用语音直接生成图像,效果超越现有方法。
Speak the Art: A Direct Speech to Image Generation Framework
- 语音编码器结合图文预训练模型,提升语义表征能力。
- 采用VQ-Diffusion替代GAN,生成图像更稳定且多样。
- 支持多语言(英、阿),适用于跨语言图像生成任务。
直接语音到图像生成近期取得显著进展,但相较于文本到图像生成仍存在较大差距。现有方法通常采用两阶段流程:语音编码网络与图像生成对抗网络(GAN)。然而,这些方法的语音编码器生成的嵌入无法充分捕捉语言信息以语义表征输入语音;而GAN则面临不收敛、模式崩溃和梯度消失等问题,导致模型参数不稳定、样本多样性有限、生成器学习效率低。为解决上述问题,本文提出名为Speak the Art(STA)的框架,包含一个语音编码网络与一个基于语音嵌入条件的VQ-Diffusion网络。通过在训练中利用大型预训练图文模型对语音编码器进行监督,显著提升了语音嵌入的语义表达能力。用扩散模型替代GAN实现了更稳定的训练过程,并生成更多样化的图像。此外,我们探索了框架扩展至多语言的可行性,以英语和阿拉伯语为实例进行了验证。实验结果表明,该框架在多个指标上显著超越当前最优模型。
原文摘要 · Abstract (English)
Direct speech-to-image generation has recently shown promising results. However, compared to text-to-image generation, there is still a large gap to enclose. Current approaches use two stages to tackle this task: speech encoding network and image generative adversarial network (GAN). The speech encoding networks in these approaches produce embeddings that do not capture sufficient linguistic information to semantically represent the input speech. GANs suffer from issues such as non-convergence, mode collapse, and diminished gradient, which result in unstable model parameters, limited sample diversity, and ineffective generator learning, respectively. To address these weaknesses, we introduce a framework called Speak the Art (STA) which consists of a speech encoding network and a VQ-Diffusion network conditioned on speech embeddings. To improve speech embeddings, the speech encoding network is supervised by a large pre-trained image-text model during training. Replacing GANs with diffusion leads to more stable training and the generation of diverse images. Additionally, we investigate the feasibility of extending our framework to be multilingual. As a proof of concept, we trained our framework with two languages: English and Arabic. Finally, we show that our results surpass state-of-the-art models by a large margin.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。