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Topic: Spectrogram, Cepstrum and Mel-Frequency Analysis

Speech Technology - Kishore Prahallad Technology: A Practical IntroductionTopic: Spectrogram, Cepstrum and Mel-Frequency AnalysisKishore PrahalladEmail: Mellon University&International Institute of Information Technology HyderabadSpeech Technology - Kishore Prahallad Spectrogram Cepstrum Mel-Frequency Analysis Mel-Frequency Cepstral CoefficientsSpeech Technology - Kishore Prahallad Technology - Kishore Prahallad signal represented as a sequence of spectral vectorsFFTFFTFFTS pectrumSpeech Technology - Kishore Prahallad signal represented as a sequence of spectral vectorsFFTS pectrumFFTFFTFFTFFTFFTFFTFFTFFTFFTFFTFFT FFTFFTS peech Technology - Kishore Prahallad signal represented as a sequence of spectral Technology - Kishore Prahallad

sine wave with 4 cycles per sec. Gives a peak at 4 Hz in frequency axis. Speech Technology - Kishore Prahallad (skishore@cs.cmu.edu) 29 Play a Mathematical Trick Spectral Envelope Spectrum Spectral details A pseudo-frequency axis Low Freq. region High Freq. region IFFT Treat this as a sine wave with 4 cycles per sec. Gives a peak

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