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Diamond Multimedia is an American company that specializes in many forms of multimedia technology. They have produced graphics cards, motherboards, modems, sound cards and MP3 players; however, the company began with the production of the TrackStar, an add-on card for IBM PC compatibles which emulates Apple II computers.
The NTSC color system changed from the black-and-white 60-fields-per-second standard to 59.94 fields per second to make the color circuitry simpler; the 1950s TV sets had matured enough that the power frequency/field rate mismatch was no longer important. Modern TV sets can display multiple field rates (50, 59.94, or 60, in either interlaced or ...
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When color TVs began providing video inputs and other features, XL-100 models in the late 1980s often had only a standard 75 ohm unbalanced dipole coaxial cable input. Higher-end XL-100 models in the 1980s had a digital keypad and a digital channel indicator, but did not have remote capabilities, [ 3 ] while the lower XL-100 sets had basic ...
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On September 4, 1940, while working at the lab, he demonstrated the Field-Sequential Color TV system. [1] It utilized a mechanical color wheel on both the camera and on the television home receiver, but was not compatible with the existing post-war NTSC, 525-line, 60-field/second black and white TV sets as it was a 405-line, 144-field scanning ...
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Thus, the new color television standard reduced the line rate by a factor of 1.001 to 1/286 of the 4.5 MHz audio subcarrier frequency, or about 15734.2657 Hz. This reduced the frame rate to 30/1.001 ≈ 29.9700 Hz, and placed the color subcarrier at 227.5/286 = 455/572 = 35/44 of the 4.5 MHz audio subcarrier.