PBS Stations Use T-VIPS System to Transport Video

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