PC monitors and many other electronic video devices can operate in modes such as VGA and SVGA. What are their features?
Facts o VGA
VGA is a digital picture reproduction standard supported by computer monitors and graphics adapters. In this case, the display and the video card interact within the VGA mode in an inseparable combination: if the graphics adapter transmits a signal in the VGA standard to the monitor, then it must reproduce the picture that fully corresponds to the specified parameters.
In this case, the data transmission from the graphics adapter to the display is carried out via an analog channel. The most commonly used VGA connector with 15 metal pins is DE-15.
The VGA standard is a complex technology represented by the collection of several hardware components. The main one is the graphics controller of the video card. Such a device is responsible for ensuring the exchange of digital data between the PC processor and video memory. In turn, the corresponding RAM modules temporarily store data, which, by means of an analog conversion, is displayed on a computer monitor. Another important hardware component involved in the VGA standard is the synchronizer. It helps to improve the stability of the reproduction of color layers.
A video adapter that supports VGA can display up to 256 different colors. This figure could be considered relatively decent for a PC in the 80s - when the VGA standard was actually developed. However, for the rapidly growing market of the computer industry in the 90s, it was obviously more than modest. That is why engineers of the world's leading brands have developed an improved standard for digital picture reproduction - SVGA.
The SVGA standard, or Super VGA, is the result of further improvements in the hardware components that form VGA technology. Basically, it is also a set of hardware solutions similar in functions to those implemented in VGA, but much more efficient.
Due to the higher technological efficiency, video adapters and monitors capable of operating in SVGA mode can display a huge number of colors - up to 16 million. This allows you to reproduce on a computer display almost any image in full color mode, make realistic games, edit photos and videos.
It should be noted that the SVGA signal from the video adapter to the monitor can be transmitted using the same 15-pin connector as with VGA technology.
The main difference between VGA and SVGA is in the number of colors supported by the standards. The VGA format can display up to 256 colors on the screen, SVGA up to 16 million. This difference is, of course, predetermined by the level of technology implemented in these standards. Obviously, SVGA is also incomparably more technologically advanced. At the same time, however, a signal in the SVGA standard, as we noted above, can be transmitted through the same hardware interfaces as VGA. Thus, a certain resource was initially laid in them to ensure an increase in PC performance in terms of forming a digital image.
Having learned what is the difference between VGA and SVGA, we will display the corresponding criteria in a small table.
|What do they have in common?|
|The image is displayed analogously via a 15-pin DE-15 connector|
|What is the difference between them?|
|Allows you to display up to 256 colors on the screen||Allows you to display up to 16 million colors|