发明名称 Signal Processing Apparatus, Signal Processing Method, and Program Therefor
摘要 A signal processing apparatus subjects an audio signal to musical pitch analysis using different analysis techniques for the higher and lower frequencies. When an audio signal is input, a first extractor extracts a high-frequency signal, and a second extractor extracts a low-frequency signal from the audio signal. A high-frequency processor extracts pitch components from the high-frequency signal by applying the short-time Fourier transform. A low-frequency processor extracts pitch components from the low-frequency signal by dividing the low-frequency signal into a plurality of octave components. A synthesizing unit then combines the pitch components thus extracted from the high-frequency signal and the low-frequency signal and outputs the analysis result.
申请公布号 US2009093896(A1) 申请公布日期 2009.04.09
申请号 US20080245067 申请日期 2008.10.03
申请人 KOBAYASHI YOSHIYUKI 发明人 KOBAYASHI YOSHIYUKI
分类号 G06F17/00 主分类号 G06F17/00
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