| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a compact retransmitter for broadcasting for a portable and mobile object, without requiring useless frequency allocation, with a short delay time. <P>SOLUTION: This terrestrial digital broadcast retransmitter 1 is provided with N tuner parts 200, N digital processing parts 311, an addition circuit 400 and a retransmitting part 500. Each tuner part 200 selects one channel from terrestrial digital broadcast waves of a plurality of received channels, and outputs a baseband signal equivalent to that of the channel. Each digital processing part 311 extracts only a partial reception part from 13 segments of the equivalent baseband signal by an LPF circuit 301 and arranges the partial reception part in segments when connected by a segment arrangement circuit 302. The addition circuit 400 receives the equivalent baseband signal of the partial reception part from each digital processing part 311, additively synthesizes equivalent baseband signals and retransmits a resultant signal as a terrestrial digital broadcast wave of one channel through the retransmitting part 500. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
