With HDMI, displayport come into the markets and become more and more widely used, there are so many interfaces that make us messed up. we are often asked: what’s the difference among them, and which is better, DVI, HDMI, or VGA? Now have a look at the popular connectors during our daily life and then come to the conclusion.
HDMI – short for High Definition Multimedia Interface, is a compact 19-pin digital connection that transmits both high-definition uncompressed video and multi-channel audio through a single cable. HDMI, as the preferred connection for HD devices, connects digital audio/video sources (such as set-top boxes, DVD players, HD DVD players, Blu-ray Disc players, AVCHD camcorders, personal computers (PCs), video game consoles such as the PlayStation 3 and Xbox 360, and AV receivers) to compatible digital audio devices, computer monitors, video projectors, tablet computers, and digital televisions.
DVI – Digital Visual Interface, is a video interface standard covering the transmission of video between a source device (such as a personal computer) and a display device. The DVI standard has achieved widespread acceptance in the PC industry, both in desktop PCs and monitors. Most contemporary retail desktop PCs and LCD monitors feature a DVI interface, and many other devices (such as projectors and consumer televisions) support DVI indirectly through HDMI.
VGA – Abbreviation of video graphics array, a graphics display system for PCs developed by IBM, the VGA connector or Cable carry analog video signals.
From the above definition, we know that both DVI and VGA just support video transmission while HDMI support both video and audio transmission. The difference for DVI and VGA is the former support digital video while the later just support analog video. Another important thing you should be aware is the HDCP protocol.
High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital audio and video content as it travels across connections. These connections include popular ones like DisplayPort (DP), DVI, and HDMI, as well as non-popular or now defunct connections like Gigabit Video Interface (GVIF), and Unified Display Interface (UDI).
That’s why DVI and HDMI are exactly the same as one another, image-quality-wise. Except the principal differences that HDMI carries audio as well as video, and uses a different type of connector, both HDMI and DVI use the same encoding scheme (HDCP), and that’s why a DVI source can be connected to an HDMI monitor, or vice versa, with a DVI/HDMI cable, with no intervening converter box.
So there comes to the answer, HDMI is the best solution for connecting high-definition products: the uncompressed, all-digital interface that delivers both dazzling quality and unmatched ease of use. No wonder thousands of manufacturers now incorporate HDMI connectivity into a growing list of consumer products including HDTVs, Blu-ray Disc players,multimedia PCs, gaming systems (like PS3, Xbox 360), digital cameras and camcorders,mobile devices and more.