Digital Noise Reduction on a TV - what is it

Modern TVs are significantly different from older models. Now it is not just a device for watching TV shows, but a full-fledged multimedia center with a large number of various functions and settings.

These include:

  • Screen resolution. This is one of the most important characteristics of TV receivers, which is responsible for the quality of the transmitted picture. The most common value is 1920x1080 HD, but there are models with Ultra HD 3840x2160 screen resolution.
  • Frame frequency. Affects the quality of movement of objects on the screen.
  • Smart tv. A feature that greatly enhances the capabilities of televisions. Due to the ability to access the Internet, the user gets access to a huge number of media files.

ATAll models also have a wide range of different settings.. These are image or audio quality settings that can be adjusted based on personal preferences. For example, digital noise reduction.

Digital Noise Reduction Assignment

Modern TV models allow you to watch videos from both external media and from Internet. As a rule, so that they do not take up too much space, and loading occurs faster, they are compressed to a small size. This leads to a deterioration in the quality of the transmitted picture and the appearance of so-called noise. Noises appear in the form of "snow", blurry image or grid. This is especially noticeable when viewing a digital signal.

REFERENCE. Noise reduction technology, DNR or its more modern versions of DNR 2D and DNR 3D helps to cope with this defect.

Types of noise

The most common are the following types of noise.

  • "Salt and pepper". They are called so because in the image they look like spots of white and gray.
  • Impulse. On the picture white spots present.
  • Gauss. Image is blurry and fuzzy.

Noise Reduction Methods

Television receivers use different methods of noise reduction.

DNR

Method based on temporal analysis of the video signal. She analyzes only those objects that are in close proximity to the camera.

REFERENCE. The technology mixes frames, due to which noise reduction occurs.

The background remains unchanged.

DNR 2D

Image analysis takes place in the spatial domain. However, the time direction is ignored.

This method has a significant drawback. Signal processing leads to the fact that the image loses its clarity.

DNR 3D

Method combines the comparison and mixing of frames and reduces spatial noise. This technology analyzes each frame and eliminates all existing artifacts and other defects. Due to this, the contrast and sharpness of the image increase. Moreover, each frame is processed several times.

REFERENCE. The technology allows you to process all the information about the picture, which gives it the opportunity to eliminate noise in both static and moving objects.

The DNR 3D method combines all the noise reduction methods DNR and DNR 2D and does not have their drawbacks.

How to set up digital noise reduction

To configure DNR, you must use the remote control to enter the image settings. Then make the following manipulations.

  • In the settings you need to find the DNR item and select "Noise Reduction" in it.
  • Use the up and down buttons on the remote control to select the desired value. For the picture to have optimal quality, it is advisable to set the lowest.

IMPORTANT! If the TV has the PC picture function or Game mode, the noise reduction setting function will not be available.

With the help of simple settings, you can eliminate the existing noise and get an image of excellent quality.

Watch the video: TV Noise Reduction Settings (March 2024).

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