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Phonetic normalization plays a crucial role in speech recognition and analysis, ensuring the comparability of features derived from raw audio data. However, in the current paradigm of fine-tuning pre-trained large transformer models,…

Computation and Language · Computer Science 2025-03-10 Yiming Wang , Yi Yang , Jiahong Yuan

We compare self-supervised representation learning algorithms which either explicitly quantize the audio data or learn representations without quantization. We find the former to be more accurate since it builds a good vocabulary of the…

Computation and Language · Computer Science 2020-05-20 Alexei Baevski , Michael Auli , Abdelrahman Mohamed

Speaker recognition, recognizing speaker identities based on voice alone, enables important downstream applications, such as personalization and authentication. Learning speaker representations, in the context of supervised learning,…

Machine Learning · Computer Science 2022-07-13 Metehan Cekic , Ruirui Li , Zeya Chen , Yuguang Yang , Andreas Stolcke , Upamanyu Madhow

Neural latent variable models enable the discovery of interesting structure in speech audio data. This paper presents a comparison of two different approaches which are broadly based on predicting future time-steps or auto-encoding the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-28 Henry Zhou , Alexei Baevski , Michael Auli

We improve low-resource ASR by integrating the ideas of multilingual training and self-supervised learning. Concretely, we leverage an International Phonetic Alphabet (IPA) multilingual model to create frame-level pseudo labels for…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-22 Siyuan Feng , Ming Tu , Rui Xia , Chuanzeng Huang , Yuxuan Wang

Several deep neural networks have recently been shown to generate activations similar to those of the brain in response to the same input. These algorithms, however, remain largely implausible: they require (1) extraordinarily large amounts…

Wav2vec-C introduces a novel representation learning technique combining elements from wav2vec 2.0 and VQ-VAE. Our model learns to reproduce quantized representations from partially masked speech encoding using a contrastive loss in a way…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-25 Samik Sadhu , Di He , Che-Wei Huang , Sri Harish Mallidi , Minhua Wu , Ariya Rastrow , Andreas Stolcke , Jasha Droppo , Roland Maas

Pretrained contextualized text representation models learn an effective representation of a natural language to make it machine understandable. After the breakthrough of the attention mechanism, a new generation of pretrained models have…

We present a simple and effective self-supervised learning approach for speech recognition. The approach learns a model to predict the masked speech signals, in the form of discrete labels generated with a random-projection quantizer. In…

Computation and Language · Computer Science 2022-07-01 Chung-Cheng Chiu , James Qin , Yu Zhang , Jiahui Yu , Yonghui Wu

For self-supervised speech processing, it is crucial to use pretrained models as speech representation extractors. In recent works, increasing the size of the model has been utilized in acoustic model training in order to achieve better…

Audio and Speech Processing · Electrical Eng. & Systems 2021-05-04 Po-Han Chi , Pei-Hung Chung , Tsung-Han Wu , Chun-Cheng Hsieh , Yen-Hao Chen , Shang-Wen Li , Hung-yi Lee

Recent advances in self-supervised learning through contrastive training have shown that it is possible to learn a competitive speech recognition system with as little as 10 minutes of labeled data. However, these systems are…

Audio and Speech Processing · Electrical Eng. & Systems 2021-02-02 Lasse Borgholt , Tycho Max Sylvester Tax , Jakob Drachmann Havtorn , Lars Maaløe , Christian Igel

Unsupervised speech models are becoming ubiquitous in the speech and machine learning communities. Upstream models are responsible for learning meaningful representations from raw audio. Later, these representations serve as input to…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-10 Heitor Guimarães , Arthur Pimentel , Anderson Avila , Mehdi Rezagholizadeh , Tiago H. Falk

Transformer-based pre-trained language models have proven to be effective for learning contextualized language representation. However, current approaches only take advantage of the output of the encoder's final layer when fine-tuning the…

Computation and Language · Computer Science 2020-04-30 Junjie Yang , Hai Zhao

Speech is the surface form of a finite set of phonetic units, which can be represented by discrete codes. We propose the Code BERT (CoBERT) approach for self-supervised speech representation learning. The idea is to convert an utterance to…

Sound · Computer Science 2023-07-06 Chutong Meng , Junyi Ao , Tom Ko , Mingxuan Wang , Haizhou Li

Self-training and unsupervised pre-training have emerged as effective approaches to improve speech recognition systems using unlabeled data. However, it is not clear whether they learn similar patterns or if they can be effectively…

This paper presents XLSR which learns cross-lingual speech representations by pretraining a single model from the raw waveform of speech in multiple languages. We build on wav2vec 2.0 which is trained by solving a contrastive task over…

Computation and Language · Computer Science 2020-12-17 Alexis Conneau , Alexei Baevski , Ronan Collobert , Abdelrahman Mohamed , Michael Auli

Recent advances in large language models (LLMs) have yielded impressive performance on various tasks, yet they often depend on high-quality feedback that can be costly. Self-refinement methods attempt to leverage LLMs' internal evaluation…

Computation and Language · Computer Science 2025-12-01 Hikaru Asano , Tadashi Kozuno , Yukino Baba

Recently, pioneer work finds that speech pre-trained models can solve full-stack speech processing tasks, because the model utilizes bottom layers to learn speaker-related information and top layers to encode content-related information.…

Audio and Speech Processing · Electrical Eng. & Systems 2021-12-17 Chengyi Wang , Yu Wu , Sanyuan Chen , Shujie Liu , Jinyu Li , Yao Qian , Zhenglu Yang

While the general idea of self-supervised learning is identical across modalities, the actual algorithms and objectives differ widely because they were developed with a single modality in mind. To get us closer to general self-supervised…

Machine Learning · Computer Science 2022-10-27 Alexei Baevski , Wei-Ning Hsu , Qiantong Xu , Arun Babu , Jiatao Gu , Michael Auli

We investigate recent transformer networks pre-trained for automatic speech recognition for their ability to detect speaker and language changes in speech. We do this by simply adding speaker (change) or language targets to the labels. For…

Audio and Speech Processing · Electrical Eng. & Systems 2023-02-21 Tijn Berns , Nik Vaessen , David A. van Leeuwen