P. Patrick

Adaptive frequency mapping of speech signals

C. Xydeas, R. Steele, P. Patrick, 1983 .

Voiced/unvoiced band-switching system for transmission of 6 kHz speech over 3.4 kHz telephone channels

R. Steele, P. Patrick, C. Xydeas, 1981 .

Frequency Compression of 7.6 kHz Speech Into 3.3 kHz Bandwidth

C. Xydeas, R. Steele, P. Patrick, 1983, IEEE Trans. Commun..