1. 1 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 Adviser : Kai-wei Ke Speaker : Chia-Jui Tsai Intelligent monitoring and recording system implementation for Customized H.323-based Internet phone

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

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

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

5. About Standard H.323 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.323v6", was published in 2006 Elements of an H.323 System  Terminals  Gatekeeper  Multipoint Control Units (MCU)  Gateway 5

6. H.323 Network Structure 6

7. H.323 Protocol Stack 7

8. Standard H.323 Call Flow Chart 8

9. About Customized H.323 What is customized H.323 ?  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

10. Customized H.323 Call Flow Chart 10

11. Register flow Detail 11

12. Call flow Detail 12

13. Call flow Detail (Cont.) 13

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

15. System Environment of Network 15

16. System function block 16

17. Classification of packet 17

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

19. DEMO 19

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

21. Reference 【 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 工程研究所， 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 工程研究所， 2008 ，七月 21