Like many current TTS systems the AT&T German text -tospeech system is based on the methods of unit selection and concatenative synthesis [1]. This paper highlights efforts to improve TTS quality by closely matching the speakers' original productions with linguistic descriptions. On the segmental level this is achieved by adjusting the speakers' individual productions to an established, general...

The development of the Greek Text-To-Speech (TTS) system by NTUA is based on the method of concatenative synthesis and follows the Bell Labs approach to this technique. Concatenative synthesis is one of the simplest methods for speech synthesis and at the same time bypasses most of the problems encountered by articulatory and formant synthesis techniques. The method relies on designing and crea...

Sub-micrometer-sized (0.33 μm) polycrystalline powders of calcium copper titanate (CCTO) were synthesized via the solgel method. Compacted calcined sintered at 900 °C/2h to obtain porous (<80% density) pellets. Subsequently, ZnO or SnO 2 pastes (∼10 μm grain size) smeared on either side pellets and 1100 °C/15 h, which yielded dense (>95% ceramics. X-ray structural investigations revealed ...

The aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20, on the coating quality and its corrosion prevention performance was investigated. Differential th...

the regulation of dopamine and serotonin synthesis in rat brain striatal synaptosomes has been studied using hplc methods. noradrenaline was shown to markedly inhibit both the synthesis of dopamine and serotonin. the response of the synaptosomes to the concentrations of noradrenaline appeared to be biphasic, a very effective inhibition occurring at low concentrations (1-5 µm) and a relatively i...

We are presenting an interactive course on speech synthesis which is designed to support the education in speech communication. In the basic section, the fundamental principles of speech synthesis are explained. To explore a complete text-to-speech (TTS) system, the user is provided with access to the Dresden Speech Synthesizer DreSS. The user may type any text, and he may observe how the syste...

The goal of this paper is to present the work carried out up to now for the development of the Greek Text-To-Speech (GRTTS) system by NTUA. The system under consideration is based on the method of concatenative synthesis and follows the Bell Labs approach to this technique. In order that the input text to the GRTTS is translated into continuous synthetic speech the following modules have alread...

Accurate estimation of segmental durations is crucial for naturalsounding text-to-speech (TTS) synthesis. This paper presents a model of vowel duration used in the Bell Labs Japanese TTS system. We describe the constraints on vowel devoicing, and effects of factors such as phone identity, surrounding phone identities, accentuation, syllabic structure, and phrasal position on the duration of bot...