| 摘要 |
A discriminating apparatus for digital audio broadcasting according to the present invention includes a delay means for delaying an input signal by a time corresponding to a period of an effective symbol in a symbol, a correlation means for judging whether any correlation exists or not between the input signal and a delayed signal from the delay means, a moving average means for calculating a moving average of an output of the correlation means in a period corresponding to a guard interval in the symbol, and a comparing means for comparing an output of the moving average means with a threshold level. It is determined based on an output of the comparing means whether or not the input signal is a digital audio broadcasting signal.
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