TurboBias 2.0: Streaming Context-Biasing for Production-Efficient ASR Systems
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Electrical Engineering and Systems Science > Audio and Speech Processing
arXiv:2608.21343 (eess)
[Submitted on 21 Aug 2026]
Title:TurboBias 2.0: Streaming Context-Biasing for Production-Efficient ASR Systems
Authors:Vladimir Bataev, Lilit Grigoryan, Andrei Andrusenko, Nikolay Karpov, Vitaly Lavrukhin, Boris Ginsburg
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Abstract:Contextualization is essential for production automatic speech recognition (ASR) systems, where user-provided phrases must be recognized accurately under strict latency constraints. Although many context-biasing methods improve recognition accuracy, they often do not address the practical requirements of modern production ASR systems: streaming inference, efficient batched decoding, user-specific context lists, and low runtime overhead. We propose TurboBias 2.0, a production-oriented framework for efficient phrase boosting in Transducer-based ASR systems. The framework extends GPU-accelerated TurboBias with a case-insensitive boosting graph and per-stream batched decoding, allowing each utterance in a batch to use an independent context-biasing configuration. This enables personalized context biasing for multiple simultaneous users without sharing or mixing their context lists. The proposed framework supports both offline and streaming inference and can be used with greedy and beam-search decoding. Experiments show that TurboBias 2.0 improves contextual phrase recognition while preserving low latency and high throughput.
| Subjects: | Audio and Speech Processing (eess.AS); Artificial Intelligence (cs.AI); Computation and Language (cs.CL); Machine Learning (cs.LG); Sound (cs.SD) |
| Cite as: | arXiv:2608.21343 [eess.AS] |
| (or arXiv:2608.21343v1 [eess.AS] for this version) | |
| https://doi.org/10.48550/arXiv.2608.21343
arXiv-issued DOI via DataCite (pending registration)
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View a PDF of the paper titled TurboBias 2.0: Streaming Context-Biasing for Production-Efficient ASR Systems, by Vladimir Bataev and 5 other authors
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