arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2602.23333cs.SD
收藏

SemanticVocoder: 通过语义潜在空间弥合音频生成与音频理解

SemanticVocoder: Bridging Audio Generation and Audio Understanding via Semantic Latents

Peking University(北京大学);Tencent AI Lab(腾讯AI实验室);Shanghai AI Lab(上海AI实验室);SJTU(上海交通大学)

Zeyu Xie, Chenxing Li, Qiao Jin, Xuenan Xu, Guanrou Yang, Wenfu Wang, Mengyue Wu, Dong Yu, Yuexian Zou

AI总结:

SemanticVocoder通过引入语义潜在空间,实现了音频生成与理解的统一,提升了生成性能并推动了共享语义空间的研究。

摘要:

最近的音频生成模型通常依赖变分自编码器(VAEs)并在VAE潜在空间中进行生成。尽管VAEs在压缩和重建方面表现出色,但其潜在空间本质上编码了低级音频细节而不是语义区分信息,导致事件语义纠缠并复杂化生成模型的训练。为了解决这些问题,我们弃用了VAE音频潜在空间,引入了语义编码器潜在空间,从而提出SemanticVocoder,一种直接从语义潜在空间合成波形的生成式 vocoder。配备SemanticVocoder后,我们的文本到音频生成模型在AudioCaps测试集上实现了Fréchet距离为12.823和Fréchet音频距离为1.709,因为引入的语义潜在空间相比音频VAE潜在空间表现出更优的区分能力。除了改进的生成性能外,它还为在共享语义空间内统一音频理解和生成提供了一个有前景的尝试。生成的样本可在https://zeyuxie29.github.io/SemanticVocoder/上获取。

英文摘要:

Recent audio generation models typically rely on Variational Autoencoders (VAEs) and perform generation within the VAE latent space. Although VAEs excel at compression and reconstruction, their latents inherently encode low-level acoustic details rather than semantically discriminative information, leading to entangled event semantics and complicating the training of generative models. To address these issues, we discard VAE acoustic latents and introduce semantic encoder latents, thereby proposing SemanticVocoder, a generative vocoder that directly synthesizes waveforms from semantic latents. Equipped with SemanticVocoder, our text-to-audio generation model achieves a Frechet Distance of 12.823 and a Frechet Audio Distance of 1.709 on the AudioCaps test set, as the introduced semantic latents exhibit superior discriminability compared to acoustic VAE latents. Beyond improved generation performance, it also serves as a promising attempt towards unifying audio understanding and generation within a shared semantic space. Generated samples are available at https://zeyuxie29.github.io/SemanticVocoder/.

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。

↑