Generating realistic motions for digital humans is a core but challenging part of computer animations and games, as human motions are both diverse in content and rich in styles. While the latest deep learning approaches have made significant advancements in this domain, they mostly consider motion synthesis and style manipulation as two separate problems. This is mainly due to the challenge of learning both motion contents that account for the inter-class behaviour and styles that account for the intra-class behaviour effectively in a common representation. To tackle this challenge, we propose a denoising diffusion probabilistic model solution for styled motion synthesis. As diffusion models have a high capacity brought by the injection of stochasticity, we can represent both inter-class motion content and intra-class style behaviour in the same latent. This results in an integrated, end-to-end trained pipeline that facilitates the generation of optimal motion and exploration of content-style coupled latent space. To achieve high-quality results, we design a multi-task architecture of diffusion model that strategically generates aspects of human motions for local guidance. We also design adversarial and physical regulations for global guidance. We demonstrate superior performance with quantitative and qualitative results and validate the effectiveness of our multi-task architecture.

本文提出了一种针对数字人运动合成的解决方案，使用Denoising Diffusion Probabilistic Model中的扩散模型和多任务架构来表示不同类别的动作内容和不同内部类别行为的样式，并使用对抗性和物理规则来实现全局引导。实验结果表明，该方法能够产生高质量、逼真的人体运动，并有效验证了多任务架构的有效性。

利用去噪扩散概率模型统一人类动作合成和风格传递