16:9
16:9 (1.77:1) (16:9 = 42:32) is an aspect ratio with a width of 16 units and height of 9. Since 2009, it has become the most common aspect ratio for sold televisions and computer monitors and is also the international standard format of HDTV, Full HD, non-HD digital television and analog widescreen television (EDTV) PALplus.
Generally 16:9 is pronounced "Sixteen-Nine", "Sixteen-by-Nine," or "Sixteen-to-Nine."
Contents
[edit] History
When the 16:9 (1.77:1) aspect ratio was proposed by Kerns H. Powers, a member of the SMPTE Working Group On High-Definition Electronic Production, nobody was creating 16:9 videos. The popular choices in 1980 were: 1.33:1 (based on television standard's ratio at the time), 1.66:1 (the European "flat" ratio), 1.85:1 (the American "flat" ratio), 2.20:1 (the ratio of 70 mm films and Panavision) and 2.35:1 (the CinemaScope ratio for anamorphic widescreen films).
Powers cut out rectangles with equal areas, shaped to match each of the popular aspect ratios. When overlapped with their center points aligned, he found that all of those aspect ratio rectangles fit within an outer rectangle with an aspect ratio of 1.77:1 and all of them also covered a smaller common inner rectangle with the same aspect ratio 1.77:1.[1] The value found by Powers is exactly the geometric mean of the extreme aspect ratios, 4:3 (1.33:1) and 2.35:1, which is coincidentally close to 16:9 (1.77:1). Applying the same geometric mean technique to 16:9 and 4:3 yields the 14:9 aspect ratio, which is likewise used as a compromise between these ratios.[2]
While 16:9 (1.77:1) was initially selected as a compromise format, the subsequent popularity of HDTV broadcast has solidified 16:9 as perhaps the most important video aspect ratio in use.[citation needed] Most 4:3 (1.33:1) and 2.39:1 video is now recorded using a "shoot and protect" technique[3] that keeps the main action within a 16:9 (1.77:1) inner rectangle to facilitate HD broadcast.[citation needed]. Conversely it is quite common to use a technique known as center-cutting, to approach the challenge of presenting material shot (typically 16:9) to both a HD and legacy 4:3 audience simultaneously without having to compromise image size for either audience. Content creators frame critical content or graphics to fit within the 1.33 raster space.[citation needed] This has similarities to a filming technique called Open matte.
After the original 16:9 Action Plan of the early 1990s, the European Union has instituted the 16:9 Action Plan,[4] just to accelerate the development of the advanced television services in 16:9 aspect ratio, both in PAL and also in HDTV. The Community fund for the 16:9 Action Plan amounted to €228 million.
In 2008 the computer industry started to use 16:9 as standard aspect ratio for monitors and laptops. According to a report by displaysearch the reasons for this were/are:[5][6]
In 2011 Bennie Budler, product manager of IT products at Samsung South Africa, confirmed that monitors capable of 1920x1200 resolutions aren't being manufactured anymore. “It is all about reducing manufacturing costs. The new 16:9 aspect ratio panels are more cost effective to manufacture locally than the previous 16:10 panelsâ€[8]
In March 2011 the 16:9 resolution 1920x1080 became the most common used resolution among Steam's users. The earlier most common resolution was 1680x1050 (16:10).[9]
[edit] Properties
16:9 is the only widescreen aspect ratio natively supported by the DVD format. Anamorphic DVD transfers store the information as 5:4 (PAL) or 6:4 (NTSC), which is set to expand to either 16:9 or 4:3, which the television or video player handles. For instance, a PAL DVD with a full frame image may contain a video resolution of 720x576, but a video player will stretch this to 1024x576 with a 16:9 flag in order to maintain the correct aspect ratio.
DVD producers can also choose to show even wider ratios such as 1.85:1 and 2.39:1[10] within the 16:9 DVD frame by hard matting or adding black bars within the image itself. Some films which were made in a 1.85:1 aspect ratio, such as the U.S.-Italian co-production Man of La Mancha and Kenneth Branagh's Much Ado About Nothing, fit quite comfortably onto a 1.77:1 HDTV screen and have been issued anamorphically enhanced on DVD without the black bars. Many digital video cameras have the capability to record in 16:9.
Super 16 mm film is frequently used for television production due to its lower cost, lack of need for soundtrack space on the film itself, and aspect ratio similar to 16:9.[citation needed]
[edit] Common resolutions
Common resolutions for 16:9 are 640x360, 854x480, 960x540, 1024×576, 1280×720, 1366×768, 1600×900, 1920×1080, 2048x1152, 2560×1440, 3840×2160 and 4096x2304.
1080p (Full HD) is 1920×1080, while 720p (HD) is 1280×720.
[edit] In Europe
In Europe, 16:9 is being adopted as the standard broadcast format for digital and high definition TV. Some countries have even adopted the format for analog television by means of the PALplus standard.
* Do not set the aspect ratio correctly when broadcasting in 16:9 and the image appears squashed on 4:3 TV sets.
** These channels do broadcast in 16:9 and 4:3 but the aspect ratio is always kept 4:3 so 16:9 programs appear squashed.
* These stations do not set the aspect ratio correctly when broadcasting in 16:9 and the image appears stretched on 4:3 TV sets. Such stations use mostly 4:3 programming.
Older programmes filmed in 4:3 are:
* cropped.
** transmitted in their original format.
And almost all pay channel via TNT, ADSL, DVB-C and DVB-S;
Canal+ Décalé, Canal+ Family, Poker Channel, CinePlay, Ciné Cinéma Premier, OL TV, Motors TV, Disney Cinemagic, Disney Cinemagic + 1, NRJ Hits, Ciné Cinéma Premier HD and SD, National Geographic HD and SD, Ushuaia TV HD and SD, Disney Cinemagic HD and SD, MTV HD, NRJ 12 HD and SD, iConcert HD, HD1, Melody Zen HD, Sci Fi Channel HD and SD, 13ème Rue HD and SD, Orange cinemax HD...
Occasional in 16:9 aspect ratio: ET1, NET, ET3, Mega Channel, Alpha TV, ANT1
* Do not set the aspect ratio correctly when broadcasting in 16:9 and the image appears stretched on 4:3 TV sets. Such stations use mostly 4:3 programming.
Most of the actual broadcast of RAI public service and of few major local television stations and almost all of the broadcast of Mediaset and La7 networks (except some rerun, a handful of minor programs and the soap opera The Bold and the Beautiful on Canale 5) is shown in the 16:9 ratio. Many television networks do not set correctly the aspect ratio when broadcasting.
Older programmes filmed in 4:3 are transmitted in their original format or zooming to 14:9 Pillarbox, stretched programs are not common.
Advertisements filmed in 4:3 often are zoomed to 16:9, only some of them are transmitted with 4:3 Pillarbox. Never stretching.
Often on 16:9: La 1, La 2, Disney Channel Spain, La 10, La Siete, FDF, laSexta 2, laSexta 3 and practically all of the regional tv channels like Cyl TV, CMT or TVG.
Sometimes on 16:9: Canal 24 Horas, Clan, Intereconomia (stretches most of its programming to 16:9) and practically all of the local tv channels.
Always on 4:3: Practically all PPV Channels like The History Channel, Cartoon Network, Canal de las Estrellas or CNN+. Shop channels.
In 1998, with the introduction of digital television, digital versions of BBC One, BBC Two, ITV 1 and Channel 4 were created. An On Digital set top box or a subscription to Sky Digital was required to view the digital versions.
In 2001, the UK's fourth broadcaster Channel 5 switched to 16:9.
In 2002, On Digital became defunct and free-to-air digital television services began to operate under the name of Freeview.
In 2003, Sky branded channels were re-branded which included the switch to 16:9.
In 2006, BBC HD began broadcasting in 1080i which became the standard for all HD channels. Similar to the switch to Digital in 1998, viewers required an additional set-top-box which was HD capable, one that could be provided from either Sky or Virgin Media.
In 2007, Channel 4 HD was launched on Sky. It was later added to Virgin Media in 2009 and then to Freeview HD in 2011.
In 2008, ITV 1 HD was launched on Sky and was later added to Virgin Media and Freeview HD in 2010.
In 2009, Freeview HD launched allowing viewers to watch BBC HD and ITV 1 HD without a subscription to either Sky or Virgin Media, a Freeview HD set-top box was required.
In 2010, Channel 5 HD and BBC One HD were launched on Sky and Virgin Media. BBC One HD was later added to Freeview HD in 2011.
As of 2012;
All Freeview channels broadcast in 16:9
Almost all cable/satellite channels broadcast in 16:9 with the rest expected to switch by the end of 2012.
[edit] In Oceania
[edit] In Asia
Japan's Hi-Vision originally started with a 5:3 ratio but converted when the international standards group introduced a wider ratio of 51â„3 to 3 (=16:9).
[edit] In America
[edit] See also
[edit] References
- Cited references
- General references


