H 323 Intelligent monitoring and recording system implementation

客製化H. 323協定之智慧型網路 電話監控與錄音系統之研製 Intelligent monitoring and recording system implementation for Customized H. 323 -based Internet phone Adviser : Kai-wei Ke Speaker : Chia-Jui Tsai 1

Outline n n Introduction Background Standard H. 323 ¨ Customized H. 323 ¨ n Intelligent monitoring and recording system System Environment of Network ¨ System function block ¨ Classification of packet ¨ n n DEMO Conclusion and Futures Works 2

Introduction n Vo. IP is the popular application of the Internet Therefore , requirement of the audio recording system growing day by day n Vo. IP protocol n H. 323 ¨ SIP(Session Initiation Protocol) ¨ 3

Outline n n Introduction Background Standard H. 323 ¨ Customized H. 323 ¨ n Intelligent monitoring and recording system System Environment of Network ¨ System function ¨ Classification of packet ¨ n n DEMO Conclusion and Futures Works 4

About Standard H. 323 n H. 323 is a multimedia conferencing protocol, which includes audio, video, and data conferencing over packet-switched networks The first version published by the ITU in November 1996 ¨ The current version of H. 323, commonly referred to as "H. 323 v 6", was published in 2006 ¨ n Elements of an H. 323 System ¨ Terminals ¨ Gatekeeper ¨ Multipoint Control Units (MCU) ¨ Gateway 5

H. 323 Network Structure 6

H. 323 Protocol Stack 7

Standard H. 323 Call Flow Chart 8

About Customized H. 323 n What is customized H. 323 ? ¨ n 部份的H. 323終端設備製造商為了賺取更高的利潤而藉由更改 H. 323的標準, 使他們的產品差異化, 藉此提供Standard H. 323所沒 有的額外加值服務 What different about standard and customized H. 323? Call Signal ¨ Call Flow ¨ 9

Customized H. 323 Call Flow Chart 10

Register flow Detail 11

Call flow Detail 12

Call flow Detail (Cont. ) 13

Outline n n Introduction Background Standard H. 323 ¨ Customized H. 323 ¨ n Intelligent monitoring and recording system System Environment of Network ¨ System function block ¨ Classification of packet ¨ n n DEMO Conclusion and Futures Works 14

System Environment of Network 15

System function block 16

Classification of packet 17

Outline n n Introduction Background Standard H. 323 ¨ Customized H. 323 ¨ n Intelligent monitoring and recording system System Environment of Network ¨ System function block ¨ Classification of packet ¨ ¨ DEMO n Conclusion and Futures Works 18

DEMO 19

Conclusion and Futures Works n Conclusions ¨ Custom H. 323 Signal 分析 ¨ 通話狀態追蹤 ¨ 聲音還原品質 n Futures Works ¨ 影像的錄製與還原 ¨ 聲紋辨識 20

Reference n n 【 1】Hong Liu and Petros Mouchtaris, “ Voice over IP Signaling: H. 323 and Beyond”, IEEE Communications Magazine, pp. 142 -148, October 2000 【 2】“Understanding H. 323 Gatekeepers” from Cisco, Document ID: 5244 【 3】黃威穎，“H. 323網路電話音訊監控與錄製系統之研製”，國立台北科技大學 資訊 程研究所，2008，七月 【 4】曾致皓，“H. 323網路電話視訊監控與錄製系統之研製”，國立台北科技大學 資訊 程研究所，2008，七月 21