From A for AGF Videoforschung to Z for zapping, the most important technical terms in video research are explained here.

UMTS is an acronym that stands for Universal Mobile Telecommunications System, a transmission technology that allows for a higher transmission rate than GSM and also provides access to the Internet. Data transmission with UMTS was a widely used standard for 3G mobile networks.

The universe comprises all persons represented by the sample of a study. In the AGF Panel, the universe is defined as the resident population of the Federal Republic of Germany in private households with at least one TV set in use and a German-speaking Main Income Earner (MIE).

The usage base is a data filter in the TV Scope that makes it possible to filter certain usage data as the evaluation basis for counts, thereby changing TV total.

The usage share is a fact that indicates the share of the total viewing volume represented by the viewing volume in an output cell of a cumulation step in the evaluation.

USB is an acronym that stands for Universal Serial Bus. It refers to a standard for the connection of external devices such as hard drives or USB sticks to computers and modern TV sets.

Weighted number of persons, households that have met the minimum usage condition for the analysis element. A user is counted only once regardless of their contact frequency.

User-centric measurement is an approach used for measuring online reach values. The measurement refers to the user communities of a website. It is performed through the use of cookies, for example.