[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"glossary-digital-human::en":3,"gloss-cluster-digital-human::en":20,"gloss-next-digital-human::en":9},{"slug":4,"category":5,"name":6,"definition":7,"meta_desc":8,"faq":9,"schema_markup":9,"related":10},"digital-human","output","Digital Human","A digital human is a persistent, interactive, AI-driven avatar — combining a visual presence (photorealistic or deliberately stylized), real-time voice synthesis, lip sync, and a conversational AI reasoning backend (typically an LLM with retrieval-augmented context about a specific domain or persona) — designed to hold live, two-way conversations with a user rather than simply deliver a pre-scripted, one-way video. This distinguishes a digital human from avatar-generation-for-video products: avatar generation typically produces a finished, non-interactive video asset from a fixed script, while a digital human runs live, generating its responses, voice, and facial\u002Flip animation in real time as a conversation unfolds — architecturally it's a full pipeline of speech-to-text (hearing the user) → LLM reasoning (deciding what to say) → text-to-speech (generating the voice) → lip sync\u002Ffacial animation (rendering the response), all orchestrated with tight latency budgets since a conversational partner that pauses for 5+ seconds between turns feels broken. Platforms like Soul Machines, NVIDIA's ACE, and D-ID's Agents package this real-time pipeline as an embeddable widget or SDK, handling the difficult latency-orchestration work internally so a product team can drop in a working conversational avatar without independently building and tuning the STT\u002FLLM\u002FTTS\u002Fanimation pipeline and its associated infrastructure themselves. Why it matters for SaaS builders: digital humans are the emerging interface layer for customer service (a visual, conversational alternative to a text chatbot), virtual sales\u002Fbrand ambassadors on e-commerce sites, and interactive training simulations (practicing a difficult conversation with an AI-driven \"customer\" or \"patient\" persona). The engineering challenge is materially harder than any single output type covered elsewhere in this glossary because of the real-time, low-latency, multi-model-orchestration requirement — most builders integrate a vendor's full digital-human SDK rather than assembling the STT\u002FLLM\u002FTTS\u002Flip-sync pipeline themselves for a live product. A concrete worked example — a retail SaaS adding a \"virtual stylist\": (1) a shopper opens the site's chat widget and it loads a digital-human avatar instead of a text-only bot; (2) the shopper speaks (or types) \"I need an outfit for a summer wedding\"; (3) STT (if voice) converts the query to text, which is sent with the store's product catalog as retrieval context to an LLM; (4) the LLM's text response streams to a low-latency TTS engine while simultaneously driving the avatar's lip-sync and expression in real time, so the avatar visibly \"speaks\" its product recommendations back to the shopper within roughly 1-2 seconds of the query.","A digital human is an interactive AI avatar for live conversation, combining a visual face, real-time voice, and a conversational AI backend.",null,[11,14,17],{"slug":12,"name":13},"agent","Agent",{"slug":15,"name":16},"avatar-generation","Avatar Generation",{"slug":18,"name":19},"lip-sync","Lip Sync",[21,25,29,33,36,40,43,44,47,50,53,56],{"slug":22,"category":5,"name":23,"updated_at":24},"abstention","Abstention","2026-08-24T03:30:02+00:00",{"slug":26,"category":5,"name":27,"updated_at":28},"ai-copywriting","AI Copywriting","2026-08-24T02:46:38+00:00",{"slug":30,"category":5,"name":31,"updated_at":32},"ai-watermarking","AI Watermarking","2026-08-24T02:46:37+00:00",{"slug":34,"category":5,"name":35,"updated_at":32},"aspect-ratio-control","Aspect-Ratio Control",{"slug":37,"category":5,"name":38,"updated_at":39},"audio-generation","Audio Generation","2026-08-24T02:46:36+00:00",{"slug":41,"category":5,"name":42,"updated_at":32},"audio-super-resolution","Audio Super-Resolution",{"slug":15,"category":5,"name":16,"updated_at":39},{"slug":45,"category":5,"name":46,"updated_at":39},"background-removal","Background Removal",{"slug":48,"category":5,"name":49,"updated_at":32},"batch-image-generation","Batch Image Generation",{"slug":51,"category":5,"name":52,"updated_at":28},"brand-voice","Brand Voice",{"slug":54,"category":5,"name":55,"updated_at":28},"cfg-scale","CFG Scale (Classifier-Free Guidance)",{"slug":57,"category":5,"name":58,"updated_at":32},"character-consistency","Character Consistency"]