Separating a source in a stereo signal having a left channel and a right channel includes transforming the signal into a short-time transform domain; computing a short-time similarity measure between the left channel and the right channel; classifying portions of the signals having similar panning coefficients...http://www.google.de/patents/US7231060?utm_source=gb-gplus-sharePatent US7231060 - Systems and methods of generating control signals
