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

Tagging refers to a technology that is integrated into a website to measure online traffic. This makes it possible to record and collect all activity on a tagged website.

Tandem spots are two or more ad spots that are broadcast one after the other in quick succession within a commercial break and convey identical or complementary advertising messages.

The target group is a segment of persons demarcated from the base that is formed on the basis of certain characteristics (e.g. socio-demographic characteristics) or combinations of characteristics.

TC score is a measurement device developed by GfK Telecontrol (TC) by which television usage in the AGF Panel was measured from 2009 to the end of 2019. In addition to the former traditional reception paths of cable, terrestrial, satellite (analog or digital) and analog video recorders, the TC score also measures the use of time-shifted viewing by way of digital recording devices such as hard-drive and DVD recorders, as well as EPGs.

The TC UMX system is the currently used measurement system. This system is based on the audio matching technique. In addition, AGF measures streaming usage in households using router technology (see AGF Smart Meter).

TC XL is a measurement device of GfK Telecontrol (TC) that was used in the AGF system until 2009. This method is alternatively known as the “tuner-in-meter method.” It is based on direct frequency measurement.

Technical reach indicates the theoretical total number of a households in an area that are technically capable of receiving a TV broadcaster. However, this indicator disregards the question of whether all households within the technical reach own a TV set or have also tuned in to the broadcaster in question on a reception device in the household.

Telepromotion is a type of continuous advertising programme consisting of editorially prepared advertising for goods or services.

Teleshopping refers to a shopping programme on TV in which viewers have the possibility of directly ordering the presented products and services by telephone or fax or from a special website.

Since January 1995, the television day is defined in the AGF/GfK system as the period of time from 3:00 a.m. to 3:00 a.m. A unique date is assigned to this 24-hour period. Thus, the date change occurs not at midnight, but at 3 in the morning. Among other things, this ensures that all data on TV usage during the television day “yesterday” can be retrieved at the same time during the night and reported in the morning.

Time-delayed viewing refers to TV usage that takes place on the same broadcast day. Since 07/01/2009 it has been part of the AGF system through playback on DVD Blu-ray recorders, DVR and VCR. VOSDAL is the English term for time-delayed usage.

The terms real-time, time-delayed and time-shifted viewing were replaced with live and non-live on 02/25/2015.

Time-shifted viewing refers to television usage that takes place on the 3 days following the broadcast date. It has been part of the AGF system through playback on DVD or Blu-ray recorders, DVR and VCR since 07/01/2009.

For the representation in the evaluation and planning systems, a distinction is made between product-related and recipient-related time-shifted usage:

  • In the product-related view, all usage events up to 3 days after the broadcast date are added to the performance value of the broadcast. This applies equally to programming, advertising and intervals of time.
  • In the recipient related view, the performance value of a broadcaster is calculated as follows: In addition to the live (or real-time) use, all time-shifted usage in the selected time period (maximum 7 days) of the broadcaster in question, thus including older recordings on VCR, PVR, DVD recorders, connected storage media such as USB hard disks, etc., is included in the calculation of the performance value. However, information indicating which recorded programs were used is lost, so that this point of view can only be applied to periods of time.

The terms real-time, time-delayed and time-shifted viewing were replaced with live and non-live on 02/25/2015.

Trailers are announcement spots for programming formats, programs or broadcasters. They run before or after television advertising.

Transponders are signal amplifiers that are used in high-frequency transmission systems with satellites, in terrestrial systems and in optical networks. They receive terrestrial signals in a certain frequency and transmit them terrestrially in another frequency across wide areas.

Triple play refers to a package offering for telephony, Internet access and television. Cable network operators and telephone companies are among the providers of such package offerings.

TTX is an acronym that stands for teletext. It refers to an additional service transmitted by the broadcaster in which available data lines are used to convey additional information such as news, sports or additional programme information.

TTX readers are teletext readers, who are users of TTX with a minimum usage time of one second. Each person who uses the TTX for at least one second consecutively is counted as a reader for this medium. It is calculated in a similar manner as for television usage (but without the condition of minimum usage of one minute consecutively). Thus, it is a net value. The market share for TTX is calculated on the basis of viewing duration, analogously to the calculation of market share for television.

Tuners are reception components in TV sets or radios. They convert the received electromagnetic signals into audio and video information.

TV CONTROL is an evaluation software program of AGF developed by DAP GmbH that integrates the planning and control of TV advertising campaigns into a software. The software provides direct access to the spend volumes of media agencies and databases of gross advertising expenses customarily used in the market. On this basis, advertisers can evaluate their own campaigns and those of competitors.

TV total comprises the total television usage of all persons of a target group, regardless of the broadcaster where this usage occurred. This makes it possible to determine the total number of minutes for which a group of persons watched TV or how many persons who watched TV at all during a program or time interval. TV Total includes time-shifted usage and out-of-home viewing, but not usage on additional devices such as video recorders, game consoles, etc..

TVoD stands for transactional video-on-demand, which refers to video streaming offerings which a user can use against payment of a fee for a limited period of time (24h/48h), after which they are no longer available.