NR in the Xiaomi TV: decoding, working principle and finesse of settings

Have you ever noticed your Xiaomi menu? TV mystery-option NR (Or Noise Reduction) and wondered what it was responsible for? This acronym is often confusing - some users think it's connected to the network (New Radio in the Internet) 5G), Others assume a translation error. NR Xiaomi TVs are video processing technology that can both improve the picture and spoil it if used inappropriately.

In this article, we will analyze in detail what lies behind these two letters, how noise cancellation works in modern Mi. TV, Redmi Smart TV And other models of the brand, and why some owners specifically disable this feature. NR It is really useful, and when to keep it off – with examples from real use and expert recommendations.

What is it? NR Xiaomi TV: decryption and purpose

NR — In the context of Xiaomi TVs (and other brands), this technology is designed to reduce digital noise and artifacts in video that arise from the use of the video:

• 📶 Weak signal of air TV or satellite broadcasting
• 📼 Low bitrate in streaming video (YouTube, IPTV)
• 🎥 Video compression when recording or broadcasting
• 📺 Analogue sources (VHS, old-fashioned DVD)

Algorithms NR They analyze the frame and smooth out pixels that look like random noise, making the picture cleaner. But here's the catch: along with the noise, the system can blur out fine details (such as the texture of skin or the foliage in trees), making the image less natural.

In Xiaomi TVs, the function NR It usually runs at the MediaTek or Amlogic processor level (depending on the model) and can have multiple intensity modes: Off, Low, Medium, High. TV 4S/5X) The option is hidden in the menu Picture → Additional settings.

How noise reduction works in Xiaomi TVs: technical details

Technology NR Xiaomi TV based on a combination of two methods:

1. Spatial filtering is the analysis of neighboring pixels in one frame, and if a pixel is very different from the surroundings, the algorithm considers it noise and blurs it.
2. Time filtering is comparing the current frame to the previous one, and if an artifact appears and disappears chaotically (like noise), it is suppressed.

In models with a MediaTek processor MT9650 (Like Mi. TV 5 Pro) an improved algorithm is used AI Noise Reduction, which was trained on neural networks, is better at detecting noise without touching the details, but requires more computing resources. TV A Series) is a simplified version without AI.

It is important to understand that NR It only works with raw signal, and if you watch high-resolution video on Netflix or YouTube, noise cancellation can be redundant, because these platforms already use their own compression algorithms. DVD NR show up as much as possible.

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If you notice that when you are on NR The actors’ faces look like wax figures, try to reduce the intensity or turn off the function for the actors. HD-content.

Where to find the setting NR Xiaomi menu TV: step-by-step

Positioning of the option NR depends on the firmware version MIUI TV And the TV model, that's the universal path for most devices:

Open the Settings menu (cog on the remote)

Go to the Picture section (or Display in English firmware)

Select Additional Settings (or Advanced Settings)

Find the Noise Reduction item or NR

Set the desired level (off to high)-->

On some models (e.g., Mi) TV Stick or Mi Box) can be called Digital Noise Reduction and be in the Video Settings menu. NR In the list, update the firmware - in the old versions (up to the previous version). MIUI TV 3.0) the function may have been hidden.

For quick access to settings, you can use the voice assistant: tell the remote microphone Open the settings of the picture, and then find NR On Google TVs, manually. TV (for example, Xiaomi TV A Pro) the path will be different: Settings → Display and sound → Picture → Advanced settings.

When to include NR, When to turn off: practical advice

NR useful in the following cases:

• 📡 Watching TV on air (DVB-T2) at a weak signal - reduces "snow" and artifacts.
• 💿 Reproduction of the old DVD or VHS-records - removes graininess.
• 📱 Streaming video in low resolution (360p–480p) — block-smooth DCT.
• 🎮 Games with retro console (NES, SNES) through the emulator - reduces flickering.

NR It's better to turn it off if:

• 🎬 You watch movies in 4K HDR Bluray – Excess processing will worsen the detail.
• 🎮 You play modern games (PS5, Xbox Series X – Adds Delay (Input Lag).
• 📊 Working with graphs or text will blur small elements.
• 🎨 Watch anime or cartoons – distort artificial contours.

Professional screen calibrators (e.g. from RTINGS.com) recommend turning off NR For content with a bitrate higher than 10 Mbps. To check the bitrate, click on the Info (or Display) remote during playback – some Xiaomi models show the current signal parameters.

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For most users, Low or Medium is optimal, and High should only be used for highly noisy content (such as old ones). VHS-tape).

NR Input lag and delay: myths and reality

One of the most common fears is that NR It increases input lag (the delay between pressing a button and reacting on the screen). This is partly true, but depends on implementation:

• 🔹 Xiaomi. TV MediaTek-based MT9650 (Like Mi. TV Q1) switch-on NR form ~15-20 ms – critical only for eSports games.
• 🔹 On budget models (Redmi) TV A Series) lag can reach 30-40 ms, which is noticeable even in conventional games.
• 🔹 In Game Mode, noise reduction is automatically turned off or works in a simplified version.

If you play on Xiaomi TV, Check the delay with a testUFO:

1. Connect your PC or console to your TV.
2. Open the Input Lag test on the site.
3. Take a picture of the screen at high shutter speed (or use your smartphone camera in 60 mode). FPS).
4. Compare the position of the bands on the screen and the photo – the difference in pixels and will be lag.

To minimize delay:

• Turn it off. NR and Motion Smoothing.
• Activate Game Mode in the picture settings.
• Use the cable. HDMI 2.1 (for Mi) TV Q2 newer).

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If you play Fortnite or Call of Duty on Xiaomi TV, minimally NR It could cost you a win. Turn it off completely and check the difference!

NR Motion Smoothing: What’s the difference and can you use it together?

Many people confuse NR (Noise Reduction with Motion Smoothing (or) MEMMC — Motion Estimation/Motion Compensation. These are two different technologies:

Use it. NR Motion Smoothing is possible at the same time, but it is fraught with danger:

• ⚠️ Double video processing → further delay.
• ⚠️ Distortion of the image (for example, “ghost” contours around objects).
• ⚠️ Processor overload → possible inhibition.

Experts recommend that you include only one of the technologies, depending on the content:

• 🎥 Movies (24) FPS): NR On Low, Motion Smoothing - Off.
• ⚽ Sport (60) FPS): NR — Motion Smoothing – Motion Smoothing – Medium
• 🎮 Games: both functions - Off.

Problems with NR Xiaomi TV And how to solve them.

Despite the utility, NR It sometimes fails. Here are the typical problems and their solutions:

⚠️ Attention: If, after activation, NR The screen starts to blink or colored artifacts appear, this is a sign of a malfunction of the video processor. Immediately turn off the function and check the TV for overheating (feel the back panel - if hot, let cool for 30 minutes).

Problem 1: NR doesn't work

• 🔹 Make sure the function is supported by your model (see table above).
• 🔹 Check the source of the signal — NR not applicable HDMI mode PC or Game mode.
• 🔹 Update the firmware: Settings → System system → Update of the PO.

Problem 2: The picture becomes too blurry

• 🔹 Lower the level. NR Up to Low or Disable for High Quality Content.
• 🔹 Check the Sharpness settings – at high NR It's better to reduce it to 30-40%.
• 🔹 If you are looking through the Kodi or IPTV-Player, turn off the built-in noise reduction in the application itself.

Problem 3: NR turn on

• 🔹 Reset the picture settings: Settings → Picture → Reset.
• 🔹 Turn off the Adaptive Picture or AI-Optimization (if any).
• 🔹 Check the remote for sticking buttons – sometimes accidentally pressing changes the settings.

If problems persist, try resetting the TV to factory settings (Settings) → System system → Reset to factory), but note that it will delete all saved apps and accounts.

FAQ: Frequent questions about NR on Xiaomi TVs