Sunday, May 2, 2010

DVI to HDMI - HDMI Basics Part 2

In the last post we discussed the benefits of HDMI and other basic information. Now we'd discuss some more details regarding the benefits of HDMI.

HDMI is mainly meant for transferring digital information like audio and video in an uncompressed format, and there would be no degradation of quality while that happens.

One important thing to note though is, that it is totally compatible in a backward way with dvi. So you would just require a dvi cable to connect and a dvi to hdmi adapter in between. This enables the device manufacturers to put in extra detail in the output given by the devices.

Previously in the earlier display devices, there used to be one way communication channel between the video source and the display device. But then with the advent of HDMI, there has been set up a two way communication channel between the two, and the the source of the video can now contact the display device, and then device can talk back to the source and try adjusting itself automatically based on the content being served by the source. This enables the device to identify whether a source is sending information at a 4:3 ratio or 16:9 ratio and then adjust itself to broadcast that resolution.

HDMI also keeps in mind the distances usually used for cables, and thus it can easily accommodated copper cables of length up to fifteen meters. And best part is, it doesn't even require amplifiers to amplify the signal. This is a lot better when compared to the dvi amplifier which need to be repeated every 5 meters.


Another great advantage of the HDMI cables is the fact that it is very easy to manufacture the HDMI cables. At higher resolutions you can easily make out the quality difference between a normal S-video and a HDMI brought in video. Even when you look at the corners of the text, it is very noticeable.

Very important advantage is the fact that, HDMI is a single cable, and thus reduces the hassle of connecting multiple cables at multiple spots. This also reduces the mess that is usually created behind the tv. This cable can be effectively used in dvi to hdmi connection.

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