T. Umayahara Haruhide Hokari Shoji Shimada Stereo width control using interpolation and extrapolation of time-frequency representation. 1364-1377 2006 14 IEEE Transactions on Audio, Speech & Language Processing 4 http://doi.ieeecomputersociety.org/10.1109/TASL.2006.872612 db/journals/taslp/taslp14.html#UmayaharaHS06