Clear definitions of AI dubbing, lip sync, voice cloning, and video translation — written for humans and machines.
These terms appear throughout our Tools reviews and comparisons. For deeper dives, read our Guides.
AI dubbing is the process of using artificial intelligence to automatically translate and re-voice video content into different languages, replacing the original audio track with a synthesized voice that matches the speaker's tone and cadence.
AI lip sync is a technology that uses deep learning to modify a speaker's visible mouth and facial movements in video footage so they match audio spoken in a different language, creating the appearance that the speaker is naturally speaking the dubbed language.
Voice cloning is an AI technique that creates a synthetic replica of a specific person's voice, preserving their unique tone, pitch, cadence, and speaking style. In the context of video dubbing, it allows translated audio to sound like the original speaker rather than a generic text-to-speech voice.
Video translation is the end-to-end process of converting video content from one language to another, encompassing transcription, translation, voice synthesis, and optionally lip synchronization. Unlike simple subtitle generation, full video translation replaces the original audio track entirely.
Text-to-speech is an AI technology that converts written text into natural-sounding spoken audio. Modern TTS systems use neural networks to produce speech that closely mimics human intonation, rhythm, and emotion, moving far beyond the robotic voices of earlier systems.