# STFT Reconstruction After Modification

Why do we want to minimize the difference between the two signals the original one and the modified one when all we want is the modified constructed signal? What is the purpose of making it the minimization problem? Are we trying to save the phase information as the amplitude is anyway going to be updated if we are doing for example decibel conversion for some normalization method as follows?

Decibel Converted signal = $$10*log_{10}\frac{signal}{baseline}$$ in time-frequency domain.

What constraints should be applied while reconstructing a signal from the above-modified signal and why?