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  2. Pan and scan - Wikipedia

    en.wikipedia.org/wiki/Pan_and_scan

    A 2.35:1 film still panned and scanned to smaller sizes. At the smallest, 1.33:1 (4:3), nearly half of the original image has been cropped. Pan and scan is a film editing methodology of adjusting widescreen film images, rendering them compatible for broadcast on 4:3 aspect ratio television screens.

  3. Progressive scan - Wikipedia

    en.wikipedia.org/wiki/Progressive_scan

    Progressive scan is used for scanning and storing film-based material on DVDs, for example, as 480p24 or 576p25 formats. Progressive scan was included in the Grand Alliance's technical standard for HDTV in the early 1990s. It was agreed that all film transmission by HDTV would be broadcast with progressive scan in the United States. [4]

  4. Scan line - Wikipedia

    en.wikipedia.org/wiki/Scan_line

    Scan lines are important in representations of image data, because many image file formats have special rules for data at the end of a scan line. For example, there may be a rule that each scan line starts on a particular boundary (such as a byte or word; see for example BMP file format). This means that even otherwise compatible raster data ...

  5. YouTube TV - Wikipedia

    en.wikipedia.org/wiki/YouTube_TV

    YouTube TV is an American subscription over-the-top streaming television service operated by YouTube, a subsidiary of Google, which in turn is a subsidiary of Alphabet Inc., who announced YouTube TV on February 28, 2017. [2]

  6. Blanking (video) - Wikipedia

    en.wikipedia.org/wiki/Blanking_(video)

    In analog video, blanking occurs between horizontal lines and between frames. In raster scan equipment, an image is built up by scanning an electron beam from left to right across a screen to produce a visible trace of one scan line, reducing the brightness of the beam to zero (horizontal blanking), moving it back as fast as possible to the left of the screen at a slightly lower position (the ...

  7. Image scanner - Wikipedia

    en.wikipedia.org/wiki/Image_scanner

    Alexander Murray and Richard Morse invented and patented the first analog color scanner at Eastman Kodak in 1937. Intended for color separation at printing presses, their machine was an analog drum scanner that imaged a color transparency mounted in the drum, with a light source placed underneath the film, and three photocells with red, green, and blue color filters reading each spot on the ...

  8. Laser scanning - Wikipedia

    en.wikipedia.org/wiki/Laser_scanning

    Laser scanning is the controlled deflection of laser beams, visible or invisible. [1] Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

  9. Overscan - Wikipedia

    en.wikipedia.org/wiki/Overscan

    Overscan is a behaviour in certain television sets in which part of the input picture is cut off by the visible bounds of the screen. It exists because cathode-ray tube (CRT) television sets from the 1930s to the early 2000s were highly variable in how the video image was positioned within the borders of the screen.

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