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Member Login Welcome to theUHD Alliance. The UHD Alliance comprised of the worlds leading consumer electronics manufacturers film and television studios content distributors and technology companies establishes performance requirements for resolution high dynamic range color and other video and audio attributes with an eye toward giving consumers the best possible 4K UHD with HDR experience. Home entertainment products mobile devices and content meeting these certification requirements bear the UHDAs Premium Logo marks making them easy for consumers to identify and purchase with confidence. Why choose 4KUltra HD PremiumandMobile HDR Premium.