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- W2666408839 abstract "We propose a postfilter based on a generative adversarial network (GAN) to compensate for the differences between natural speech and speech synthesized by statistical parametric speech synthesis. In particular, we focus on the differences caused by over-smoothing, which makes the sounds muffled. Over-smoothing occurs in the time and frequency directions and is highly correlated in both directions, and conventional methods based on heuristics are too limited to cover all the factors (e.g., global variance was designed only to recover the dynamic range). To solve this problem, we focus on “spectral texture”, i.e., the details of the time-frequency representation, and propose a learning-based postfilter that captures the structures directly from the data. To estimate the true distribution, we utilize a GAN composed of a generator and a discriminator. This optimizes the generator to produce samples imitating the dataset according to the adversarial discriminator. This adversarial process encourages the generator to fit the true data distribution, i.e., to generate realistic spectral texture. Objective evaluation of experimental results shows that the GAN-based postfilter can compensate for detailed spectral structures including modulation spectrum, and subjective evaluation shows that its generated speech is comparable to natural speech." @default.
- W2666408839 created "2017-06-30" @default.
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- W2666408839 date "2017-03-01" @default.
- W2666408839 modified "2023-10-18" @default.
- W2666408839 title "Generative adversarial network-based postfilter for statistical parametric speech synthesis" @default.
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- W2666408839 doi "https://doi.org/10.1109/icassp.2017.7953090" @default.
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