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This paper introduces PFlow-VC, a conditional flow matching voice conversion model that leverages fine-grained discrete pitch tokens and target speaker prompt information for expressive voice conversion (VC). Previous VC works primarily…

For natural language understanding (NLU) technology to be maximally useful, both practically and as a scientific object of study, it must be general: it must be able to process language in a way that is not exclusively tailored to any one…

Computation and Language · Computer Science 2019-02-26 Alex Wang , Amanpreet Singh , Julian Michael , Felix Hill , Omer Levy , Samuel R. Bowman

In recent years, various flow-based generative models have been proposed to generate high-fidelity waveforms in real-time. However, these models require either a well-trained teacher network or a number of flow steps making them…

Sound · Computer Science 2020-07-06 Hyeongju Kim , Hyeonseung Lee , Woo Hyun Kang , Sung Jun Cheon , Byoung Jin Choi , Nam Soo Kim

Generative modeling has recently achieved remarkable success across image, video, and audio domains, demonstrating powerful capabilities for unified representation learning. Yet speech front-end tasks such as speech enhancement (SE), target…

Audio and Speech Processing · Electrical Eng. & Systems 2025-08-12 Ziqian Wang , Zikai Liu , Yike Zhu , Xingchen Li , Boyi Kang , Jixun Yao , Xianjun Xia , Chuanzeng Huang , Lei Xie

Flow matching models have emerged as a powerful method for generative modeling on domains like images or videos, and even on irregular or unstructured data like 3D point clouds or even protein structures. These models are commonly trained…

Machine Learning · Computer Science 2025-05-30 Yuyang Wang , Anurag Ranjan , Josh Susskind , Miguel Angel Bautista

Voice cloning is a highly desired feature for personalized speech interfaces. Neural network based speech synthesis has been shown to generate high quality speech for a large number of speakers. In this paper, we introduce a neural voice…

Computation and Language · Computer Science 2018-10-15 Sercan O. Arik , Jitong Chen , Kainan Peng , Wei Ping , Yanqi Zhou

Whispered-to-normal (W2N) speech conversion aims to reconstruct missing phonation from whispered input while preserving content and speaker identity. This task is challenging due to temporal misalignment between whisper and voiced…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-05 Fabian Ritter-Gutierrez , Md Asif Jalal , Pablo Peso Parada , Karthikeyan Saravanan , Yusun Shul , Minseung Kim , Gun-Woo Lee , Han-Gil Moon

End-to-end models are an attractive new approach to spoken language understanding (SLU) in which the meaning of an utterance is inferred directly from the raw audio without employing the standard pipeline composed of a separately trained…

Audio and Speech Processing · Electrical Eng. & Systems 2019-10-22 Loren Lugosch , Brett Meyer , Derek Nowrouzezahrai , Mirco Ravanelli

Binaural rendering aims to synthesize binaural audio that mimics natural hearing based on a mono audio and the locations of the speaker and listener. Although many methods have been proposed to solve this problem, they struggle with…

Recently, voice conversion (VC) without parallel data has been successfully adapted to multi-target scenario in which a single model is trained to convert the input voice to many different speakers. However, such model suffers from the…

Machine Learning · Computer Science 2019-08-23 Ju-chieh Chou , Cheng-chieh Yeh , Hung-yi Lee

The goal of voice conversion is to transform the speech of a source speaker to sound like that of a reference speaker while preserving the original content. A key challenge is to extract disentangled linguistic content from the source and…

Sound · Computer Science 2025-01-15 Jaehun Kim , Ji-Hoon Kim , Yeunju Choi , Tan Dat Nguyen , Seongkyu Mun , Joon Son Chung

Progress in speech processing has been facilitated by shared datasets and benchmarks. Historically these have focused on automatic speech recognition (ASR), speaker identification, or other lower-level tasks. Interest has been growing in…

Computation and Language · Computer Science 2022-08-01 Suwon Shon , Ankita Pasad , Felix Wu , Pablo Brusco , Yoav Artzi , Karen Livescu , Kyu J. Han

We consider the problem of single-channel audio source separation with the goal of reconstructing $K$ sources from their mixture. We address this ill-posed problem with FLOSS (FLOw matching for Source Separation), a constrained generation…

Sound · Computer Science 2025-07-21 Robin Scheibler , John R. Hershey , Arnaud Doucet , Henry Li

Flow matching has emerged as a powerful generative framework, with recent few-step methods achieving remarkable inference acceleration. However, we identify a critical yet overlooked limitation: these models suffer from severe diversity…

Machine Learning · Computer Science 2026-04-15 Yexiong Lin , Jia Shi , Shanshan Ye , Wanyu Wang , Yu Yao , Tongliang Liu

Voice Conversion (VC) aims to convert the style of a source speaker, such as timbre and pitch, to the style of any target speaker while preserving the linguistic content. However, the ground truth of the converted speech does not exist in a…

Sound · Computer Science 2025-01-06 Ziqi Liang , Xulong Zhang , Chang Liu , Xiaoyang Qu , Weifeng Zhao , Jianzong Wang

Singing voice conversion is to convert the source singing voice into the target singing voice except for the content. Currently, flow-based models can complete the task of voice conversion, but they struggle to effectively extract latent…

Audio and Speech Processing · Electrical Eng. & Systems 2024-09-10 Hui Li , Hongyu Wang , Zhijin Chen , Bohan Sun , Bo Li

The high demand for computer science education has led to high enrollments, with thousands of students in many introductory courses. In such large courses, it can be overwhelmingly difficult for instructors to understand class-wide…

Human-Computer Interaction · Computer Science 2024-04-17 Ashley Ge Zhang , Xiaohang Tang , Steve Oney , Yan Chen

Diffusion models, and their generalization, flow matching, have had a remarkable impact on the field of media generation. Here, the conventional approach is to learn the complex mapping from a simple source distribution of Gaussian noise to…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Qihao Liu , Xi Yin , Alan Yuille , Andrew Brown , Mannat Singh

Audio generation, including speech, music and sound effects, has advanced rapidly in recent years. These tasks can be divided into two categories: time-aligned (TA) tasks, where each input unit corresponds to a specific segment of the…

Sound · Computer Science 2025-09-30 Xuenan Xu , Jiahao Mei , Zihao Zheng , Ye Tao , Zeyu Xie , Yaoyun Zhang , Haohe Liu , Yuning Wu , Ming Yan , Wen Wu , Chao Zhang , Mengyue Wu

Recently proposed normalizing flow models such as Glow have been shown to be able to generate high quality, high dimensional images with relatively fast sampling speed. Due to their inherently restrictive architecture, however, it is…

Machine Learning · Computer Science 2020-04-14 Rogan Morrow , Wei-Chen Chiu