What is HDMI?

If you've heard about HDMI, but you are not exactly sure what it means, or if you're confused about the terms used, then read below for basic information on the HDMI format.

HDMI stands for High Definition Multimedia Interface, and it provides a more effective means of connecting audio visual equipment than older standards such as SCART and S-Video. It is a pure digital format which doesn't use compression, thereby ensuring high quality. Both audio (up to 8 channels) and high definition video information is transmitted down the same cable.

What devices can be connected using HDMI?

Modern TVs have multiple HDMI inputs which allow you to connect your DVD player, set-top/cable box, A/V receiver, Blu-ray player, HD satellite and other devices. Mini-HDMI sockets are also now appearing on a wide variety of other devices, such as digital cameras, camcorders and high-end graphics cards.

HDMI and High-Definition Video

HDMI fully supports the current top high-definition video format called 1080p. This gives a resolution of 1920 x 1080 pixels with progressive scan. This is distinct from the 1080i (interlaced) format, in which essentially half the lines on the screen are drawn, then the other half. With progressive scan technology each line is displayed at the same time, resulting in a smoother picture. The newest HDMI specification, version 1.4, actually provides enough bandwidth to support resolutions of up to 4000 x 2000 pixels, and also 3D.