← Search

Krishna C. Puvvada

11 accepted papers

2025

NEST: Self-supervised Fast Conformer as All-purpose Seasoning to Speech Processing Tasks

ICASSP 2025accepted

Self-supervised learning (SSL) has been proved to benefit a wide range of speech processing tasks, such as speech recognition/translation, speaker verification and diarization, etc. However, most of current speech SSL approaches are computationally expensive. In this paper, we introduce a simplified…

Cited by 0SourceScholar
2025

SWAN: An Efficient and Scalable Approach for Long-Context Language Modeling

EMNLP 2025

We present SWAN, a causal Transformer architecture in the decoder-only style that generalizes robustly to sequence lengths substantially longer than those seen during training. SWAN interleaves layers without positional encodings (NoPE) and sliding-window attention layers equipped with rotary positi

2025

Sortformer: A Novel Approach for Permutation-Resolved Speaker Supervision in Speech-to-Text Systems

ICML 2025poster

Sortformer is an encoder-based speaker diarization model designed for supervising speaker tagging in speech-to-text models. Instead of relying solely on permutation invariant loss (PIL), Sortformer introduces Sort Loss to resolve the permutation problem, either independently or in tandem with PIL. I…

Cited by 0SourcePDFScholar
2025

VoiceTextBlender: Augmenting Large Language Models with Speech Capabilities via Single-Stage Joint Speech-Text Supervised Fine-Tuning

NAACL 2025long

Recent studies have augmented large language models (LLMs) with speech capabilities, leading to the development of speech language models (SpeechLMs). Earlier SpeechLMs focused on single-turn speech-based question answering (QA), where user input comprised a speech context and a text question. More…

2024

Discrete Audio Representation as an Alternative to Mel-Spectrograms for Speaker and Speech Recognition

ICASSP 2024accepted

Discrete audio representation, aka audio tokenization, has seen renewed interest driven by its potential to facilitate the application of text language modeling approaches in audio domain. To this end, various compression and representation-learning based tokenization schemes have been proposed. How…

Cited by 0SourceScholar
2024

Multilingual Audio-Visual Speech Recognition with Hybrid CTC/RNN-T Fast Conformer

ICASSP 2024accepted

Humans are adept at leveraging visual cues from lip movements for recognizing speech in adverse listening conditions. Audio-Visual Speech Recognition (AVSR) models follow similar approach to achieve robust speech recognition in noisy conditions. In this work, we present a multilingual AVSR model inc…

Cited by 0SourceScholar
2024

SALM: Speech-Augmented Language Model with in-Context Learning for Speech Recognition and Translation

ICASSP 2024accepted

We present a novel Speech Augmented Language Model (SALM) with multitask and in-context learning capabilities. SALM comprises a frozen text LLM, a audio encoder, a modality adapter module, and LoRA layers to accommodate speech input and associated task instructions. The unified SALM not only achieve…

Cited by 0SourceScholar
2023

Accidental Learners: Spoken Language Identification in Multilingual Self-Supervised Models

ICASSP 2023accepted

In this paper, we extend previous self-supervised approaches for language identification by experimenting with Conformer based architecture in a multilingual pre-training paradigm. We find that pre-trained speech models optimally encode language discriminatory information in lower layers. Further, w…

Cited by 0SourceScholar
2023

Conformer-Based Target-Speaker Automatic Speech Recognition For Single-Channel Audio

ICASSP 2023accepted

We propose CONF-TSASR, a non-autoregressive end-to-end time-frequency domain architecture for single-channel target-speaker automatic speech recognition (TS-ASR). The model consists of a TitaNet based speaker embedding module, a Conformer based masking as well as ASR modules. These modules are joint…

Cited by 0SourceScholar
2021

Unsupervised and Semi-Supervised Few-Shot Acoustic Event Classification

ICASSP 2021accepted

Few-shot Acoustic Event Classification (AEC) aims to learn a model to recognize novel acoustic events using very limited labeled data. Previous works utilize supervised pre-training as well as meta-learning approaches, which heavily rely on labeled data. Here, we study unsupervised and semi-supervis…

Cited by 0SourceScholar
2020

Few-Shot Acoustic Event Detection Via Meta Learning

ICASSP 2020accepted

We study few-shot acoustic event detection (AED) in this paper. Few-shot learning enables detection of new events with very limited labeled data. Compared to other research areas like computer vision, few-shot learning for audio recognition has been under-studied. We formulate few-shot AED problem a…

Cited by 0SourceScholar