Fourth European Conference on Speech Communication and Technology

Madrid, Spain
September 18-21, 1995

Very Fast CELP Coding using Stochastic Innovations

Silvio Cucchi, Marco Fratti

Corporate Research Centre, Alcatel Telettra,Vimercate (MI), Italy

In this paper, we describe improvements to the CELP excitation model for speech coding at medium-low bit rates. The innovation signal in our coder is modeled by addition/subtraction of two codewords derived from the same stochastic codebook. An extremely efficient pre-selection procedure allows to choose the 'best' candidate codewords. The best couple of codewords is then selected among the pre-selected ones. The proposed method is amenable to the implementation of low complexity CELP coders based on stochastic excitation.

Full Paper

Bibliographic reference.  Cucchi, Silvio / Fratti, Marco (1995): "Very fast CELP coding using stochastic innovations", In EUROSPEECH-1995, 715-718.