| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital broadcasting transmission and reception technique which receive a signal in an excellent state even if a receiving environment is much inferior to that of fixed reception such as partial reception. SOLUTION: In terrestrial digital broadcasting, 13 segments are be divided into three hierarchies: an A hierarchy, a B hierarchy and a C hierarchy, and one segment at a central part is allocated to a partial reception hierarchy (A hierarchy) for a portable receiver. In such digital broadcasting composed of a plurality of segments, signals other than a partial hierarchy that may usually be multiplexed are not multiplexed on a segment but signals of a partial hierarchy are multiplexed on a plurality of segments to be transmitted. A side that receives the partial hierarchy performs reception with a selection diversity system for selecting a segment with the best receiving state among segments with the signals of a partial hierarchy multiplexed thereon. Otherwise, the receiving side performs reception with a combination diversity system for combining signals of a plurality of segments with the signals of a partial hierarchy multiplexed thereon to receive the combined signal. COPYRIGHT: (C)2006,JPO&NCIPI
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