APSIPA Transactions on Signal and Information Processing > Vol 7 > Issue 1

The technology behind the exceptional visual experience via high dynamic range

Industrial Technology Advances

Neeraj J. Gadgil, Dolby Laboratories Inc., USA, Neeraj.Gadgil@dolby.com , Qing Song, Dolby Laboratories Inc., USA, Guan-Ming Su, Dolby Laboratories Inc., USA, Samir N. Hulyalkar, Dolby Laboratories Inc., USA
 
Suggested Citation
Neeraj J. Gadgil, Qing Song, Guan-Ming Su and Samir N. Hulyalkar (2018), "The technology behind the exceptional visual experience via high dynamic range", APSIPA Transactions on Signal and Information Processing: Vol. 7: No. 1, e17. http://dx.doi.org/10.1017/ATSIP.2018.21

Publication Date: 05 Dec 2018
© 2018 Neeraj J. Gadgil, Qing Song, Guan-Ming Su and Samir N. Hulyalkar
 
Subjects
 
Keywords
High dynamic range (HDR) videoSignal quantizationVideo coding and transmissionVideo display technology
 

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This is published under the terms of the Creative Commons Attribution licence.

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In this article:
I. INTRODUCTION 
II. HDR SIGNAL QUANTIZATION 
III. COLOR SPACES FOR HDR 
IV. CODING HDR SIGNALS 
V. INDUSTRY ADAPTATIONS 
VI. THE FUTURE OF HDR TECHNOLOGY 
VII. CONCLUSION 

Abstract

High dynamic range (HDR) technology is rapidly changing today's video landscape by offering spectacular visual experiences. The development in display technology to support higher luminance levels for commercial and consumer electronic devices such as TVs, smartphones, projectors etc., has created an exponential demand for delivering HDR content to viewers. The essential component of the HDR technology is “expanded contrast,” which allows richer black levels and enhanced brightness, providing dramatic contrast that reveals finer details. The use of “wide color gamut” allows wider color spectrum and richer colors providing aesthetically pleasing true-to-life feel. Such visual enhancements clearly establish HDR as one of the most significant upcoming video technologies.

In this paper, we review major technical advances in this exciting field of study. Quantization of HDR signals is reviewed in the context of transfer functions that convert optical signals to electrical signals and vice versa. They mainly consist of Perceptual Quantization and Hybrid-Log-Gamma approaches. Compression of HDR content is another broad area of study involving several coding approaches, often categorized in terms of backward-compatibility and single/dual layer methods. Some key industry applications of HDR processing systems are also discussed, followed by some future directions of HDR technology.

DOI:10.1017/ATSIP.2018.21