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Dolby HDR(Dolby High-Dynamic Range) A family of LED backlight technologies for LCD TVs from Dolby Laboratories.
Introduced in 2008, Dolby Contrast is an LED backlight technology that uses local dimming to increase the dynamic range between the brightest and darkest pixels of the image. See LED TV.
Dolby Vision offers a dynamic range of 4,000 nits and beyond; however, additional data must be incorporated into the signal. TV sets with Dolby Vision are expected in 2015. See HDR, LCD and LED.