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Gautam Bhattacharya

6 accepted papers

2025

Antidote: Post-fine-tuning Safety Alignment for Large Language Models against Harmful Fine-tuning Attack

ICML 2025poster

Safety aligned Large Language Models (LLMs) are vulnerable to harmful fine-tuning attacks -- a few harmful data mixed in the fine-tuning dataset can break the LLMs's safety alignment. While several defenses have been proposed, our evaluation shows that existing defenses fail \textit{when some specif…

Cited by 0SourcePDFScholar
2025

Single-stage TTS with Masked Audio Token Modeling and Semantic Knowledge Distillation

ICASSP 2025accepted

Audio token modeling has become a powerful framework for speech synthesis, with two-stage approaches employing semantic tokens remaining prevalent. In this paper, we aim to simplify this process by introducing a semantic knowledge distillation method that enables high-quality speech generation in a…

Cited by 0SourceScholar
2023

Full-Band General Audio Synthesis with Score-Based Diffusion

ICASSP 2023accepted

Recent works have shown the capability of deep generative models to tackle general audio synthesis from a single label, producing a variety of impulsive, tonal, and environmental sounds. Such models operate on band-limited signals and, as a result of an autoregressive approach, they are typically co…

Cited by 0SourceScholar
2019

Adapting End-to-end Neural Speaker Verification to New Languages and Recording Conditions with Adversarial Training

ICASSP 2019accepted

In this article we propose a novel approach for adapting speaker embeddings to new domains based on adversarial training of neural networks. We apply our embeddings to the task of text-independent speaker verification, a challenging, real-world problem in biometric security. We further the developme…

Cited by 0SourceScholar
2019

Generative Adversarial Speaker Embedding Networks for Domain Robust End-to-end Speaker Verification

ICASSP 2019accepted

This article presents a novel approach for learning domain-invariant speaker embeddings using Generative Adversarial Networks. The main idea is to confuse a domain discriminator so that it cannot tell if embeddings are from the source or target domains. We train several GAN variants using our propos…

Cited by 0SourceScholar