Patent ID: 7929381

Claim:
A time information obtaining apparatus comprising: a receiving unit for receiving a standard time radio wave; an input waveform data obtaining unit for sampling a signal that includes a time code output from the receiving unit at a predetermined sampling period to obtain input waveform data having a unit time length, wherein the input waveform data at each sampling point is given by a value expressed in plural bits and the unit time length is a time corresponding to one code composing the time code; an accumulating unit for accumulating the input waveform data; a position calculating unit for calculating a reference position, which is a position on a time axis which shows a minimum value or a maximum value of the input waveform data accumulated by the accumulating unit, and a maximum gradient position, which is a position on the time axis where a difference between values of the accumulated input waveform data at adjacent sampling points is maximum; and a controlling unit for calculating, based on the reference position and the maximum gradient position, a leading position of a unit time of the signal including the time code, between the reference position and the maximum gradient position.