Abstract: An analog signal is stored in an analog memory device, while lower bits of a digital signal obtained by digitizing the analog signal is stored in a digital memory device. An analog signal reproduced from the analog memory device is corrected on the basis of a digital signal reproduced from the digital memory device. The corrected reproduced signal is stored in the memory device again, whereby a recursive storage system is constructed. A signal component degraded by noise in the analog storage is corrected with the digital signal, with the result that storage and reproduction of favorable signal-to-noise ratio are realized.