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

In TV planning, ranking sequences are rankings of broadcasters, timelines or commercial breaks by CPM-C, reach or affinity for the purpose of benchmarking in the relevant target group. They are primarily used to select suitable commercial breaks for a campaign.

The rate groups in TV have a unique indication per broadcast day. They consist of 4 always fully available indications. The coding is mandatory for advertising. In addition, the coding can also be assigned for other types of programmes such as sponsoring or trailers.

Rate type: 2-digit (allocation of the advertising islands to different areas which define the type of advertising)

Price group: 2-digit (determines the spot price in the advertising island, is subordinate to the tariff type)

Hour: 2-digit (planned broadcast hour of the advertising island)

Block number: 2-digit (internal number assigned by the broadcaster, usually consecutive within an hour / environment)

The following classification applies:


Standard advertising, general


Standard advertising


Standard rate sport


Standard rate children


Event advertising


Event rate Sport


Total advertising


Special forms of advertising


Broadcaster-internal coding

Price information for rate types 1-30 is stored in the reference systems. Special advertising formats are assigned to rate types 31 and above so that they are not included in the average calculation of total advertising. rate types 81-99 contain internal broadcaster information that does not refer to advertising block data and is only licensed for the respective broadcaster.

Rating is a synonym for the average market share of a programme or commercial break, expressed as a percentage (rating). This term is not to be confused with reach.

Ratings refer to the average market share of households who watched a programme at a given time. Ratings are stated in percent.

Reach means the net coverage of a programme, programme list or campaign. The term is not to be confused with rating.

AGF distinguishes between four different reception levels: IPTV, satellite, cable and terrestrial. A household is assigned to a level hierarchically, meaning that if more than one reception level is present, a household is always assigned to the highest level, IPTV being the highest level, followed by satellite, cable and terrestrial. Therefore, a household that receives programmes via IPTV is always assigned to the IPTV level even if other reception options are available in the household. According to AGF’s definition, the satellite level includes all households that receive via satellite, but not via IPTV. A household is assigned to the cable level if it receives via cable, but not via IPTV or satellite. Thus, the terrestrial level includes all households that only have a DVB-T reception possibility.

Reception levels are taken into consideration for both recruitment and weighting. Regardless of the assignment of a household to a reception level, the other available reception levels in the household are also entered into the AGF system by the technician and form part of the AGF data.

Reception potential indicates the number of persons or households who receive a broadcaster via terrestrial transmission, cable, satellite or IPTV. A broadcaster is deemed to be receivable if it was switched on at least once for one second in a panel household. By virtue of this definition, the reception potential of a broadcaster is always smaller than its technical range because actual reception, not all potential households in the distribution area, forms the basis for the reception potential.

Although the reception potential is largely resistant to fluctuations by reason of its definition, slight changes can arise in a few cases as a result of panel entries and exits, maintenance, cable network or transponder switch-offs or reassignments, and weighting processes.

Reception potential 60/60 indicates the number of persons or households that switched on a broadcaster for at least 60 consecutive seconds in the last 60 days. Thus, the reception potential 60/60 is subject to temporal fluctuations based on actual use.

Households are recruited for the AGF panel in a two-stage process: Based on a representative sample, households/individuals are contacted and a short telephone interview is conducted to determine whether the household meets the target specifications for the AGF panel in terms of socio-demographic characteristics and reception situation (CATI screening). To a limited extent, initial contacts for certain target groups are also achieved online. If a household is basically suitable, a personal recruitment interview (face to face) is conducted for the AGF panel. During this recruitment interview, further information about the household is collected in the same way as in the structural survey. After successful recruitment, the measurement equipment is installed and the household is included in the daily reporting.

A red button application is an automatically executed application within the meaning of the HbbTV standard. It is transmitted together with a broadcast programme and launches in the background insofar as it is signaled as “auto start.” These applications often display a red button on the screen, indicating that the application can be activated and visibly displayed by pressing on the red button. Such an application is typically the portal site of a broadcaster that provides additional information and services to the viewer such as access to a media library.

Reliability refers to the reliability and measurement precision of an applied measurement system. In the AGF system, the ICC serves the purpose of a reliability check.

The reporting basis refers to the number of all persons – weighted (potential) or unweighted (number of cases) on which an evaluation is based. These persons usually represent the universe of the AGF Panel, but they can also be a smaller group, depending on the definition. In evaluations, the reporting basis acts as a prefilter for the target group.

The reporting ratio refers to the proportion of all retrievable panel households represented by reporting panel households whose data is transmitted every day, usually overnight between 3:00 a.m. and 5:00 a.m., via the measurement systems to the central system at GfK. The minimum number for successfully daily reporting households is 5,400.

Representativeness refers to the correspondence between sample and universe in the relevant structural characteristics. The AGF Panel is representative of the population of the Federal Republic of Germany and maps the usage of video in households.