MoDiTalker: Motion-Disentangled Diffusion Model for High-Fidelity Talking Head Generation

Abstract Conventional GAN-based models for talking head generation often suffer from limited quality and unstable training. Recent approaches based on diffusion models have attempted to address these limitations and improve fidelity. However, they still face challenges, such as intensive sampling times and difficulties in maintaining temporal consistency due to the high stochasticity of diffusion models. To overcome these challenges, we propose a novel motion-disentangled diffusion model for high-quality talking head generation, called MoDiTalker. We introduce two modules: the Audio-To-Motion (AToM) module, designed to generate synchronized lip movements from audio, and the Motion-To-Video (MToV) module, designed to produce high-quality talking head videos based on the generated motions. AToM excels in capturing subtle lip movements by leveraging an audio attention mechanism. Additionally, MToV enhances temporal consistency by utilizing an efficient tri-plane representation. Our experiments on standard benchmarks demonstrate that our model outperforms existing GAN-based and diffusion-based models. We also provide comprehensive ablation studies and user study results.