Method and device for underdetermined sound signal separation based on Hilbert converting

The invention discloses a method and a device for underdetermined sound signal separation based on Hilbert converting, and belongs to the technical field of underdetermined blind signal processing. The method comprises a step 1 of carrying out denoising preprocessing on collected mixed sound signals; a step 2 of carrying out Hilbert converting on the sound signals preprocessed in step 1; a step 3 of carrying out differential processing on the signals converted in step 2, synthesizing the signals obtained by differential processing and the collected sound signals, forming underdetermined sound signals; a step 4 of determining the number of source sound signals according to the obtained underdetermined sound signals; a step 5 of converting the underdetermined sound signals to well-posed signals according to the number of the source sound signals; and a step 6 of carrying out independent component analysis on the obtained well-posed signals. According to the method, the underdetermined blind sound signals can be