Structural issues in cascade-form adaptive IIR filters. - Geoffrey A. Williamson; James P. Ashley; Majid Nayeri (ICASSP, 1995)

Low complexity joint optimization of excitation parameters in analysis-by-synthesis speech coding. - Udar Mittal; James P. Ashley; Edgardo M. Cruz-Zeno (INTERSPEECH, 2003)

A Technique of Multi-Tap Long Term Predictor (LTP) Filter Using Sub-Sample Resolution Delay. - Mark A. Jasiuk; Tenkasi Ramabadran; Udar Mittal; James P. Ashley; Michael J. McLaughlin (ICASSP (1), 2005)

Joint Optimization of Excitation Parameters in Analysis-By-Synthesis Speech Coders Having Multi-Tap Long Term Predictor. - Udar Mittal; James P. Ashley; Edgardo M. Cruz-Zeno; Mark A. Jasiuk (ICASSP (1), 2005)

Closed Loop Dynamic Bit Allocation for Excitation Parameters in Analysis-by-Synthesis Speech Codec. - James P. Ashley; Udar Mittal (ICASSP (4), 2007)

Low Complexity Factorial Pulse Coding of MDCT Coefficients using Approximation of Combinatorial Functions. - Udar Mittal; James P. Ashley; Edgardo M. Cruz-Zeno (ICASSP (1), 2007)

Higher layer coding of non-speech like signals using factorial pulse codebook. - Udar Mittal; James P. Ashley; Jonathan Gibbs (INTERSPEECH, 2008)