VGA (Video Graphics Array) transmits analog video signals from a source to a display. It is an older standard, but it is still commonly used on older computers and projectors. VGA supports lower resolutions and color depths than HDMI.
RGB (Red Green Blue) is a color model that uses three primary colors (red, green, and blue) to create all other colors. In the context of digital input, RGB refers to the separate transmission of red, green, and blue signals from a source to a display. RGB can be transmitted over HDMI, VGA, or other types of cables.
Here is a table that summarizes the key differences between HDMI, VGA, and RGB digital input types:
| Feature | HDMI | VGA | RGB |
|---|---|---|---|
| Type | Digital | Analog | Digital |
| Resolution | Up to 8K (7680x4320) | Up to 1920x1080 | Up to 1920x1080 |
| Color depth | Up to 16 bits per channel (48 bits total) | Up to 8 bits per channel (24 bits total) | Up to 8 bits per channel (24 bits total) |
| Refresh rate | Up to 240 Hz | Up to 60 Hz | Up to 60 Hz |
| Connectors | HDMI port | VGA port | RGB port (may be a D-sub connector or a component video connector) |
| Common uses | Modern TVs, monitors, Blu-ray players, game consoles | Older computers, projectors | Some older TVs, monitors, and projectors |
Overall, HDMI is the best choice for digital input because it supports the highest resolutions, color depths, and refresh rates. VGA and RGB are older standards that are still used in some cases, but they are not as versatile or capable as HDMI.