Makoto Hiroshige

Learn More
To extract elements of prosodic features which relate to speakers' intentional control is required for speech information processing. Speech rate variation should be a "caution signal" to call listeners' attention strongly. To express and detect such "caution signals", we have proposed a new speech rate model. This model introduces two kinds of force to(More)
The variable threshold(VT), which detects the speech rate deceleration, is proposed. The VT varies dynamically depending upon the duration of previous mora in the utterance. The VT should not change rapidly because listener cannot perceive small variations of mora duration. Thus, a set of functions with time constants which decide response speed of the VT(More)
Several N-acylglucosamine derivatives of sialyl Lewis X (1-3) were prepared using a combined chemical enzymatic approach and evaluated as an inhibitor of E-selectin-mediated cellular adhesion. Compounds with aromatic functionality, 1 and 2, were found to be 3-10 times more potent than the N-acetyl derivative (14) in an ELISA E-selectin cell adhesion assay.(More)
Fundamental studies about differential limen (DL) for word-based speech rate variations in Japanese are described. In our previous study, the DLs are expressed by subtractive difference of mora duration. In this report, however, to fit the expression for various global speech rate, the DLs are expressed by variation ratio of mora duration. We carry out(More)
This paper proposes and evaluates a new direct speech transform method with waveforms from laryngectomee speech to normal speech. Most conventional speech recognition systems and speech processing systems are not able to treat laryngectomee speech with satisfactory results. One of the major causes is difficulty preparing corpora. It is very hard to record a(More)
In spontaneous conversational speech, all portions of speech do not always have high clarity. For example, the portions not having important information or the end of a sentence are not very clear. We consider that clarity of speech is controlled by F0, power, speech rate, place of articulation and so on. We consider that the clarity changes continuously,(More)