Time information obtaining apparatus and radio wave timepiece

A time information obtaining apparatus, comprising:

• a receiving section for receiving a standard time radio wave;
• an input waveform data generating section for sampling a signal including a time code output from the receiving section at a predetermined sampling period to obtain sampling points every one unit time length corresponding to one code constituting the time code, each of the sampling points being a value expressed by a plurality of bits, and generating input waveform data having one or more unit time lengths based on data having at least one of the unit time lengths each including the obtained sampling points;
• a predicted waveform data generating section for generating a plurality of pieces of predicted waveform data, each sampling point of which is a value expressed by a plurality of bits, the predicted waveform data having a same time length as that of the input waveform data, the predicted waveform data being waveform data having one or more unit time lengths representing each of classes of standard time radio waves with respect to each class of the standard time radio wave, and starting positions of the waveform data being shifted from each other in order;
• a correlation value calculating section for calculating correlation values between the input waveform data and the plurality of pieces of predicted waveform data of each of the classes;
• a correlation value comparing section for comparing the correlation values calculated by the correlation value calculating section to one another to calculate an optimum value of the correlation values of each of the classes;
• and
• a judging section for judging the class of the standard time wave based on the optimum value of each of the classes,
• wherein the judging section judges a position corresponding to a starting position of the code constituting the time code in the predicted waveform data to be a second starting position based on the predicted waveform data indicating the optimum value with regard to the judged class.