independent RGB trimmer to adjust for CGA/EGA and VGA intensity ĬEV2TV can help you to resolve a lot of problems.switching power supply with 3 linear voltage regulator to minimize voltage ripple.dedicated digital to analog (DAC) converter.S-Video (separate video) through the 4-pin mini-DIN connector.composite video through yellow RCA connector.RGBS (Red, Green, Blue, Composite Sync) + audio stereo through SCART connector.CEV2TV converts the digital signals to analog with a dedicated Digital to Analog Converter (DAC) that can perfectly produce the entire palette of CGA and EGA: the brow is brown and the dark grey is dark grey.īecause CGA and EGA use digital signal for RGBI/RrGgBb signals and for synchronization signals, CEV2TV has got a FPGA and a dedicated R-2R ladder DAC.ĬEV2TV produces three types of video output: Only few very expensive video converters are able to display correctly the brown and the dark grey. Compatible monitors displayed the brown as dark yellow and the dark grey as black. It was adopted because it guaranteed the generation of two important colors: the brown and the dark grey. Clearly, this strange conversion was not a contort idea of IBM engineers. Official monitors, like the IBM 5153, convert the digital information, coming from CGA/EGA card adapter, to analog in a strange way. The 4-bit of CGA allow a 16 colors palette while the 6-bit of EGA allow a 64 colors palette. In particular, CGA could be connected to dedicated monitor using a 4-bit digital (TTL) “RGBI” interface while EGA could be connected to dedicated monitor using a 6-bit digital (TTL) “RgGgBb” interface. horizontal scanning frequency is between 14.8 kHz and 16.2 kHz.ĬGA and EGA use digital signals to drive the monitors.
If the video input changes at an incompatible scan frequency, CEV2TV disables the output instantly.ĬEV2TV enables the video output when the input:
#Digital video to vga converter tv
There are not Analog to Digital Converters (ADC), that ensure maximum video quality and native resolution of video.Īs CEV2TV doesn’t touch the horizontal and the vertical scanning frequency of original video input, it continuously monitors the input signals and the output is enabled only when a compatible signal for TV is available. In CEV2TV the entire process occurs in analog domain. Scan converters and also video scalers alter video frequency and resolution reducing video quality. Unlike the majority of converters on the market, CEV2TV does not alter the original video signals and it does not change the scan frequency signals using scan converters or video scalers. the Video Graphics Array (VGA) when used at 15kHz.the Enhanced Graphics Adapter (EGA) when used at 200-line mode.Thus, we created the first prototype of CEV2TV.Īfter months of work to increase the video quality we created the second prototype of CEV2TV but it still wasn’t fully compatible with CGA/EGA palette.Īt the end we created the ultimate version of CEV2TV with DAC and FPGA, finally fully compatible with CGA/EGA palette.ĬEV2TV is able to display on standard television set: After few weeks of research we understood that no standard and low priced CRT monitor was compatible with the industrial machine. We hoped to find a new CRT monitor with the same characteristics of the exhausted one at a low price.
#Digital video to vga converter how to
Some video converters have some features of CEV2TV, other video conveters have other ones, but any of them has every feature of CEV2TV at the price of CEV2TV.”ĬEV2TV was born about 2 years ago from a very simple and little circuit which was able to separate horizontal and vertical scanning signals from a composite scanning signal.Īfter few days we had to face an issue: how to replace exhausted CRT monitor of an industrial knitwear machine. The answer is simple: “ Because none of the video converters on the market has the features of CEV2TV at the price of CEV2TV. “ Why another video converter? There are already several video converters on the market.” With CEV2TV you can use your standard television set (CRT, LCD, OLED, Plasma, etc.) as a monitor to display CGA, EGA and VGA video formats.ĬEV2TV does not alter both the original video resolution and the scan frequency achieving high quality video output.
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