CFA Response: Alt Rate for Video

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Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
Higher Rates for Video Date Submitted 20
February 2002 Source Mary DuVal Company
Texas Instruments Address 6550 Chase Oaks
Boulevard, MS 8479, Plano, TX 75023,
USA Voice972.575.2330, FAX [phone],
E-Mailm-duval_at_ti.com Re Response to High
Rate CFA Abstract Requirements for High Rate
WPAN for Video Purpose Use as one of the sets
of criteria for establishing an alternate PHY for
the High Rate WPAN Standard. Notice This
document has been prepared to assist the IEEE
P802.15. It is offered as a basis for discussion
and is not binding on the contributing
individual(s) or organization(s). The material in
this document is subject to change in form and
content after further study. The contributor(s)
reserve(s) the right to add, amend or withdraw
material contained herein. Release The
contributor acknowledges and accepts that this
contribution becomes the property of IEEE and may
be made publicly available by P802.15.
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CFA Response Higher Rates for Video

• Mary DuVal

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Potential Wireless Projector Applications

• Portability

• Flexible Screen Size

• Simple Installation

• Separable Source Player/Display Pair

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Bandwidth Needed for Relevant Applications
Content Type Source Format BW (Mbps)
Media Player DVD, STB, VCR, D-VHS, Game Console MPEG2, I, 420 (NTSC/PAL) lower quality, DBS/DVD 2
(720x480) MPEG2, I, 420 (NTSC/PAL) good quality DVD 6.0
  MPEG2, P, 420 (US standard) 19.2
  MPEG2, P, 420 (US - ATSC broadcast) 15.0
  MPEG2, P, 420 (Europe) 18.6
Home Movies Camcorders (720x480) DV (NTSC/PAL) 25
3D Computer Games
(1024x768) XGA, Non-standard Compression 38  
(1280x768) SXGA, Non-standard Compression 63
Home Network    
Video oriented entertainment HDTV Broadcast, High Quality DVD, Internet Data MPEG2, IP Packets 31
Multi-media oriented entertainment HDTV Broadcast, Computer Gaming, Internet Data MPEG2, Non-standard compression, IP Packets 63
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Wireless Video Challenges

• Reduced Data Bandwidth
• Compression Trades Image Quality and Bandwidth
• Wireless Must Account for Protocol Overhead
• Maintain High Image Quality With Low Latency
• Smaller BER Required Than Typical Wireless Data
  Link
• Image Processing Measures Can Reduce Effective
  BER, but Increases Protocol Overhead
• Forward Error Correction
• Error Resilience Techniques
• Minimal Buffering at Receiver
• Resistance to Interference
• Ability of Devices to Coexist Must Be Considered
  When Using an ISM Band
• Radio Robust to Interfering Signals
• Ease of Use
• Automatic Device Discovery
• No Keyboard Entry

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End User Requirements
User Requirement Measurement Measurement Requirement
Content Type Data Bandwidth Video 2 25 Mbps 3D Computer Gaming 38 63 Mbps Multi-Media Home Networking 31 63 Mbps
Ease of Use Distance 10 meters (same room) 30 meters (throughout house)
  Power Consumption Possible on battery operated devices
  Device Discovery Simple, Automated
Image Quality Bit Error Rate 10-9
  Quality of Service Isochronous capability
Affordability Consumer Price 300
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Conclusions

• Bandwidth Needs Continue Grow
• Current PHY is Good for a Point-to-Point Solution
• Multi-media Oriented Entertainment Network
  Imminent
• Larger Overhead Will Be Needed for Streaming Data
  to Increase the Quality of the Data Received
• Link Needs to Be Robust to Interference