Multipoint Video Communication System with 3D Virtual Space
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- Bethanie Hardy
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1 IETF76 SAMRG Multipoint Video Communication System with 3D Virtual Space Shuntaro Nishiura, Nobuo Kawaguchi Nagoya University / WIDE Project
2 Point of this talk. Deployment of Small llgroup Multicast. li New application area for the Scalable Adaptive Multicast Proposal : 3D Virtual Space Multi Point Video Comm. App. Implementation ti for Online conference over 1000 Dynamic selection/classification of destinations.
3 Background Small llgroup Multicast t(sgm )is one of the Desirable technology in the Internet. SmallGroup = 2~30 people XCAST6 is one of the candidates to support it. There might be several technologies which will support Small Group Multicast. So, we have developed a middleware to enable easy migration of protocols.
4 SAMTK Scalable Adaptive Multicast Toolkit Multi platform / Open Source Toolkit for Multipoint Communication (in C++ with Qt) ( Windows/ Mac/ /Li Linux / BSD) Under development since 2006 S t i f Support s easy programming for multi point communication applications.
5
6 SAMTK Group Manager
7 SAMTK Architecture SAMTK Group Web Server (Apache / PHP) SAM Applications HTTP/XML Application Interface SAMTK Core Module Protocol Interface XCAST Plugin XCAST6 Group Interface Group Management Module ALM Plugin IPv4 OS (Windows / Mac / Linux / FreeBSD.. )
8 Killer App for Multipoint Comm. We are looking for Killer App. 3D Virtual space Comm. might be the one. Demo on CCNC2009 Nat Free 3D Video Conf. ALR SAMTK Group Server ALR The Internet NAT NAT
9 Group management on 3D space SAMTK Group Server with Group Manager Currently only supports Static group management We want Dynamic change of the member throughthethe Position and Orientation of the each client. It is now not a simple Group.
10 New 3D Virtual Space App Develop a Virtual Space Server (tcp connected) Space server Dynamically form the destination members. Classify the Visible and Audible members. Virtual Server do not transfer media streams May supports 1000~ clients. Not really tested yet
11 SAMTK Architecture SAMTK Group Web Server (Apache / PHP) SAM Applications HTTP/XML Application Interface SAMTK Core Module Protocol Interface XCAST Plugin XCAST6 Group Interface Group Management Module ALM Plugin IPv4 OS (Windows / Mac / Linux / FreeBSD.. )
12 New 3D Video Comm. Architecture Virtual Space Server 3D Video Comm. Client Application Interface SAMTK Core Module Protocol Interface XCAST Plugin XCAST6 Group Interface Group Management Module ALM Plugin IPv4 OS (Windows / Mac / Linux / FreeBSD.. )
13 3D Video Comm. Architecture Virtual Space Server Send Position/Ori. Video and Audio Member List Send dclient A s Position / Oi Orientation tti Client A Client B Client C Client D Send Video and Audio
14 Classification of destinations in 3D Classification of Audio θ Classification of Video θ2 d θ1 d Distance d controls volume Orientation θ also controls volume (if θ > 180, less volume) Distance d controls frame rate. Limit the destination member by θ1 < 45 and θ2 < 90
15 Evaluation of the Current Impl. 3.6Mbps 1.2Mbps 224Kbps Current Implementation uses just Multi Unicast
16 Classifying Destinations Audio > volume / compression rate Video > > frame rate / compression rate Dst1 3 Src M Router Dt2 Dst2 1 2 Dst3 S
17 Conclusion Development of Killer App for SGM. 3D Virtual Space Video Comm. Dynamic configuration of Destinations through 3D Virtual Space positioning. Canreduce the bandwidth of media stream. By dividing Destination Control with media stream, the server can handle 1000~ clients.
18 Future Works Currently, we only control destinations, audio volume and video quality through the Position and Orientation. We need to figure out the receiver s side of bandwidth / congestion. SICC (Sender initiated Congestion Control) may SICC (Sender initiated Congestion Control) may one of the solutions.
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