Many companies tie these efforts to another technology, called judder reduction, which is often referred to as motion smoothing.
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It goes by a number of names, including Auto Motion Plus (Samsung), Motionflow (Sony), and TruMotion (LG). TV manufacturers use various technologies to reduce motion blur, including repeating frames or inserting black frames into the video signal.
One issue with LCD-based TVs, in particular, is that the image can blur during fast-moving scenes, such as in action movies or sports. Turn off noise reduction and you'll have more picture detail and a more natural-looking image.
The problem with engaging noise reduction is that it comes at the expense of detail and fine texture-these tend to get smoothed over when the feature is active. And, yes, when TVs upconvert video signals from low-quality sources you may still see some noise.īut for the most part, you're getting much cleaner, higher-quality digital source content these days, whether you're using over-the-air digital broadcasts, high-def signals from cable and satellite TV services, streaming service signals, or pristine video from Blu-ray discs.
Noise-sometimes called "snow" due to the appearance of black and white dots in the picture-was a bigger issue with older analog TVs, and especially with lower-definition analog signals. "Hey," you might argue, "why do I want to turn off noise reduction? I don't want to see any noise on my TV!" That would seem to make sense, except it doesn't.