After calibration, the colour reproduction in SDR content on the LG NANO82T is very good. The white balance has been effectively improved, resulting in natural and balanced shades across various scenes. The gamma has also been adjusted, providing a more precise rendering of details both in shadows and bright parts of the image. Thanks to these adjustments, the television performs excellently in everyday use, offering solid colour quality and clear, well-balanced images in SDR mode.
However, in the case of HDR content, the situation is worse. The television does not support a wide colour gamut, limiting the depth and richness of colours that HDR can offer. The EOTF curve deviates from the ideal, leading to excessive accentuation of details in bright parts of the image. Unfortunately, this results in significant colour reproduction errors, as confirmed by tests on the Colour Checker. The low brightness level of the panel further negatively impacts the quality of HDR images, causing dynamic range effects to not be fully realised, and colours to appear washed out.
The television has significantly improved after calibration, especially in SDR content. The improvement in white balance and gamma has greatly enhanced image quality, providing a more natural and coherent colour reproduction. Compared to the pre-calibration state, the difference is noticeable, and the television now offers better performance in everyday use, particularly in the standard dynamic range.
Hisense A7NQ offers several tools that allow for improved image quality, so we decided to take matters into our own hands and "dig around" in the settings a bit. Thanks to professional tools and measurements, we managed to correct the white balance, eliminating the excessive dominance of blue colour in both HD and 4K materials. This is a significant step forward, as in the Color Checker test, the colour reproduction errors in lower quality content dropped to a much more acceptable level. Unfortunately, the 4K materials still fall short of perfection – the colour inaccuracies are considerable and stem from the limitations of the television.
As for the gamma, we managed to set it at the correct level, which significantly reduced the excessive brightening of the image. However, the issue with brightness characteristics in 4K content remains unresolved – the EOTF curve still shows excessive brightness across the entire screen. It’s possible that correct implementation of dynamic tone mapping could help here, but as we mentioned earlier, this feature in the Hisense A7NQ works rather poorly, rather than being helpful. Nevertheless, the calibration has significantly improved the overall image reception. The director's vision is now much better represented than in the factory settings, which will certainly be appreciated by more demanding viewers.