Full band interframe picture coding system

An interframe coding system for ATM networks, which assigns large moving area's signals to higher priority packets and small moving area's signals to lower priority packets, is described. The coding system takes as much advantage as possible of interframe correlation not only at normal coding state but also after cell loss occurred, by using two frame memories FM1 and FM2. FM1 stores full reconstructed video signals including small moving areas and its output signals are used at only normal coding state as interframe prediction signals. FM2 stores reconstructed video signals only large moving areas and its output signals are used at both normal coding state and after cell loss occurred as interframe prediction signals.