Cited by 272Speech Recognition and SynthesisSpeech and Audio ProcessingVoice and Speech Disorders

CycleGAN-VC2: improved CycleGAN-based non-parallel voice conversion.

Kaneko, Takuhiro, Kameoka, Hirokazu, Tanaka, Kou, Hojo, Nobukatsu·2019·ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Abstract

Non-parallel voice conversion (VC) is a technique for learning the mapping from source to target speech without relying on parallel data. This is an important task, but it has been challenging due to the disadvantages of the training conditions. Recently, CycleGAN-VC has provided a breakthrough and performed comparably to a parallel VC method without relying on any extra data, modules, or time alignment procedures. However, there is still a large gap between the real target and converted speech, and bridging this gap remains a challenge. To reduce the gap, we propose CycleGAN-VC2, which is an improved version of CycleGAN-VC incorporating three new techniques: an improved objective (two-step adversarial losses), improved generator (2-1-2D CNN), and improved discriminator (PatchGAN). We evaluated our method on a non-parallel VC task and analyzed the effect of each technique in detail. An objective evaluation showed that these techniques help bring the converted feature sequence closer to the target in terms of both global and local structures, which we assess by using Mel-cepstral distortion and modulation spectra distance, respectively. A subjective evaluation showed that CycleGAN-VC2 outperforms CycleGAN-VC in terms of naturalness and similarity for every speaker pair, including intra-gender and inter-gender pairs.

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Crossref · 10.1109/icassp.2019.8682897

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  • An additional cycle-consistency loss function improves the stability of the training process and defines cycle GANs.

    “To improve the stability of the training process, an additional cycle-consistency loss function was proposed to optimize the structure of GAN, which was defined as cycle GANs (Kaneko et al., 2019).”

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Authors
Kaneko, T., Kameoka, H., Tanaka, K., & Hojo, N.
Affiliations
NTT (Japan) (JP)
Venue
ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Publisher
IEEE
Published
2019-05
Pages
6820-6824
ISSN
1520-6149 (ISSN-L)
OpenAlex
W2937579788
Cited by
272
References
58
Citations by year
2026: 14 · 2025: 34 · 2024: 36 · 2023: 57 · 2022: 39 · 2021: 43 · 2020: 34 · 2019: 15
FWCI
12.53
Type
conference paper
Language
en
Open access
closed
Locations
IEEE International Conference on Acoustics Speech and Signal Processing (publishedVersion)
Funders
Virginia Agricultural Experiment Station, Virginia Polytechnic Institute and State University
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Speech Recognition and Synthesis
  • Physical Sciences › Computer Science › Signal Processing › Speech and Audio Processing
  • Health Sciences › Medicine › Physiology › Voice and Speech Disorders
Keywords
non-parallel voice conversion, adversarial training, PatchGAN discriminator, Mel cepstral distortion, speech naturalness

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