an image capture unit that captures optical images and outputs a video signal corresponding to the optical images;

a microphone unit that outputs an audio signal;

a first clock generating unit that generates a first clock using a first crystal oscillator;

a second clock generating unit that generates a second clock using a second crystal oscillator;

a first sampling unit that samples the video signal using the first clock;

a second sampling unit that samples the audio signal using the second clock;

a calculating unit that calculates a correction value for adjusting a shift between the first crystal oscillator and the second crystal oscillator; and

an adjusting unit that adjust a driving timing of the image capture unit using the correction value,

wherein the calculating unit calculates the correction value using a VSYNC pulse and a third clock, and

wherein the VSYNC pulse is synchronized with a vertical synchronization signal, and the third clock is used to count one period of the vertical synchronization signal.