The document describes a multimedia conferencing system called MCS 3.0. It allows for video conferencing over a network between PCs. The system uses a client-server architecture with clients connecting to conference servers. Media links and interchanges are used to route audio and video packets between local area networks. The system supports various video and audio codecs and compression standards to optimize quality and file size. It can be used to enable intercommunication between offices, classrooms, and government agencies over an ATM backbone network.

1. Multimedia Conferencing System Introduction to MCS 3.0 Pure multitasking conferencing system Video conference made possible from Window based PC emulates regular conference in meeting rooms user-friendly and client-server based fully integrated network based conferencing system

2. Multimedia Conferencing System MCS 3.0 architecture : WAN client client client client client client MLIC MLIC server server router router

3. Multimedia Conferencing System The entities of MCS are : The Client entity The Conference Server entity The MLIC entity The Compression entity

4. Multimedia Conferencing System The Client entity performs : Multimedia captures Multimedia playback Data packetization & reconstruction Communication to server to maintain the RSW control criteria.

5. Multimedia Conferencing System Video & Audio modules : Dimension 160 x 120 Image Type 8 bit palletized (256 colors) Protocol UDP (Broadcast Packets) Audio type Wave format Protocol UDP (Broadcast Packets)

6. Multimedia Conferencing System The MLIC entity MLIC in active site LAN will : Listen to specified ports for Audio/Video packets Change to Audio/Video UDP unicast and transmit out. MLIC in the destination LAN does: Data packetization & reconstruction Communication to server to maintain the RSW control criteria.

7. Multimedia Conferencing System The MLIC in MCS architecture : MLIC MLIC server server LAN 1 LAN 2 router client client client client client client

8. Multimedia Conferencing System The Server entity Control the conferencing using the RSW control criteria chosen To allow users to login into the system To reflect the document conferencing TCP/IP packets to all participants. Establish inter-server links (during multi server conferences).

9. Multimedia Conferencing System The Multi-Server communication : WAN server server server server

10. Multimedia Conferencing System Data Compression (DC) entity Detect Audio/Video UDP unicast at the MLIC interface. Compress Audio/Video data and transmit via router interface. Receive compressed Audio/Video UDP unicast from router interface. Uncompress Audio/Video data and transmit via LAN interface. All other miscellaneous network packets arriving at both interfaces are transparently forwarded to the opposite interface

11. Multimedia Conferencing System The DC provides : Implementation of any types of compression algorithm : H.261 H.320 MJPEG YUV411

12. Multimedia Conferencing System Comparison (Quality vs. Size) Quality Factor : 10 File Size : 1.34KB Quality Factor : 75 File Size : 3.86KB Quality Factor :5 File Size : 1.10KB Quality Factor : 25 File Size : 1.89KB Original Image File size : 19.1KB Quality Factor : 99 File Size : 16.8KB

13. Multimedia Conferencing System The Next Generation : MCS 4.0 full duplex Audio/Video Uses Internet Real-time streaming standards Data transmission in Real-time Transfer protocol Data transmitted in IGMP multicast packets Real-time conference updates Dynamic color correction

14. Multimedia Conferencing System Intercommunication between Offices in Penang, KL

15. Multimedia Conferencing System Intercommunication between Classrooms in School/College

16. Multimedia Conferencing System Intercommunication between Government Agencies

17. Multimedia Conferencing System ATM BACKBONE Par 1 Par 2 Par 3 Par 4 Government Agencies Corporate Sector R&D Department