The difference between VGA and HDMI

The main differences between VGA and HDMI lie in five aspects: signal type, resolution and refresh rate, audio transmission, interface form and compatibility, and function expansion.

Signal type: VGA transmits analog signals, which are susceptible to electromagnetic interference and may result in a decline in picture quality and problems such as blurring and color distortion when transmitting over long distances; HDMI transmits digital signals, which have strong anti-interference capabilities, stable signals, and longer transmission distances (up to 15 meters).
Resolution and refresh rate: VGA can support a maximum resolution of 1920×1200 and a refresh rate of typically 60Hz, which cannot meet the requirements for 4K and high refresh rates; HDMI supports 4K, 8K resolutions (such as HDMI 2.1 supporting 8K 120Hz), high refresh rates (144Hz+), and is suitable for gaming and video editing.
Audio transmission: VGA can only transmit video signals and requires an additional audio cable to connect audio equipment; HDMI can simultaneously transmit video and audio signals and also supports multi-channel, Dolby Atmos, etc., simplifying the wiring.
Interface form and compatibility: VGA is a 15-pin trapezoidal blue interface that needs to be fixed with screws and is commonly found in old devices such as CRT monitors and old computers; HDMI is a flat small interface that supports hot plugging and has types such as standard, mini, micro, etc., widely used in modern devices such as televisions, graphics cards, game consoles, etc., with stronger compatibility.
Function expansion: VGA has no expansion function and can only perform basic video transmission; HDMI supports features such as HDR, 3D, CEC (device linkage control), etc., which can enhance the audio-visual experience.
Overall, HDMI is superior to VGA in terms of picture quality, refresh rate, audio integration, and function expansion, and is the preferred choice for modern devices; VGA is only suitable for compatibility scenarios with old devices.