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DVTS Training Bob Riddle Internet2 Commons / BigVideo What if you could use a COTS HandyCam on the Internet? you can send & receive High Quality A/V that doesn’t require funny, expensive machines (MPEG2) that doesn’t involve intellectual property issues (royalties)

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DVTS Training

Bob Riddle

Internet2 Commons / BigVideo


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What if you could use a COTS HandyCam on the Internet?

  • you can send & receive High Quality A/V

    • that doesn’t require funny, expensive machines (MPEG2)

    • that doesn’t involve intellectual property issues (royalties)

    • that doesn’t require unusual, expensive cameras (HDTV)

    • that does require a network capable of doing 30 mbps

  • all you need is a capable Network and …

    • a DV capable camera (HandyCam, DVCAM, DVCPro) with IEEE1394 (firewire) capability

    • DV receiver (DV Player, TV) that is firewire capable

    • Or an analog/digital converter(s) if using a non-firewire capable camera/receiver (Canopus ADVC 100)

    • a computer with IEEE1394 (firewire) capability


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What is IEEE 1394 (firewire) and why should I care?

  • “Firewire” developed by Apple Computer

    • It is really a high-speed serial data bus

    • IEEE 1394 is the published specification for high-speed serial bus

  • 400 mbps over a distance of 4.5meters

    • Double twisted pair, 28 AWG wire

    • Longer distances possible using higher gauges and slower data rates, 800mbps claimed for 2nd generation IEEE 1394

  • DVTS requires the high-speed serial bus to transfer the DV from the camera to the PC!


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What is DV (Digital Video)?

  • Digital Video, put simply, is video that has been digitally sampled

  • Digital Video comes in many formats and data rates:

    • CCIR 601/SDI@ 270-360 Mbps @ 4:2:2

    • Digital composite @ 95-135mbps

    • MPEG2 4:2:2P @ up to 100Mbps

    • High Definition – SMPTE 292M, ATSC rates, and [email protected] 13-100Mbps

    • Streaming Video: Real, WM, Quicktime/Darwin/Sorensen, etc.


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The HandyCam uses DV25

  • DV25 is a common form of digital video reduction and compression employed in consumer digital camcorders

  • DV25 applies a 5:1 compression and a 4:1:1 color space; achieves a fixed data rate of 25 mbps

  • Audio is typically two-channel PCM encoded at 16 bits,48 kHz sampling frequency, uncompressed, similar to digital audio tape (DAT)

  • DV25 achieves relatively high audio and picture quality with very low encoding latency.

  • End-to-end quality is full DV25 video and 16/48


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Where does DV25 “fit” using bandwidth when you put it on the Internet?

  • Real/Quicktime/WM: 150 kbps-1mbps per stream

  • MPEG1: 1.5 mbps - 3 mbps per stream

  • MPEG2: 4 - 15 mbps per stream

  • DV25 (DVTS): 30 mbps per stream

  • Compressed HDTV: 20 - 270 mbps per stream

  • Uncompressed HDTV: requires 1 – 1.5 gbps per stream



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Things you can do with DVTS

  • National Internet2 Day

    • Several schools used DV/IP stream

  • 2003 Fall Member Meeting

    • Rehearsal (Indiana State Museum, IU, CIM)

  • Video “Conference”

    • Both P2P and multipoint (using multicast)

    • Master Class – music instruction

    • Access Grid integration (APAN work)

  • Internet2 “DV Guide”


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What is the “DVGuide”?

Imagine that …

  • you could tune your computer into a series of “educational” channels the same way you tune your television into satellite channels

  • you could send & receive DV quality video across the internet with the same ease as sending & receiving email

  • you could expand the borders of the campus, reaching alumni, colleagues, students, and potential students through an institutional television channel

  • you could do all this without any significant capital expenditure by taking advantage of resources that currently exist on your campus



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brought to you by …

Internet2/ResearchChannel Working Group

  • The Internet2/ResearchChannel Working Group provides a testbed for the exploration of high-quality demand and streaming video applications across Internet2 backbones and associated campus networks.

    BigVideo Project

  • A subcommittee of the Internet2-ResearchChannel Working Group interested in using affordable and widely available cameras, PC’s, software, and hardware began testing DV as an option between typical streaming products and the atypical High Definition Television capabilities.

    USF CVPA (courtesy of Michael Koberstein)



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A word about Echo cancellation

  • When do you need it?

    • Interactive sessions

  • How can I avoid it?

    • Headset, position of microphones & speakers

      • Brian’s audio talk – dynamic, ribbon, condenser mics

    • UW/ResearchChannel Polycom speaker example

  • Should I avoid it?

    • Brian Sheppard might argue for thinking about this carefully with regard to latency/complexity

      • Echo rejection versus echo cancellation

      • Electronic devices: Voice versus music


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A quick word about lighting/audio

  • match investment to the event

    • Personal video conference

    • Master’s class

    • Demo for “funding sources”

    • Nationally “broadcast” stream

    • Etc.


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DVTS – software

Software encoding/decoding using the PC processor, NIC, etc.

Requires a firewire card to “send” (and for “firewire” receive)

Runs on number of platforms, though Windows XP has the best GUI (OS X progress, Linux KNOPPIX dvts_pl from IU)

Windows, and Linux can use PC monitor for display

Software available for download at:

DVTS Consortium & WIDE project

My “working notes”

CometDVIP

Hardware implementation from Fujitsu Labs

Allows a “blackbox” like device to support DV/IP

Current video conferencing tests have been remarkable

How do I get started?


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Hands-on time!

  • On your laptop you can try:

    • DVTS for WinXP

    • Knoppix Distribution from IU

  • Find a buddy

    • For unicast “video conference”

  • Try out the CometDVIP hardware

  • Come see me!

    • When ready for multicast experiment!

  • DVTS “in a box” from UW



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