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Playout

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In broadcasting, playout is a term for the transmission of radio or TV channels from the broadcaster into broadcast networks that delivers the content to the audience. Those networks can consist of terrestrial transmitters for analogue or digital radio and TV, cable networks or satellites (either for direct reception, DTH, or intended for cable television headends).

The playout happens in master control in a playout area, which can be either situated in the central apparatus room or in purposely built playout centres, which can be owned by a broadcaster or run by an independent specialist company that has been contracted to handle the playout for a number of channels from different broadcasters.

Some of the larger playout centres in Europe, Southeast Asia and the United States handle well in excess of 50 radio and TV „feeds“. Feeds would often consist of several different versions of a core service, often different language versions or with separately scheduled content, such as local opt outs for news or promotions.

Centralcasting is multi-channel playout that generally uses a broadcast automation systems with broadcast programming applications. These systems generally work in a similar way, controlling video servers, video tape recorder (VTR) devices, Flexicarts, audio mixing consoles, vision mixers and video routers, and other devices using a serial communications 9-Pin Protocol (RS-232 or RS-422). This provides deterministic control, enabling frame accurate playback, Instant replay or video switching. Many systems consist of a front end operator interface on a separate platform to the controllers – e.g. a Windows GUI will present a friendly easy to use method of editing a playlist, but actually control would be done on a platform with a „real time“ operating system such that any large scale playlist amendments do not cause any delays to device control.

Most broadcast automation systems will have a series of common device drivers built in, for example Sony VTR control (aka Sony Serial), Louth Video Disk Control Protocol (VDCP, a proprietary communications protocol), General Purpose Interface (GPI), or Grass Valley Group M21 Master Control. This ensures that a broadcast automation system bought „off the shelf“ will at least be able to ingest and playout content, although may not be able to take advantage of more efficient methods of control. Most server, and especially most digital on-screen graphic and character generator (CG) manufacturers will have a specific device driver for their device, with increasing degrees of complexity, and different automation companies will include these drivers to enhance their product or to fit a customers need.

This is the „traditional“ method of Playout Automation, where there are multiple devices. Modern automation systems use the Automated Playout method, which is where the broadcast server fulfills the functions of the multiple devices, and is a self-contained system (see Channel in a Box section below).

Playout will usually involve an airchain of devices which begin with content, typically stored on video server, and ultimately an output, either as an (Asynchronous serial interface) (ASI) / IP or (Serial Digital Interface) (SDI) for on pass to a distribution company.

The devices in the chain depend on the service required under the contact with the Channel. Typically a standard television channel would require a Master Control Video switcher, and/or a Video router to allow switching of live sources. This video switcher may include other functions such as keying (graphics) (also known as Down Stream Keyers), Audio Overs for mixing in voice overs (VO) or announcements, and facilitate transitions between events, such as a fade through black or crossfade (also known as mix).

Other devices include:

Graphics inserters – At least one Graphics inserter, or one with several layers. This allows for Station identification/Logo/Digital on-screen graphic (Dog or Bug) insertion, and can also be‘ used for end credits sequences, coming next graphics or programme information straps

Subtitling inserters – This can be either closed or open – i.e. in vision as a graphic for all to see, or closed either as an MPEG stream item, Closed Captioning or World System Teletext.

Audio servers – An audio playout system would provide scheduled voiceovers

Aspect Ratio Converters – These alter the picture shape or send an embedded signal to allow the material format to be displayed correctly on a particular feed (e.g. Widescreen on a standard non-widescreen Analogue terrestrial feed)

Some of these more advanced devices require information from the playlist, and so do not tend to use an RS422/232 driver, but a complex XML based system which allows for more complex metadata to be passed, e.g. a „Now“ or „Next“ Graphic can be created from a template using text information from the playlist.

In recent years there has been a move to replicate all of these functions in a single system, often called a „channel in a box“ solution. These are often cheaper to introduce and allow for a more scalable Playout system.

Playout is one of the basic infrastructure of a playout center. Mostly called as channel in a box server, but basically composed of playout servers with integrated graphics and IP or ASI output. Aim of playout centers is mostly to serve customers a simple file based television facility. Up-link and Channel in a box servers simply provide the facility latest football jersey.

A common workflow is for the broadcast automation system to have a recording schedule to ingest material from a satellite or line feed source and then time-shift that material based on a playlist or schedule.

The playout schedule will have been created in the customer’s broadcast programming scheduling system and exported into a format suitable to be used in the Playout system. There is a move to SMPTE-22, known as Broadcast Exchange Format (BXF) to try to standardise the messaging involved in this interaction.

The resulting playlist is „loaded“ into the appropriate channel of the broadcast automation system in advance of the transmission time. Various processes will take place to ensure the content is available on the correct servers for playout at the right time small water bottles, typically this involves advance requests to move material from deep storage such as Tape Archives or FTP Clusters to Broadcast Video servers, often using FTP.

On playing out the material, the audio and video signals are usually transported from the playout area to the network via a studio/transmitter link (STL), which may be fibre backlink, microwave or satellite uplink.

Playout is often referred to as Presentation or Transmission (TX), and is under control of an automatic transmission system.

Ulf-Dieter Klemm

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Ulf-Dieter Klemm (* 22. Juni 1946 in Höxter) ist ein deutscher Autor, Übersetzer sowie Diplomat und war u small water bottles.a. Botschafter in Marokko (2008–2011).

Nach dem Abitur studierte Klemm von 1964 bis 1970 Rechtswissenschaften an der Freien Universität Berlin, der Universität Montpellier sowie der Ruprecht-Karls-Universität Heidelberg und legte sein Erstes Staatsexamen ab. Von 1975 und 1977 war er als Assistent am Lehrstuhl für öffentliches Recht an der Ruprecht-Karls-Universität Heidelberg und als wissenschaftlicher Referent am dortigen Max-Planck-Institut für ausländisches öffentliches Recht und Völkerrecht tätig und legte seine Promotion zum Doktor der Rechte mit einer Dissertation zum Thema Die seewärtige Grenze des Festlandsockels goalie gloves. Geschichte, Entwicklung und lex lata eines seevölkerrechtlichen Grundproblems ab.

1977 trat Klemm in den Auswärtigen Dienst ein glass refillable water bottles. Von 1979 bis 1982 war er Ständiger Vertreter des Generalkonsuls in Porto Alegre und von 1986 bis 1990 Kulturreferent an der Botschaft in Griechenland Month Necklace. Nach verschiedenen Tätigkeiten im Auswärtigen Amt und an der Botschaft in Japan wurde er Botschafter in Mosambik, war von 2005 und 2008 Beauftragter für Infrastruktur, Sicherheit und Verwaltungsreform im Auswärtigen Amt und von 2008 bis 2011 Botschafter in Marokko.

Frank Rynne

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Frank Rynne is an Irish-born singer, record producer, art curator, film-maker fuzzy socks wholesale, writer, and historian the coolest football uniforms. He has played in three bands Those Handsome Devils in 1984, The Baby Snakes (1985-1994) and Islamic Diggers (1996- ). He has produced three CDs of Moroccan folk music by the Master Musicians of Joujouka. In 1992 Rynne co-organised The Here to Go Show, an international art show featuring the works of William S football jersy. Burroughs and Brion Gysin and, with fellow organisers Joe Ambrose and Terry Wilson, co-wrote Man from Nowhere. He co-produced the CD 10%: file under Burroughs (1996).

Rynne first came to national prominence in Ireland playing rhythm guitar with Those Handsome Devils, a Dublin-based rockabilly band with a large national following. In 1985 he formed The Baby Snakes, a rock’n’roll band strongly influenced by The New York Dolls and Alex Chilton. The Baby Snakes released an EP and two LPs, This City Sucks and Sweet Hunger, before moving to Brixton, London in 1988.

Their third and final LP was produced by Sex Pistols audio engineer, Dave Goodman. In 1990 small water bottles, the band recruited drummer Nigel Preston, a founder member of The Cult. After Preston’s death in 1992, Rynne began to work on projects related to Burroughs and Gysin.

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