c07user agent\u8981\u6c42\u8f49\u9001\u5230\u53e6\u4e00\u500b\u4f4d\u7f6e,\u540c\u6642\u8ca0\u8cac\u8655\u7406\u8def\u7531\u6700\u4f73\u5316\u5de5\u4f5c\u548c\u898f\u7bc4\u50b3\u8f38\u7684\u7b56\u7565
redirect server(\u8f49\u63a5\u4f3a\u670d\u5668)<\/strong>:\u63a5\u6536user agent\u7684\u8981\u6c42\u5f8c\u6703\u56de\u50b3\u53e6\u4e00\u500b\u53d7\u8a71\u4f4d\u7f6e\u7d66user agent\u5efa\u7acb\u901a\u8a71,\u5982\u4f86\u96fb\u8f49\u63a5,080
registrar server(\u8a3b\u518a\u4f3a\u670d\u5668)<\/strong>:\u8ca0\u8cac\u8a3b\u518a\u8981\u6c42\u548c\u66f4\u65b0\u8cc7\u6599\u5eab\u88e1\u5b9a\u4f4d\u4f3a\u670d\u5668\u88e1\u6703\u4f7f\u7528\u5230\u7684\u76f8\u95dc\u8cc7\u6599<\/p>\n\n\n\n
terminal(\u7d42\u7aef\u8a2d\u5099)<\/strong>:ip\u96fb\u8a71,\u53ef\u542b\u5f71\u50cf\u548c\u8cc7\u6599\u50b3\u8f38\u529f\u80fd
gatekeeper<\/strong>(\u9598\u9053\u7ba1\u7406\u5668)<\/strong>:\u9078\u64c7\u6027\u914d\u5099,\u63d0\u4f9b\u4f4d\u7f6e\u548c\u4fe1\u4ee4\u7684\u8655\u7406\u529f\u80fd,\u983b\u5bec\u63a7\u5236,\u4e26\u548c\u9598\u9053\u5668\u904b\u4f5c\u4f86\u63d0\u4f9bPSTN\u7684\u9023\u7d50
\u3000\u626e\u6f14\u7ba1\u7406\u8005\u89d2\u8272,\u5404\u500b\u7d42\u7aef\u7684IP\u8a8d\u8b49\u53caAlias address(\u5316\u540d)\u8f49\u63db\u3001\u4fe1\u4ee4\u7684\u8f49\u63a5\u7b49
\u3000\u7528RAS\u6240\u5b9a\u7fa9\u7684Registration Messages(\u8a3b\u518a\u8a0a\u606f)\u53caTranslation Table(\u8f49\u63db\u8868)\uff0c\u8f49\u63db\u5225\u540d\u4f4d\u5740\u548c\u50b3\u8f38\u4f4d\u5740
\u3000\u7528ARQ,ACF,ARJ\u6c7a\u5b9a\u662f\u5426\u5141\u8a31\u52a0\u5165\u7cfb\u7d71\u7684\u5b58\u53d6(admission control\u8a31\u53ef\u63a7\u5236)
\u3000\u7528BRQ,BCF,BRJ\u9032\u884cbandwidth control(\u983b\u5bec\u63a7\u5236)
gateway(\u9598\u9053\u5668)<\/strong>:ip\u96fb\u8a71\u7cfb\u7d71\u548cpstn\u7684\u9023\u7d50,\u8655\u7406\u4e4b\u9593\u7684\u4fe1\u4ee4\u8207\u5a92\u9ad4\u8a0a\u865f\u7684\u8f49\u63db,\u8ca0\u8cac\u6578\u4f4d\u5f71\u97f3\u8cc7\u6599\u7684Codec(\u7de8\u89e3\u78bc),\u4e0d\u540c\u50b3\u8f38\u5354\u5b9a\u7684\u8f49\u63db
MCU(multipoint control unit,<\/strong>\u591a\u9ede\u63a7\u5236\u55ae\u5143)<\/strong>\uff1a\u63d0\u4f9b\u5982\u591a\u65b9\u901a\u8a71\u670d\u52d9\u7684\u670d\u52d9,\u5354\u8abf\u53ca\u63a7\u5236\u591a\u500b\u7d42\u7aef\u9593\u7684\u8996\u8a0a\u50b3\u8f38
\u3000MC(Multipoint Controller):\u5fc5\u5099,\u8ca0\u8cac\u5354\u8abf\u7d42\u7aef\u9593\u50b3\u8f38\u983b\u9053\u4f7f\u7528\u7684\u5148\u5f8c\u9806\u5e8f\u53ca\u5229\u7528H.245\u4f86\u754c\u5b9a\u50b3\u8f38\u5167\u5bb9\u7684\u898f\u683c
\u3000MP(Multipoint Processor):\u5728MC\u7684\u63a7\u5236\u898f\u5247\u4e0b\u5f9e\u4e8b\u5f71\u97f3\u7684mixing(\u518d\u88fd\u4f5c)\u3001Switch(\u8f49\u9001)\u4ee5\u53ca\u4e00\u4e9b\u8996\u8a0a\u6d41\u7684\u8655\u7406<\/p>\n\n\n\n
\u56e0ITU\u53caIETF\u5236\u5b9a\u51fa\u8a31\u591a\u7a2e\u4e0d\u540c\u7248\u672c\u7684\u6982\u5ff5,\u6240\u4ee5\u901a\u8a0a\u8a2d\u5099\u5927\u5ee0\u53e6\u7d44\u7e54\u4e00\u500bISC
\u4f86\u63a8\u528d\u4e00\u500b\u6574\u5408\u6240\u6709ip\u96fb\u8a71\u6280\u8853\u7684\u7d71\u4e00\u67b6\u69cb<\/p>\n\n\n\n
\u90fd\u5728\u7b2c\u4e94\u5c64
\u8072\u97f3\u7de8\u78bc\u6280\u8853\u63a1PCM
\u8072\u97f3\u50b3\u8f38\u6280\u8853\u63a1RTP(real-time transport protocol,\u5373\u6642\u9ede\u5c0d\u9ede\u7684\u50b3\u8f38\u901a\u8a0a\u5354\u5b9a)
\u5404rtp\u8a0a\u606f\u5c01\u88dd\u5728udp\u8cc7\u6599\u5305\u4e2d,\u5728\u5c01\u88dd\u65bcip\u8cc7\u6599\u5305\u4e2d\u4f86\u50b3\u8f38
\u56e0\u7db2\u8def\u96fb\u8a71\u662f\u96d9\u5411,\u6240\u4ee5\u9700\u540c\u6642\u626e\u6f14rtp\u767c\u8a71\u7aef\u53cartp\u6536\u8a71\u7aef<\/p>\n\n\n\n
MOS(mean opinion score,\u5e73\u5747\u610f\u898b\u6307\u6a19)
\u8861\u91cf\u6e05\u6670\u5ea6\u7528,\u5c07\u6536\u8a0a\u7684\u8a9e\u97f3\u6a23\u672c\uff0c\u7531\u4e00\u7fa4\u6536\u8a0a\u8005\u4f9d\u6536\u807d\u5230\u7684\u901a\u8a71\u54c1\u8cea\u5206\u62105\u7b49\uff1a1\u6700\u5dee\u30015\u6700\u4f73\uff0c4\u662f\u4e00\u822c\u516c\u773e\u96fb\u8a71\u7db2\u8def\u7cfb\u7d71\u7684\u901a\u8a71\u54c1\u8cea\u3002\u7531\u65bcMOS\u5f88\u96e3\u5efa\u7acb\u4e00\u500b\u5ba2\u89c0\u6a19\u6e96\uff0c\u4e14\u6709\u5be6\u969b\u57f7\u884c\u4e0a\u7684\u56f0\u96e3\uff0c\u56e0\u6b64MOS\u7121\u6cd5\u4f5c\u70ba\u9577\u671f\u8a55\u4f30\u7684\u6a19\u6e96
PSQM,PAMS
\u4f7f\u7528natural speech(\u81ea\u7136\u8a9e\u97f3)\u6216\u985e\u8a9e\u97f3\u6a23\u672c\u4f5c\u70ba\u8f38\u5165\u8a0a\u865f\uff0c\u901a\u5e38\u9078\u64c7\u7684speech sample(\u8a9e\u97f3\u6a23\u672c)\u6703\u7d93\u7531\u8a9e\u97f3\u50b3\u8f38\u8def\u7d93\u50b3\u9001\uff0c\u8a9e\u97f3\u50b3\u8f38\u8def\u7d93\u5728\u7d93\u904e\u7de8\u78bc\u3001packetization(\u5c01\u5305\u5316)\u3001\u50b3\u8f38\u548c\u89e3\u78bc\u7684\u904e\u7a0b\u4e2d\uff0c\u6703\u9020\u6210\u5404\u7a2e\u4e0d\u540c\u7a0b\u5ea6\u7684\u8a0a\u865f\u640d\u5931\u3002
PSQM(Perceptual Speech Quality Measurement)
\u7531\u8377\u862dKPN Research\u6240\u767c\u5c55,\u73fe\u5df2\u6210\u7121ITU-T P.861\u6a19\u6e96
\u4ee50\u52306.5\u7684\u6578\u5b57\u4f86\u8a55\u91cf\u6e05\u6670\u5ea6\uff0c\u6578\u5b57\u8d8a\u4f4e\u4ee3\u8868\u901a\u8a71\u54c1\u8cea\u8d8a\u597d,\u539f\u672c\u662f\u8a2d\u8a08\u7528\u4f86\u8a55\u4f30\u548c\u6bd4\u8f03\u5404\u7a2e\u8a9e\u97f3\u7de8\u78bc(speech codecs)\u6280\u8853\u7684\u512a\u52a3\uff0c\u800c\u975eend-to-end(\u9ede\u5c0d\u9ede)\u7684\u7db2\u8def\u901a\u8a71\u54c1\u8cea\u3002\u4f46\u662f\uff0c\u52a0\u5f37\u8a31\u591a\u529f\u80fd\u4e4b\u5f8c(\u7a31\u70baPSQM+)\u4fbf\u53ef\u7528\u4f86\u4f5c\u70ba\u7db2\u8def\u901a\u8a71\u54c1\u8cea\u6e2c\u8a66
PAMS(Perceptual Analysis\/Measurement System)
\u7531\u5927\u82f1\u570b\u5354\u7684\u82f1\u570b\u96fb\u8a0a\u6240\u767c\u5c55
\u7522\u751fYlq(listening quality score,\u807d\u97f3\u54c1\u8cea\u6307\u6a19)\u548cYle(listening effort,\u807d\u97f3\u6548\u61c9\u6307\u6a19)\u5169\u7a2e\u6307\u6a19\uff0c\u5b83\u5011\u90fd\u662f\u75310~15\u7de8\u6392\uff0c\u6578\u5b57\u8d8a\u9ad8\u4ee3\u8868\u54c1\u8cea\u8d8a\u597d
PESQ(Perceptual Evaluation of Speech quality)
PSQM\u548cPAMS\u7684\u958b\u767c\u8005KPN Research\u8207\u82f1\u570b\u96fb\u8a0a\u6700\u8fd1\u5171\u540c\u5408\u4f5c\u63d0\u51fa\u65b0\u7684\u5ba2\u89c0\u8a9e\u97f3\u54c1\u8cea\u8a55\u91cfITU-T\u6a19\u6e96
\u7d50\u5408PSQM\u548cPAMS\u5169\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede-PSQM\u7684perceptual model(\u807d\u89ba\u6a21\u578b)\u548cPAMS\u7684time-alignment routine(\u6642\u9593\u5c0d\u4f4d\u6cd5)\uff0c\u6240\u4ee5PESQ\u6307\u6a19\u8207MOS\u6307\u6a19\u4e4b\u9593\u7684\u76f8\u95dc\u6027\u5c07\u66f4\u9ad8<\/p>\n","protected":false},"excerpt":{"rendered":"