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What are the most important aspects regarding High Definition TV? HD TV Explained covers issues such as HDTV resolutions, interlaced and progressive scanning, data connections, contrast ratios and viewing angles.
HDTV Resolutions Explained
We are all familiar with resolutions in computer specifications i.e. 1024 x 768 (for those that are unfamiliar with the terminology think of the screen as a grid. The grid, in the case of a 1024 x 768 resolution, is 1024 pixels wide and 768 pixels high.
According to the High-Definition Television Standard (BS EN 60107-7:1997) two resolutions are available: 1080 & 720 (just to confuse you only one figure is often quoted!) This figure, however, relates to the height of the image (height is often quoted as lines due to the television's origins in cathode ray tube technology). HDTV Resolutions Explained discusses what resolutions are available with hd tv.
Explaining HDTV Interlaced and Progressive Scanning
So we have both 720 and 1080 resolutions but these can come in two formats progressive (p) and interlaced (i) giving the following options:
720p
1080i
1080p
The HDTV standard requires that televisions are capable of both interlaced & progressive scanning, but what does this all mean? Have a look at our article on 720p Vs 1080i HDTV for an explaination.
HDTV Connections Explained
To comply to the high-definition tv standard all televisions must have either component video, DVI or HDMI inputs. But what is component video, DVI or indeed HDMI? Other inputs such as S-Video, composite video or VGA may well be useful but why? HDTV Connectionss Explained will explain.
Explaining HDTV Contrast Ratio and Viewing Angle
One of the most attractive aspects of HDTV television is the appearance of the television itself i.e. flat and slim. Having a perfectly flat television does however present the problem of how it is viewed. We explain why is Explaining HDTV Contrast Ratio and Viewing Angle important?
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