High Definition Explained

By | February 4th, 2009

High Definition Television or HDTV is a common word these days. There are many display devices, small and large which are ‘capable’ of running High Definition content, and thus are called HDTV. We also see video content categorized as ‘HD’. But what does this really mean?

hdtv High Definition Explained

High Definition is nothing more than a Higher Resolution Video. Resolution means the amount of information (pixels) a picture has. Thus, the higher the resolution, the higher the quality. That is why, High Definition videos have better image quality than traditional videos.

However, higher resolution also means increased size. A conventional DVD has 4.7 GB of space, which is not enough for storing High Definition content. That is why, High Definition was not an option in the past. But now, with Blue-Ray drives, it is possible to store HD content, with upto 54 GB Capacity.

blue ray disc High Definition Explained

blu ray 4 High Definition Explained

To take advantage of the HD content, one needs to have a HD decoder, and an HDTV. The traditions TVs (LCD or CRT) have low resolution. Thus, we need higher resolution displays to view HD content. The two most prevalent HDTV resolution are

1) 720p

2)1080p  / 1080i

The image below shows how display sizes are categorized.

high definition comparison High Definition Explained

For the best quality, the HD content needs to be carried digitally. For this, a new connector HDMI (High Definition Media Interface) is made which is able to transmit audio and video from a HD decoder (HD Player or a Computer) to HDTV. This decreases the need for extra cables.

hdmi cable High Definition Explained

These are some of the HDTV Capable Displays:

hdtv High Definition Explained

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display hdtv 01 h High Definition Explained

crt televisions vs hdtv High Definition Explained

50 inch panasonic hdtv plasma High Definition ExplainedFigure%203a%20CES%202005 High Definition Explained