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SCIENTIFIC-ATLANTA DIGITAL VIDEO COMPRESSION SYSTEM SETS STAGE FOR ECONOMIC FIBER-OPTIC TV DISTRIBUTION

 TULSA, Okla., April 16 /PRNewswire/ -- Vyvx, Inc., the nationwide television services affiliate of WilTel, and IDB Communications Group, Inc. (NASDAQ: IDBX), a leading transmission services provider, today announced that the companies have ordered an MPEG (Moving Picture Experts Group)-based digital video compression system from Scientific- Atlanta, Inc.
 Terms of the agreement were not disclosed.
 The selection of the Scientific-Atlanta compression system is the result of a Vyvx request for proposal issued 10 months ago to leading manufacturers of coding equipment. The RFP called for equipment that would provide a high-quality television signal at a rate of approximately six megabits-per-second (Mbps) over the company's nationwide fiber-optic television transmission system. Concurrent with the Vyvx RFP, IDB tested similar satellite compression systems.
 The Vyvx system currently carries one contribution-quality (exceeds broadcast quality) television signal at a non-compressed DS-3 rate (45 Mbps). The Scientific-Atlanta compression system will allow Vyvx and IDB to initially carry four broadcast-quality signals per DS-3 or satellite transponder and allow cost-effective end-to-end digital transmission, including both first- and last-mile digital links.
 The compression system will be deployed in the second quarter of this year.
 As part of the initial deployment of the compression system, Vyvx and IDB plan to provide access to sports backhauls to major broadcast and cable networks and television stations nationwide. The digital feeds will be available from both satellite and fiber-optic delivery systems nationwide in May and allow the cost-effective and customized production of individual sports highlights.
 "By deploying this advanced Scientific-Atlanta compression system and partnering with IDB, we will significantly enhance the way in which television signals are sent and received," said Del Bothof, Vyvx president. "For the first time, distributing television programming on a point-to-multipoint basis over a terrestrial based fiber-optic system becomes economically viable.
 "When you consider the combined capabilities of the Vyvx and IDB networks, and the Scientific-Atlanta compression system, the potential for advanced television delivery services is immense," Bothof said. "We are already examining a similar highlight feed service for news and the regional insertion of advertising - this is just the beginning."
 "IDB is pleased to be teamed with Vyvx and Scientific-Atlanta for this high-quality service," said John Tagliaferro, president of IDB Broadcast. "Compression technology is the next step in broadcast transmission technology and we are proud to be taking part in this project."
 The Scientific-Atlanta digital compression system consists of encoders connecting the Vyvx fiber-optic television transmission system to a series of decoders ranging from commercial units to future cable television system decompression terminal equipment. Television signals will be multiplexed and distributed within the Vyvx fiber system and/or the IDB satellite system, depending on customer needs.
 Beyond simply providing compression, the system is intended to provide multiple video outputs with four CD-quality audio channels each, VBI text signals, full addressability, encryption of each channel and sub-channel and full remote system control.
 Robert McIntyre, president of Scientific-Atlanta's Transmission Systems Division, said, "Winning this order provides another example of Scientific-Atlanta's innovative technological leadership in digital video compression. We are proud to team with Vyvx and IDB, premier providers of leading edge technology, in the growing commitment to digital video compression."
 Scientific-Atlanta will demonstrate the full capabilities of its compression system at the upcoming National Association of Broadcasters (NAB) Show, booth No. 13818, in Las Vegas April 19-22.
 IDB Communications Group, Inc. operates a domestic and international communications network which provides its customers with radio and television transmission services, international private line and public long distance telephone services, facsimile and data connections and mobile satellite communications capabilities.
 Scientific-Atlanta is a world leader in broadband communications systems, cable television electronics, satellite-based communications networks and instrumentation for industrial, government and telecommunications networks.
 Vyvx is the first company to provide switched contribution-quality fiber-optic television transmission services to ABC, CBS, CNN, Fox, NBC and numerous other television and cable networks as well as production companies nationwide.
 WilTel owns and operates one of only four nationwide fiber-optic networks in the United States and is the only nationwide fiber-optic network dedicated primarily to business communications services. The WilTel network has access to more than 30,000 system miles.
 WilTel is one of The Williams Companies, Inc., a $5 billion corporation headquartered in Tulsa, Okla., that provides energy transportation and nationwide digital telecommunications. Williams is listed on the New York and Pacific stock exchanges (symbol WMB).
 -0- 4/16/93
 /CONTACT: Kevin Inda of Wiltel, 713-547-1014, Lori Gutknecht of IDB Communications, 213-240-3758, or Bill Brobst of Scientific-Atlanta, 404-903-6306/
 (WMB IDBX)


CO: Vyvx, Inc. ST: Oklahoma IN: CPR SU:

PS -- NY032 -- 6735 04/16/93 11:52 EDT
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Date:Apr 16, 1993
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