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Can HD video run over one converged network

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This session give network managers an insight into the impact of HD surveillance video running over existing …

This session give network managers an insight into the impact of HD surveillance video running over existing
voice and data networks. It will cover how OoS can be maintained an ally any fears on the impact of network
performance and user impact.

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Transcript

  • 1. Can HD run over one converged network?
    • October 2010 Les Litwin Sales Director
  • 2. Applications for HD over an IP Network
    • High quality CCTV surveillance
    • Door entry video cameras
    • Streaming video-entertainment
    • High quality virtual/remote desktop
    • Hospital MRI CT over IP
    • Production and process monitoring
    • Corporate web sites
  • 3. Raw Video Data Rates M Bits/second
  • 4. Video Codecs
      • H264 Codec PAL NTSC= 1-2MBits/s (CCTV Quality)
      • H264 Codec HD 1080P30 = 2-8 Mbits/s (CCTV Quality)
      • Lower data rates can be achieved using reduced frame rates, resolutions, codec tools and other bandwidth efficiency techniques
  • 5. H264 Video Codecs
    • I, P and B frames
    • I Frames - Intra Codec (Reference) Frame
    • P Frames - Predictive (Difference) Frame
    • B Frames - Bi-Predictive (Pre and Post)
    • GOP - Group of Pictures
    The Basics of Compression
  • 6. Video Data over IP ‘ H264 data is not smooth and linear’ I frame data typically occupies 40mS-1 frame P frame data varies from 0 to infinity (typically 2-10 seconds, 50-250 frames) I Frames P & B Frames GOP in no of frames Target Data Rate
  • 7. Methods to manage video data rates
    • CBR - Constant Bit rate
    • VBR - Variable Bit Rate
    • Frame rate
    • Resolution
    • Choice of Codec/compression
    CBR = Constant Bit Rate = Average bit rate over time I frame spikes of data rates above CBR rate. VBR = Variable Bit rate = less controlled average, P & B frames allowed to vary in data size depending on motion to give better quality
  • 8. Data Rates- Examples
    • Full HD Video fast action full frame rate
      • - 4-8 Mbits/sec
    • SXGA virtual desktop over IP @ 60Hz
      • - 2-4 Mbits/sec
    • Full HD 1080P video with 5 fps VBR Normal
      • - 800kBits/s to 1.5MBits/sec
    • Full HD 1080P video 5 fps CBR=1MBit/sec
      • - 500kBits/sec -1MBits/sec
  • 9. DEMO Showing quality versus data rate
  • 10. Network Management
      • Recording or just viewing
      • Triggered recording rather than continuous
      • Local storage of video rather than centralised
      • Simulcast (Pull) V Multicasting (Push/Pull)
      • Frame rates - choose based on subject type
      • Audio - one or two way
      • Numbers of people viewing video streams
    Issues that affect network bandwidth
  • 11. Multicast for large numbers of viewers Regardless of number of viewers server sends only one stream
  • 12. Network Management 2
    • Recording high quality stream
    • Viewing lower quality secondary stream
    • Video storage kept on independent network for CCTV/Video
    • Video viewing over general network
    • Large numbers of viewers consider multicasting
    Main H264 Stream Secondary stream Recording Viewing Dual Streaming
  • 13. Video Management Software- VMS
    • VMS can simultaneously control all IP cameras and servers
    • Ability to ‘Propagate to All’ feature to set video data rates on ALL IP cameras/servers
  • 14. PC Performance for viewing H264 HD Video
    • EXAMPLE
    • 3 x Full HD 1080P30 streams
    • Decoded by one PC
    • Requires a good Quad Core Motherboard
    • Requires high end graphics card
    • Requires 500-1000MBytes of Graphics RAM
  • 15. Typical HD Video + Virtual Desktop Solution
  • 16. Video over IP Options IP Network NETWORK VIDEO AUDIO
  • 17. Video codec QoS Summary
    • 1 x HD Video can use up to 10MBits/s or as little as 50kBits/sec
    • Recording - based on events saves bandwidth
    • Viewing - using secondary stream lower data rates
    • Intelligent VMS software turns off streams when not being viewed
    • CBR and VBR choices will affect bandwidth
    • Local recording rather than central NVR
    • Separate CCTV/NVR network - viewing over entire network
  • 18. Contact
    • Les Litwin - Technical Sales Director 8 Hasting Close Bray Berks United Kingdom SL6 2DA
    • Telephone: +44 (0)1628 626098 Fax: +44 (0) 1628 681566 Email: [email_address]