Phoneme
In short: A phoneme is the smallest unit of speech sound in a language that maps to specific mouth shapes used in lip sync generation.
About Phoneme
Phonemes are the fundamental audio units that lip sync systems analyze to determine which mouth shapes to render. The English language contains roughly 44 phonemes, each producing a distinct articulatory gesture.
AI lip sync models extract phoneme sequences from audio input, either directly from the waveform or via intermediate representations like mel spectrograms, and then translate these into the corresponding visemes for video generation. Accurate phoneme detection is critical for natural-looking lip sync across different languages.
How Phoneme Connects to Lip Sync
Phoneme relates to several other concepts in the AI lip sync pipeline: Viseme , and Mel Spectrogram .
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