Transcript 02047r0P802-15_SG3a-CFA-Response-Alt-Rate-for

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Jan 2002
doc.: IEEE 802.15-02/047r0
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]
Voice:[972.575.2330], FAX: [972.575.0989], E-Mail:[[email protected]]
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.
Submission
Slide 1
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
CFA Response:
Higher Rates for Video
Mary DuVal
Submission
Slide 2
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
Potential Wireless Projector Applications
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Submission
Portability
Flexible Screen Size
Simple Installation
Separable Source Player/Display Pair
Slide 3
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
Bandwidth Needed for Relevant Applications
Content Type
Source Format
BW (Mbps)
Media Player:
DVD, STB, VCR, D-VHS, Game Console
MPEG2, I, 4:2:0 (NTSC/PAL)
lower quality, DBS/DVD
2
(720x480)
MPEG2, I, 4:2:0 (NTSC/PAL)
good quality DVD
6.0
MPEG2, P, 4:2:0 (US – standard)
19.2
MPEG2, P, 4:2:0 (US - ATSC broadcast)
15.0
MPEG2, P, 4:2:0 (Europe)
18.6
Home Movies: Camcorders (720x480)
DV (NTSC/PAL)
25
(1024x768)
XGA, Non-standard Compression
38
(1280x768)
SXGA, Non-standard Compression
63
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
3D Computer Games:
Home Network:
Submission
Slide 4
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
Wireless Video Challenges
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Reduced Data Bandwidth
– Compression Trades Image Quality and Bandwidth
– Wireless Must Account for Protocol Overhead
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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
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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
Submission
Slide 5
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
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
Bit Error Rate
10-9
Quality of Service
Isochronous capability
Consumer Price
$300
Image Quality
Affordability
Submission
Slide 6
Mary DuVal, Texas Instruments
Jan 2002
doc.: IEEE 802.15-02/047r0
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
Submission
Slide 7
Mary DuVal, Texas Instruments