Difference Between RGB and VGA
As with many other electronics-related topics, video display technology is rife with complicated acronyms that can confuse a standard user. The difference between VGA and RGB is one such topic.
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RGB
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RGB stands for “red, green, blue” and refers to a video signal that transfers each of the three standard colors separately. By contrast, a composite video signal mixes the three colors together. Non-LCD computer monitors use RGB signals.
VGA
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Video Graphics Array is a PC display system originally developed by IBM that replaced earlier graphics standards. Because VGA uses an analog signal while the older systems used a digital signal, a monitor designed for one of these older standards cannot use VGA.
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Analog Signal
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A VGA analog signal is capable of transmitting any value within a certain range. By contrast, an RGB digital signal is limited to specific values within that range. For example, a digital signal may be able to represent any integer from one to ten, while an analog signal could also represent any fractional value between those integers.
Newer Standards
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Many other video signal standards have been developed based on VGA. Some of these include SVGA and XGA.
Analog to Digital Conversion
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Digital Visual Interface is a digital interface standard designed to convert an analog signal into a digital signal and is often used when connecting a computer to a digital display device.
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References
- Photo Credit vga image by MATTHIEU FABISIAK from Fotolia.com
