An output can be 4K while the source is HD
NVIDIA’s AI upscaling is a presentation process for lower-resolution content. A television receiving 4K output after that process does not prove the programme was recorded or supplied in native 4K.
Keep three labels separate: encoded source, processing choice and output mode. This avoids a sharper-looking result being used as evidence for a commercial source-resolution claim.
Compare without changing the source
Use NVIDIA’s documented demo or processing comparison with the same familiar item. Keep the TV’s own sharpness enhancement stable so the effect is not mixed with another processor.
Judge the presentation from ordinary viewing positions and material, not only a promotional still. Preference for one setting is useful household feedback, but it is not a measured recovery of original detail.
Retain model-specific limits
Check the exact SHIELD and installed software when a processing option is unavailable. NVIDIA’s release history contains a specific 2019 Pro 60 fps addition, so an old generic limitation should not be used as a universal rule.
When describing a result publicly, say the source was processed for the display where that is the case. Honest labels are more useful than turning every 4K HDMI signal into a native-4K claim.
Questions answered
Does a 4K TV input report identify the original source?
No. It reports the received output mode.
Can a preferred processing mode be called native source detail?
No. Keep the original recording and later enhancement distinct.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.