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

Transmission of uncompressed high-speed digital SMPTE-292 video data is currently limited to relatively short distances; an electrical cable connection of up to 100m, or a direct optical fiber connection of up to 2km. We have demonstrated a prototype Video Network Access Unit, which implements transport of uncompressed SMPTE-292 serial video data packaged into ATM cells over a SONET OC-48c link. This allows long-distance transport of uncompressed HDTV video using the public switched network. Network performance testing using the Tektronix Video Network Access Unit (VNAU), the FORE Systems ASX-4000 switch, and the ATDNet was conducted at FORE Systems (Warrendale, PA) and the Naval Research Labs (Washington, D.C.). Network performance was monitored using control signals from the VNAU Direct Digital Synthesizer (DDS). The VNAU operated with the FORE switch and over ATDNet with no problems whatever. The DDS allows a straightforward measurement of ATM cell latency without additional hardware.

Published

1999-02

Content type

Original Research

DOI

10.5594/M00939

ISBN

978-1-61482-930-0