Patent ID: 8379490
Filing Date: 2013-02-19
Classification: G04R

Abstract:
1. A time information-acquiring apparatus comprising: a receiver configured to receive a standard time radio wave including a time code; an input waveform generator configured to sample a signal output from the receiver and including the time code with a predetermined sampling period and to generate input waveform data with one or more unit time lengths, the input waveform data at each sampling point having one of a first value indicating a low level and a second value indicating a high level, the input waveform data within a first characteristic section having a predetermined value unique to codes forming time information included in the time code; an accumulator configured to accumulate the predetermined value of the input waveform data during the first characteristic section and to store an accumulated value; a calculator configured to perform an arithmetic calculation for the accumulated value stored by the accumulator and characteristic values, which are one of the first value and the second value, of the first characteristic section of the codes forming the time information included in the time code, and to calculate correlation values between the input waveform data and the codes forming the time information based on a result of the arithmetic calculation; a comparator configured to compare the correlation values calculated by the calculator and to determine an optimal value of the correlation values; and a controller configured to acquire the time information included in the time code based on a code related to the optimal value.