DVI TO HDMI: Tech Spech of DVI
Among DVI to HDMI, DVI cable is capable of accommodating up to 2 transition minimized differential signaling ( TMDS ) links, the Extended Display Identification Data (EDID) services the VESA Display Data Channel (DDC), and also the blue, green and the red vertical and horizontal sync lines that belongs to an RGBHV video signal which is analog and is backward compatible with analog VESA video. In the DVI to Hdmi, when dvi is using TMDS, that can only mean that it is totally capable with both the DFP and the P&D standard is also compatible with HDMI.
DVI: Length and Bit Rate
Every link that is contained in the dvi is made up of 3 channels which carry data (RGB info) and is having a maximum of 165 Mhz Bandwidth, which in other words is equivalent to 165 million pixels per second. ; this equates to 165 million pixels per second, considering that its 8 bit per color, and 24 bit depth. The DC balancer minimizes the every incoming 8 bit color data word, and is transitioned into 10 bit word. And that means that every pixel is denoted by a sum of 30 bits. That means, among the dvi to hdmi, the dvi single cable is able to put up a throughput of 4.9 Gbps and when the case is of dual link dvi, then it is a maximum of 9.9 gbps.
The main thing about the DVI cable is the problem with the length. The DVI cable are usually very short, and the problem arises when you decide to do a dvi to hdmi transition or use it for your home theater system and want to connect the cable to a wall mounted projector or a far off tv.
If not DVI then what?
Usually people use twisted cable instead of coaxial, for video connection, but the same might degrade over the long distance and might introduce noise in the video and audio. Consider the dvi to hdmi thing for instance, your dvi cable is given a standard maximum length of 5 meters only. Now how long your cable is depends on what kind of bit rate you are expecting out of your dvi cable. The higher the bit rate, the shorter your cable has to be. There are manufacturers who claim up to 50 meter of dvi cable, but god knows at what bit rate!
Little more about DVI
As the dvi cable has a maximum bandwidth of 165 mhz, on a single link, it is capable of carrying 1080p HDTV signal at 60hz, within a single interface. Now the same is double in the dual link dvi. But you'd have to use a twisted dvi cable for the same purpose, and you would also be in need of additional pins to connect the additional dvi cable, as a second link. Before you jump over to dvi, better do a background check on the availability of the support for this cable in the present market and availability of support for the same upon the various devices.
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