Breaking the bounds:introducing informed spectral analysis

Informed Sound Analysis is a novel approach consisting in adding just missing data needed to otain a fixed level of quality for estimations.

Applications: Informed Sound Analysis combinated with Watermarking technique will make possible to create augmented content allowing high-quality sound application like effect application, music transcription or sound source separation.

In fallowing experiment, we consider a synthetic sound sampled at 44100Hz composed by 5 sinusoids with a time and spectral envelope of piano. Sound samples are frame-by-frame analyzed using reassignment method with Hann (size window N=511). Sinusoid frequencies are estimated first, then resynthetized with additional information. SNR per partial is computed before white noise addition in order to estimate required information per partial for each time. A blind reassignment estimation is available for listenning to make auditory comparison.