[20060215]RS22217_数字电视转型：简要概述.pdf

1 Detailed information on these topics is available in CRS Report RL31260, Digital Televison:(continued.)Congressional Research Service The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code RS22217Updated February 15, 2006 The Digital TV Transition: A Brief Overviewname redactedSpecialist in Science and TechnologyResources, Science, and Industry Divisionname redactedAnalyst in Telecommunications and Technology PolicyResources, Science, and Industry DivisionSummaryDuring the first session of the 109th Congress, policymakers sought to acceleratethe nations transition to digital television and to expedite the transfer of radio frequencychannels from the broadcast industry to public safety and commercial users no later than2009. Broadcasters are holding spectrum in the 700 megahertz (MHZ) band (channels52-69) that they would be required to relinquish after the transition to digital television(DTV) is achieved. Without a hard deadline, the transition to digital television has beenpostponed. Meanwhile, public safety officials want 700 MHZ spectrum that has beenassigned to them, but not delivered, in order to build new interoperable networks, whilethe commer