Some 35 years ago, Japan presented their parameters at an international meeting of television engineers in Algiers in 1981 and Japan’s public network (NHK) presented their analog High Definition TeleVision (HDTV) system at a Swiss conference in 1983.
Except for these early formats, HDTV is Digital broadcast and therefore its introduction will sometimes coincide with the introduction of DTV, or digital television.
The signals for high definition require a high definition television or a computer monitor in order to be watched or viewed. High definition video will normally have an aspect ratio of 16:9 (the standard ration of tv screens worldwide today). The aspect ratio of the regular wide-screen film that is shot today is normally 1:85:1 or 2:40:1. The standard square type of television has a 4:3 aspect ratio.
High definition television resolution is 1080 or 720 lines. With the contrast, regular digital television is 480 lines or 576 lines. On relatively recently has the quality of DVD reached HD standard,with the advent of such high definition systems such as HD-DVD and Blu-Ray (Bluetooth).
The most noted feature with high definition video is the fact that it’s so lifelike. There are HDTV and HD video cameras. High definition is very popular these days, with television being at the top of the list.
High quality video cameras are getting just as popular, as they offer you the chance to capture memories like never before. In fact, HD offers you video like never before, making you wonder: if the quality is this good now – just what will video in the future actually be like?