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Most GAN(Generative Adversarial Network)-based approaches towards high-fidelity waveform generation heavily rely on discriminators to improve their performance. However, GAN methods introduce much uncertainty into the generation process and…

Sound · Computer Science 2022-03-22 Shengyuan Xu , Wenxiao Zhao , Jing Guo

Entertainment-oriented singing voice synthesis (SVS) requires a vocoder to generate high-fidelity (e.g. 48kHz) audio. However, most text-to-speech (TTS) vocoders cannot reconstruct the waveform well in this scenario. In this paper, we…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-19 Chunhui Wang , Chang Zeng , Jun Chen , Xing He

In this paper we propose Flowtron: an autoregressive flow-based generative network for text-to-speech synthesis with control over speech variation and style transfer. Flowtron borrows insights from IAF and revamps Tacotron in order to…

Sound · Computer Science 2020-07-17 Rafael Valle , Kevin Shih , Ryan Prenger , Bryan Catanzaro

We propose a novel autoregressive modeling approach for speech synthesis, combining a variational autoencoder (VAE) with a multi-modal latent space and an autoregressive model that uses Gaussian Mixture Models (GMM) as the conditional…

Machine Learning · Computer Science 2025-02-14 Weiwei Lin , Chenghan He

We introduce MAGNeT, a masked generative sequence modeling method that operates directly over several streams of audio tokens. Unlike prior work, MAGNeT is comprised of a single-stage, non-autoregressive transformer. During training, we…

The massive adoption of large language models (LLMs) demands efficient deployment strategies. However, the auto-regressive decoding process, which is fundamental to how most LLMs generate text, poses challenges to achieve efficient serving.…

Computation and Language · Computer Science 2024-01-15 Mingdao Liu , Aohan Zeng , Bowen Wang , Peng Zhang , Jie Tang , Yuxiao Dong

Error correction techniques have been used to refine the output sentences from automatic speech recognition (ASR) models and achieve a lower word error rate (WER) than original ASR outputs. Previous works usually use a sequence-to-sequence…

Computation and Language · Computer Science 2022-11-30 Yichong Leng , Xu Tan , Linchen Zhu , Jin Xu , Renqian Luo , Linquan Liu , Tao Qin , Xiang-Yang Li , Ed Lin , Tie-Yan Liu

Deep generative models have achieved significant progress in speech synthesis to date, while high-fidelity singing voice synthesis is still an open problem for its long continuous pronunciation, rich high-frequency parts, and strong…

Audio and Speech Processing · Electrical Eng. & Systems 2022-08-08 Rongjie Huang , Chenye Cui , Feiyang Chen , Yi Ren , Jinglin Liu , Zhou Zhao , Baoxing Huai , Zhefeng Wang

Recent advances in video generation have been dominated by diffusion and flow-matching models, which produce high-quality results but remain computationally intensive and difficult to scale. In this work, we introduce VideoAR, the first…

Computer Vision and Pattern Recognition · Computer Science 2026-01-15 Longbin Ji , Xiaoxiong Liu , Junyuan Shang , Shuohuan Wang , Yu Sun , Hua Wu , Haifeng Wang

We study reasoning tasks through a framework that integrates auto-regressive (AR) and non-autoregressive (NAR) language models. AR models, which generate text sequentially, excel at producing coherent outputs but often suffer from slow…

Artificial Intelligence · Computer Science 2025-09-26 Qihang Ai , Haiyun Jiang

As the basis of generative AI, an autoregressive model requires the generation of a new token depending on all the previously generated tokens, which brings high quality but also restricts the model to generate tokens one by one, forming a…

Computation and Language · Computer Science 2025-07-02 Zixian Huang , Chenxu Niu , Yu Gu , Gengyang Xiao , Xinwei Huang , Gong Cheng

This paper challenges the dominance of continuous pipelines in visual generation. We systematically investigate the performance gap between discrete and continuous methods. Contrary to the belief that discrete tokenizers are intrinsically…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Qihang Yu , Qihao Liu , Ju He , Xinyang Zhang , Yang Liu , Liang-Chieh Chen , Xi Chen

Non-autoregressive (NAR) generation, which is first proposed in neural machine translation (NMT) to speed up inference, has attracted much attention in both machine learning and natural language processing communities. While NAR generation…

Computation and Language · Computer Science 2023-07-07 Yisheng Xiao , Lijun Wu , Junliang Guo , Juntao Li , Min Zhang , Tao Qin , Tie-yan Liu

Modern text-to-speech synthesis pipelines typically involve multiple processing stages, each of which is designed or learnt independently from the rest. In this work, we take on the challenging task of learning to synthesise speech from…

Sound · Computer Science 2021-03-18 Jeff Donahue , Sander Dieleman , Mikołaj Bińkowski , Erich Elsen , Karen Simonyan

The generative adversarial networks (GANs) have facilitated the development of speech enhancement recently. Nevertheless, the performance advantage is still limited when compared with state-of-the-art models. In this paper, we propose a…

Sound · Computer Science 2020-06-16 Andong Li , Chengshi Zheng , Renhua Peng , Cunhang Fan , Xiaodong Li

Deep generative models applied to audio have improved by a large margin the state-of-the-art in many speech and music related tasks. However, as raw waveform modelling remains an inherently difficult task, audio generative models are either…

Machine Learning · Computer Science 2021-12-16 Antoine Caillon , Philippe Esling

In this work, we propose ParaNet, a non-autoregressive seq2seq model that converts text to spectrogram. It is fully convolutional and brings 46.7 times speed-up over the lightweight Deep Voice 3 at synthesis, while obtaining reasonably good…

Computation and Language · Computer Science 2020-07-01 Kainan Peng , Wei Ping , Zhao Song , Kexin Zhao

Vocoders received renewed attention as main components in statistical parametric text-to-speech (TTS) synthesis and speech transformation systems. Even though there are vocoding techniques give almost accepted synthesized speech, their high…

Sound · Computer Science 2021-06-22 Mohammed Salah Al-Radhi , Tamás Gábor Csapó , Géza Németh

Current speech generation research can be categorized into two primary classes: non-autoregressive and autoregressive. The fundamental distinction between these approaches lies in the duration prediction strategy employed for…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-16 Linhan Ma , Dake Guo , He Wang , Jin Xu , Lei Xie

Expressive text-to-speech systems have undergone significant advancements owing to prosody modeling, but conventional methods can still be improved. Traditional approaches have relied on the autoregressive method to predict the quantized…

Sound · Computer Science 2025-01-22 Hyung-Seok Oh , Sang-Hoon Lee , Seong-Whan Lee