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Design and implementation of IPv6 multicast based High-quality Videoconference Tool (HVCT)

Design and implementation of IPv6 multicast based High-quality Videoconference Tool (HVCT). 2003. 8. 28 Tae-wan You, Seoul National University, Korea. Outline. HVCT and Features Software design Implementation Details Experimental result Future work. HVCT & Feature. HVCT.

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Design and implementation of IPv6 multicast based High-quality Videoconference Tool (HVCT)

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  1. Design and implementation of IPv6 multicast based High-quality Videoconference Tool (HVCT) 2003. 8. 28 Tae-wan You, Seoul National University, Korea

  2. Outline • HVCT and Features • Software design • Implementation Details • Experimental result • Future work

  3. HVCT & Feature

  4. HVCT • a High-quality Video Conferencing Tool • Works on Windows 2000, SP 1 with IPv6 stack • Microsoft DirectX 8.0 or Higher • Video data be en/decoded using MPEG-4 Codec • Video : 320x240 pixels, 15fps • Audio data be en/decoded using MP3 Codec • Audio : 44kHz, 16bit, 2 channel

  5. Feature (1/2) • IPv6 capability • Working on MSR and MSDN IPv6 stack • Multicast • Efficient use of network resources via multicast • Support • High-quality multimedia data using MPEG4 codec and MP3 codec • Show a statistics that be measured traffic • Can chat using multicast

  6. Feature (2/2) • Main dialog of HVCT • Show screen of participants • Traffic monitoring • total number of bytes received • packets lost • packets misordered • represent a bandwidth using graph • Chat with participants by multicast protocol

  7. Software Design

  8. MPEG4 Video Software Encoder MPEG4 Video Software Decoder A/V MUX RTP over UDP/IPv6 Network Manager MP3 Audio Software Encoder MP3 Audio Software Decoder Encoding Manager Decoding Manager Software Components A/V DEMUX

  9. Software Components • Encoding Manager • Make an one stream with video data, which be encoded using MPEG4 codec and audio data, which be encoded using MP3 codec. • Network Manager • Add RTP header with stream and send it as udp packet to multicast address for IPv6 • After receive a packet, remove RTP header and pass data to DM (Decoding Manager) • Decoding Manager • decode the each of the stream and play both audio and video using Render filter

  10. Software Architecture User Interface DirectShow Filter (Capture) DirectShow Filter (Display1) DirectShow Filter (Display2) DirectShow Filter (Display3) RTP/RTCP & Buffer SocketThread (for send data) SocketThread2 (for receive data) Control Message Data Stream

  11. Implementation Details Multimedia Data Transfer

  12. Sender Component Capture Driver MPEG4 Encoder Video Tee MPEG4 Decoder Video Renderer Sound Driver MP3 Encoder Audio Tee MP3 Decoder Sound Driver Audio/Video MUX Video Stream RTP/RTCP Audio Stream A/V Muxed Stream UDP/IPv6 IPv6 Multicast Network

  13. Receiver Component Video Source MPEG4 Decoder Video Renderer Audio Source MP3 Decoder Sound Driver Audio/Video MUX Video Stream RTP/RTCP Audio Stream A/V Muxed Stream UDP/IPv6 IPv6 Multicast Network

  14. Implementation Details RTP/RTCP Data Transfer

  15. RTP, RTCP Library • The library be implemented on the basis of RFC 1889 • Define data type by structure in C++ • RTP, RTCP, RR, SR, SDES etc. • Made functions that can achieve accomplishments that is supported by RTP, RTCP using defined data types

  16. MySSRC Rtp socket Rtcp socket … Participant db SetRtpSdes … Create db SendRtpCtrl Create Session SendRtpData IPv6 Router APAN-SNU 138-317 OnRecvRtp UpdateRtp SendRtpBye IPv6 Host KOREN SEOUL AP done Multicast data/ctrl InitRtp

  17. Participant 2 Participant 1 ff0e::1:2:3 / 5002 Join Session RTCP (RR,SDES) RTCP (RR,SDES) RTCP Interval of Participant1 Start Send Data RTP (MPEG, MP3 payload) RTCP (SR,SDES) RTCP (RR,SDES) RTP (MPEG, MP3 payload) Join Session & Start Talk Start Playing / Participant 1 := Active Source

  18. Experimental result & Future work

  19. Experiment environment ATM S/W ETRI ATM S/W Daejeon AP ATM S/W Seoul AP ATM S/W SNU AP ATM S/W PC Router 1 PC Router 2 Host 1 Host 2 Subnet A (ETRI) Subnet B (SNU)

  20. Result – bandwidth • Video by MPEG-4 Codec • Input data : 15 frame per second, I420 format • Output data : 350 ~ 400Kbps • Audio by MP3 Codec • sample 16bit, two stereo, sampling rate 44.1kHz • 16 * 141000 * 2 =~ 1.3 Mbps • Output data : 56 kbps

  21. Bandwidth compare with vic • UCL’s vic • H.261, 10fps RGB24 format • HVCT • MPEG4, 15fps I420 format

  22. Result – delay (1/2) • Video Delay

  23. Result – delay (2/2) • Audio Delay

  24. Future Work • Reduce end-to-end delay • Experiments with other conferencing tool • VIC from UCL, ISABEL from Agora Systems etc. • Performance Test • You can get more information from http://mmlab.snu.ac.kr/~hvic

  25. Thank You !! &Any Questions ?

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