Patent ID: 8218691

Claim:
A time information receiver which receives a standard radio wave containing a time code in which data pulses are arranged at a predetermined period, and analyzes the time code from a demodulated signal of the standard radio wave, the time information receiver comprising: a determining section for determining rising points and falling points of the demodulated signal; a first calculator for calculating a plurality of first differences, each of which is a difference between (i) a time interval between any pair of the rising points determined by the determining section and (ii) a time period of the predetermined period, and calculating a rising dispersion amount representing a degree of dispersion of the plurality of first differences; a second calculator for calculating a plurality of second differences, each of which is a difference between (i) a time interval between any pair of the falling points determined by the determining section and (ii) a time period of the predetermined period, and calculating a falling dispersion amount representing a degree of dispersion of the plurality of second differences; a comparison section for comparing the rising dispersion amount and the falling dispersion amount; and a judger for judging a code type of the time code contained in the received standard radio wave on the basis of a comparison result of the comparison section, wherein: the first calculator calculates the plurality of first differences such that each of the first differences is a difference between (i) a time interval between any two adjacent rising points determined by the determining section and (ii) the predetermined period, and calculates the rising dispersion amount based on the plurality of first differences; and the second calculator calculates the plurality of second differences such that each of the second differences is a difference between (i) a time interval between any two adjacent falling points determined by the determining section and (ii) the predetermined period, and calculates the falling dispersion amount based on the plurality of second differences.