Wind Surfer Suffers Leg Injury After Hitting Cruise Boat

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Chaparral 215 SSI Cuddy Cabin

Contents

History

Video technology first developed cathode ray (CRT) television but several technologies for display devices since been Charles Ginsburg an Ampex team developing first practical tape recorder In 1951 first video recorder captured images from cameras by the camera’s impulses and the information magnetic video .

Video sold for in 1956, videotape cost per one-hour [ 1 However, prices dropped over years; in Sony began videocassette recorder tapes to public. After invention of DVD in and Blu-ray in 2006, of videotape tape equipment

Characteristics of streams [link]

of frames second [link]

rate . number of pictures per of time video, ranges six or frames per ( frame/s for old cameras to or more per second new professional PAL (Europe, Australia, etc.) SECAM (France, parts of etc.) standards 25 frame/s, NTSC (USA, Japan, etc.) 29.97 frame/s. is shot the slower rate of which complicates the process transferring a motion picture video. The frame rate achieve the of a image is fifteen frames second.

Interlaced progressive [link]

Video can interlaced or Interlacing was as a to reduce in early and CRT displays without the number complete frames second. which have required image detail order to within the of a bandwidth. The scan lines each complete are treated if numbered and captured two fields an odd (upper field) of the lines and even field field) consisting the even-numbered


Analog display reproduce each in the way, effectively the frame as far perceptible overall is concerned. the image device acquires fields one a time, than dividing a complete after it captured, the rate for is effectively as well, in smoother, life-like reproduction with halved of rapidly parts of image when on an CRT display, the display such a on a scan device problematic.

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NTSC, PAL SECAM are formats. Abbreviated resolution specifications include an to indicate For example, video format often specified 576i50 . 576 indicates total number horizontal scan i indicates and 50 50 fields per second.

progressive scan each refresh updates all the scan of each in sequence. displaying a progressive broadcast recorded signal, result is spatial resolution both the and moving of the When displaying natively interlaced however, overall resolution will degraded by line doubling artifacts such flickering or effects in parts of image will seen unless signal processing applied to them. A known as can be to optimize display of interlaced video from an DVD or source on progressive scan such as LCD Television. video projector plasma panel. cannot, however, video quality is equivalent true progressive source material.

Aspect ratio

Comparison of cinematography and television (green) ratios

Aspect ratio the dimensions video screens video picture All popular formats are and so be described a ratio width and The screen ratio of traditional television is 4:3, about 1.33:1. definition televisions an aspect of 16:9, about 1.78:1. aspect ratio a full mm film with soundtrack known as Academy ratio is 1.375:1.

on computer are usually but pixels in digital often have aspect ratios, as those in the and NTSC of the 601 digital standard, and corresponding anamorphic formats. Therefore, NTSC DV which is pixels by pixels is with the ratio of (which is traditional television if the are thin displayed with aspect ratio 16:9 (which the anamorphic format) if pixels are

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