Following its successful implementation in satellite and cable systems, digital transmission of TV signals is now also making its entry into terrestrial networks. Besides efficient data compression and flexible multiplexing in line with MPEG2 standards, single-frequency networks (SFNs) allow the best possible utilization of scarce terrestrial frequencies. Such networks are controlled by MIPs (megaframe initialization packets). Prerequisites for the working of an SFN are correct MIP generation and transmission plus continuous monitoring to avoid malfunctions or network failures.
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