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arXiv 2305.18891cs.CVcs.AIcs.MM

EmotionGesture:音频驱动的多样情感协同语音3D手势生成

EmotionGesture: Audio-Driven Diverse Emotional Co-Speech 3D Gesture Generation

The Hong Kong University of Science and Technology(香港科技大学);The University of Queensland(昆士兰大学);NetEase Fuxi AI Lab(网易伏羲人工智能实验室)

Xingqun Qi, Chen Liu, Lincheng Li, Jie Hou, Haoran Xin, Xin Yu

AI总结:

本文提出EmotionGesture框架,通过Emotion-Beat Mining模块、Spatial-Temporal Prompter、Motion-Smooth Loss和情感条件VAE,从音频生成生动多样的情感协同语音3D手势,优于现有方法。

摘要:

生成生动且多样的3D协同语音手势对于虚拟化身的各种动画应用至关重要。虽然大多数现有方法可以直接从音频生成手势,但它们通常忽略了情感是真实协同语音手势生成的关键因素之一。在这项工作中,我们提出了EmotionGesture,一个从音频合成生动且多样的情感协同语音3D手势的新颖框架。考虑到情感通常与语音音频中的节奏节拍交织在一起,我们首先开发了一个Emotion-Beat Mining模块(EBM),以提取情感和音频节拍特征,并通过基于文本的视觉-节奏对齐来建模它们的相关性。然后,我们提出了一个基于初始姿态的Spatial-Temporal Prompter(STP),用于从给定的初始姿态生成未来的手势。STP有效地建模了初始姿态和未来手势之间的时空相关性,从而产生时空连贯的姿态提示。一旦我们获得了姿态提示、情感和音频节拍特征,我们将通过transformer架构生成3D协同语音手势。然而,考虑到现有数据集的姿态通常包含抖动效应,这会导致生成不稳定的手势。为了解决这个问题,我们提出了一个有效的目标函数,称为Motion-Smooth Loss。具体来说,我们通过强制手势平滑来对运动偏移进行建模,以补偿抖动的真实值。最后,我们提出了一个以情感为条件的VAE来采样情感特征,使我们能够生成多样的情感结果。大量实验表明,我们的框架优于现有技术,实现了生动且多样的情感协同语音3D手势。我们的代码和数据集将在项目页面发布:https://xingqunqi-lab.github.io/Emotion-Gesture-Web/

英文摘要:

Generating vivid and diverse 3D co-speech gestures is crucial for various applications in animating virtual avatars. While most existing methods can generate gestures from audio directly, they usually overlook that emotion is one of the key factors of authentic co-speech gesture generation. In this work, we propose EmotionGesture, a novel framework for synthesizing vivid and diverse emotional co-speech 3D gestures from audio. Considering emotion is often entangled with the rhythmic beat in speech audio, we first develop an Emotion-Beat Mining module (EBM) to extract the emotion and audio beat features as well as model their correlation via a transcript-based visual-rhythm alignment. Then, we propose an initial pose based Spatial-Temporal Prompter (STP) to generate future gestures from the given initial poses. STP effectively models the spatial-temporal correlations between the initial poses and the future gestures, thus producing the spatial-temporal coherent pose prompt. Once we obtain pose prompts, emotion, and audio beat features, we will generate 3D co-speech gestures through a transformer architecture. However, considering the poses of existing datasets often contain jittering effects, this would lead to generating unstable gestures. To address this issue, we propose an effective objective function, dubbed Motion-Smooth Loss. Specifically, we model motion offset to compensate for jittering ground-truth by forcing gestures to be smooth. Last, we present an emotion-conditioned VAE to sample emotion features, enabling us to generate diverse emotional results. Extensive experiments demonstrate that our framework outperforms the state-of-the-art, achieving vivid and diverse emotional co-speech 3D gestures. Our code and dataset will be released at the project page: https://xingqunqi-lab.github.io/Emotion-Gesture-Web/

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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