Institute for Telecommunication Sciences / Research Topics / Video Quality Research / Guides and Tutorials / Video Resources / Tools for Video Quality in Public Safety / Guide to Defining Video Quality Requirements / Generalized Use Class Aspects / VQiPS Usage Timeframe
Specifies whether the video will be used in real-time or will be recorded. Sometimes the same camera is used for both live surveillance and recorded evidence. In this case, it is important to examine both uses separately to develop requirements.
Live video is used for real-time applications such as, live surveillance or live tactical control of a situation.
Recorded video is stored for later use such as, for evidence in a case. Recorded video carries with it the ability to rewind, freeze, zoom, and further process the capture. Conversely, live video that is not stored carries no capture progress control and is used only in real-time.