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In recent years there has been a substantial debate about the need for increasingly spontaneous, conversational corpora of spoken interaction that are not controlled or task directed. In parallel the need has arisen for the recording of multi-modal corpora which are not restricted to the audio domain alone. With a corpus that would fulfill both needs, it(More)
This paper describes a new open source architecture for unit-selection based speech synthesis called BOSS (Bonn Open Synthesis System). It is built up modularly, with communications between modules taking place in a fixed format. This makes the addition, deletion and substitution of modules very easy. The strict separation between data and algorithms allows(More)
We report on the functional and timing relations between head movements and the overlapping verbal-vocal feedback expressions. We investigate the effect of a distraction task on head gesture behaviour and the co-occurring verbal feedback. The results show that head movements overlapping with verbal expressions in a distraction task differ in terms of(More)
In order to address basic mechanisms behind a reduced averaged P300 wave in schizophrenia and depression, 17 unmedicated schizophrenic and 11 unmedicated depressive subjects were tested in an 'oddball paradigm' against healthy controls matched for gender and age. The amplitude distributions of single trials' maximum positive deflections after stimulation(More)
The aim of the present paper was to perform a single trial analysis of event-related potentials in order to elucidate the mechanisms behind a reduced P300 amplitude occurring in unmedicated depressives (n = 11) and schizophrenics (n = 18). For this purpose, tools from linear system theory were applied to single trials in an oddball paradigm. This analysis(More)
Verbmobil is a speaker-independent system that offers translation assistance in dialogue situations. In cooperation with other institutes we are developing the speech synthesis module within Verbmobil for German and American English. Current priority is given to an enhancement of naturalness of our PSOLA based concatenative synthesis of German. Due to a(More)
A single trial analysis of event-related potentials (auditory odd-ball paradigm) of 20 schizophrenics was performed in comparison to matched healthy controls. The purpose of the study was to test the hypothesis that in schizophrenia the well-known P300 amplitude reduction of averaged event-related potentials is due to fewer elicited single trial P300 waves.(More)