DSPP Application on Audio Signal Separating

Patent Review : Signal Separating System

Link: https://patents.google.com/patent/US5835608A/en?q=audio&q=signal&q=separaitng

Summary:  The patent revolves around producing a system for separating signals such as intelligible sound, for example speech, from unwanted noise (background noise), such as random noise, when both of them are present in the same field. The system comprises of two transducers located within the field which both the sounds can pick up. Each transducer generates a representative output signal. The two transducers are in close proximity to each other. The intelligible sound is correlated. The noise is electronically attenuated.

IEEE Paper Review: An overview of informed audio signal separation

Link : http://ieeexplore.ieee.org/document/6616139/

Summary: Audio source separation consists in recovering different unknown signals called sources by filtering their observed mixtures. In music processing, most mixtures are stereophonic songs and the sources are the individual signals played by the instruments, e.g. bass, vocals, guitar, etc. Source separation is often achieved through a classical generalized Wiener filtering, which is controlled by parameters such as the power spectrograms and the spatial locations of the sources. 

For an efficient filtering, those parameters need to be available and their estimation is the main challenge faced by separation algorithms. In the blind scenario, only the mixtures are available and performance strongly depends on the mixtures considered.