In an ATM exchange, a cell transmission control section transmits an ATM cell to a transmission path of an ATM network A traffic monitor monitors traffic of the cell transmissions. Further, in that case, it is preferable that the solder bump having large volume should be soldered earlier than other solder bumps. On the first network access platform an inter-platform communication application is installed that is adapted to control signalling between the first functional component and the second functional component. The reactive circuit produces a control signal according to a voltage signal output by the voltage amplifying and comparing circuit. The predictive motion vector setting unit 523 sets the motion vector of a block on a higher layer as the predictive motion vector.