An information processing apparatus is provided which includes a buffer for holding image data output line by line from an image pickup device, a write enable generator for generating a write enable signal which indicates a timing by which the image data is written to the buffer line by line, an adder for adding per reference clock a read frequency set value which determines readout frequency of the image data written in the buffer, and a write enable generator for generating a read enable signal which indicates a timing by which the image data written in the buffer is read out line by line based on an added value of the read frequency set values.