Vector quantized multipulse-LPC

Both multipulse and stochastic coders render telephonic, or close to telephonic quality, for speech signals. Stochastic coders are more efficient from the point of view of bit rate and multipulse coders are the most efficient ones if we are looking for low computational cost. In this paper we study some possibilities of coding speech using the multipulse model but as efficiently as the stochastic coders does. Synthetic speech is generated from a multipulse sequence, obtained from a codebook, through a LPC syntesis filter. Then the model for speech signal is the multipulse model; it resembles the stochastic one in that the input sequence is obtained from a codebook but differs since it does not use pitch filter.