Wireless Video

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Wireless Video
Yun Gong Assistant Professor Department of
Electrical Engineering Widener University July
6, 2004
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Outline

• Technology Focus
• Mobile Wireless Multimedia Services
• Desirable Video Technology for Mobile Wireless
• Video Coding Standards
• H.264/AVC Video Coding Standard
• On-going and Future Innovations at Widener

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Partnership Technology Focus
Video Encoder
Video Decoder
Integrated Wireless Technologies
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Mobile Wireless Multimedia Services
Value-added services for wireless carriers.

• All U.S. cellular operators either offer video
  mail service now or will by the end of the year.
• the quality of current mobile phone video is
• terrible. Motion is jerky and blurry, colors are
• faded and the image is tiny.
• Mike Langberg, San Jose Mercury

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Desirable Video Technology for Mobile Wireless

• High compression efficiency
• DVD-quality (720x480_at_30fps) 9.8Mbps
• Mobile wireless bandwidth Kbps
• Strong error-resilient capabilities
• High error bit rates and bursty errors
• Low computational complexity and power
  consumption
• Handset device limitations and short battery
  life-span

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Video Coding Standards
MPEG-1/2 and H.261/263 not for wireless
applications MPEG-4 and H.263 many
error resilient tools have been adopted for 2.5G
and 3G devices by leading wireless
companies. H.264/AVC (MPEG-4 Part 10)
most recent standard.
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H.264/AVC Video Coding Standard

• Extremely high quality in smaller files.
• Highly Scalable, producing video for everything
  from 3G
• to High Definition (HD).
• Great-looking 3G mobile content at 50-160 Kbps
• Excellent Standard Definition (SD) video at
  800-1500 Kbps
• Beautiful HD video (1280x720, 24p) at 5-7 Mbps
• Full HD video (1920x1080, 24p) at 7-9 Mbps

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On-going and Future Innovations at Widener

• Develop H.264/AVC-compliant error resilient
  techniques
• by integrating time varying wireless channel
  characteristics
• and power constraints into the coding process

H.264/AVC Encoder
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Minimize D ? R D Dcoding Dchannel Dpower
D distortion R bit rate ? positive
number
H.264/AVC Decoder
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On-going and Future Innovations at Widener
(continue)

• Real-time hardware implementation of H.264/AVC
• encoder and decoder by employing FPGAs
• Video/image compression in general
• Others
• Networked video systems
• Security issues in wireless video