Reference
Glossary.
The vocabulary of AI training data, defined plainly.
Chain of title
The documented trail showing who owned a piece of material and what rights transferred at …
Provenance
The verifiable record of where data came from and how it was collected and licensed — the …
Rights-cleared
Data for which the owner has granted, in writing, the right to use it for AI training, wit…
Voice and likeness consent
Permission from an identifiable person to use their voice or appearance for AI training or…
Diarization
The task of determining who spoke when in an audio recording, segmenting speech by speaker…
ASR (automatic speech recognition)
Technology that transcribes spoken language into text; trained on audio paired with accura…
TTS (text-to-speech)
Technology that synthesizes natural-sounding speech from text; trained on clean, consisten…
RLHF
Reinforcement learning from human feedback — training a model using human preference judgm…
Egocentric video
First-person video captured from a wearable or head-mounted camera, showing a task from th…
World model
A model that learns to predict how an environment evolves, often trained on long, continuo…
IMU data
Inertial measurement unit data — motion and orientation streams from accelerometers and gy…
Agentic trajectory
A recorded sequence of the steps a human takes to complete a task, used to train AI agents…
Phoneme coverage
How completely a speech dataset represents the distinct sound units of a language — import…
Crosstalk
Overlapping speech where multiple people talk at once; common in natural conversation and …
Code-switching
Alternating between two or more languages within a conversation or sentence; common in mul…
Not in the crawl
Material that never entered a public web crawl, so a model has not already seen it — worth…