PURPOSE: To make the size small by decreasing number of pins of a signal processing circuit using the picture processing integrated memory circuit.

CONSTITUTION: A picture element value of a picture equivalent to two frames is stored in a memory cell 12 and it is read based on an address of a 2-dimension block given from address controllers 13A, 13B. The picture elements in the block of two read pictures are added adaptively at a proper ratio by an adder means 20 and an inter-picture prediction signal and an interpolation signal obtained from the result are outputted externally from a data output terminal 11.