'''Programpresentatör''' är en person som presenterar program i radio och tv. Den äldre beteckningen "hallåa" eller "hallåman" kommer från tiden före tv, då man i radion vid dagens sändningsstart behövde anropa övriga landet och gjorde detta med ett "hallå, hallå". Programpresentatörer har funnits i de flesta radio- och tv-kanaler i Sverige, såväl i som utanför bild.

==Historik==
När reguljära tv-sändningar började sprida sig i Europa under 1950-talet bestod presentation av tv-program av en programpresentatör som syns i bild. Bakom sig brukade programpresentatörer ha en skärm eller någon slags skynke bakom sig. Ibland kunde även kanalens logotyp ses bakom hallåan. Övriga presentationselement som var vanligt förekommande var klockor, någon slags kanal-ID och skyltar. Skyltar och kanal-ID kunde skapas genom att man filmade skyltar eller fotopositiv med stillbilder ur programmen. Klockor, och ibland även kanal-ID, genererades ofta genom mekaniska modeller som filmades. Kanal-ID kunde ibland ackompanjeras av en fanfar, och vissa kanaler skapade animerade kanalidentiteter.

Med tiden förändrades presentationen. Trailrar, korta informationsfilmer om kommande program, blev vanligare allteftersom mer effektiva videosystem kom. De synliga programpresentatörerna började också försvinna. BBC1 var tidigt ute och slutade med synliga hallåor på 1960-talet. De flesta övriga kanaler följde efter under 1980- och 1990-talet. Många kanaler slutade använda hallåor helt och hållet. För de kanaler som behållde synliga hallåor började man under 1980- och 1990-talet använda chroma key-teknik för att skapa bakgrunder. 

År 2006 är det mycket få tv-kanaler som fortfarande har de traditionella synliga presentatörerna. Fenomenet är så gott som utdött ur ett internationellt perspektiv. Sverige och Norge är dock unika i detta sammanhang eftersom "hallåan" fortfarande är vanligt förkommande här. Bland de tv-kanaler som fortfarande använder finns nästan uteslutande nordiska, flera svenska, såsom UR och Kunskapskanalen, norska NRK samt nordirländska UTV.

Programpresentatörer är fortfarande vanliga i vissa länder, exempelvis Storbritannien och Irland där alla större kanaler använder hallåor som talar över en slags ID-film. I andra länder, såsom Frankrike, är hallåor relativt ovanligt. På mindre kanaler är programpresentationen försinpelad.

Orsaken till att synliga programpresentatörer tas bort är ofta för att det inte ansetts tidsenligt, men också att det är mer resurskrävande att ha en hallåa i en liten tv-studio än att bara ha en röst.

== Svenska programpresentatörer ==

=== SR P1 ===
*Pia Gadd
*Margareta Leijonhufvud
*Michael Levy
*Christofer Murray
*Peter Nilsson
*Susanna Nordell
*Sven Olof Persson
*Sten Petri
*Ulf Schönberg
*Elisabet Thorborg

A '''continuity announcer''' is a broadcaster whose voice (and, in some cases, face) appears between radio or television programmes to give programme information.

Continuity announcers tell viewers and listeners which channel they are watching or listening to at the moment (or which station they are tuned to), what they are about to see (or hear), and what they could be watching (or listening) if you changed to a different channel operated by the broadcaster.  At the end of programmes, they may read out information about the previous programme, for example who presented and produced it, relay information on information or merchandise relating to the show, or to provide details of organisations who may offer support in relation to a storyline or issue raised in the programme.  Continuity announcers may also play music during intervals and give details of programmes later in the day. If there is a breakdown, they make any necessary announcements and often play music for its duration.

==Usage==
===Television===
Television continuity announcements typically take one of two forms:
* '''Out-of-vision''', where only the announcer's voice is heard, either over the end sequence of a programme or on-screen graphics. With appropriate training in sound and vision mixing, this can be achieved with a single person acting as both voice and controller.
* '''In-vision''', where the announcer seen delivering the announcement on-screen. This typically requires a number of people in a small studio, including sound engineers, vision mixers, and occasionally camera operators. Modern installations with motorised cameras can reduce this to two &mdash; the presenter, and a technical assistant to perform the "backstage" functions such as adjusting the camera and mixing.  

Presently, the following European television channels use in-vision announcers:
* Belgium: één<ref>[http://ww.youtube.com/watch?v=3lMwRjrSzwU] één in-vision continuity (You Tube), accessed 25 February 2008</ref><ref>[http://www.youtube.com/watch?v=SP9MZiXVwww] één in-vision continuity (You Tube), accessed 25 February 2008</ref>, Ketnet, VT4 and VIJFtv<ref>[http://www.youtube.com/watch?v=uRZTqKLeX9E] VIJFtv in-vision continuity (YouTube), accessed 25 February 2008</ref><ref>[http://www.youtube.com/watch?v=fxszy55Wtkg] VIJFtv in-vision continuity (YouTube), accessed 25 February 2008</ref>
* Finland: YLE TV1 and YLE TV2
* Ireland: TG4<ref>[http://www.thetvroom.com/irish/tg-4-99-05.html] The TV Room: TG4 Christmas Presentation 2007, accessed 25 February 2008</ref>
* Italy: Rai Uno, Rai Due and Rai Tre
* Norway: NRK1<ref>[http://www2.tv-ark.org.uk/International/norway/nrk1.html] TV Ark: NRK1 presentation, accessed 26 February 2008</ref>
* TV4<ref>[http://www.youtube.com/watch?v=wCSQm8ZWXEI] TV4 in-vision continuity, 2004 (YouTube), accessed 26 February 2008</ref><ref>[http://www.youtube.com/watch?v=5ctKj-Jv0vw] TV4 in-vision continuity (YouTube), accessed 26 February 2008</ref>
* United Kingdom: UTV<ref>[http://www.youtube.com/watch?v=ya62UifJHpk] UTV in-vision continuity (YouTube), accessed 25 February 2008</ref><ref>[http://www.youtube.com/watch?v=mDDm5yW53dA] UTV in-vision continuity (YouTube), accessed 25 February 2008</ref>, the CBBC Channel<ref>[http://www.youtube.com/watch?v=4Xoo9hRn1cs] CBBC in-vision continuity (YouTube), accessed 25 February 2008</ref><ref>[http://www.youtube.com/watch?v=ewmc0XG0K2Y] CBBC in-vision continuity (YouTube), accessed 25 February 2008</ref>, CBeebies and BBC Three<ref>[http://www.youtube.com/watch?v=w6KEaNQw4xw] BBC Three in-vision continuity (YouTube), accessed 25 February 2008</ref>

===Radio===
With most radio stations now broadcasting only music, few networks retain continuity announcers. Exceptions include talk stations such as SR P1, newsreaders.

==In different countries==
===Canada===
In Canada, CBC Television used in-vision announcers to 'host' primetime programming from 2001 to 2006. The host would appear before a program to describe the forthcoming episode. As the credits rolled, the announcer would describe upcoming episodes of the series, then introduce the next program at the top of the hour. The evening's host changed daily. Usually, the host was appearing in a major upcoming program the same week, giving the appearance that the host is promoting not only the next program in the evening but his or her own upcoming show. Sometimes CBC Radio newcasters or program hosts would appear as the evening TV hosts. The initiative, sometimes known as "Hosted Prime", only covered the CBC's core evening block (8:00 to 10:00 p.m. local) as opposed to programs in the 7:00 hour, and would not normally appear during the summer.

Radio 2.

OMNI Television in Toronto has used in-vision continuity announcers for the past 10 years or so. These "interstitial" segments fill in the time left in programming due to the different break structure of American TV programming, that cannot be filled by commercials in Canada due to Canadian broadcast regulations regarding the number of minutes of commercials allowable per hour. The segments range from 30 seconds to 2 minutes, and in addition to announcing the station and the programs coming up, the announcers will talk about other programming, station contests, quirky news or celebrity gossip.

Continuity announcements on Citytv are voiced by Mark Dailey. The original continuity announcer was Dan Aykroyd.

Other Canadian stations will fill this time in by a news update or a teaser about news stories.

===Ireland===
All domestic terrestrial channels in Ireland make use of continuity announcers, mainly to introduce programmes, promote forthcoming programmes, provide information relating to the programme just broadcast and, in the case of RTE's two channels, cross-promote programmes on the other channel.

RTE One used in-vision continuity announcers until at least the mid 1990s<ref>[http://www.thetvroom.com/irish/rte-1-04-01.html The TV Room: RTÉ One Presentation 1993-1995]; accessed 26 February 2008</ref> and in-vision continuity was briefly reprised in the late 1990s for overnight programmes.<ref>[http://www.thetvroom.com/irish/rte-1-06-01.html The TV Room: RTÉ One Presentation 1998-2000]; accessed 26 February 2008</ref> 

RTE Two used in-vision continuity announcers from its launch in November 1978 to at least 1986.<ref>[http://www.thetvroom.com/irish/rte-2-01-01.html The TV Room: RTÉ Two Presentation 1978-1984]; accessed 26 February 2008</ref><ref>[http://www.thetvroom.com/irish/rte-2-02-01.html The TV Room: RTÉ Two Presentation 1984-1987]; accessed 26 February 2008</ref> In-vision continuity links were reprised on the channel, then known as Network 2, during the evening schedule, from 1997 to 2001.<ref>[http://www.thetvroom.com/irish/rte-2-06-02.html The TV Room: Network 2 In-Vision Continuity 1997-2002]; accessed 26 February 2008</ref>

From January 2008, the daytime schedule on TV3 launched with two new in-vision continuity annnouncers, Conor Clear and Andrea Hayes.<ref>[http://www.tv3.ie/media.php?action=news&id=139 TV3 Ireland, Media Room: "TV3 follows strong 2007 with more Irish programming than ever in 2008"]; accessed 28 June 2008</ref>