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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. The resulting video-graphic image has mattes of empty space above and below it; these mattes are part of each frame of the video signal.
A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming mail at a private residence or business. For outgoing mail, post boxes are often used for depositing the mail for collection, although some letter boxes are also capable of holding outgoing mail for a carrier to pick up.
There are about ten survivors of the later No.1 Large size and several hundred of the No.2 size in the UK. A Victorian Wall box (unidentified type) near Ashprington, Devon, UK. By moving the Collection plate from the top front of the box casting to a slot in the door, it was made much easier to change, having previously been bolted to the box ...
Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .
[1] [2] [3] Sometimes, by accident or design, a standard ratio image is presented in the central portion of a letterbox picture (or vice versa), resulting in a black border all around. It is generally disliked because it wastes much screen space and reduces the resolution of the original image.
Designated Type N, or "The Bantam" box, the ultra-modern design is made in traditional cast iron, with polished steel fittings. These are more truly "pedestal boxes" such as Type L and Type M, but due to their size, are considered by the Letter Box Study Group to be Lamp Letter boxes. LB224 Type N Bantam box, Machan Engineering Scotland
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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 ...