980 HDMI 2.0 Video Generator Module. Application Note UHD Alliance Compliance Testing with the UHDA Test Pattern Pack

Transcription

1 980 HDMI 2.0 Video Generator Module Application Note UHD Alliance Compliance Testing with the UHDA Test Pattern Pack Rev: A6 Page 1 August 19, 2016

2 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, 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 Page 2 August 19, 2016

3 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% E.g. 2: 40% Phase 2: Option 1 E.g.1: 10% E.g. 2: 40% Phase 1: 0: 10% Center Box White 1: 20% Center Box White 2: 30% Center Box White 3: 40% Center Box White Phase 2 - Option 1 Image A: 10%, 20%, 30%, 40% Center Box Image B: 2%, 5%, 10% 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. Value for white area of the patterns shall be maximum Value for Full Range for Narrow Range. Value for black area of pattern is 0 for Full and 64 for Narrow. 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 example screens E.g.1: 10% Phase 2 - Option 2 Image A: 10%, 20%, 30%, 40% Image B: 5%, 10%, 20%, 30%, 40% Image C: 10%, 20%, 30%, 40% 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% Page 3 August 19, 2016

4 Section Test Description Test Pattern Ex. #1 Rendition No. Comments Phase 2: Option 2 example screens (not all screen options shown) E.g.1: 10% E.g. 2: 40% Phase 2 - Option 3 Image A: 10%, 20%, 30%, 40% Image B: 5%, 10%, 20%, 30%, 40% Image C: 10%, 20%, 30%, 40% Orientations: Centered, Vertical, Horizontal Phase 2 - Option 3 Measures peak white luminance in Reference Mode. Two or three patterns are used for the test depending on the orientation selected. Patterns are cycled through while measurements are taken. Page 4 August 19, 2016

5 Section Test Description Test Pattern Ex. #1 Rendition No. Comments Section 4.3 High Dynamic Range: Black Level E.g.1: Corner Black Box E.g.2: Image Signal Black 0: Corner Box Black: 2.5 x 4=10% size gray box Parameter set 1 (See Comments) 1: Corner Box Black: 2.5 x 4=10% size gray box Parameter set 2 (See Comments) 2: Image Signal Black (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): for Full Range for Narrow Range. Value of corner boxes (Param 2): for Full Range 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 for Full Range for Narrow Range. Section 4.4 High Dynamic Range: Tone Mapping 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. Section 4.5 Wide Color Gamut E.g.1: Red Coverage E.g.2: Coverage 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. Page 5 August 19, 2016

6 Section 4.6 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= Blue: R=321; G=221; B=615. Narrow Range - Red: R=566; G=336; B=64 - Green: R=449; G=586; B= Blue: R=339; G=253; B=590. Resolution 0: UHD Resolution Test uses visual inspection to determine compliance. There is 1 pattern which is at least 3840 x 2160 pixels. Section 4.7 Input Frame Rate and Bit Depth 0: Designated Resolution 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 Parameter Set #1 (Luminance cd/m^2) 0 (Lum = 10.51) 1 (Lum = ) 2 (Lum = ) 3 (Lum = ) 4 (Lum = ) 5 (Lum = ) 6 (Lum = ) 7 (Lum = ) 8 (Lum = ) 9 (Lum = ) 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. Page 6 August 19, 2016

7 Parameter Set #2 (Luminance cd/m^2) 10 (Lum = 5.031) 11 (Lum = ) 12 (Lum = ) 13 (Lum = ) 14 (Lum = ) 15 (Lum = ) 16 (Lum = ) 17 (Lum = ) 18 (Lum = ) 19 (Lum = ) Parameter Set 1 Full Range to 737 varied over 10 patterns Narrow Range to 695 varied over 10 patterns Parameter Set 2 Full Range to 668 varied over 10 patterns Narrow Range to 636 varied over 10 patterns 1.2 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. Page 7 August 19, 2016

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9 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. Page 9 August 19, 2016

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11 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.) Page 11 August 19, 2016

12 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.) Page 12 August 19, 2016

13 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). Page 13 August 19, 2016

14 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. Page 14 August 19, 2016

15 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 Page 15 August 19, 2016

16 The following screen example shows the 4.2 Center Box test selected. Page 16 August 19, 2016

17 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. Page 17 August 19, 2016

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22 The following screen shot shows the Section 4.3 test Corner Box/Signal Black test. Page 22 August 19, 2016

23 The following screen shot shows the Section 4.4 test Grey Step. Page 23 August 19, 2016

24 The following screen shot shows the Section 4.5 test Color Gamut. Select the Coverage and Tolerance parameters in accordance your test specifications. Page 24 August 19, 2016

25 The following screen shot shows the Section 4.6 test Resolution. Page 25 August 19, 2016

26 The following screen shot shows the Section 4.7 test Frame Rate/Depth. Page 26 August 19, 2016

27 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 Page 27 August 19, 2016