Simultaneous Translation with Offline Speech and LLM Models in CUNI Submission to IWSLT 2025

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511623" target="_blank" >RIV/00216208:11320/25:10511623 - isvavai.cz</a>

Result on the web

<a href="https://aclanthology.org/2025.iwslt-1.41.pdf" target="_blank" >https://aclanthology.org/2025.iwslt-1.41.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Simultaneous Translation with Offline Speech and LLM Models in CUNI Submission to IWSLT 2025

Original language description

This paper describes Charles University sub- mission to the Simultaneous Speech Transla- tion Task of the IWSLT 2025. We cover all four language pairs with a direct or cascade ap- proach. The backbone of our systems is the of- fline Whisper speech model, which we use for both translation and transcription in simultane- ous mode with the state-of-the-art simultaneous policy AlignAtt. We further improve the per- formance by prompting to inject in-domain ter- minology, and we accommodate context. Our cascaded systems further use EuroLLM for un- bounded simultaneous translation. Compared to the Organizers’ baseline, our systems im- prove by 2 BLEU points on Czech to English and 13-22 BLEU points on English to German, Chinese and Japanese on the development sets. Additionally, we also propose a new enhanced measure of speech recognition latency.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

<a href="/en/project/EH23_020%2F0008518" target="_blank" >EH23_020/0008518: Linguistics, Artificial Intelligence and Language and Speech Technologies: from Research to Applications</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 22nd International Conference on Spoken Language Translation (IWSLT 2025)

ISBN

979-8-89176-272-5

ISSN

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e-ISSN

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Number of pages

10

Pages from-to

389-398

Publisher name

Association for Computational Linguistics

Place of publication

Kerrville, TX, USA

Event location

Wien, Austria

Event date

Jul 31, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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