From Wikipedia, the free encyclopedia


High Definition usually refers to 720 vertical lines of video format resolution or more.

Video Format Supported Native Resolution (WH) Pixels (Advertised Megapixels) Aspect Ratio (X:Y) Description
Image Pixel
720p
1280720
1024768
XGA
786,432 (0.8) 16:9 4:3 Typically a PC resolution XGA; also exists as a standardized "HD-Ready" TV on the Plasma display with non-square pixels.
1280720
921,600 (0.9) 16:9 1:1 Typically one of the PC resolutions on WXGA, also used for 750-line video, as defined in SMPTE 296M, ATSC A/53, ITU-R BT.1543, Digital television, DLP and LCOS projection HDTV displays.
1366768
WXGA
1,049,088 (1.0) 683:384
(Approx 16:9)
1:1
Approx
Typically a TV resolution WXGA; also exists as a standardized HDTV displays as (HD Ready 720p,1080i), TV that used on LCD HDTV displays.
1080i
19201080
12801080 1,382,400 (1.4) 32:27
(Approx 16:9)
3:2 Non-standardized "HD Ready", TV. Used on HDTVs with non-square pixels.
1080p
19201080
19201080
2,073,600 (2.1) 16:9 1:1 A standardized HDTV displays as (HD Ready 1080p) TV, that used on LCD HDTV displays. Used for 1125-line video, as defined in SMPTE 274M, ATSC A/53, ITU-R BT.709.
2160p
38402160
38402160 8,294,400 (8.3) 16:9 1:1 Quad HDTV for DCI Cinema 4k standard format, (Currently, there is no HD Ready 2160p Quad HDTV format until 2015).

A common native resolution used in HD Ready LCD TV panels is 1366 x 768[17] pixels instead of the ATSC Standard 1280 x 720 pixels. This is due to maximization of manufacturing yield and resolution of VGA, VRAM that comes with a 768 pixel format. Hence, LCD manufacturers adopt the 16:9 ratio compatible for the HD Ready 1080p video standard. Nevertheless, every HDTV has an overscan processing chipset to fix resolution scaling and color rendering, eg LG XD Engine, SONY BRAVIA Engine. Only when viewing 1080i/1080p HD contents under HD Ready 1080p where there is true pixel-for-pixel reproduction, and for HD ready LCD TV, do some signals undergo a scaling process which results in a 3-5% loss of picture.

Video Format Supported Screen Resolution (WH) Pixels (Advertised Megapixels) Aspect Ratio (X:Y) Description
Image Pixel
720p
1280720
1248702
Clean Aperture
876,096 (0.9) 16:9 1:1 Used for 750-line video with raster artifact/overscan compensation, as defined in SMPTE 296M.
1080p
19201080
18881062
Clean Aperture
2,001,280 (2.0) 16:9 1:1 Used for 1125-line video with faster artifact/overscan compensation, as defined in SMPTE 274M.
1080i
19201080
14401080
HDCAM/HDV
1,555,200 (1.6) 4:3 4:3:1 Used for anamorphic 1125-line video in the HDCAM and HDV formats introduced by Sony and defined (also as a luminance subsampling matrix) in SMPTE D11.

Sponsored Links