**Commenced**in January 2007

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**Edition:**International

**Paper Count:**30517

##### A New Time-Frequency Speech Analysis Approach Based On Adaptive Fourier Decomposition

**Authors:**
Liming Zhang

**Abstract:**

In this paper, a new adaptive Fourier decomposition (AFD) based time-frequency speech analysis approach is proposed. Given the fact that the fundamental frequency of speech signals often undergo fluctuation, the classical short-time Fourier transform (STFT) based spectrogram analysis suffers from the difficulty of window size selection. AFD is a newly developed signal decomposition theory. It is designed to deal with time-varying non-stationary signals. Its outstanding characteristic is to provide instantaneous frequency for each decomposed component, so the time-frequency analysis becomes easier. Experiments are conducted based on the sample sentence in TIMIT Acoustic-Phonetic Continuous Speech Corpus. The results show that the AFD based time-frequency distribution outperforms the STFT based one.

**Keywords:**
speech analysis,
Adaptive Fourier decomposition,
instantaneous
frequency,
time-frequency distribution

**Digital Object Identifier (DOI):**
doi.org/10.5281/zenodo.1087404

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1 (Retrieved on 27/11/2012)