Das Konzept und der Unterschied von VGA- und HDMI-Anschlüssen an Mini-PCs

Mini-PCs sind in der Regel mit mehreren Videoübertragungsschnittstellen wie VGA ausgestattet, HDMI, DP, etc. Jede Schnittstelle variiert in Form und Funktion. Beim Kauf eines Mini-PCs, Der Benutzer wählt Modelle aus, die mit unterschiedlichen Schnittstellen ausgestattet sind, basierend auf seinen tatsächlichen Anforderungen. Zurzeit, Die gebräuchlichsten Videoschnittstellen auf Mini-PCs sind VGA und HDMI. OAI will give you a brief introduction to the concept and differences between these two interfaces.

1. Interface Definition
VGA (Video Graphics Array): VGA is the computer display standard for analog signals. The VGA interface is an interface that adopts the VGA video transmission standard.

HDMI (High Definition Multimedia Interface): HDMI is a digital video/audio interface technology that can transmit both audio and image signals simultaneously.

2. Differences
In terms of interface appearance, the VGA interface is a 15-pin trapezoidal port, divided into three rows, with five holes in each row. The HDMI interface can be divided into three types based on size specifications: standard, mini, and micro.

In terms of transmission signals, the VGA interface transmits analog signals, which undergo one digital/analog conversion and one analog/digital conversion and can only transmit video signals. A separate audio cable is required to transmit audio signals. The HDMI interface is a digital signal, which can transmit high-definition video, support 4K resolution and digital audio, and the sound and picture can be output in high definition at the same time.

In terms of anti-interference, the anti-interference performance of the VGA interface is not as good as that of the HDMI interface. Under long-distance and high-frequency resolution connections, the effect of using the HDMI interface is much better than that of VGA.

With the characteristics of simultaneous transmission of audio and video signals and higher resolution, the HDMI interface is recognized by more and more mini PC manufacturers. Im Gegensatz dazu, although the VGA interface is older, there are still many monitors, projectors, and other devices equipped with VGA interfaces that are still in use. Deshalb, OAI mini PCs of different models will be equipped with different video interfaces to better meet customers' different connection needs. For details, please refer to the OAI product specification or consult the OAI sales team.