Pretty simple question - I am trying to figure out what exactly is different between 'de-noising' a signal, and simply filtering it (as we commonly know) to remove noise. Is this a case of lexical overlap or is there something fundamentally different? Why is it called 'de-noising'?
Edit: Perhaps crucially, when we talk of filtering a signal to maximize its SNR, we usually mean AWGN in the colloquial context. So is the 'noise' being referred to in de-noising also AWGN, and if so, is de-noising simply a different way of removing it, or is it a different type of noise (non-gaussian, colored, etc) to begin with?