The document discusses the challenges and solutions for making real-time video communications work over the public internet, highlighting issues such as packet loss, bandwidth limitations, and delay. It emphasizes the importance of quality in video communication and presents Radvision's solutions, including scalable video coding and effective bandwidth estimation techniques. The company aims to integrate video seamlessly into electronic communications through comprehensive development solutions and innovative technologies.

1. Name: Title:
Name: Title:
Making Real-Time Video Work
Over The Internet
Amir Zmora
Sagee Ben-Zedeff Director of New Technologies
VP Marketing & Products, TBU

2. Agenda
Visual Communications Over The Internet?!
The Challenges of the Public Internet
Making Real-Time Video Work
About RADVISION

3. Visual Communications Over The Internet?

4. Visual communications is happening

5. Used to bridge geographical barriers
The Number of Consumer Video Conferences
projected to grow by more than 8 times between
2010 and 2015.
- GigaOm, 2010

6. Gopher, FTP
WWW
P2P
Video
Content
Video
Communication
Dominant
Traffic Type
1993-1995
1995-2000
2000-2013
2013-2025
2025+
1995: Web overtakes Gopher, FTP
2000: Peer-to-Peer overtakes Web
2013: Video Content overtakes
Peer-to-Peer
2025: Video Communication
overtakes Video Content
Source: Cisco 2010

7. For Visual Communications, Quality is Key

8. QoS costs…

9. So why not use
the Internet?!

10. Poll question: What are the main challenges
for using the Internet for real-time video?
Packet Loss
Insufficient Bandwidth
Delay
Finding who/how to call
Etiquette peripherals on the other side

11. The Challenges of the Public Internet

12. Video flows in pipes…
Output Input

13. If the pipes don’t have enough capacity…
Delay
Output Input
Packet Loss
Congestion

14. Typical IP Network Impairments
Corruption
Corrupted packet
rejection
Multi-path
Collisions
Congestion
Dropped by router /
switch
Packet Loss

15. Jitter
TX
RX
T T+2Δ T+4Δ T+Δ
Typical IP Network Impairments

16. Packet loss significantly reduces quality!

17. Too many users
Too many tasks
Home Worker/Road Warrior
There is no such thing as
enough bandwidth…

18. Productivity is the name of the game
By EOY 2011 ~75% of US workforce will
require mobile capabilities
WW mobile workers increase
from 759M in 2006 to >1Bn by 2011

19. Low delay
No artifacts
The right bandwidth
High definition resolution
High quality codec
High quality peripherals
High Quality of Experience Check-list

20. Making Real-Time Video Work
Technologies and Solutions

21. Effective Bandwidth Estimation & Adaptation

22. How does it work?
Packets
Delay!
Output Input

23. Look for congestion and
solve it before packets are dropped

24. 0
128
256
384
512
640
768
0 10 20 30 40 50 60 70
Bandwidth(Kbps)
Time (seconds)
Available bandwidth
NetSense estimation
How does it work?
Monitors delay for “trends”
Reacts accordingly
Converges quickly to the effective bandwidth

25. Key Elements for Bandwidth Estimation
Delay based vs. Packet loss based
Faster convergence time
Better evaluation of effective bandwidth
0
128
256
384
512
640
768
0 20 40 60
Bandwidth(Kbps)
Time (seconds)

26. Quality of Experience Latency
NetSense vs. Competition
* G.1070 score - The higher the score, the better the quality * The lower the latency, the better the quality
1
1.5
2
2.5
3
3.5
4
4.5
Videoquality(1-5)
NetSense Google Talk Microsoft OCS (2.0.6362.36)
1
10
100
1000
Latency(milliseconds)
NetSense Google Talk Microsoft OCS (2.0.6362.36)

27. Scalable Video Coding – The Promise
Generate a single video stream that can serve
multiple users
“One ring to rule them all”
The Lord of the Rings, J.R.R Tolkein

28. Scalability of Video - Modalities
Temporal - Change of frame rate (e.g 30 FPS, 15 FPS)
Spatial - Change of resolution (e.g 720p, 480p, CIF)
Fidelity / SNR - Change of quality (e.g 1 Mbps, 512 kbps)
0
20
40
0
500
1000
0
500
1000
1500
FPSResolution (H lines)
Bitrate(Kbps)

29. The Hidden Promise of SVC
H.264

30. The layered structure of SVC introduces higher level of
error resilience
H.264 SVC
The Hidden Promise of SVC

31. The layered structure of SVC allows for Unequal Error
Protection (UEP)
H.264 SVC
The Hidden Promise of SVC

32. Protect SVC base layer
Dynamic FEC strength
FEC-XOR, FEC-RS
Reliable Transmission - FEC

33. SVC is Not Just a Single Cake
SVC
Transport Signaling
Unequal
Error
Protection

34. Handling IP Network Impairments
Packet Loss - Corruption
SVC + FEC
Packet Loss - Congestion
NetSense
Jitter, Out of Order
AJB

35. RADVISION’s Solution
SVC + FEC AVC5% packet loss5% packet loss

36. 12
14
16
18
20
22
24
26
28
30
32
0 5 10 15 20
PSNR(dB)
Packet Loss Rate (%)
PSNR Vs. Packet Loss Rate
H.264
H.264 SVC

37. Poll question: Where do you see video
communications usage growth in the next 5 years?
Enterprise “islands” (H.323, over MPLS)
Inter-Enterprise Communication (SIP, over public
Internet)
Vertical-specific applications – mobile and fixed
Home entertainment

38. About RADVISION

39. A Global Market Leader
Industry Leader in Video communications over IP products and
technologies since 1992
First to market with VoIP technology solutions
Annual Revenues in 2009 - $81 Million
Strong Debt-free Balance Sheet with $126M in Cash
Listed on NASDAQ:RVSN March 2000
440 Employees Worldwide
4 Major Development Sites
17 Sales and Support Offices
39

40. Two Complementary Business Units
Technology Business Unit (TBU)
Advanced HD Video Client Products and Frameworks
Enabling Technology for Developers of Video and Voice over IP (V2oIP), 3G
and IMS Client/Server solutions
Market Share Leader in Protocol Stacks (H.323, SIP, IMS)
Professional Services Group
Video Business Unit (VBU)
Video and Voice Conferencing Solutions for the Enterprise Market
Infrastructure, Management Software and Endpoints

41. Technology Business Unit Mission
Making video a natural part of every electronic
communication by providing a complete Video
Development Solution

42. A Comprehensive Solution Portfolio
Meeting all Your Development Needs
Conference
Bridges Gateways IVRs
Protocol
Validation
Media Quality
Analysis
Video Clients VoLTE 3G Handsets IMS Clients
SBCs
IP-PBXs Proxy Servers
Presence &
IM X-CSCF UC Servers
IADs

43. Client Products & Projects SIP Server Products
Turnkey Solutions - Professional Services
Client Frameworks SIP Server Frameworks
Multimedia Terminal Framework
SIP Server
Core
Presence
& Events
B2BUA
NAT Traversal MSRP A-RTP
Protocol Toolkits
Diameter
IMS SIP Suite H.323 MEGACO MGCP 3G-324M
Testing
Products
Testing &
Validation
Technology
End-to-End Product Portfolio
SIP Developer Suite

44. BEEHD Family of Products
44
BEEHD Core
BEEHD for Desktop BEEHD for
Enterprise
BEEHD for
Personal
Devices

45. BEEHD
Complete HD Visual Communication Client Software
Video
Telephony
Management Integration
Application
Development
Troubleshooting
Customer’s GUI Application
Operating System and Hardware Platform

46. SW Architecture
HD Camera
Display Input
Microphone
Display
Speakers
Network

47. BEEHD Family Key Benefits
Complete &
Customizable
Solution
Application-
Signaling-Media
Multiple
Platforms
#1 Leader in
Customizable
Solutions
Part of RVSN
Solution

48. More Information?
BEEHD Product Page
http://www.radvision.com/BEEHD/
How to Develop Hardware For an HD Endpoint?
http://blog.radvision.com/howto-develop-hardware-for-hd-video/
SVC
http://www.radvision.com/SVC/

49. Where to Find Us?

50. Thank you!
Sagee Ben-Zedeff
Director, New Technologies
RADVISION
sagee@radvision.com
Amir Zmora
VP Marketing and Products
RADVISION
Technology Business Unit (TBU)
amirz@radvision.com