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- 1. Scalable Service Oriented Architecture for Audio/Video Conferencing By Ahmet Uyar Wednesday, March 23, 2005
- 8. H.323 Centralized Multipoint Conferencing H.323 Decentralized Multipoint Conferencing H.323 MCU cascading architecture
- 23. Single Audio Meeting Tests I 100 1.2 2275 2290 2260 1600 0.25 0.44 17.8 32.3 3.3 1500 0 0.26 13.5 26.5 0.5 1400 0 0.22 11.6 22.6 0.5 1200 0 0.18 8 15.5 0.5 800 0 0.21 4.2 7.9 0.5 400 0 0.18 2.3 4.1 0.5 200 0 0.15 1.4 2.3 0.5 100 0 0.18 0.6 0.7 0.5 12 LA(av) (%) J(av) (ms) L(av) (ms) L(N) (ms) L(1) (ms) Number Of Clients
- 26. Single Video Meeting Tests I 99 27.8 1609 1619 1599 1000 40.8 23.8 102.7 111.7 93.7 900 17.6 21.3 53.6 61.6 45.6 800 8.4 18.1 36.8 43.7 29.8 700 5.1 15.5 28.6 34.5 22.6 600 3.0 13.2 23.4 28.5 18.2 500 0.75 10.1 17.3 21.2 13.4 400 0 7.8 13.2 16.2 10.2 300 0 4.7 8.3 10.2 6.3 200 0 2 4 5 3.1 100 0 0.44 1.2 1.3 1 12 LA(N) (%) J(av) (ms) L(av) (ms) L(N) (ms) L(1) (ms) Number Of Clients
- 30. Multiple Video Meeting Tests % 98 3.3 2787 45 900 % 19 1.8 81.1 40 800 % 0.7 1.52 10.6 35 700 0 1.37 6.8 30 600 0 1.3 5.94 25 500 0 1.1 4.54 20 400 0 0.86 3.17 15 300 0 0.85 2.74 10 200 0 0.68 2.25 5 100 LA(av) J(av) (ms) L(av) (ms) # of Meet ings Total users
- 34. Test results with single and double queuing 16.1 16.2 16.1 16.1 Broker 2 (6 users) 20.2 24.5 20.2 15.8 Broker 1 400 users Avr. (ms) Last User (ms) Mid User (ms) First User (ms) 1.5 1.6 1.5 1.4 Broker 2 (6 users) 20.5 24.9 20.5 16.1 Broker 1 400 users Avr. (ms) Last User (ms) Mid User (ms) First User (ms)
- 46. JMS message paths for an AudioSession
- 48. JMS message paths for a VideoSession
- 50. Mixed video streams in various media players
Notes de l'éditeur
- Each audio package is independent of others. Therefore, each package in the audio stream takes almost the same amount of time to route. This results in very small amount of jitter. In addition, the latency values for the first participant is almost always the same independent of the number of participants in the meeting.
- Since there are multiple video packages in a frame, upcoming packages wait the earlier ones in the frame. Therefore, even the latency values of the first participant increases as the number of participants increase in the meeting. Similarly, the jitter increases as the number of participants increase in the meeting. One broker can support at most 400 participants. Although the broker is saturated when there are 1000 participants.
- Each meeting has 20 participants and one transmitter. Results are gathered from 10 meetings when there are more than 10 meetings. Average latency and jitter is much smaller than single video meeting test results. There is no late arriving packages until 700 participants. Therefore, 35 meetings with 700 participants can be supported by one broker.
- There is one video meeting. There are equal number of participants in each broker. We gather results from first and last user from each broker.