Concatenative Synthesis for Brazilian Sign Language

Gustavo Borba da Silva; Ângelo Brandão Benetti; José Mario De Martino

doi:10.5753/stil.2026.29829

Concatenative Synthesis for Brazilian Sign Language

Gustavo Borba da Silva, Ângelo Brandão Benetti, José Mario De Martino

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Abstract

This paper presents an enhanced concatenative synthesis framework for Brazilian Sign Language (Libras) based on motion-capture (MoCap) data. The proposed method extends previous work by incorporating movement dynamics into the unit-selection process, allowing fragment selection to consider both pose similarity and velocity continuity. In addition, a quaternion-based transition smoothing mechanism is introduced to reduce discontinuities between independently recorded sign segments. The framework also employs a compact quaternion-only motion representation and a web-native architecture for real-time synthesis and visualization.

Anthology ID:: 2026.stil-1.60
Volume:: Proceedings of the 17th Brazilian Symposium in Information and Human Language Technology
Month:: October
Year:: 2026
Address:: Cuiabá, Mato Grosso, Brazil
Editors:: Bryan Khelven da Silva Barbosa, Aline Paes, Ariani Di Felippo
Venue:: STIL
SIG:
Publisher:: Association for Computational Linguistics
Note:
Pages:: 621–625
Language:
URL:: https://aclanthology.org/2026.stil-1.60/
DOI:: 10.5753/stil.2026.29829
Bibkey:
Cite (ACL):: Gustavo Borba da Silva, Ângelo Brandão Benetti, and José Mario De Martino. 2026. Concatenative Synthesis for Brazilian Sign Language. In Proceedings of the 17th Brazilian Symposium in Information and Human Language Technology, pages 621–625, Cuiabá, Mato Grosso, Brazil. Association for Computational Linguistics.
Cite (Informal):: Concatenative Synthesis for Brazilian Sign Language (da Silva et al., STIL 2026)
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PDF:: https://aclanthology.org/2026.stil-1.60.pdf

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@inproceedings{da-silva-etal-2026-concatenative,
    title = "Concatenative Synthesis for {B}razilian {S}ign {L}anguage",
    author = "da Silva, Gustavo Borba  and
      Benetti, {\^A}ngelo Brand{\~a}o  and
      Martino, Jos{\'e} Mario De",
    editor = "Barbosa, Bryan Khelven da Silva  and
      Paes, Aline  and
      Felippo, Ariani Di",
    booktitle = "Proceedings of the 17th {B}razilian Symposium in Information and Human Language Technology",
    month = oct,
    year = "2026",
    address = "Cuiab{\'a}, Mato Grosso, Brazil",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2026.stil-1.60/",
    doi = "10.5753/stil.2026.29829",
    pages = "621--625",
    abstract = "This paper presents an enhanced concatenative synthesis framework for Brazilian Sign Language (Libras) based on motion-capture (MoCap) data. The proposed method extends previous work by incorporating movement dynamics into the unit-selection process, allowing fragment selection to consider both pose similarity and velocity continuity. In addition, a quaternion-based transition smoothing mechanism is introduced to reduce discontinuities between independently recorded sign segments. The framework also employs a compact quaternion-only motion representation and a web-native architecture for real-time synthesis and visualization."
}

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%0 Conference Proceedings
%T Concatenative Synthesis for Brazilian Sign Language
%A da Silva, Gustavo Borba
%A Benetti, Ângelo Brandão
%A Martino, José Mario De
%Y Barbosa, Bryan Khelven da Silva
%Y Paes, Aline
%Y Felippo, Ariani Di
%S Proceedings of the 17th Brazilian Symposium in Information and Human Language Technology
%D 2026
%8 October
%I Association for Computational Linguistics
%C Cuiabá, Mato Grosso, Brazil
%F da-silva-etal-2026-concatenative
%X This paper presents an enhanced concatenative synthesis framework for Brazilian Sign Language (Libras) based on motion-capture (MoCap) data. The proposed method extends previous work by incorporating movement dynamics into the unit-selection process, allowing fragment selection to consider both pose similarity and velocity continuity. In addition, a quaternion-based transition smoothing mechanism is introduced to reduce discontinuities between independently recorded sign segments. The framework also employs a compact quaternion-only motion representation and a web-native architecture for real-time synthesis and visualization.
%R 10.5753/stil.2026.29829
%U https://aclanthology.org/2026.stil-1.60/
%U https://doi.org/10.5753/stil.2026.29829
%P 621-625

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Markdown (Informal)

[Concatenative Synthesis for Brazilian Sign Language](https://aclanthology.org/2026.stil-1.60/) (da Silva et al., STIL 2026)

Concatenative Synthesis for Brazilian Sign Language (da Silva et al., STIL 2026)

ACL

Gustavo Borba da Silva, Ângelo Brandão Benetti, and José Mario De Martino. 2026. Concatenative Synthesis for Brazilian Sign Language. In Proceedings of the 17th Brazilian Symposium in Information and Human Language Technology, pages 621–625, Cuiabá, Mato Grosso, Brazil. Association for Computational Linguistics.