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PBS Stations Use T-VIPS System to Transport Video

Content is converted, transported over IP and converted back to the original format.

Public Broadcasting Station (PBS) WNET, the PBS affiliate serving the New York City area, has selected the T-VIPS TVG420 ASI to transport over the Internet, the stations’ locally produced programming to the PBS Network Operations Center, in Alexandria, Va., T-VIPS says in a written statement.

T-VIPS, a producer of professional video transport solutions for contribution, distribution and “digital terrestrial television,” says to transport the video, WNET first encodes its high-definition (HD) video to a 30 Megabit MPEG-2 ASI transport stream.

WNET then uses the T-VIPS TVG420 ASI to IP Gateway to move the compressed digital video over a high-performance OC 3 IP network to PBS’ network operations center in Alexandria for HDTV broadcast nationwide. At the PBS network operations center, the video enters the facility-wide workflow where it’s decoded back to ASI-HD video for broadcast.

“We’re extremely pleased with the reliability and performance of the T-VIPS TVG420 Gateway solution,” said Jeff Dockendorff, WNET’s associate director of engineering. “Our goal is to deliver a very high-quality product to PBS, and with the TVG420, the picture quality is exceptional.”

In addition, Boston PBS affiliate, WGBH, employs the T-VIPS CP510 “transport stream processor” to filter select services from the WGBH-DT transport stream for delivery to Thames Valley Communications, a cable television, high-speed Internet, and digital phone service provider in Groton, Conn. The T-VIPS CP510 enables flexible adaptation and filtering of MPEG transport streams and component filtering, as well as PSI/SI/PSIP table updates.

“WGBH looked at dedicated circuits for delivery to Thames cable but the cost was prohibitive,” said Michael Foti, WGBH’s director of engineering. “I’d seen a demo of video over IP using the TVG420 and was impressed with its performance over the public Internet. We had to put something together fast with little budget, and the T-VIPS demo came to mind.”

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