Voiced/Unvoiced classification of speech with applications to the U.S. government LPC-10E algorithm. - Joseph P. Campbell Jr.; Thomas E. Tremain (ICASSP, 1986)

A TMs32020-based real time, text-independent, automatic speaker verification system. - Joseph B. Attili; Michael Savic; Joseph P. Campbell Jr. (ICASSP, 1988)

An expandable error-protected 4800 bps CELP coder (US Federal Standard 4800 bps voice coder). - Joseph P. Campbell Jr.; Vanoy C. Welch; Thomas E. Tremain (ICASSP, 1989)

CELP coding for land mobile radio applications. - Douglas J. Rahikka; Thomas E. Tremain; Vanoy C. Welch; Joseph P. Campbell Jr. (ICASSP, 1990)

The federal standard 1016 4800 bps CELP voice coder. - Joseph P. Campbell Jr.; Thomas E. Tremain; Vanoy C. Welch (Digit. Signal Process., 1991)