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eess.AS2025

Scaling Multi-Talker ASR with Speaker-Agnostic Activity Streams

Xiluo He, Alexander Polok, Jesús Villalba +2

An increasingly common training paradigm for multi-talker automatic speech recognition (ASR) is to use speaker activity signals to adapt single-speaker ASR models for overlapping s…

eess.AS2025

Adapting Diarization-Conditioned Whisper for End-to-End Multi-Talker Speech Recognition

Martin Kocour, Martin Karafiat, Alexander Polok +3

We propose a speaker-attributed (SA) Whisper-based model for multi-talker speech recognition that combines target-speaker modeling with serialized output training (SOT). Our approa…

cs.CL2025

CS-FLEURS: A Massively Multilingual and Code-Switched Speech Dataset

Brian Yan, Injy Hamed, Shuichiro Shimizu +24

We present CS-FLEURS, a new dataset for developing and evaluating code-switched speech recognition and translation systems beyond high-resourced languages. CS-FLEURS consists of 4…

eess.AS2025

DeCRED: Decoder-Centric Regularization for Encoder-Decoder Based Speech Recognition

Alexander Polok, Santosh Kesiraju, Karel Beneš +3

This paper presents a simple yet effective regularization for the internal language model induced by the decoder in encoder-decoder ASR models, thereby improving robustness and gen…

eess.AS2025

BUT System for the MLC-SLM Challenge

Alexander Polok, Jiangyu Han, Dominik Klement +3

We present a two-speaker automatic speech recognition (ASR) system that combines DiCoW -- a diarization-conditioned variant of Whisper -- with DiariZen, a diarization pipeline buil…