Aimilios Chalamandaris

Also published as: A. Chalamandaris, Chalamandaris Aimilios


Using Audio Books for Training a Text-to-Speech System
Aimilios Chalamandaris | Pirros Tsiakoulis | Sotiris Karabetsos | Spyros Raptis
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

Creating new voices for a TTS system often requires a costly procedure of designing and recording an audio corpus, a time consuming and effort intensive task. Using publicly available audiobooks as the raw material of a spoken corpus for such systems creates new perspectives regarding the possibility of creating new synthetic voices quickly and with limited effort. This paper addresses the issue of creating new synthetic voices based on audiobook data in an automated method. As an audiobook includes several types of speech, such as narration, character playing etc., special care is given in identifying the data subset that leads to a more neutral and general purpose synthetic voice. The main goal is to identify and address the effect the audiobook speech diversity on the resulting TTS system. Along with the methodology for coping with this diversity in the speech data, we also describe a set of experiments performed in order to investigate the efficiency of different approaches for automatic data pruning. Further plans for exploiting the diversity of the speech incorporated in an audiobook are also described in the final section and conclusions are drawn.


All Greek to me! An automatic Greeklish to Greek transliteration system
Aimilios Chalamandaris | Athanassios Protopapas | Pirros Tsiakoulis | Spyros Raptis
Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC’06)

This paper presents research on “Greeklish,” that is, a transliteration of Greek using the Latin alphabet, which is used frequently in Greek e-mail communication. Greeklish is not standardized and there are a number of competing conventions co-existing in communication, based on personal preferences regarding similarities between Greek and Latin letters in shape, sound, or keyboard position. Our research has led to the development of “All Greek to me!” the first automatic transliteration system that can cope with any type of Greeklish. In this paper we first present previous research on Greeklish, describing other approaches that have attempted to deal with the same problems. We then provide a brief description of our approach, illustrating the functional flowchart of our system and the main ideas that underlie it. We present measures of system performance, based on about a year’s worth of usage as a public web service, and preliminary research, based on the same corpus, on the use of Greeklish and the trends in preferred Latin-Greek letter mapping. We evaluate the consistency of different transliteration patterns among users as well as the within-user consistency based on coherent principles. Finally we outline planned future research to further understand the use of Greeklish and improve “All Greek to me!” to function reliably embedded in integrated communication platforms bridging e-mail to mobile telephony and ubiquitous connectivity.

Language identification from suprasegmental cues: Speech synthesis of Greek utterances from different dialectal variations.
Dimou Athanassia Lida | Chalamandaris Aimilios
Proceedings of the Fifth International Conference on Language Resources and Evaluation (LREC’06)

In this paper we present the continuation of our research on the ability of native Greek adults to identify their mother tongue from synthesized stimuli which contain only prosodic - melodic and rhythmic - information. In the first section we present the ideas that underlie our theory, together with a brief review of our preliminary results. In the second section the detailed description of our experimental approach is given, as well as the results and their statistical analysis. In the final two sections we provide the conclusions derived from our experiments and the future work we are planning to carry out.


Bypassing Greeklish!
A. Chalamandaris | P. Tsiakoulis | S. Raptis | G. Giannopoulos | G. Carayannis
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)