Pulse-by-pulse reoptimization of the synthesis filter in pulse-based coders

Abstract

In this study, two iterative algorithms for pulse-based linear predictive (PB-LP) analysis are developed. At kth step, one of the algorithms assumes that the pulse locations of k pulses are known and calculates the LP coefficients jointly with k pulse amplitudes, in contrast, the other algorithm assumes that the previous k - 1 pulse amplitudes are known and jointly estimates the LP filter coefficients and the kth pulse amplitude. These algorithms are proposed for synthesis filter reoptimization in pulse-based LP coders, and their effectiveness in multipulse coding is demonstrated through several simulations.