Black tonal level reproduction in pulse‐width‐modulated high dynamic range displays,Journal of the Society for Information Display

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Black tonal level reproduction in pulse‐width‐modulated high dynamic range displays
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2020-11-02 , DOI: 10.1002/jsid.971
Ronan Boitard ₁ , Stelios Ploumis _{1,

2} , Raveen Kumaran ₁ , Gerwin Damberg ₁ , Anders Ballestad ₁

Affiliation

High dynamic range (HDR) workflows provide increased peak luminance and lower black levels leading to a significantly enhanced quality of experience. HDR pixels also represent more tonal values across the dynamic range by using a higher bit‐depth along with different perceptual transfer functions. However, many light‐emitting display devices modulate light using a limited bit‐depth in the linear domain. It is thus challenging for such display systems to achieve simultaneously high peak luminance and high amount of information in the shadows. In this paper, we summarize pulse‐width modulation (PWM) principles and its impact on low black level reproduction. We then assess the required bit‐depth to accurately reproduce shadow information of an HDR signal for different display capabilities. Finally, we describe several technology improvements that could improve the tonal level reproduction of PWM‐driven displays.

中文翻译：

在脉宽调制的高动态范围显示器中再现黑色色调

高动态范围（HDR）工作流程可提供更高的峰值亮度和更低的黑电平，从而显着提高体验质量。通过使用更高的位深度以及不同的感知传递函数，HDR像素还可以在动态范围内表示更多的色调值。但是，许多发光显示设备在线性域中使用有限的位深度来调制光。因此，对于这样的显示系统来说，在阴影中同时实现高峰值亮度和大量信息是具有挑战性的。在本文中，我们总结了脉宽调制（PWM）原理及其对低黑电平再现的影响。然后，我们评估所需的位深度，以针对不同的显示功能准确地再现HDR信号的阴影信息。最后，

更新日期：2020-11-02

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