2. Simon Millard Delivering IP-based video solutions for mobiles

3. 3 Agenda Market drivers and devices Applications Compression 3G-324M Gateways and content adaptation

4. 4 Market drivers and devices

5. 5 Market drivers ARPU Customer churn £ Customer Acquisition £ Customer retention

6. 6 3G devices By the end of February 2007 there were 444 million paying subscribers on 3G networks in 35 countries Take up is faster than 2G was

7. 7 3G devices

8. 8 Video on mobiles By 2010 there will be 102 million mobile video subscribers worldwide – In-Stat Worldwide revenues from P2P video calls will reach $6.1 billion by 2009 – Ovum Revenue from mobile video and mobile TV applications will reach nearly $2 billion in Europe by 2009 - IDC

9. 9 Applications

10. 10 Applications

11. 11 Phone to phone video

12. 12 Content delivery News/sport Music Vblogs Betting Adult

13. 13 Compression

14. 14 Do we need to compress? Uncompressed video : Height 483 lines Widthx 720 pixels Frame ratex 30 fps Colourx 20 bits/pixel Frame overheadx 1.3 == 270Mbps

15. 15 Compression QCIF video : Height 144 lines Widthx 176 pixels Frame ratex 30 fps Colourx 20 bits/pixel Frame overheadx 1.3 == 20Mbps Frame ratex 15 fps == 10Mbps Colourx 16 bits/pixel == 8Mbps ResolutionSize SQCIF128 x 96 QCIF176 x144 CIF352 x 288 VGA640 x 480

16. 16 Compression - Most videos have little motion between frames. We can subtract the previous frame from the current and only encode the differences (which even with ‘fast moving action’ tend to be small)

17. 17 Compression 3 types of frame – I, P, B –Intra-coded Compressed version of the frame itself –Predictive coded Look for a (16x16) macroblock that best matches the one being coded and generate a motion vector –Bi-directionally predictive coded As above but uses both preceeding and following frames Typically IBBPBBPBBPBBI (a GOP)

18. 18 Compression QCIF video : Height 144 lines Widthx 176 pixels Frame ratex 7.5 fps Colourx 0.2 bits/pixel Frame overheadx 1.2 == 45kbps

19. 19 Compression Audio compressed separately –AMR or G.723.1

20. 20 Bringing it together – 3G-324M 3G-324M is the umbrella protocol which covers audio, video, and their transmission ITU H.324M adopted by 3GPP Requires 64 kbps circuit-switched bi-directional data channel –Provided by the PSTN, so video calls from mobile to mobile can traverse the PSTN

21. 21 3G-324M

22. 22 3G-324M

23. 23 3G-324M H.223 H.223 multiplexes outbound video, audio, data and control streams into a single bit stream suitable for transmission down a 64 kbps constant bit-rate pipe, and de-multipelxes the inbound stream into the relevant media stream. Also performs framing, sequence numbering and error detection/correction

24. 24 3G-324M H.245 H.245 is the control channel; it provides for terminal capability exchange and media channel management H.245 also used by H.323

25. 25 3G-324M As a technology 3G-324M presents the following benefits –Guaranteed quality of service –Easy to use –Standard revenue collection approach –Simple to deploy

26. 26 Gateways and content adaptation

27. 27 Content adaptation

28. 28 Content adaptation

29. 29 Content adaptation