The most common HD formats are either 720p (720 progressively scanned lines) or 1080i (1080 interlaced scanned lines) or some variation of these. Not a connector but part of the new digital TV standard that features increased horizontal and vertical resolution, a choice of progressive or interlaced scanning, and a widescreen aspect ratio of 16:9 (the ratio of a screen image’s width to its height) that conforms to the widescreen visual format of modern movies (older analog TVs have a squarish-looking 4:3 aspect ratio). Component-video can, with proper signal levels, give exactly the same quality as HDMI or DVI as long as the native resolution of the set is sent to it. HDMI is an evolving standard and many incompatibilities in the digital “handshake” of the HDCP protection code still exist between HDMI-connected components, especially when routed through an A/V receiver or A/V processor. No image superiority of one over the other. Copy protected with HDCP so you can’t pirate high-quality digital video, it’s compatible with DVI through DVI/HDMI adaptors. Much smaller and more convenient than DVI, HDMI is a USB-like digital video connector that carries the same digital video signals as DVI but with the added advantage of conveying a Dolby Digital surround sound bitstream.
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