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Signal analyzing method, signal synthesizing method of complex exponential modulation filter bank, program thereof and recording medium thereof
Signal analyzing method, signal synthesizing method of complex exponential modulation filter bank, program thereof and recording medium thereof
Provided is a complex exponential modulation filter bank which can reduce quantity of arithmetic operation, and can realize low electric power consumption or speeding-up. This complex exponential modulation filter bank has a step of calculating a first intermediate signal from an input signal, a step of calculating a second intermediate signal from the first intermediate signal, a step of calculating a third intermediate signal from the second intermediate signal with fast Fourier transform, and a step of calculating a complex band output signal from the third intermediate signal.
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