What are aspect ratios?
Video can be stored on a DVD in 4:3 format (standard TV shape) or 16:9 (widescreen). The 16:9 format is “anamorphic,” meaning the picture is squeezed horizontally to fit a 4:3 rectangle then unsqueezed during playback. DVD players output widescreen video in three different ways: – letterbox (for 4:3 screens) – pan & scan (for 4:3 screens) – anamorphic or unchanged (for wide screens) Note: Some 16:9 discs are playable in widescreen and letterbox modes only, if the producer chooses. For letterbox mode the player uses a “letterbox filter” that creates black bars at the top and the bottom of the picture (60 lines each for NTSC, 72 for PAL). This leaves 3/4 of the height remaining, creating a shorter but wider rectangle. In order to fit this shorter rectangle, the picture is squeezed vertically by combining every 4 lines into 3. This compensates for the original horizontal squeezing, resulting in the movie being shown in its full width. For pan & scan mode the video is unsqueezed to 16:9 an
The aspect ratio of a television display or television picture describes the ratio of the picture width to height. Current NTSC pictures are 4 units wide by 3 units tall, nearly square. This came about because that ratio, 4X3 or 1.33:1, was the ratio used for early motion pictures. also called the “Academy Ratio” for the Motion Picture Academy that established it, it was chosen so movies could be shown on television without having to change their basic composition and shape As television gained in popularity, people found less of a reason to go to the movie theater. In response to this decline in business, moviemakers created new aspect ratio standards to create ever-larger images that use more of the viewer’s peripheral vision. This immersed the viewers into a “virtual reality” experience long before that term was even coined. HDTV, being a system designed for the home viewing of movies and other programming, will use a wide-screen aspect ratio that is similar to, but still a little n
The aspect ratio of an image is its displayed width divided by its displayed height. The most common aspect ratios you’re likely to come across are 4:3 (1.33:1) which is universal for standard-definition video formats, and 16:9 (1.78:1) – universal to high-definition television and European digital television. There are also other cinema and video aspect ratios that are used.
The aspect ratio of a television picture describes the ratio of the pictures width to height. Current Standard TV (NTSC) pictures are 4 units wide by 3 units tall, nearly square. The 4X3 ratio was originally used for early motion pictures. It is also called the “Academy Ratio”. Today aspect ratios are part of the cinematography of the film. Movies are intended to subtend a large angle of view in order to put the viewer into the action. The aspect ratio helps to create this effect. HDTV is presented in a 16X9 format. This is a wide-screen aspect ratio that is similar to the ratio of major movies. The wide aspect ratio of HDTV will allow the vision of the movie artists to be delivered to your home with less compromise and greater impact. • What is the difference between NTSC, 1080i, 720p and native? NTSC Standard TV (NTSC) systems shows us 30 picture frames-per-second (fps) using two fields. Each field consists of half the scanning lines of the frame. In the first 1/60 of a second, the t
