Toward the closedown of terrestrial analogue TV broadcast on 24th July 2011, the construction of the terrestrial digital broadcasting relay stations is becoming the final stage, and it is still necessary for its costs to reduce further. As for mini-transmitting system, we are promoting the low-cost type using a gap filler system. We examined the advantage and the disadvantage in which introduction gap filler system as substitution of mini-transmitting system are examined, as result it became an introduction this time.
