Publications
2007
Karpouzis, K; Caridakis, George; Fotinea, Stavroula-Evita; Efthimiou, Eleni
Educational resources and implementation of a Greek sign language synthesis architecture Journal Article
In: Computers & Education, vol. 49, no. 1, pp. 54-74, 2007, ISSN: 0360-1315, (Web3D Technologies in Learning, Education and Training).
@article{Karpouzis2007,
title = {Educational resources and implementation of a Greek sign language synthesis architecture},
author = {K Karpouzis and George Caridakis and Stavroula-Evita Fotinea and Eleni Efthimiou},
url = {http://www.sciencedirect.com/science/article/B6VCJ-4H4V6WF-1/2/7485593c58f51483c6da1d049922c501},
doi = {DOI: 10.1016/j.compedu.2005.06.004},
issn = {0360-1315},
year = {2007},
date = {2007-01-01},
journal = {Computers & Education},
volume = {49},
number = {1},
pages = {54-74},
abstract = {In this paper, we present how creation and dynamic synthesis of linguistic resources of Greek Sign Language (GSL) may serve to support development and provide content to an educational multitask platform for the teaching of GSL in early elementary school classes. The presented system utilizes standard virtual character (VC) animation technologies for the synthesis of sign sequences/streams, exploiting digital linguistic resources of both lexicon and grammar of GSL. Input to the system is written Greek text, which is transformed into GSL and animated on screen. To achieve this, a syntactic parser decodes the structural patterns of written Greek and matches them into equivalent patterns of GSL, which are then signed by a VC. The adopted notation system for the representation of GSL phonology incorporated in the system's lexical knowledge database, is Hamburg Notation System (HamNoSys). For the implementation of the virtual signer tool, the definition of the VC follows the h-anim standard and is implemented in a web browser using a standard VRML plug-in.},
note = {Web3D Technologies in Learning, Education and Training},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, we present how creation and dynamic synthesis of linguistic resources of Greek Sign Language (GSL) may serve to support development and provide content to an educational multitask platform for the teaching of GSL in early elementary school classes. The presented system utilizes standard virtual character (VC) animation technologies for the synthesis of sign sequences/streams, exploiting digital linguistic resources of both lexicon and grammar of GSL. Input to the system is written Greek text, which is transformed into GSL and animated on screen. To achieve this, a syntactic parser decodes the structural patterns of written Greek and matches them into equivalent patterns of GSL, which are then signed by a VC. The adopted notation system for the representation of GSL phonology incorporated in the system's lexical knowledge database, is Hamburg Notation System (HamNoSys). For the implementation of the virtual signer tool, the definition of the VC follows the h-anim standard and is implemented in a web browser using a standard VRML plug-in.
2005
Caridakis, George; Karpouzis, K; Sapountzaki, Galini; Fotinea, Stavroula-Evita; Efthimiou, Eleni
A dynamic environment for Greek Sign Language Synthesis using virtual characters Proceedings Article
In: Proc. of the Web3D 2005 Symposium, Workshop on Education and Training, Bangor, UK, 2005.
@inproceedings{Caridakis_et_al2005,
title = {A dynamic environment for Greek Sign Language Synthesis using virtual characters},
author = {George Caridakis and K Karpouzis and Galini Sapountzaki and Stavroula-Evita Fotinea and Eleni Efthimiou},
url = {https://www.academia.edu/15299292/A_dynamic_environment_for_Greek_Sign_Language_Synthesis_using_virtual_characters},
year = {2005},
date = {2005-03-01},
booktitle = {Proc. of the Web3D 2005 Symposium, Workshop on Education and Training},
address = {Bangor, UK},
abstract = {In this paper, we present a system that performs sign language synthesis in the framework of an educational platform for young deaf children. The proposed architecture is based on standardized virtual character animation concepts for the synthesis of sign sequences and lexicon-grammatical processing of Greek sign language (GSL) sequences. A major advantage of the proposed architecture is that it goes beyond the usual single-word approach which is linguistically incorrect, to provide tools to dynamically construct new sign representations from similar ones. Words and phrases are being processed and the resulting notation subset of a lexical database, HamNoSys (Hamburg Notation System), eventually transformed into GSL and animated on the clients’ side via an h-anim compliant avatar.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper, we present a system that performs sign language synthesis in the framework of an educational platform for young deaf children. The proposed architecture is based on standardized virtual character animation concepts for the synthesis of sign sequences and lexicon-grammatical processing of Greek sign language (GSL) sequences. A major advantage of the proposed architecture is that it goes beyond the usual single-word approach which is linguistically incorrect, to provide tools to dynamically construct new sign representations from similar ones. Words and phrases are being processed and the resulting notation subset of a lexical database, HamNoSys (Hamburg Notation System), eventually transformed into GSL and animated on the clients’ side via an h-anim compliant avatar.
Fotinea, Stavroula-Evita; Efthimiou, Eleni; Karpouzis, K; Caridakis, George
Dynamic GSL synthesis to support access to e-content Proceedings Article
In: Proc. of the 3rd International Conference on Universal Access in Human-Computer Interaction (UAHCI 2005), Las Vegas, Nevada, USA, 2005.
@inproceedings{Fotietal2005,
title = {Dynamic GSL synthesis to support access to e-content},
author = {Stavroula-Evita Fotinea and Eleni Efthimiou and K Karpouzis and George Caridakis},
url = {https://www.semanticscholar.org/paper/Dynamic-GSL-synthesis-to-support-access-to-Fotinea-Efthimiou/57a3300308fafa59b65290d7e1d05b66dcaca470},
year = {2005},
date = {2005-07-01},
booktitle = {Proc. of the 3rd International Conference on Universal Access in Human-Computer Interaction (UAHCI 2005)},
address = {Las Vegas, Nevada, USA},
abstract = {This paper presents the modules that comprise a sign generation tool for Greek Sign Language (GSL). The tool combines Natural Language (NL) knowledge with avatar technology in order to allow for unrestricted generation of sign utterances. The NL knowledge of the system is exploited in the context of typical NLP procedures, which involve syntactic parsing of linguistic strings as well as structure and lexicon mapping according to standard Machine Translation (MT) practices. The coding on linguistic strings which are relevant to GSL, provide instructions for the motion of a Virtual Reality Modeling Language (VRML) signer, that performs the corresponding sign streams. Dynamic synthesis of GSL linguistic units, is achieved by combining syntactic rules of the language with a lexicon that contains lemmas coded as to features of GSL phonology. This approach, although sublanguage oriented as regards our current implementation, allows for unrestricted conversion capacity of written Greek to GSL, which is an essential prerequisite for access to e-content by the community of native GSL signers.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper presents the modules that comprise a sign generation tool for Greek Sign Language (GSL). The tool combines Natural Language (NL) knowledge with avatar technology in order to allow for unrestricted generation of sign utterances. The NL knowledge of the system is exploited in the context of typical NLP procedures, which involve syntactic parsing of linguistic strings as well as structure and lexicon mapping according to standard Machine Translation (MT) practices. The coding on linguistic strings which are relevant to GSL, provide instructions for the motion of a Virtual Reality Modeling Language (VRML) signer, that performs the corresponding sign streams. Dynamic synthesis of GSL linguistic units, is achieved by combining syntactic rules of the language with a lexicon that contains lemmas coded as to features of GSL phonology. This approach, although sublanguage oriented as regards our current implementation, allows for unrestricted conversion capacity of written Greek to GSL, which is an essential prerequisite for access to e-content by the community of native GSL signers.