» What Is High Definition Video?

High definition video refers to a number of video modes of higher resolution than normal video resolution in earlier standards. The term high definition is often abbreviated HD. HD content has a wide range of applications from HD movies and television broadcasts to HD video games.

In order to view high definition video content, one must have a display system capable of high resolution. These include computer screens, HD ready television sets and movie projectors. In order to be considered HD ready a display system needs to have a resolution of at least 720 vertical lines.

The actual video modes in HD standards range from 720 to 1080 vertical lines. The video may be either progressive or interlaced (non-progressive), which are labeled for example 720p or 720i respectively. Different frequencies can also be supported, and shown in labeling in the format 720p/50 for a frequency of 50 frames per second.

In addition to the display unit, the video source must also be high definition compatible. This means that to watch high definition movies, the DVD player must also be HD ready. Similarly, to enjoy the benefits of a HD television set, the television broadcast must be in high definition format.

For a good home theater system, all the parts of the system need to be able to handle high definition video. This includes not only the above mentioned DVD player and television set, but also all the connections used between them. The source media must naturally also be in a format of HD resolution.