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Neural sequence-to-sequence TTS has achieved significantly better output quality than statistical speech synthesis using HMMs. However, neural TTS is generally not probabilistic and uses non-monotonic attention. Attention failures increase…

Audio and Speech Processing · Electrical Eng. & Systems 2022-05-03 Shivam Mehta , Éva Székely , Jonas Beskow , Gustav Eje Henter

The encoder-decoder framework has achieved promising process for many sequence generation tasks, such as neural machine translation and text summarization. Such a framework usually generates a sequence token by token from left to right,…

Computation and Language · Computer Science 2019-06-25 Long Zhou , Jiajun Zhang , Chengqing Zong , Heng Yu

End-to-end autonomous driving has made impressive progress in recent years. Existing methods usually adopt the decoupled encoder-decoder paradigm, where the encoder extracts hidden features from raw sensor data, and the decoder outputs the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-11 Xiaosong Jia , Penghao Wu , Li Chen , Jiangwei Xie , Conghui He , Junchi Yan , Hongyang Li

Over the past decade, a series of unflagging efforts have been dedicated to developing highly expressive and controllable text-to-speech (TTS) systems. In general, the holistic TTS comprises two interconnected components: the frontend…

Sound · Computer Science 2024-04-16 Quanxiu Wang , Hui Huang , Mingjie Wang , Yong Dai , Jinzuomu Zhong , Benlai Tang

Autoregressive language models like GPT aim to predict next tokens, while autoencoding models such as BERT are trained on tasks such as predicting masked tokens. We train a decoder-only architecture for predicting the second to last token…

Computation and Language · Computer Science 2025-02-17 Johannes Schneider

We propose a novel training strategy for Tacotron-based text-to-speech (TTS) system to improve the expressiveness of speech. One of the key challenges in prosody modeling is the lack of reference that makes explicit modeling difficult. The…

Sound · Computer Science 2021-04-13 Rui Liu , Berrak Sisman , Guanglai Gao , Haizhou Li

End-to-end text-to-speech synthesis systems achieved immense success in recent times, with improved naturalness and intelligibility. However, the end-to-end models, which primarily depend on the attention-based alignment, do not offer an…

Audio and Speech Processing · Electrical Eng. & Systems 2021-10-07 Giridhar Pamisetty , K. Sri Rama Murty

Autoregressive image generation aims to predict the next token based on previous ones. However, this process is challenged by the bidirectional dependencies inherent in conventional image tokenizations, which creates a fundamental…

Computer Vision and Pattern Recognition · Computer Science 2026-02-17 Pingyu Wu , Kai Zhu , Yu Liu , Longxiang Tang , Jian Yang , Yansong Peng , Wei Zhai , Yang Cao , Zheng-Jun Zha

End-to-end neural TTS has shown improved performance in speech style transfer. However, the improvement is still limited by the available training data in both target styles and speakers. Additionally, degenerated performance is observed…

Sound · Computer Science 2022-01-25 Xiaochun An , Frank K. Soong , Lei Xie

Text-to-speech (TTS) synthesis is the process of producing synthesized speech from text or phoneme input. Traditional TTS models contain multiple processing steps and require external aligners, which provide attention alignments of…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-08 Hyunseung Chung , Sang-Hoon Lee , Seong-Whan Lee

This paper introduces a novel method to diagnose the source-target attention in state-of-the-art end-to-end speech recognition models with joint connectionist temporal classification (CTC) and attention training. Our method is based on the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-03 Nanxin Chen , Piotr Żelasko , Jesús Villalba , Najim Dehak

Some recent studies have demonstrated the feasibility of single-stage neural text-to-speech, which does not need to generate mel-spectrograms but generates the raw waveforms directly from the text. Single-stage text-to-speech often faces…

Sound · Computer Science 2022-07-14 Zhengxi Liu , Qiao Tian , Chenxu Hu , Xudong Liu , Menglin Wu , Yuping Wang , Hang Zhao , Yuxuan Wang

Modern sequence to sequence neural TTS systems provide close to natural speech quality. Such systems usually comprise a network converting linguistic/phonetic features sequence to an acoustic features sequence, cascaded with a neural…

Audio and Speech Processing · Electrical Eng. & Systems 2019-09-26 Slava Shechtman , Alex Sorin

Transformers evaluated in a single, fixed-depth pass are provably limited in expressive power to the constant-depth circuit class TC0. Running a Transformer autoregressively removes that ceiling -- first in next-token prediction and, more…

Machine Learning · Computer Science 2025-07-21 Mrinal Mathur , Mike Doan , Barak Pearlmutter , Sergey Plis

In Mandarin text-to-speech (TTS) system, the front-end text processing module significantly influences the intelligibility and naturalness of synthesized speech. Building a typical pipeline-based front-end which consists of multiple…

Computation and Language · Computer Science 2019-11-12 Junjie Pan , Xiang Yin , Zhiling Zhang , Shichao Liu , Yang Zhang , Zejun Ma , Yuxuan Wang

Existing autoregressive large-scale text-to-speech (TTS) models have advantages in speech naturalness, but their token-by-token generation mechanism makes it difficult to precisely control the duration of synthesized speech. This becomes a…

Computation and Language · Computer Science 2025-09-04 Siyi Zhou , Yiquan Zhou , Yi He , Xun Zhou , Jinchao Wang , Wei Deng , Jingchen Shu

End-to-end Text-to-speech (TTS) system can greatly improve the quality of synthesised speech. But it usually suffers form high time latency due to its auto-regressive structure. And the synthesised speech may also suffer from some error…

Audio and Speech Processing · Electrical Eng. & Systems 2020-02-11 Dabiao Ma , Zhiba Su , Wenxuan Wang , Yuhao Lu

End-to-end (E2E) models have gained attention in the research field of automatic speech recognition (ASR). Many E2E models proposed so far assume left-to-right autoregressive generation of an output token sequence except for connectionist…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-17 Yuya Fujita , Shinji Watanabe , Motoi Omachi , Xuankai Chan

The predominant approach for language modeling is to process sequences from left to right, but this eliminates a source of information: the order by which the sequence was generated. One strategy to recover this information is to decode…

Computation and Language · Computer Science 2021-11-01 Xuanlin Li , Brandon Trabucco , Dong Huk Park , Michael Luo , Sheng Shen , Trevor Darrell , Yang Gao

Whilst recent neural text-to-speech (TTS) approaches produce high-quality speech, they typically require a large amount of recordings from the target speaker. In previous work, a 3-step method was proposed to generate high-quality TTS while…