TrekStor Tv streamer User Manual page 29

4. A/V Settings
Dynamic Noise Reduction(DNR)
This is an audio noise reduction system used to automatically reduce background noise.
HDMI Chroma Sub-sampling Set
This feature chooses an encoding for images and videos via HDMI
Your video will be upsampled to 4:4:4.
※In a few cases, some TVs won't be able to support 4:4:4 upsampling, therefore it
4:4:4
can bring screen noise problem.
4:2:2 4:2:2: is a general format and was widely used before 4:4:4 type was introduced
Settings