[raverbashing]

It's interesting how the blog post think this is surprising, and how some basic techniques are rediscovered

The average filter is basically correlating the input signal with a (window sized) square wave

It's one of the most basic denoising techniques available (for AWGN)

[kortex]

"The moving average is the most common filter in DSP, mainly because it is the easiest digital filter to understand and use. In spite of its simplicity, the moving average filter is optimal for a common task: reducing random noise while retaining a sharp step response. This makes it the premier filter for time domain encoded signals. However, the moving average is the worst filter for frequency domain encoded signals, with little ability to separate one band of frequencies from another."

It definitely depends on your domain, but moving average/median can be extremely effective. (Or terrible, if mis-applied).

http://www.analog.com/media/en/technical-documentation/dsp-b...