Glossary

3GP (3GPP file format) is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for 3G UMTS multimedia services. It is used on 3G mobile phones but can also be played on some 2G and 4G phones. 3G2 (3GPP2 file format) is a multimedia container format defined by the 3GPP2 for 3G CDMA2000 multimedia services. It is very similar to the 3GP file format but consumes less space & bandwidth also has some extensions and limitations in comparison to 3GP. (Source: Wikipedia 16.11.2021 3gp)

Audio Video Interleave (AVI) is a video container format introduced by Microsoft and which is based on RIFF (Resource Interchange File Format) introduced for Windows 3.1. Audio Video Interleave refers to the way that audio and video data are saved. (Source: Wikipedia 19.05.2021)

Comma-separated values is a file format which stores tabular data in plain text form.

Dialed Dual Tone Multi Frequency keys represent dialing signals on the analog connecting cable of the telephone. This is a method to transmit the phone number to the telephone network or to a PBX.

Key performance indicator (KPI)

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. (Source: Wikipedia 16.11.2021) The only filename extension for MPEG-4 Part 14 files as defined by the specification is .mp4. MPEG-4 Part 14 (formally ISO/IEC 14496-14:2003) is a standard specified as a part of MPEG-4.

The M4V file format is a video container format developed by Apple and is very similar to the MP4 format. The primary difference is that M4V files may optionally be protected by DRM copy protection. (Source: Wikipedia 16.11.2021)

QuickTime File Format (QTFF) is a computer file format used natively by the QuickTime framework. Filename extension: .mov, .qt (Source: Wikipedia 16.11.2021 QuickTime_File_Format)

With regard to audio compression, MP3 uses lossy data-compression to encode data using inexact approximations and the partial discarding of data. MP3 compression works by reducing (or approximating) the accuracy of certain components of sound that are considered (by psychoacoustic analysis) to be beyond the hearing capabilities of most humans. The remaining audio information is then recorded in a space-efficient manner.

MP4 is a video container format. MP4 file format is based on Apple QuickTime file format. MP4 files allow saving multimedia content as several audio and video tracks as well as subtitles, 2D and 3D graphics. This content may be replayed locally with a dedicated software or streamed via a network. (Source: Wikipedia 07.02.2020)

Time to live is the retention period indicating for how long a recording is supposed to be held available in the system.

WAVE file format is a container format to digitally save audio data and is based on the Resource Interchange File Format (RIFF) defined by Microsoft for Windows. (Source: Wikipedia 23rd February 2021)

Component of a graphical dialog system. Consists of a visible window and an invisible object which saves the configuration of the component. Interacts with the user and displays information which is updated regularly. (Source: https://de.wikipedia.org 15.07.2021)

Windows Media Video (WMV) is a series of video codecs and their corresponding video coding formats developed by Microsoft. It is part of the Windows Media framework. (Source: Wikipedia 16.11.2021 Windows_Media_Video) Microsoft: File types supported by Windows Media Player, see In-detail information on supported file types. (Source: Microsoft 16.11.2021 https://support.microsoft.com/de-de/topic/von-windows-media-player-unterst%C3%BCtzte-dateitypen-32d9998e-dc8f-af54-7ba1-e996f74375d9)

[MS-XLSX]: Excel (.xlsx) extensions for Office Open XML Spreadsheet ML file format. (15.11.2021, source: https://docs.microsoft.com/en-us/openspecs/office_standards/ms-xlsx/2c5dee00-eff2-4b22-92b6-0738acd4475e )

Extensible Markup Language is a human-readable and machine-readable language which defines a set of rules for encoding documents.

ZIP is an archive file format that supports lossless data compression. A ZIP file may contain one or more files or directories that may have been compressed. (Source: Wikipedia 10.11.2021)