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Cochlear implant (CI) listeners were found to have great difficulty with vocal emotion recognition because of the limited spectral cues provided by CI devices. Previous studies have shown that the modulation spectral features of temporal envelopes may be important cues for vocal emotion recognition of noise-vocoded speech (NVS) as simulated CIs. In this paper, the feasibility of vocal emotion conversion...
This paper reports the feasibility of estimating the direction of arrival (DOA) using the monaural modulation spectrum (MMS). We investigated monaural cues for DOA estimation by analyzing the MMS of an observed signal in either ear on the basis of the head-related modulation transfer function (HRMTF). As a result, in the DOA estimation for azimuth variations, we found that MMS shapes were approximately...
This paper proposes a method for robustly and accurately estimating fundamental frequency (F0) of the steady complex tone on the basis of an amplitude modulation/demodulation technique. It is based on the well-known mechanism of pitch perception for AM tone. The comparative results revealed that the percentage correct rates of the estimated F0s using a few recent methods (TEMPO, PHIA, and CmpCep)...
The speech transmission index (STI) is an objective measurement that is used to assess the quality of speech transmission in room acoustics. This paper proposes a simplified method of blindly estimating the STI in room acoustics based on the concept of the modulation transfer function (MTF). STI can be estimated with this method in four steps: (1) MTF is estimated in the whole band from the reverberant...
Recent methods of speech enhancement have been proposed to suppress the effects of background noise and reverberation. The effect of background noise in these methods is regarded as additive and that of reverberation is convolutive. Therefore, methods of reducing noise and dereverberation have been applied separately in tandem. We previously unified the effects of noise and reverberation in the modulation...
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