Two-dimensional prediction of area functions for coding of LPC speech parameters. - James D. Marr; Thomas P. Barnwell III (ICASSP, 1980)

Comparison of several clustering algorithms for data rate compression of LPC parameters. - James D. Marr (ICASSP, 1981)

Two dimensional prediction and interpolation for data rate compression of LPC parameters. - James D. Marr; Thomas P. Barnwell III (ICASSP, 1981)