Simon Millard

Delivering IP-based video solutions for mobiles

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Agenda

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

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Market drivers and devices

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Market drivers

ARPU

Customer churn

£ Customer Acquisition

£ Customer retention

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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

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3G devices

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200

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M A M J J A S O N D J F

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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

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Applications

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Applications

“See what I see”

Video chatVideo

conferencing

Conversational

Video ring tones

Games

Video clips

Videomail

IVVRIPTV

Video on demand

Pay-per-view

Content

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Phone to phone video

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Content delivery

• News/sport• Music• Vblogs• Betting• Adult

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Compression

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Do we need to compress?

Uncompressed video :

Height 483 linesWidth x 720 pixelsFrame rate x 30 fpsColour x 20 bits/pixelFrame overhead x 1.3

== 270Mbps

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Compression

QCIF video :

Height 144 linesWidth x 176 pixelsFrame rate x 30 fpsColour x 20 bits/pixelFrame overhead x 1.3

== 20Mbps

Frame rate x 15 fps== 10Mbps

Colour x 16 bits/pixel== 8Mbps

Resolution Size

SQCIF 128 x 96

QCIF 176 x144

CIF 352 x 288

VGA 640 x 480

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Compression

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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)

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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)

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Compression

QCIF video :

Height 144 linesWidth x 176 pixelsFrame rate x 7.5 fpsColour x 0.2 bits/pixelFrame overhead x 1.2

== 45kbps

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Compression

• Audio compressed separately– AMR or G.723.1

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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

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3G-324M

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3G-324M

Video I/O Equipment

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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

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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

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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

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Gateways and content adaptation

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Content adaptation

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Content adaptation

Transcoding

Frame size conversion Qcif, cif, D1

Frame rate conversion 5fps to 30fps

According to bandwidthBit rate adaptation

Coding syntax conversion H.263, H.264, MPEG4

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Content adaptationMulti-screen video

conferencing

Text and logo insertion