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The design was inspired by a photograph of a prism with a beam of white light projected through it and emerging in the colours of the visible spectrum that Thorgerson had found in a 1963 physics textbook, as well as by an illustration by Alex Steinweiss, the inventor of album cover art, for the New York Philharmonic's 1942 performance of Ludwig ...
High-definition television ( HDTV) describes a television or video system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; [1] in more recent times, it refers to the generation following standard-definition television (SDTV).
720p (720 lines progressive) is a progressive HD signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9, normally known as widescreen HD (1.78:1). All major HD broadcasting standards (such as SMPTE 292M) include a 720p format, which has a resolution of 1280×720p. The number 720 stands for the 720 horizontal scan ...
Time base correction (TBC) is a technique to reduce or eliminate errors caused by mechanical instability present in analog recordings on mechanical media. Without time base correction, a signal from a videotape recorder (VTR) or videocassette recorder (VCR), cannot be mixed with other, more time-stable devices found in television studios and ...
Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180°. A double Porro system provides four ...
Specialty. Neurology, ophthalmology. Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
Abu Ghraib prison. The Abu Ghraib prison in the town of Abu Ghraib was one of the most notorious prisons in Iraq during the government of Saddam Hussein. The prison was used to hold approximately 50,000 men and women in poor conditions, and torture and execution were frequent. [22]
Video converters are computer programs that can change the storage format of digital video. They may recompress the video to another format in a process called transcoding, or may simply change the container format without changing the video format. The disadvantages of transcoding are that there is quality loss when transcoding between lossy ...