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SMPTE Journal ( Volume: 110, Issue: 9, September 2001)
[ACTIVE]

Evolving Infrastructures for a Nationwide Data Broadcasting Service

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
110, No. 9, pp. 598–607
Abstract
This paper reviews implementation and operation considerations for supporting a nationwide data broadcasting transmission architecture for non-program-related data. It reviews architectures utilized by PBS National Datacast: VBI, dNTSC, and migration to DTV. Network management requirements to support data delivery are also discussed. For over ten years, PBS National Datacast (NDI) has embedded data streams into existing PBS analog broadcast signals through use of the vertical blanking interval (VBI), and has datacast a variety of multimedia services. Currently NDI delivers data via 260 of the 348 TV transmitters in the PBS system. While VBI has provided a viable option in the past, and continues to provide a niche for certain applications, the data environment today demands more bandwidth; savvy users utilize multiple applications requiring varied types of data. The next step for NDI is implementation of the Dotcast dNTSC (data in NTSC video) technology. The Outcast system uses patent-pending technologies that can inject a 4.5 Mbit/sec digitally encoded data stream into an NTSC broadcast television signal without degrading the signal or interfering with regular television reception. The dNTSC system can make valuable use of existing NTSC assets and provide a smooth transition path to DTV data broadcasting. This paper lays the framework for a data broadcasting architecture where multiple data services contend for a piece of the transport stream, and local data broadcasting opportunities at the station compete with national opportunities for bandwidth.
Publication Date
2001-09-01
DOI
10.5594/J17329
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J17329
Author(s)
David BoroughsPBS National Datacast, Alexandria, VA 22314.
bio
David Boroughs is currently the director of engineering and planning at PBS National Datacast, a commercial subsidiary of the Public Broadcasting Service (PBS), where he also held the position of director of operations. He has over 25 years of experience in the telecommunications industry. Prior to joining National Datacast in 1993, he was an engineering manager at Sprint, and earlier held engineering and planning positions with GTE. He was also recently engineering director at Teleconsult International, an international telecommunications consulting company, where he was involved in various studies for overseas telecommunications, power, and cable companies. Boroughs holds an MBA from Duke University and a BSEE from North Carolina State University. He is a licensed professional engineer.
Copyright
© 2001 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • Development and Performance of the PBS VBI Data Delivery System [Active]
  • ATSC Standard A/90: Data Broadcast Standard, Advanced Television Systems Committee,. EXTERNAL
  • July 2000 . EXTERNAL
  • , EIA: North American Basic Teletext Specification (NABTS) . Eletronic Industries Association , 1984 . EXTERNAL
  • EIA-608: Recommended Practice for Line 21 Data Service . Electronic Industries Association , 1993 . EXTERNAL
  • , RFC: “The Transmission of IP Over the Vertical Blanking Interval of a Television Signal,” The Internet Society Network Working Group . Nov. 1999 . EXTERNAL
  • Ciciora Waller S. “4.5 Mbit/see Data Compatibility Transmitted in b MHz Analog Television.” 1998 NCTA Convention , Atlanta, GA . EXTERNAL
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David Boroughs; Evolving Infrastructures for a Nationwide Data Broadcasting Service, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001. Available at https://doi.org/10.5594/J17329
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David Boroughs; Evolving Infrastructures for a Nationwide Data Broadcasting Service, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001. Available at https://doi.org/10.5594/J17329

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David Boroughs; Evolving Infrastructures for a Nationwide Data Broadcasting Service, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001. Available at https://doi.org/10.5594/J17329
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<span class="citation">David Boroughs; <cite>Evolving Infrastructures for a Nationwide Data Broadcasting Service</cite>, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001. Available at <a href="https://doi.org/10.5594/J17329" target="_blank" rel="noopener">https://doi.org/10.5594/J17329</a></span>

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David Boroughs; Evolving Infrastructures for a Nationwide Data Broadcasting Service, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001
doi: 10.5594/J17329
url: https://doi.org/10.5594/J17329
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David Boroughs; <cite id="bib-10-5594-j17329">Evolving Infrastructures for a Nationwide Data Broadcasting Service</cite>, SMPTE Journal ( Volume: 110, Issue: 9, September 2001); SMPTE, 2001
<span class="doi">10.5594/J17329</span>
</li>