The UHD Alliance (UHDA) has begun promoting a new consumer-facing logo to identify devices, content and services capable of delivering a premium experience based on agreed specifications, including performance metrics for resolution, high dynamic range (HDR), peak luminance, black levels and wide color gamut among others. The specifications also make recommendations for immersive audio and other features.
“The diverse group of UHDA companies agreed that to realize the full potential of Ultra HD the specs need to go beyond resolution and address enhancements like HDR, expanded color and ultimately even immersive audio. Consumer testing confirmed this,” said UHD Alliance President Hanno Basse. “The criteria established by this broad cross section of the Ultra HD ecosystem enables the delivery of a revolutionary in-home experience, and the ULTRA HD PREMIUM logo gives consumers a single, identifying mark to seek out so they can purchase with confidence.”
For devices, key specs include:
- Image Resolution: 3840x2160
- Color Bit Depth: 10-bit signal
- Color Palette (Wide Color Gamut)
- Signal Input: BT.2020 color representation
- Display Reproduction: More than 90% of P3 colors
High Dynamic Range
- SMPTE ST2084 EOTF
- A combination of peak brightness and black level either:
- More than 1000 nits peak brightness and less than 0.05 nits black level or more than 540 nits peak brightness and less than 0.0005 nits black level
The UHDA, which was established a year ago, has grown to more than 35 companies, including DIRECTV, Dolby Laboratories, LG Electronics, Netflix, Panasonic Corporation, Samsung Electronics, Sony Corporation, Technicolor, The Walt Disney Studios, Twentieth Century Fox, Universal Pictures, Warner Bros. Entertainment, among others.
http://www.uhdalliance.org
