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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...
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...
The speech transmission index (STI) is an objective measurement that is used to assess the quality of speech transmission as well as listening difficulty in room acoustics. This paper proposes a specified method of blindly estimating the STI from observed reverberant speech signals, based on the concept of the modulation transfer function. The proposed method has been developed from a simplified method...
There have recently been serious social issues involved in multimedia signal processing such as malicious attacks and tampering with digital audio/speech signals. Fragile speech watermarking is a technique that enables the detection of tampering with the original signals. We previously proposed an inaudible digital-audio watermarking approach based on cochlear delay. We investigated how the proposed...
This paper proposes an audio-data hiding scheme for amplitude-modulation (AM) radio broadcasting systems. The digital-audio method of watermarking based on cochlear delay (CD) that we previously proposed is employed in this scheme to send an inaudible message. We investigate the feasibility of a data-hiding scheme in the AM domain by applying the method of CD-based inaudible watermarking. The proposed...
There have recently been serious social issues involved in multimedia signal processing such as digital rights management, secure authentication, malicious attacks, and tampering with digital audio/speech signals. Reversible watermarking is a technique that enables these signals to be authenticated and then restored to their original signals by removing watermarks from them. We previously proposed...
We investigated how the proposed approach with inaudible digital-audio watermarking based on cochlear delay (CD) could be implemented to produce an efficient architecture to further reduce embedding limitations. We also improved our approach by controlling parameter b for time varying CD filters and designing a cascade architecture for these filters. The results revealed that the improved method could...
The alternation of sounds in the left and right ears induces motion perception of a static visual stimulus (SIVM: Sound-Induced Visual Motion). In this case, binaural cues were of considerable benefit in perceiving locations and movements of the sounds. The present study investigated how a spectral cue – another important cue for sound localization and motion perception – contributed to the SIVM....
We investigated the perception of temporal patterns of two neighboring empty time intervals, t 1 and t 2 , in this order. In a previous study, we reported that bilateral assimilation took place during t 1 and t 2 , as well as unilateral assimilation. [Miyauchi, R. & Nakajima, Y. (2005). Bilateral assimilation of two neighboring empty time intervals. Music Perception,...
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