HDTV? Que nada, UHTV

HDTV? Que nada, UHTV

A NAB-2007 foi realizada nos dias 16, 17 e 18 de abril, e mostrou muitas novidades. Uma delas foi um protótipo da NHK, a TV estatal japonesa, que pretende ser, daqui a poucos anos, a sucessora da atual HDTV (High Definition TV). Se chama Ultra High Definition Television (U-HDTV ou apenas UHTV) e promete ter uma resolução até 16 vezes maiordo que a HDTV.

A TV de alta definição tem, no mínimo, 1.080 linhas de 1.600 pixels (ou 1,8 milhão de pixels), enquanto a futura UHTV terá uma imagem formada por 7.680 linhas de 4.320 pixels cada uma, o equivalente a 32 milhões de pixels. Com tal definição, os monitores poderão chegar a 450 polegadas de diagonal (~ 11,43 metros) oferecer 20 canais de áudio de alta fidelidade.


WUXGA
WUXGA stands for Widescreen Ultra eXtended Graphics Array and is a display resolution of 1920 x 1200 pixels with a 16:10 screen aspect ratio.
This resolution is currently available in high-end LCD televisions and computer monitors. Dell sells a notebook with a 15" LCD screen that has this resolution. Apple sells a 23" Cinema Display that has this resolution.


UXGA
Ultra eXtended Graphics Array is an abbreviation referring to a standard monitor resolution of 1600 x 1200 pixels. Dell Computer refers to the same resolution of 1,920,000 pixels as UGA.

SXGA
Super eXtended Graphics Array is an abbreviation referring to a standard monitor resolution of 1280 x 1024 pixels. This resolution of 1,310,720 pixels is an enhancement of the standard XGA resolution that IBM developed in 1990.
This resolution is a very strange resolution as it is not the standard 4:3 ratio but a 5:4 ratio. A standard 4:3 monitor using this resolution will therefore not have square pixels, but rectangular ones. This is especially a problem with LCD monitors which have a fixed resolution.

A resolution of 1280 x 960 is also often supported, which has the standard 4:3 ratio.


XGA
eXtended Graphics Array is an IBM display standard introduced in 1990. XGA supports a resolution of 1024 x 768 pixels with a palette of 256 colours, or 640 x 480 with high colour (16 bits per pixel). XGA-2 added 1024 x 768 support for high colour and higher refresh rates, improved performance, and supports 1360 x 1024 in 16 colours.

A UHTV só deverá ser lançada no mercado a por volta de 2015 a 2020.