Transcript
980 HDMI 2.0 Video Generator – Application Note
Rev. A6
980 HDMI 2.0 Video Generator Module Application Note UHD Alliance Compliance Testing with the UHDA Test Pattern Pack Rev: A6
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980 HDMI 2.0 Video Generator – Application Note
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1. Testing UHD Displays with UHD Alliance Test Patterns This application note provides procedures for testing UHD-capable TVs with the optional UHD Alliance Test Pattern Pack using the 980 HDMI 2.0 Video Generator module. The module can be equipped in either of the following 980 Advanced Test Platforms: 1) The 980B Advanced Test Platform – 5-slot chassis with a 15 inch touch display 2) The 980R Advanced Test Platform - 5-slot rack mountable chassis with a 7 inch touch display The 980 HDMI 2.0 Video Generator module supports video pattern testing and audio testing of 4Kx2K (ultra-high definition) HDMI 2.0 sink devices with pixel rates up to 600MHz. It is equipped with one (1) Tx port. The 980 GUI Manager is a PC application to manage and use the 980 HDMI 2.0 Video Generator module.
1.1
UHD Alliance Testing – Overview
The UHD Alliance test patterns are called out in the Ultra-High Definition Alliance Test Specification, Version 1.01 January 27, 2015. The test pattern pack is required to assess a UHD TV’s compliance to all tests in the specification including:
Section 4.2 High Dynamic Range: Peak White
Section 4.3 High Dynamic Range: Black Level
Section 4.4 High Dynamic Range: Tone Mapping
Section 4.5 Wide Color Gamut
Section 4.6 Resolution
Section 4.7 Input Frame Rate and Bit Depth
Section 4.8 Grey-Scale Tracking
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The following table describes the UHD Alliance Test Patterns. For a complete description of these patterns please refer to the UHD specification. Note: UHDA “Full Range Code Values” and “Narrow Range Code Values” are selected via “Full” and “Limited” settings of the Video Format “Range” parameter, respectively). We prefer to use the terms “Full” and “Limited” as they are the industry standard terms used to describe range as defined in CEA-861. Section
Test Description
Test Pattern Ex. #1
Rendition No.
Comments
Section 4.2
High Dynamic Range: Peak White
Phase 1: E.g.1: 10%
Phase 1: 0: 10% Center Box White 1: 20% Center Box White 2: 30% Center Box White 3: 40% Center Box White
Purpose: Test measures the maximum luminance at the center position in Reference Mode. Test uses spectroradiometer to determine compliance. There are 4 pattern renditions with the white center box ranging in size from 10% to 40% of the image.
E.g. 2: 40%
Value for white area of the patterns shall be maximum Value. - 1023 for Full Range - 940 for Narrow Range. Value for black area of pattern is 0 for Full and 64 for Narrow. Phase 2: Option 1 E.g.1: 10%
Phase 2 - Option 1 Image A: 10%, 20%, 30%, 40% Center Box Image B: 2%, 5%, 10%
Purpose: Test measures the luminance over time for UHDTVs that have a screen saver mode. Phase 2 - Option 1 Luminance measurements taken at 30 seconds, 15 minutes, 20 minutes and 30 minutes. Test uses alternating images A & B.
Phase 2 - Option 2
Phase 2 - Option 2 – Measures peak white luminance in Reference Mode. Three patterns of each size image are used. Test patterns are cycled through multiple times.
E.g. 2: 40%
Phase 2: Option 2 example screens E.g.1: 10%
Image A: 10%, 20%, 30%, 40% Image B: 5%, 10%, 20%, 30%, 40% Image C: 10%, 20%, 30%, 40%
E.g. 2: 40%
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980 HDMI 2.0 Video Generator – Application Note Section
Test Description
Test Pattern Ex. #1
Rendition No.
Comments
Phase 2: Option 2 example screens (not all screen options shown)
Phase 2 - Option 3
Phase 2 - Option 3 – Measures peak white luminance in Reference Mode.
E.g.1: 10%
E.g. 2: 40%
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Image A: 10%, 20%, 30%, 40% Image B: 5%, 10%, 20%, 30%, 40% Image C: 10%, 20%, 30%, 40% Orientations: Centered, Vertical, Horizontal
Two or three patterns are used for the test depending on the orientation selected. Patterns are cycled through while measurements are taken.
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Section
Test Description
Test Pattern Ex. #1
Rendition No.
Comments
Section 4.3
High Dynamic Range: Black Level
E.g.1: Corner Black Box
0: Corner Box Black: 2.5 x 4=10% size gray box Parameter set 1 (See Comments)
Test uses spectroradiometer to determine compliance. There are 3 patterns. Two Corner box renditions and one Image Signal Black. Corner Black Box Value of background: - 0 for Full Range - 64 for Narrow Range. Value of corner boxes (Param 1): - 713 for Full Range - 675 for Narrow Range. Value of corner boxes (Param 2): - 701 for Full Range - 664 for Narrow Range. Image Signal Black Contains a center black box (4%) surrounded by 32 steps uniformly increased by 48 pixels in the horizontal direction and 27 pixels in the vertical direction. Value for black area of patterns shall be maximum Value. - 1023 for Full Range - 940 for Narrow Range.
E.g.2: Image Signal Black
Section 4.4
Section 4.5
High Dynamic Range: Tone Mapping
Wide Color Gamut
E.g.1: Red Coverage
E.g.2: Coverage
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1: Corner Box Black: 2.5 x 4=10% size gray box Parameter set 2 (See Comments) 2: Image Signal Black (See Comments)
0: Center Box Grey Step
Test uses spectroradiometer to determine compliance. Test uses a single test pattern. The tone mapping area of the pattern is centered both horizontally and vertically on the pattern. The height of the pattern is one half the overall height of the pattern. The width of the pattern is three quarters the width of the overall pattern. There is a single pattern with steps that vary: - 0 thru 923 for Full Range - 64 thru 854 for Narrow Range.
0: Red Coverage 1: Green Coverage 2: Blue Coverage 3: Red Tolerance 4: Green Tolerance 5: Blue Tolerance
Test uses spectroradiometer to determine compliance. There are 6 full field color patterns. Coverage Full Range - Red: R=1023; G=0; B=0 - Green: R=0; G=1023; B=0. - Blue: R=0; G=0; B=1023.
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Section 4.6
Resolution
0: UHD Resolution
Section 4.7
Input Frame Rate and Bit Depth
0: Designated Resolution
Narrow Range - Red: R=940; G=64; B=64 - Green: R=64; G=940; B=64. - Blue: R=64; G=64; B=940. Tolerance Full Range - Red: R=586; G=318; B=0 - Green: R=450; G=610; B=244. - Blue: R=321; G=221; B=615. Narrow Range - Red: R=566; G=336; B=64 - Green: R=449; G=586; B=273. - Blue: R=339; G=253; B=590. Test uses visual inspection to determine compliance. There is 1 pattern which is at least 3840 x 2160 pixels. Test uses visual inspection to determine compliance. The test uses 3840x2160 resolution with BT2020 color space at 10 bit depth.
Note: This test pattern shall be rendered as Frame Rate, Pixel Encoding, Code Range, Resolution, Color Space, and Bit Depth are varied by loading 8 difference Video Formats listed in the table below (see pages 10 and 11).
Section 4.8
Grey-Scale Tracking
E.g.1
E.g.2
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Parameter Set #1 (Luminance cd/m^2) 0 (Lum = 10.51) 1 (Lum = 50.825) 2 (Lum = 100.230) 3 (Lum = 135.158) 4 (Lum = 181.318) 5 (Lum = 242.201) 6 (Lum = 322.392) 7 (Lum = 427.927) 8 (Lum = 566.771) 9 (Lum = 749.468)
Test uses spectroradiometer to determine compliance. There are 20 patterns with varying grayscale values in a center box. The center box is 10% the size of the image. The background is value 0 for full range and 64 for narrow range. The patterns are divided into Pattern Set 1 and Pattern Set 2.
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Parameter Set #2 (Luminance cd/m^2) 10 (Lum = 5.031) 11 (Lum = 25.219) 12 (Lum = 50.305) 13 (Lum = 68.885) 14 (Lum = 93.610) 15 (Lum = 126.396) 16 (Lum = 169.748) 17 (Lum = 226.949) 18 (Lum = 302.311) 19 (Lum = 401.505)
1.2
Parameter Set 1 Full Range - 307 to 737 varied over 10 patterns Narrow Range - 327 to 695 varied over 10 patterns Parameter Set 2 Full Range - 254 to 668 varied over 10 patterns Narrow Range - 282 to 636 varied over 10 patterns
UHD Test Setup
For testing a UHD-Capable TV, the 980 HDMI 2.0 Video Generator module offers the necessary high resolution format, the test patterns and ease of use to quickly conduct functional testing using visual assessment or to conduct UHD compliance tests (Spectroradiometer required). When the UHD test patterns are selected through the 980 GUI interface, the module emulates an UHD-capable source by transmitting the UHD test pattern and, where required, the module will also transmit the necessary Dynamic Range and Mastering InfoFrame metadata. The Dynamic Range and Mastering InfoFrame data includes an Electro-Optical Transfer Function (EOTF) and the Static Metadata with the dynamic range of the video stream. The following illustration depicts the test setup.
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2. UHD Alliance Test Procedures Follow the procedures below to run functional tests or compliance tests on a UHD-capable TV. 1. From the main window of the 980 GUI Manager Card Control Page, select Generator
A blank Generator panel appears as shown below. 2. Select the Connect activation button on the upper right. Note: You will not have to use the Connect button if operating the instrument through the embedded GUI.
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3. Select the HDMI 2.0a Video Generator module from the right side panel. Indicated in the screen shot example below. 4. Select a UHD format using either the Left to Right selection process or the Browse method. An example of each method is shown in the screen shots that follow. 5. Select the Interface button at the top left, and make sure HDMI is selected (Not HDMI_DVI.)
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6. Choose the EDID button at the center near the top (refer to the screen shot below). 7. On this screen, just make sure the Hot-Plug Formats Mode is not selected at the lower left (round button should be gray rather than green.)
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8. Select the Tools tab near the top right, then select UHDA Test on the left panel of applications to access the UHDA sink compliance tests (see screen shot below).
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9. In the top section, under Select a 2160p+BT2020 Mode, select one format button at a time. Then select either Full Range or Limited (Narrow) Range.
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10. In the bottom section, Select a Test from the pull-down list. The buttons below will change to reflect the individual patterns or parameters corresponding to the selected test. Make one selection (Test 4.2 Center Box shown in example below). Run each test using the procedures specified in the UHDA Test Specification: Device Test Specification document. The following screens show examples of the dialog box for each test. Refer to the table in Section 1 for information about each test. Note: When running at test, click on the Apply button, and allow several seconds for the instrument to update to the selected settings. When the settings are completed, the setting indicators at the top of the screen will be updated to reflect the current selections. You may proceed with the current test
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The following screen example shows the 4.2 Center Box test selected.
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There are two phases of the 4.2 Center Box test. The first test uses a static test pattern. The second Phase uses a dynamic test pattern. The options and associated selections for the Phase 2, 4.2 Center Box test are depicted on the following screen examples.
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The following screen shot shows the Section 4.3 test – Corner Box/Signal Black test.
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The following screen shot shows the Section 4.4 test – Grey Step.
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The following screen shot shows the Section 4.5 test – Color Gamut. Select the Coverage and Tolerance parameters in accordance your test specifications.
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The following screen shot shows the Section 4.6 test – Resolution.
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The following screen shot shows the Section 4.7 test – Frame Rate/Depth.
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The following screen shot shows the Section 4.8 test – Center Box Grey. Select the Parameter Set 1 and 2 values in accordance with our test specifications.
End of Procedure
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