318 GLOSSARY Day parting: Dividing a day into smaller time segments, displaying differ- ent messages and using different playlists. (See scheduling.) Demultiplexer (demux): A device that splits a common digital stream that contains several streams related to audio, video, or other data into its original components. Digital cinema (D-cinema): The highest quality of digital cinema concepts. This technology replaces the analog film in all respects and requires signals of studio quality. Digital signage: A medium to produce dynamic electronic information, entertainment, and advertising in shops and public places (possibly also in homes). Depending on the distribution method, digital signage may provide non-real-time as well as near-real-time and real-time informa- tion. Digital signage systems may also include interactive customer ter- minals where the user may decide what content is to be shown on the screens. Digital signage content may be based on separate content files that are combined in an individual way on each screen. Digital signage broadcasting: A new revolutionary medium that is cre- ated by combining digital signage techniques with the broadcast media. Digital signage broadcasting has the potential to replace most existing electronic and printed media. Digital signage network: Any kind of digital signage application where there are several media players at several locations. The network may be administrated using manual distribution of media, broadband net- working, satellite broadcasting, or any combination of these distribution methods. Digital Video Interface (DVI): The digital interface used mostly with com- puter graphics cards and computer screens but also in older flat-panel TV sets and monitors. Display device: Any kind of device for displaying content. From the early technology of cathode-ray tubes, the number of display devices has increased to include plasmas, LCD screens, various computer-type TFT screens, OLEDs, projection systems, and electronic ink techniques. Distribution server: Another word for content distribution or content manage- ment server. This term is used in digital signage broadband networking, where the content management server handles broadband distribution to each media player as well as to store and manages content. Downlink signal: The signal that is received from a satellite. Edge server: A local server that retrieves content from the content manage- ment server and serves as a central storage of content in a shop or other location where there is a larger number of media players. Also known as site server and media server. Electronic cinema (E-cinema): A more modest level of D-cinema. E-cinema is used for preshow advertising and other cinema applications where moderate quality is accepted.