An information processing apparatus capable of receiving and processing a variety of types of input is shown with features that make it easy to add properly synchronized information as desired. A CCD photoelectrically converts into image signals the light of objects collected by a photographic lens. The image signals of the photographic images are digitized by an analog/digital (A/D) conversion circuit, and are compressed by a digital signal processor (DSP). A central processing unit (CPU) records on a memory card the photographic images along with their input date and time as header information. When sound information is received through a microphone during reproduction of the photographic images, the CPU 34 records on the memory card the sound information along with the input date and time header information of the photographic images.