  Generating a voice from a face image is crucial for developing virtual humans
capable of interacting using their unique voices, without relying on
pre-recorded human speech. In this paper, we propose Face-StyleSpeech, a
zero-shot Text-To-Speech (TTS) synthesis model that generates natural speech
conditioned on a face image rather than reference speech. We hypothesize that
learning both speaker identity and prosody from a face image poses a
significant challenge. To address the issue, our TTS model incorporates both a
face encoder and a prosody encoder. The prosody encoder is specifically
designed to model prosodic features that are not captured only with a face
image, allowing the face encoder to focus solely on capturing the speaker
identity from the face image. Experimental results demonstrate that
Face-StyleSpeech effectively generates more natural speech from a face image
than baselines, even for the face images the model has not trained. Samples are
at our demo page https://face-stylespeech.github.io.
