This document summarizes a technology called Video54 that aims to provide reliable wireless video networking over standard 802.11 wireless networks. It discusses the challenges of transmitting multiple video streams through homes due to obstacles and interference. Video54 uses specialized software algorithms and inexpensive antennas to minimize these issues and work with any standard wireless chipset, providing cost savings over wired installation. It has achieved test results with higher signal strengths than baseline systems and seeks partnerships to bring the technology to market.

1. Technology for Reliable
Wireless Video Networking
Multiple DVD or HDTV or STB streams
operating in a real home environment

2. Who we are
• Sequoia Capital incubated company
– Small experienced team
• Expertise in networking, communications software,
wireless systems, antennas, consumer electronics
and digital media
– 4 man-years of new work
• Inexpensive antennas
• Networking software
• Leverage standard 802.11a/g chipsets
– No new silicon!

3. Current Status
• Alpha stage technology
– Real world testing in actual homes
– Extensive simulations
• Discussions with key market participants
• Determining:
– Potential business relationships & partnerships
– Appropriate business model
– Appropriate funding partners

4. Performance Goals
Distance
(feet)
Obstacles
2 HDTV streams 40 1-2 walls
1 HDTV + 2 DVD 50 2-3 walls
1 HDTV + (1 DVD or 2 STB) 60 3 walls
3 DVD streams or 1 HDTV 70 3-4 walls
2 DVD or 3 STB streams 80 4 walls
1 DVD or 1-2 STB streams 100 4-5 walls
Audio and data only 120 4-5 walls
HDTV @ avg. 18Mbps; DVD @ avg. 6Mbps; STB @ avg. 4Mbps
‘walls’ equals typical wood frame inside wall; an outside wall or a roof
can equal 1 or up to 2+ inside walls. Lots of metal clutter or items such
as a mirror can also hurt the signal equivalent to or more than an inside wall.

5. Reliable Wireless Saves $s
Installation Today With
V54
Savings
1 Room: Basic IRD* $275
2 Rooms: All Basic IRDs $455 $400 $55
3 Rooms: All Basic IRDs $675 $475 $200
3 Rooms: Basic + 2 PVRs $1235 $770 $465
Avg Case $750 $650 $100
Annual savings can be over $250M
* IRD: Integrated Receiver Decoder (Set Top Box)

6. The Overall Problem
• Making Wireless Video Reliable & Inexpensive
– Very few product returns
– Customer satisfaction
• Distance
• Obstacles & Interference
• Multi-stream
• Easy to install and use
• Integration with video subsystems
• In short: wireless is flaky due to ‘path loss’ issues

7. The Coverage Problem
TV
&
STB
Minimal Pathloss
Region
Multipath Region
Deep Shadowing
Region
mirror

8. House Coverage
Small
House
Medium
House
Large
House
Minimize
Pathloss
35% 30% 25%
Totally Solve
Multipath
Problem
60% 60% 60%
Eliminate Deep
Shadowing
5% 10% 15%
100% 100% 100%

9. ‘Path Loss’
Multi-path fading with slow Doppler:
dropped connection, highly unpredictable bandwidth
( See Simulation)
SignalStrength(dB)
1 foot
Red areas indicate > 5dB signal fade, system with a 5dB margin
will experience an outage if/when antennas are located in red areas.
time timeTop
view

10. Possible Solutions
• Special Silicon
– Most are expensive and non-standard
– More power (pros & cons)
• Smart Antennas
– MRC, SDMA and MIMO are either
too complicated and expensive or
do not solve enough of the problem
• Other
– Video ‘downcoding’
– Repeater
– UWB
• Video54:
– Special software algorithms
– Special inexpensive antennas
– Usable with any standard 802.11a/g chipset

11. Comparing Techniques
Pathloss Multipath
Interference
Deep
Shadowing
Comments
Boost Power Great N/A N/A Is gain worth
price?
MRC OK Good N/A Not enough
value for cost
MIMO Good Good N/A Expensive
Beam Forming Good OK N/A Good but
expensive
V54 – Basic Great Great OK
V54 – Advanced Great Great Great
QOS – ‘802.11e’
or TDM
N/A N/A N/A Must for any
solution
Down Coding N/A N/A N/A To be avoided if
possible

12. Spatial
Micro
Spatial
Macro
Pattern
Polarization
Temporal
Frequency
Hyper
Diversity
Our Approach
• The problem is statistical in nature therefore the
right approach for a reliable inexpensive solution
is ‘Hyper DiversityTM
’
Sceos Technologies (aka Video54) Confidential

13. Video54 Advantages
• Use any standard 802.11a/g chipset
– Flexibility for product developer
– Enables use of least expensive suppliers
• Enables end product to be part of standard
home network with multiple sources and
users of digital video streams plus data
• Better customer experience and fewer
returns

14. 3
4
5
6
7
8
9
10
11
80 90 100 110 120
Off-the-shelf Total Pathloss (dB)
ReceivedSNRgain(dB)
Base case #1: Atheros 5211 mini-PCI card, Micro Mobio MMPA745 power amp,
2-4dBi DWL-AB520 off-the-shelf omni antennas. V54 results use the same wireless card/PA.
Video54 SNR Gain Versus Base Case #1
(actual test results)
Test Results

15. Intellectual Property
• 12 Patents in progress
• Basic
– Antennas and software
– Leverage standard chips
• Advanced
– Inexpensive companion chip
– Combinatoric Antennas
– Soft Repeater