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arXiv 2206.08545eess.AScs.LG
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NU-Wave 2:一种适用于不同采样率的通用神经音频上采样模型

NU-Wave 2: A General Neural Audio Upsampling Model for Various Sampling Rates

MINDsLab Inc.(MINDsLab公司);Seoul National University(首尔国立大学)

Seungu Han, Junhyeok Lee

摘要:

传统上,音频超分辨率模型固定初始和目标采样率,这需要针对每对采样率训练模型。我们介绍了NU-Wave 2,这是一种用于神经音频上采样的扩散模型,可以使用单个模型从各种采样率的输入生成48 kHz音频信号。基于NU-Wave的架构,NU-Wave 2使用短时傅立叶卷积(STFC)来产生谐波以解决NU-Wave的主要故障模式,并结合带宽谱特征变换(BSFT)来调节频域中输入的带宽。我们的实验证明,NU-Wave 2产生高分辨率的音频,无论输入的采样率,同时需要比其他模型更少的参数。官方代码和音频样本可在https://mindslab-ai.github.io/nuwave2上获得。

英文摘要:

Conventionally, audio super-resolution models fixed the initial and the target sampling rates, which necessitate the model to be trained for each pair of sampling rates. We introduce NU-Wave 2, a diffusion model for neural audio upsampling that enables the generation of 48 kHz audio signals from inputs of various sampling rates with a single model. Based on the architecture of NU-Wave, NU-Wave 2 uses short-time Fourier convolution (STFC) to generate harmonics to resolve the main failure modes of NU-Wave, and incorporates bandwidth spectral feature transform (BSFT) to condition the bandwidths of inputs in the frequency domain. We experimentally demonstrate that NU-Wave 2 produces high-resolution audio regardless of the sampling rate of input while requiring fewer parameters than other models. The official code and the audio samples are available at https://mindslab-ai.github.io/nuwave2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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