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 / VQiPS Generalized Used Class Aspects

VQiPS Generalized Used Class Aspects

1. Identify
2. Generalize
3. Understand
4. Match


A use class shares certain important aspects of specific use cases that are common to other use cases, allowing you to make generalizations between them. All use cases have an analyst and a scene under observation. For each of your use cases, apply the Generalized Use Class Questionnaire to derive generalized aspects from the analyst’s intended use of the video (Use Characteristics) and what is in the scene under observation (Scene Content).

Generalized use class aspects.
For each use case, determine the specific value for each aspect. The combination of common values across use cases will form your generalized use classes.

Each of the following generalized use class aspects can impact the quality of the video content as seen and used by the analyst. Click any of the following generalized use class aspects or those in the figure for aspect information.

Use Characteristics

Scene Content

Try the Recommendations Tool