Instructions: Display Luminance Survey

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GOALS - Determine luminance and tone-mapping behaviors of Consumer TV's and their display modes

Respository File Contents:

       1. TV Survey Summary Reports (SDR/HDR PDFs)<br/>
       2. TV Playable Test Pattern Files<br/>
            * Codecs: HEVC, AVC, MPEG2<br/>
            * Wrappers: TS, MP4<br/>
       3. Test Pattern Original Sources<br/>
            * Codecs: v210 Uncompressed-10bit QuickTime Wrapped<br/>
       3. Additional Reference Files<br/>
            * Graphic sources<br/>
            * DaVinci Resolve Project Files<br/>
            * Calman Workflow for NIT measurment

Measure Native Full-Screen SDR Images (note difference from L32 - 10% pixel area images):

    1. SDR Native Peak-White<br/>
    2. SDR Mid-Gray from "Gamma-Adjusted"(black to reference-white) down mapping from HLG-to-SDR<br/>
    3. SDR Graphic White for "Linear-scaled" and "Gamma-Adjusted" down mappings from HLG-to-SDR<br/>

Measure Native HDR:

    1. HDR Mid-Gray (ITU-R BT.2408 @ 38% signal level in HLG and PQ (Full-Screen Size) <br/>
    2. HDR Graphic White (Full-Screen)<br/>
    3. HDR 1,000nit (L32-10% Pixel Area)<br/>
    2. HDR 3,930.5nit (L32-10% & 5% pixel area sizes)<br/>

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Test File Usage

    1. Place media files folders (SDR and HDR Folders)on a USB stick and plug into your TV for testing<br/>
    2. Set the TV Mode that you normally use (Cinema/Movie, Standard, Sports, Vivid, etc)<br/>
    3. Note DEFAULT/FACTORY settings for AI/Intelligent or Energy Saver / ECO settings (On or OFF)<br/>
            a) After measuring in "factory settings", make Measurement with the all above modes OFF<br/>
    4. Measure SDR Patterns<br/>
    5. Measure HDR Patterns if applicable<br/>
    7. Enter requested information and image luminance values into survey (links below)<br/>
    8. Repeat the test with each TV display mode (where possible) to see what midtone stretching is occurring<br/>

Surveys

    1. [SDR Display MODE Consumer Survey for ANYONE](https://forms.gle/7PX7YSNEz3odWzY29)<br/>
    2. [SDR Display Luminance Survey for Experts](https://forms.gle/MRcGhh8WgQVUkUSJ9)<br/>
    3. [HDR Display Luminance Survey for Experts](https://forms.gle/nFKsyX6bWNLTkdKt6)<br/>

Spot Meter Measuring

* A spot meter must be used for display measurement accuracy:
    * With Calman (or equivalent) using included Calman workflow (included in Github Repository) for nits measurement
    * [Click here for inexpensive handheld SM208 screen luminance meter via Amazon](https://www.amazon.com/gp/product/B00H050VEI/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1)**<br/>
            **Click RANGE button once on SM208 to set correct range for the measurements**

SDR Test Files

* **Narrow-Range TS AVC and MPEG2 8bit** (Black=16; Peak White=235)
     * 1a Full-Screen SDR Mid-Gray with two tone mappings, SDR Peak White (HEVC)
     * 1b Full-Screen SDR Mid-Gray with two tone mappings, SDR Peak White (AVC)
     * 2a Portrait Display Skin Tone Test Pattern SDR-HLG-SDR Roundtrip (MPEG2)
     * 2b Portrait Display Skin Tone Test Pattern SDR-HLG-SDR Roundtrip (AVC)

HDR Test Files

* **Narrow-Range TS HEVC 10bit** (Black=64; Peak White=940)
* **Full Screen Mid-Gray and Graphics White and L32 for 1,000nits, L32-10%/5% Pixel Area 3,930nits
     * 3- HLG Display Luminance_Test HEVC  (HEVC-Main10 59.94P)
     * 4- PQ Display Luminance Test HEVC 1K-NIT Peak MDCV/CLLI (HEVC-Main10 59.94P)
     * 5- PQ Display Luminance Test HEVC 4K-NIT Peak MDCV/CLLI (HEVC-Main10 59.94P)
     * 6- Portrait Display Skin Tone Test Pattern SDR-to-HLG Upmapping - (HEVC-Main10 59.94P)

Image Descriptions for SDR Test Files 1a-b

* Peak white (100% Peak White Nominal Video Level)
* Hybrid-Linear HDR->SDR Downconvert using NBCU LUT3 - HLG 38% signal level ("mid-gray" or 26nits when normalized at 1,000nits(cd/m<sup>2</sup>)
* Gamma-Adjusted HDR->SDR Downconvert using BBC LUT9C - HLG 38% signal level ("mid-gray" or 26nits when normalized at 1,000nits(cd/m<sup>2</sup>)

• Reference

  • Click here for LUTs Used In DaVinci Resolve Project Referenced in This Repository)
  • Click Here For NBCU UHD HDR/SDR Single-Stream Workflow Recommendation
  • Click Here For Initial Survey Summary During DTG Testing)

• SDR Test File Thumbnail Preview

• HLG Test File Thumbnail Preview

• PQ Test File Thumbnail Preview