The UHD Audiovisual Era Has Arrived
Dynamic
Range
From standard dynamic range (SDR) to high dynamic range (HDR)
Resolution
From standard definition (SD)/high definition (HD) to ultra-high definition
Sound
From silent to mono,stereo, surround, and 3D
Color
From monochrome to dual-color, tri-color ,and wide color gamut
Frame Rate
From 16 Hz to 24 Hz, 50/60 Hz, 120 Hz,and high frame rate (HFR)
FOV
Broadening the viewing angle beyond 100° for greater immersion
DoF
3D display modes that bridge the gap between real and virtual worlds
Video is a key medium for information recording and transmission. Video technology has evolved from analog to digital SD to digital HD, and most recently to UHD (4K/8K). UHD videos carry more information and offer greater practical value. They provide users with clearer images, a broader field of view (FoV), more vivid colors, and smoother streams to generate endlessly immersive audiovisuals. In addition to radio, television, and cultural entertainment, UHD technologies have also been broadly applied in the security surveillance and medical imaging sectors, to help doctors and engineers complete operations with greater precision. HDR serves as the basis of the UHD technology system, which has spurred the development of the innovative video era.
HDR Vivid is the HDR video technology standard released by the China UHD Video Industry Alliance (CUVA). Compared with traditional technologies, HDR Vivid features greater contrasts, while also offering 3D display capabilities, enabling users to view lifelike images in more brilliant hues, with greater detail in dark regions, and more accuracy in bright regions.
4000 nits of brightness (40x higher)
BT.2020 compliant, 1.37x DCI-P3 color space (72% higher)
Scene-specific brightness and color mapping algorithms, for richer detail in both bright and dark regions
Highlights
HDR: Making Images True to Life
HDR is one of the most important features of UHD videos, expanding the display range of SDR and offering a wider color gamut.
HDR provides for enriching detail in both bright and dark regions,
greater contrasts and grayscale,
to make HDR images more appealing at a glance.
HDR Vivid: Approaching Human Sight
HDR is one of the most important features of UHD videos, expanding the display range of SDR and offering a wider color gamut.
HDR provides for enriching detail in both bright and dark regions,
greater contrasts and grayscale,
to make HDR images more appealing at a glance.
HDR Industry Challenges
Different Display Effect
High Patent Fees
For Certain Standards
Of UHD Media Sources
HDR Vivid’s Solution
Defining UHD PQ
HDR Vivid delivers highly-accurate dynamic range mapping for display devices, by adding dynamic metadata, maximizing the original effects from HDR sources.
HDR Vivid publicly defines the HDR process of UHD video presentation and processing in the form of group standards, ensuring that high-quality video is faithfully reproduced. Based on the existing HDR, dynamic metadata is added to provide more accurate dynamic range mapping for the display device, so as to restore the original artistic effects of the HDR content to the greatest possible extent. In addition, HDR Vivid embeds dynamic metadata from front-end production, ensuring that the device computing power can be realized, and that processing effects are controllable and predictable. Compared with the existing private HDR technology within the industry, HDR Vivid represents a more open and universal technical standard and solution. HDR Vivid is more suitable for all parties, spurring industry-wide deployment via open technology and enhanced security.
E2E Media System Standard
HDR Vivid offers an E2E media system standard to ensure backward compatibility.
Existing UHD HDR videos can be smoothly upgraded to HDR Vivid videos, lowering the technical implementation threshold. Dynamic metadata from HDR sources is extracted and encoded in the front-end production phase, and no modifications are required during transmission. Adaptation is performed based on dynamic metadata on the device side.
Implementation and Adaptation
The comprehensive HDR Vivid device-side implementation solution has helped facilitate the evolution to high-standard images.
Standard compliance test and certification are conducted on devices, such as TV, set-top boxes (STBs), and codecs that directly affect the display quality, according to strict certification specifications.
HDR Vivid Metadata
Data: minimum_maxrgb, average_maxrgb, variance_maxrgb, maximum_maxrgb
Curve parameters: including HDR→HDR and HDR→SDR (100 nits)
Batch Production and Broadcasting Tools
UHD videos can be produced in batches, using the automated and manual UHD video production and broadcasting tools.
Only dynamic metadata generation is added to the production phase, without changing the original HDR10 and HLG HDR production processes. The easy-to-use graphical user interface (GUI) is used to help producers manually debug the dynamic metadata. An automatic dynamic metadata generation tool is provided to support batch production, and reduce development costs.
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