Dialect Identification Using Resource-Efficient Fine-Tuning Approaches

Zirui Lin; Haris Gulzar; Monnika Roslianna Busto; Akiko Masaki; Takeharu Eda; Kazuhiro Nakadai

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arXiv · 2512.02074

Dialect Identification Using Resource-Efficient Fine-Tuning Approaches

Zirui Lin·Haris Gulzar·Monnika Roslianna Busto·Akiko Masaki·Takeharu Eda·Kazuhiro Nakadai

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Abstract

Dialect Identification (DI) is a task to recognize different dialects within the same language from a speech signal. DI can help to improve the downstream speech related tasks even when speakers have a strong dialect. However, fine-tuning a speech model for tasks like DI is expensive in terms of computation cost and memory requirement. Recent studies have explored fine-tuning pre-trained speech models for tasks like DI using Parameter-Efficient Fine-Tuning (PEFT) methods, which offer parameter efficiency but limited improvement in memory efficiency and training speed. To address these challenges, we explore Memory-Efficient Fine-Tuning (MEFT) methods, originally proposed for language processing, and apply them to the general-purpose pre-trained speech model. We then comprehensively analyze the GPU memory usage and fine-tuning speed based on various MEFT methods. As a case study, we fine-tune the Whisper model to identify six Mandarin subdialects from the KeSpeech dataset, reducing GPU memory usage by up to 73.25% and accelerating training speed by a factor of 2.1, while maintaining accuracy comparable to vanilla fine-tuning and PEFT methods.

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Zirui Lin, Haris Gulzar, Monnika Roslianna Busto, Akiko Masaki, Takeharu Eda, Kazuhiro Nakadai. 2025-11-30. Dialect Identification Using Resource-Efficient Fine-Tuning Approaches. https://arxiv.org/abs/2512.02074

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