Title :
Demodulators for AM-FM models of speech signals: a comparison
Author :
Lu, Shun ; Doerschuk, Peter C.
Author_Institution :
Comsat, Clarksburg, MD, USA
Abstract :
We compare two approaches, DESA-1 based on Teager´s (1980) energy operator and MBDA based on statistical nonlinear filtering, for extracting the modulating signals from jointly amplitude (AM) and frequency (FM) modulated waveforms. Both demonstrate the structure within a pitch period of a speech signal. The DESA-1 estimates tend to be smoother while the MBDA estimates tend to perform better in the presence of noise
Keywords :
amplitude modulation; demodulation; demodulators; filtering theory; nonlinear filters; phase modulation; speech processing; statistical analysis; AM-FM models; MBDA; Teager energy operator; amplitude modulated waveforms; frequency modulated waveforms; modulating signals extraction; noise; pitch period; speech signals; statistical nonlinear filtering; Additive noise; Amplitude modulation; Band pass filters; Bandwidth; Demodulation; Drives; Frequency modulation; Noise measurement; Power engineering and energy; Speech;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.540408
