Fidelity
lastmod 2026-05-27created 2026-05-272 edits
Fidelity means ‘faithfulness’ or ‘accuracy’, and 'improved fidelity' refers to how much more closely and realistically something reproduces the original (a real object, sound, data, etc.).
Meaning by field
The specific meaning depends on the field where it is used, as follows.
IT, games, graphics (visual quality)
Refers to how faithfully and sharply the textures, lighting effects, resolution, etc. shown on screen match actual reality.
Example: selecting Fidelity mode (quality mode) in game settings renders graphics more lavishly and precisely, but on-screen motion (frame rate) may drop somewhat.
Audio, sound (high sound quality)
Refers to how accurately speakers or earphones reproduce the original audio source without distortion or noise.
Example: Hi-Fi (High-Fidelity) audio equipment provides high fidelity close to the original sound, delivering a vividness that feels like being in a concert hall.
AI, data analysis (prediction accuracy)
A metric indicating how closely an AI model's predictions match actual reality (the ground truth).