Letterbox mattes are not necessarily black. Usually, such matting of 1.85:1 film is eliminated to match the 1.78:1 aspect ratio in the image transference. Because the 1.85:1 aspect ratio does not match the 1.78:1 aspect ratio of widescreen video, slight letter-boxing occurs. On a widescreen television set, a 1.78:1 image fills the screen however, 21:9 aspect ratio films are letter-boxed with narrow mattes. In addition to films produced for the cinema, some television programming is produced in high definition and therefore widescreen. Ĭurrent high-definition television systems use video displays with a wider aspect ratio than older television sets, making it easier to accurately display widescreen films. In addition, recent years have seen an increase of "fake" 2.40:1 letterbox mattes on television to give the impression of a cinema film, often seen in adverts, trailers or tv such as Top Gear. When using a 1.33:1 screen, it is possible to display such programming in either a letter-boxing format or in a 1.33:1 center-cut format (where the edges of the picture are lost).Ī letter-boxed 1.56:1 compromise ratio was often broadcast in analogue transmissions in European countries making the transition from 1.33:1 to 1.78:1. Most television channels in Europe are broadcasting standard-definition programming in 1.78:1, while in the USA, these are down-scaled to letterbox. On television ĭigital broadcasting allows 1.78:1 widescreen format transmissions without losing resolution, and thus widescreen is the television norm. The image is produced by using a map projection-like technique to approximate how the picture might look if projected onto a curved Cinerama screen. The term "SmileBox" is a registered trademark used to describe a type of letter-boxing for Cinerama films, such as on the Blu-ray release of How the West Was Won. Each disc contains a label noting the use of "RCA's innovative wide-screen mastering technique." In cinema and home video The first fully letter-boxed CED release was Amarcord in the past century, and several others followed including The Long Goodbye, Monty Python and the Holy Grail and The King of Hearts. ![]() Initially, letter-boxing was limited to several key sequences of a film such as opening and closing credits, but was later used for entire films. The first use of letter-boxing in consumer video appeared with the RCA Capacitance Electronic Disc (CED) videodisc format. The term refers to the shape of a letter-box, a slot in a wall or door through which mail is delivered, being rectangular and wider than it is high. The resulting video-graphic image has mattes empty space above and below it these mattes are part of each frame of the video signal. Letter-boxing is the practice of transferring film shot in a widescreen aspect ratio to standard-width video formats while preserving the film's original aspect ratio.
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