Physique du Mappage Tonal HDR, Quantificateur Perceptuel & Tailles de Fenêtre ABL
Contrairement à la luminance relative gamma 2.2 en SDR, HDR10 utilise la Fonction de Transfert Électro-Optique (EOTF) Perceptual Quantizer (PQ) SMPTE ST.2084. La courbe PQ définit des luminances absolues de 0,0001 à 10 000 nits. Si la luminosité maximale de l'écran est inférieure au signal, le processeur applique un mappage tonal pour écrêter ou adoucir les hautes lumières.
Mesure la luminosité maximale pour les petits reflets sans limitation ABL.
Le limiteur automatique évite les surcharges d'alimentation en réduisant le blanc plein écran (ex. 250 nits sur OLED).
Transmet le signal PQ EOTF brut sans courbe secondaire, laissant les consoles contrôler l'écrêtage.
VESA DisplayHDR Compliance Tier Specifications Reference
CTS 1.2 Standards MatrixThe following reference matrix outlines the mandatory hardware performance requirements established by the Video Electronics Standards Association (VESA) DisplayHDR Compliance Test Specification (CTS v1.2) for LCD and OLED displays.
| Certification Tier | Peak 10% Window | Full-Screen White | Max Black Level | Local Dimming | Color Gamut Coverage |
|---|---|---|---|---|---|
| DisplayHDR 400 | 400 cd/m² | 320 cd/m² | 0.40 cd/m² | Global (None) | 95% ITU-R BT.709 (sRGB) |
| DisplayHDR 500 | 500 cd/m² | 320 cd/m² | 0.10 cd/m² | Local Dimming Required | 90% DCI-P3 / 99% BT.709 |
| DisplayHDR 600 | 600 cd/m² | 350 cd/m² | 0.10 cd/m² | Local Dimming Required | 90% DCI-P3 / 99% BT.709 |
| DisplayHDR 1000 | 1,000 cd/m² | 600 cd/m² | 0.05 cd/m² | Multi-Zone FALD Required | 90% DCI-P3 / 99% BT.709 |
| DisplayHDR 1400 | 1,400 cd/m² | 900 cd/m² | 0.02 cd/m² | Advanced Multi-Zone FALD | 95% DCI-P3 / 99% BT.709 |
| True Black 400 (OLED) | 400 cd/m² | 250 cd/m² | 0.0005 cd/m² | Pixel-Level Self-Emissive | 90% DCI-P3 / 99% BT.709 |
| True Black 500 (OLED) | 500 cd/m² | 300 cd/m² | 0.0005 cd/m² | Pixel-Level Self-Emissive | 90% DCI-P3 / 99% BT.709 |
| True Black 600 (OLED) | 600 cd/m² | 350 cd/m² | 0.0005 cd/m² | Pixel-Level Self-Emissive | 90% DCI-P3 / 99% BT.709 |
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Browser & OS Color Management Limitations
Software-based visual evaluation patterns are subject to Web browser color space mapping (sRGB / Display P3), operating system display scaling, ICC profile overrides, and GPU driver settings. While Display Test Online utilizes hardware-accelerated WebGL 2.0 rendering pipelines, browser-based tests cannot fully replace physical hardware colorimeters or spectrophotometers (e.g., Calbrite Display Plus HL, X-Rite i1Display Pro) for color-critical prepress workflows.