Playlist: A list with instructions as to what files are to be displayed and for how
long. The playlist is usually contained in its owna separate file. Another word for
the Ccontent specified by a playlist is called “block.”
Playlog: A file containing information on what content has been shown on a specific
screen. It is a kind of receipt of delivery of the content on the screens. It may
also include other technical status data. A return path is required to collect the
playlogs if this is not done automatically.
Point of purchase (POP): Point of purchase is the location where the customer makes
the purchase decision as in stores or other locations.
Progressive scanning: All lines in a scanned picture are covered in one single scan,
as opposed to interlaced scanning, where the scanning process is divided into two
scans, each covering every other second line.
Quadrature- phase shift keying (QPSK): The most common way of modulating digital
signals in satellite links. The radio wave can use one of four phases to symbolize
the 00, 01, 10, and 11 combinations of two binary digits.
Real-time: Refers to information that is transferred instantly without being stored
in the distribution chain.
Region: Part of the screen that can display some type of content. It may also be
called a “zone.”.
Return Path: An IP connection from the media players or the edge servers to the content
management server. In broadband distribution systems, the return path is obvious.
In multicasting systems, the return path is a separate connection implemented using
a broadband connection such as ADSL or a mobile connection such as GPRS or 3G (UMTS).
RJ45 connector: The most common connector used with twisted-pair cables in Ethernet
RSS: May be a short for either Rich Site Summary, RDF Site Summary, or Really Simple
Syndication. All mean feeds used to distribute continuously updated information on
the Internet. RSS feeds can be used to update news tickers, stock market news, weather
information, etc., in digital signage systems.
SCART connector: European standardized connector for analog composite and component
video signals. The connector also carries analog stereo audio. (SCART stands for
Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs.)