VQiPS: Usage Timeframe

Guide to Defining Video Quality Requirements

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| Getting Started | Use Cases | Use Classes | GUC Aspects | Usage Timeframe | Discrimination Level | Target Size | Motion | Lighting Level | GUC Questionnaire |

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Usage Timeframe

Definition
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 Usage
Live video is used for real-time applications such as, live surveillance or live tactical control of a situation.

Future Usage
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.

Use Characteristics
Consider: In what timeframe will the video be used? As in, will the video be used in real-time or will it be recorded?

Use Timeframe	Characteristic	Example
The video will be viewed at the same time it is being shot	Live or real-time	Security monitor being viewed by security personnel
The video will be saved and capable of being played back	Recorded	Forensic video

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