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Flow matching offers a robust and stable approach to training diffusion models. However, directly applying flow matching to neural vocoders can result in subpar audio quality. In this work, we present WaveFM, a reparameterized flow matching…

Sound · Computer Science 2025-03-24 Tianze Luo , Xingchen Miao , Wenbo Duan

This paper introduces the Multi-Band Excited WaveNet a neural vocoder for speaking and singing voices. It aims to advance the state of the art towards an universal neural vocoder, which is a model that can generate voice signals from…

Audio and Speech Processing · Electrical Eng. & Systems 2021-10-08 Axel Roebel , Frederik Bous

We present a neural speech codec that challenges the need for complex residual vector quantization (RVQ) stacks by introducing a simpler, single-stage quantization approach. Our method operates directly on the mel-spectrogram, treating it…

Sound · Computer Science 2025-09-03 Luis Felipe Chary , Miguel Arjona Ramirez

This paper introduces a novel algorithm designed for speech synthesis from neural activity recordings obtained using invasive electroencephalography (EEG) techniques. The proposed system offers a promising communication solution for…

The conversion from text to speech relies on the accurate mapping from linguistic to acoustic symbol sequences, for which current practice employs recurrent statistical models like recurrent neural networks. Despite the good performance of…

Sound · Computer Science 2018-11-07 Santiago Pascual , Antonio Bonafonte , Joan Serrà

Large Audio Language Models (LALMs) have emerged with strong performance across diverse audio understanding tasks and can be further enhanced by neural audio codecs. Transitioning from multi-layer residual vector quantizers to a…

Sound · Computer Science 2025-12-05 Jingyi Li , Zhiyuan Zhao , Zhisheng Zhang , Yunfei Liu , Lijian Lin , Ye Zhu , Jiahao Wu , Qiuqiang Kong , Yu Li

Universal audio codecs learn entangled representations across audio types, whereas some specific codecs offer decoupled representations but are limited to speech. Real-world audio, however, often contains mixed speech and background sounds,…

Sound · Computer Science 2025-09-12 Xiaoxue Luo , Jinwei Huang , Runyan Yang , Yingying Gao , Junlan Feng , Chao Deng , Shilei Zhang

Neural audio codecs optimized for mel-spectrogram reconstruction often fail to preserve intelligibility. While semantic encoder distillation improves encoded representations, it does not guarantee content preservation in reconstructed…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-09 Junhyeok Lee , Xiluo He , Jihwan Lee , Helin Wang , Shrikanth Narayanan , Thomas Thebaud , Laureano Moro-Velazquez , Jesús Villalba , Najim Dehak

Audio-visual speech enhancement aims to extract clean speech from a noisy environment by leveraging not only the audio itself but also the target speaker's lip movements. This approach has been shown to yield improvements over audio-only…

Neural speech codecs have demonstrated their ability to compress high-quality speech and audio by converting them into discrete token representations. Most existing methods utilize Residual Vector Quantization (RVQ) to encode speech into…

Sound · Computer Science 2024-10-22 Peiji Yang , Fengping Wang , Yicheng Zhong , Huawei Wei , Zhisheng Wang

Neural audio codecs have gained recent popularity for their use in generative modeling as they offer high-fidelity audio reconstruction at low bitrates. While human listening studies remain the gold standard for assessing perceptual…

Sound · Computer Science 2025-11-26 Luca A. Lanzendörfer , Florian Grötschla

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

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

Generative adversarial network (GAN) models can synthesize highquality audio signals while ensuring fast sample generation. However, they are difficult to train and are prone to several issues including mode collapse and divergence. In this…

Sound · Computer Science 2024-02-06 Teysir Baoueb , Haocheng Liu , Mathieu Fontaine , Jonathan Le Roux , Gael Richard

Large Language Models (LLMs) have advanced audio generation through discrete representation learning. However, most existing neural codecs focus on speech and emphasize reconstruction fidelity, overlooking unified low frame rate modeling…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-24 Jingbin Hu , Haoyu Zhang , Dake Guo , Qirui Zhan , Wenhao Li , Huakang Chen , Guobin Ma , Hanke Xie , Chengyou Wang , Pengyuan Xie , Chuan Xie , Qiang Zhang , Lei Xie

Since the introduction of Generative Adversarial Networks (GANs) in speech synthesis, remarkable achievements have been attained. In a thorough exploration of vocoders, it has been discovered that audio waveforms can be generated at speeds…

Audio and Speech Processing · Electrical Eng. & Systems 2024-08-14 Yubing Cao , Yongming Li , Liejun Wang , Yinfeng Yu

Generating sound effects that humans want is an important topic. However, there are few studies in this area for sound generation. In this study, we investigate generating sound conditioned on a text prompt and propose a novel text-to-sound…

Sound · Computer Science 2023-05-01 Dongchao Yang , Jianwei Yu , Helin Wang , Wen Wang , Chao Weng , Yuexian Zou , Dong Yu

This paper proposes a novel neural audio codec, named APCodec+, which is an improved version of APCodec. The APCodec+ takes the audio amplitude and phase spectra as the coding object, and employs an adversarial training strategy.…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-31 Hui-Peng Du , Yang Ai , Rui-Chen Zheng , Zhen-Hua Ling

The vast majority of approaches to speaker anonymization involve the extraction of fundamental frequency estimates, linguistic features and a speaker embedding which is perturbed to obfuscate the speaker identity before an anonymized speech…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-15 Michele Panariello , Francesco Nespoli , Massimiliano Todisco , Nicholas Evans

With the proliferation of Large Language Model (LLM) based deepfake audio, there is an urgent need for effective detection methods. Previous deepfake audio generation methods typically involve a multi-step generation process, with the final…