1. Envelope and instantaneous phase considerations in speech modelling
- Author
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M.A. Lagunas, A. Moreno, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, and Universitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
- Subjects
Computer science ,speech ,Codebook ,Speech synthesis ,Filtering and prediction theory ,Filter (signal processing) ,Enginyeria de la telecomunicació [Àrees temàtiques de la UPC] ,Linear predictive coding ,Residual ,computer.software_genre ,Instantaneous phase ,Signal ,Parla ,Excited state ,Encoding ,Electronic engineering ,Envelope (mathematics) ,computer ,Algorithm ,Parametric statistics - Abstract
The authors present a low-bit-rate coding system where the envelope and instantaneous phase of the residual are used. A time-varying filter (short-delay filter) is excited by a signal composed by a parametric version of the residual, multiplied by a sequence from a codebook. Two alternatives are studied for the design of the codebook: sequences formed by random pulses and sequences formed by random phases to simulate the instantaneous phase of the residual
- Published
- 2003
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