A SMPTE 292M/OC-48c Video Network Access Unit (VNAU)

Philip S. Crosby, Scott W. Lowrey

Transmission of uncompressed high-speed digital SMPTE 292M video data is currently limited to relatively short distances: an electrical cable connection of up to 100 m or a direct optical fiber connection of up to 2 km. A prototype video network access unit (VNAU) implements transport of uncompressed SMPTE 292M serial video data packaged into asynchronous transmission mode (ATM) cells over a synchronous optical network (SONET) OC-48c link. This allows long-distance transport of uncompressed HDTV video using the public switched network. Network performance testing using a Tektronix VNAU, a FORE Systems switch, and the ATDNet was conducted at FORE Systems (Warrendale, PA) and the Naval Research Labs (Washington, DC). Network performance was monitored using control signals from the VNAU direct digital synthesizer (DDS), which allows a straightforward measurement of ATM cell latency without additional hardware.

Print ISSN
Published
2000-03
Content type
Original Research
DOI
10.5594/J08346