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HD ready concerns the ability of television receivers to display high-definition pictures. The term has had official use in Europe since January 2005 when, EICTA (European Information, Communications and Consumer Electronics Technology Industry Associations) announced the requirements for the label.

EICTA introduced the label as a quality sign for the differentiation of display equipment, capable of processing and displaying high-definition signals. It is awarded on the basis of minimum functionality requirements that are detailed in the "EICTA conditions for HD Labelling of Display Devices".

In the USA, "HD Ready" refers to any display that is capable of accepting and displaying a high-definition signal at either 720p, 1080i or 1080p using a component video or digital input, and does not have a built-in HD-capable tuner.

HD ready requirements
In order to be awarded the label "HD ready" a display device has to cover the following requirements:
Display, display engine - The minimum native resolution of the display (e.g. LCD, PDP) or display engine (e.g. DLP) is 720 physical lines in wide aspect ratio.
Video Interfaces - The display device accepts HD input via:
Analog YPbPr. "HD ready" displays support analog YPbPr as a HD input format to allow full compatibility with today's HD video sources in the market. Support of the YPbPr signal should be through common industry standard connectors directly on the HD ready display or through an adaptor easily accessible to the consumer; and:
DVI or HDMI

HD capable inputs accept the following HD video formats:
1280x720 @ 50 and 60Hz progressive scan ("720p"), and
1920x1080 @ 50 and 60Hz interlaced ("1080i")
The DVI or HDMI input supports copy protection (HDCP)

The following technical references apply to the above descriptions:
DVI: DDWG, "Digital Visual Interface", rev 1.0, Apr 2, 1999 as further qualified in EIA861B, "A DTV Profile for Uncompressed High Speed Digital Interfaces" May 2002, furthermore allowing both DVI-D and DVI-I connectors, requiring compliance to both 50 and 60Hz profiles, and requiring support for both 720p and 1080i video formats.
HDMI: HDMI Licensing, LLC, "High-Definition Multimedia Interface", rev.1.1, May 20, 2004
HDCP: Intel, "High-Bandwidth Digital Content Protection System", rev 1.1, June 9, 2003.
(NB: on DVI HDCP rev 1.0 will apply)
YPbPr: EIA770.3-A, March 2000, with the notice that the connectors required may be available only through an adaptor.

HD ready caveats
The fact that a product bears the label "HD ready" does not necessarily mean that it can display the full picture resolution possible from a HD source. Most HD-ready sets do not have enough pixels to give true pixel-for-pixel representation without interpolation of the higher HD resolution (1920x1080) - or (in rare cases) even the lower HD resolution (1280x720) horizontally (CRT based sets, or the plasma-based sets with 1024x768 resolution).

The term HD compatible is also being used in Europe to indicate that a display device has HDMI capability but with lower than HD-ready resolution.

1080p HD
1080p is the shorthand name for a category of display resolutions. The number "1080" represents 1,080 lines of vertical resolution, while the letter p stands for progressive scan (meaning the image is not interlaced). 1080p is considered a HDTV video mode. The term usually assumes a widescreen aspect ratio of 16:9, implying a horizontal resolution of 1920 pixels. This creates a frame resolution of 19201080, or 2,073,600 pixels in total. The frame rate in Hertz can be either implied by the context or specified after the letter p, such as 1080p30, meaning 30 Hz.

1080p is sometimes referred to in marketing materials as "Full High-Definition". Although 2K/4K digital cinema technology is commercially available, and ultra-high definition video is in the research phase, 1080p and 1080i are currently the highest-resolution formats widely used for broadcasting and consumer distribution of video content.

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