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2. Standard-definition television - Wikipedia

   en.wikipedia.org/wiki/Standard-definition_television

   In other parts of the world that used the PAL or SECAM color systems, digital standard-definition television is now usually shown with a 16:9 aspect ratio, with the transition occurring between the mid-1990s and late-2000s depending on the region. Older programs with a 4:3 aspect ratio are broadcast with a flag that

3. Widescreen display modes - Wikipedia

   en.wikipedia.org/wiki/Widescreen_display_modes

   Normal mode frames the 4:3 video to the 16:9 picture area by displaying it in its original aspect ratio, with vertical gray or black bars on both sides of the screen. The disadvantage of this method is the fact that the image is small by virtue of not using the entire width of the screen. This is also known as the 4:3 mode.

4. Display aspect ratio - Wikipedia

   en.wikipedia.org/wiki/Display_aspect_ratio

   This aspect ratio was chosen as the geometric mean between 4:3 and 2.35:1, an average of the various aspect ratios used in film. [3] While 16:9 is well-suited for modern HDTV broadcasts, older 4:3 video has to be either padded with bars on the left and right side (pillarboxed), cropped or stretched, while movies shot with wider aspect ratios ...

5. Fullscreen (aspect ratio) - Wikipedia

   en.wikipedia.org/wiki/Fullscreen_(aspect_ratio)

   Fullscreen (aspect ratio) The aspect ratio of 4:3. Fullscreen (or full screen) refers to the 4:3 (1. 3:1) aspect ratio of early standard television screens and computer monitors. [1] Widescreen ratios started to become more popular in the 1990s and 2000s. Film originally created in the 4:3 aspect ratio does not need to be altered for full ...

6. Test card - Wikipedia

   en.wikipedia.org/wiki/Test_card

   Test card. SMPTE color bars: common NTSC test pattern. PM5544: common PAL test pattern. EBU colour bars (4:3) A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off). [1]

7. Active Format Description - Wikipedia

   en.wikipedia.org/wiki/Active_Format_Description

   In television technology, Active Format Description ( AFD) is a standard set of codes that can be sent in the MPEG video stream or in the baseband SDI video signal that carries information about their aspect ratio and other active picture characteristics. [1] It has been used by television broadcasters to enable both 4:3 and 16:9 television ...

8. Ultrawide formats - Wikipedia

   en.wikipedia.org/wiki/Ultrawide_formats

   The 64:27 aspect ratio is the logical extension of the existing video aspect ratios 4:3 and 16:9. It is the third power of 4:3, whereas 16:9 of widescreen HDTV is 4:3 squared. This allows electronic scalers and optical anamorphic lenses to use an easily implementable 4:3 (1.3 3 ) scaling factor.

9. Widescreen - Wikipedia

   en.wikipedia.org/wiki/Widescreen

   In film, a widescreen film is any film image with a width-to-height aspect ratio greater than 4:3 (1.33:1). For TV, the original screen ratio for broadcasts was in 4:3 (1.33:1). Largely between the 1990s and early 2000s, at varying paces in different countries, 16:9 (e.g. 1920x1080p 60p) widescreen displays came into increasingly common use by ...