Generalization of the multipulse coding for low bit rate coding purposes: The generalized decimation
J.-P. Adoul, F. Didelot, P. Mabilleau, S. Morissette · 2005
This paper shows a technique of encoding the LPC residual which allows the achievement of speech coding with residual excitation at a bit rate as low as 2400 bps. The method is inspired by the multipulse coding approach introduced by Atal, associated with an irregular downsampl-ing. The real time implementation of a 4800 bps vocoder on a single TMS 320 DSP is discussed.