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A new Linear Predictive Echo Canceller (LPEC) is presented which modifies the classical echo canceller structure to pre-whiten the input signal and hence have better convergence properties in the presence of highly correlated input signals such as speech. This structure is integrated with a 16 KBPS Residual Excited Linear Predictive (RELP) Vocoder  to allow significant execution speed savings by sharing common processing modules. The integrated LPEC has been implemented in the Vocoder Demonstration System (VDS-20) using a single TMS32020 processor and will be available at the conference for demonstrations.
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86. (Volume:11 )
Date of Conference: Apr 1986