Video Products Group Optimizes DS3 Capacity.

Carriers Transport Two HD Channels on Single DS3 Line with Room to Spare

OXNARD, Calif. -- Video Products Group, Inc., (VPG), a leading provider of end-to-end NEBS 3 -- compliant video transport equipment has developed a solution that enables broadcasters and telecomm service providers to double the HD capacity of their DS3 connections. In most implementations of DS3, only about 38 -- 39Mbps of the protocol's 45Mbps line rate is available as usable bandwidth. From 6 -- 7Mbps are dedicated to overhead data. Since a high-definition ATSC stream requires 19.4Mbps, only one HD channel will fit into a DS3 pipe.

In contrast, technology from VPG reduces DS3 overhead requirements by over 65%, increasing DS3 usable bandwidth to 43Mbps. The increased capacity can support two high-definition transport streams, with an additional 4Mbps available in another ASI port for other uses. This represents a significant savings for companies provisioning HD signal transport channels.

"Optimizing DS3 throughput delivers benefits to our customers out of proportion with the number of megabytes saved," says Eugene Keane, CTO of Video Products Group. "Many of our customers face an urgent need to deploy new HD capacity on ambitious schedules. For them, the ability to squeeze two HD channels into an existing DS3 line might mean that their deadlines aren't impossible after all. The dollar savings are important," he adds, "but they're not the complete picture."

VPG's VS192 SMPTE-310 to DVB-ASI converter card accepts two independent HD transmission streams at 19.39Mbps, and transmits two DVB-ASI channels at 270Mbps. ASI output from the VS192 can be configured as electrical or optical signals. In turn, DVB-ASI signals can be multiplexed into DS3 with the VPG9345 card, which supports DVB validity checking and Reed-Solomon Forward Error Checking. The VPG9345 card also links to VPG's network management system and supports individual channel bandwidth boundaries, so bandwidth can be allocated to specific clients.

About Video Products Group

As a provider of digital video transport equipment, VPG equipment is the essential ingredient for many of the major digital video transport networks of the world today. A recognized technological innovator, VPG leads the industry in digital migration with the development of standards-based equipment supporting digital or analog interfaces, transporting uncompressed and compressed SMPTE 292M and SMPTE 259M across metropolitan and SONET/SDH networks. The company also provides comprehensive element management products, as well as quality of service monitors and network protection products.

Since its founding in 1985, Video Products Group, Inc. has focused on developing and manufacturing end-to-end video/audio transport systems for LAN and WAN environments. VPG products are developed and manufactured under strict internal quality control, based on ISO and NASA requirements, assuring the highest levels of performance, flexibility and reliability for critical audio/video/data transport applications.

http://www.vpginc.com/

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