Sunday, February 27, 2011

Comparing digital HDTV display options

Comparing digital HDTV display optionAuthor: onlinemarketing1

There are different types of HDTVs that are available ranging from plasmas, LCD/LED, projection and rear projector based HDTVs. Choosing the right HDTV can be a bit complex because there are different resolutions of HD that are used by different manufacturers.

For most manufacturers, HD or high-definition is described as any image that is displayed in with more than 1280 pixels per 720 lines of resolution. HD has been available for some time on computer based CRT and LCD display monitors although most of them were not used for television broadcasting purposes. The push to use LCD and CRT based monitors was driven by research to develop better picture resolution broadcasting in the early 1990s and though originally introduced to most countries before the turn of the century; it was not adopted until late 2006 when media regulators made a digital broadcasting switch mandatory for all media stakeholders. Since the announcement, digital based HDTVs have become hot selling items as have new levels of HD resolution. There are several HD resolutions that are used on most HDTVs, 720p (720 lines of progressive scanning), 1080i (1080lines of interlaced resolution), 1080p or Full HD.

720p. Most HDTVs can support the 720p HD resolution, although often stated as 720 lines of progressive scanning, 720p HD is actually 1366 x 768 or 1366 pixels by 768 lines of resolution. Because the additional lines have no benefit to 720p HD, they are not referred to when advertised. As the entry level of high-definition, 720p HD is often referred to as HD ready and the label HD ready HDTVs refers to a TV that can support at least 720p HD.

1080i. 1080i is an HD broadcasting format used widely in countries like the US. Although it is not an HD resolution per se, it is used to refer to the quality of a HD broadcaster’s picture resolution and is an alternative to 720p broadcasting. Some regard 1080i as nearly full HD instead of full HD because its picture quality is close to that of full HD 1080p but is not because a few differences in the technology used to display and broadcast each format.

1080p often referred to as Full HD, 1080 p is essentially 1920 pixels by 1080 lines of progressive resolution that displays a full 16:9 aspect ratio picture and is considered the highest possible resolution available on consumer HDTVs today. An 1080p HDTV can support 720p, 1080i and Full HD and will display the pictures without flickering or downscaling the signal. Although 1080p is full HD it is not used for broadcasting because of its high bandwidth requirements but it used for DVD/Blu-ray and digital media content.