On the Calculation and Usage of HDR Static Content Metadata

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE Mot. Imag. J
Volume: 130, No. 7, pp. 51–61
Abstract: HDR10 is a common platform-agnostic video format that is widely used for ultrahigh-definition (UHD-1)/4K content distribution. HDR10 includes 10-bit video data formatted for the perceptual quantization (PQ) electro-optical transfer function (EOTF) using color encoding primaries corresponding to International Telecommunication Union - Radiocommunication (ITU-R) BT.2020 (and BT.2100) and includes optional “static metadata.” HDR10 static metadata typically comprises two different types of metadata, mastering display metadata and content metadata. This paper discusses the meaningful calculation and usage of static content metadata for the display and processing of HDR10 content. Outlier values in the high-dynamic-range (HDR) pixel values can exist in content being mastered today and a simple statistical approach is presented to reduce the outlier’s influence on the static content metadata values. Additionally, this paper describes how a display or process can utilize good and reliable maximum content light level (MaxCLL) values to improve the reproduction of creative intent.
Publication Date: 2021-08-01
DOI: 10.5594/JMI.2021.3090176
ISSN: Print: 1545-0279 | Electronic: 2160-2492
Link: https://doi.org/10.5594/JMI.2021.3090176
Author(s): Michael D. Smith
bio
Michael D. Smith has been a digital imaging and intellectual property consultant since 2003. He is currently a co-editor of the JPEG 2000 High-Throughput image compression standard. In 2018, he received a screen credit for his work on Mary Poppins Returns, which was related to the color science involved in integrating a traditional 2D animation workflow with a modern ACES production pipeline. From 2013 to 2015, he was the co-chair of Blu-ray Disc Association’s UHD-TF Video Subgroup, which defined the video-related requirements for the Ultra HD Blu-ray disc format. His work on more than 35 intellectual property matters related to infringement and validity of patents has resulted in payments of approximately $1.7 billion. He was the editor of the book “ 3D Cinema and Television Technology: The First 100 Years ” published by SMPTE in 2011. He received BS and MS degrees in electrical engineering from the University of California Los Angeles (UCLA), Los Angeles, CA, in 2001 and 2004, respectively.
Michael Zink
bio
Michael Zink is the vice president of technology at Warner Bros. (WB), Burbank, CA, where he is responsible for exploring emerging technologies to enhance WB’s capabilities for production, post-production, and distribution. This includes assessing new technologies and assisting with the setup and integration of digital workflows. He also participates in a number of standards associations such as the Consumer Technology Association (CTA), Digital Cinema Initiatives (DCI), and SMPTE among others and also serves as the chairman for the Ultra High Definition Alliance (UHDA). Prior to joining WB, in 2014, he worked at Technicolor in London, U.K., and Los Angeles, CA, for more than ten years, most recently as the vice president of technology strategy, where he was responsible for launching the production efforts around various new optical disc formats. Additionally, he was responsible for the promotion and adoption of Technicolor technology solutions within industry groups. Earlier in his career, he worked for several media production facilities in Germany.
Keyword(s): HDR, Maximum Content Light Level (MaxCLL), Maximum Frame Average Light Level (MaxFALL), Metadata, Outlier Rejection, Static Metadata
Copyright: © 2021 SMPTE

Bibliographic Reference(s)

Color Volume and Hue-preservation in HDR Tone Mapping [Active]
International Telecommunication Union – Radiocommunication (ITU-R), Report BT.2390-7, “High Dynamic Range Television for Production and International Programme Exchange,” Jul. 2019. in the remapping process instead of the maximum luminance of the mastering display. Using the MaxCLL in this way helps improve the appearance because typically the MaxCLL value is lower than the maximum luminance of the mastering display, which leads to less extreme tone mapping. If the MaxCLL is less than the viewing display’s maximum luminance, then no tone mapping is necessary. The example shown in Figs. 13 and 14 illustrates the concept of how using MaxCLL helps improve the reproduction of creative intent on a 500 nits display. If the content that was mastered on a 4000 nits display only has pixel values that go to 800 nits, the tone EXTERNAL
Consumer Technology Association (CTA)-861.3-A, “HDR Static Metadata Extensions.” Accessed: Mar. 1, 2021. [Online.] Available: https://shop.cta.tech/products/hdr-static-metadata-extensions EXTERNAL
SMPTE EG 432-1:2010 [Active, Stabilized]
SMPTE ST 2086:2018 [Active, Stabilized]

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Michael D. Smith and Michael Zink; On the Calculation and Usage of HDR Static Content Metadata, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 7, August 2021); SMPTE, 2021. Available at https://doi.org/10.5594/JMI.2021.3090176

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Michael D. Smith and Michael Zink; On the Calculation and Usage of HDR Static Content Metadata, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 7, August 2021); SMPTE, 2021. Available at https://doi.org/10.5594/JMI.2021.3090176

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<span class="citation">Michael D. Smith and Michael Zink; <cite>On the Calculation and Usage of HDR Static Content Metadata</cite>, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 7, August 2021); SMPTE, 2021. Available at <a href="https://doi.org/10.5594/JMI.2021.3090176" target="_blank" rel="noopener">https://doi.org/10.5594/JMI.2021.3090176</a></span>

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Michael D. Smith and Michael Zink; On the Calculation and Usage of HDR Static Content Metadata, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 7, August 2021); SMPTE, 2021
doi: 10.5594/JMI.2021.3090176
url: https://doi.org/10.5594/JMI.2021.3090176

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Michael D. Smith and Michael Zink; <cite id="bib-10-5594-jmi-2021-3090176">On the Calculation and Usage of HDR Static Content Metadata</cite>, SMPTE Motion Imaging Journal ( Volume: 130, Issue: 7, August 2021); SMPTE, 2021
<span class="doi">10.5594/JMI.2021.3090176</span>
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