Rohde & Schwarz has recently expanded its R&S VTx video tester family to include tests for HLG-capable devices in line with the HDMI 2.0b standard. This video tester family is ideal for testing the performance and interoperability of future generations of HDR/HLG-capable video consumer electronics.

The Hybrid Log-Gamma (HLG) is an enhancement to the HDR technique that allows good-quality replay of state-of-the-art picture material even on non-HDR-capable devices. This is a crucial factor in the successful introduction of the spectacular HDR technique for a more intensive and realistic home theatre experience.

The R&S VTC/VTE/VTS tester family is based on the recently introduced flexible T&M module for HDMI and HDR tests. The new module offers generator and analyser functionality for data rates up to 18Gbit/s as well as functions, such as scrambling, introduced with the new HDMI standard. Now it can also test HLG-capable devices. This includes testing and emulation of the signaling function and the generation of new test patterns.

The generator function can be used to edit the Dynamic Range and Mastering InfoFrame specifically for HDR and HLG. It displays the Enhanced Extended Display Identification Data (E-EDID) of the connected sink, including the HDR metadata block. It also permits the playback of customer-specific, uncompressed moving picture sequences. The analyser unit provides suitable E-EDID and displays the Dynamic Range and Mastering InfoFrame. The video analyser functionality provides bit-accurate display of the electro-optical transfer function (EOTF) in use.

HDR CTS tests are available for both the generator and the analyser.