Bit Allocation based in parametric residual envelope for  adaptive predictive coders

All of RECERCAT

To access the full text documents, please follow this link: http://hdl.handle.net/2117/85865

Title:	Bit Allocation based in parametric residual envelope for adaptive predictive coders
Author:	Moreno Bilbao, M. Asunción
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
Abstract:	This work describes a coder that works at bit rates of 9.6Kbits/s to 32 Kb/ s. Basically the system consist on a waveform DPCM coder with an improvement in the quantizer. This new feature consist on quantizing the prediction error taking into account its waveform characteristics. The prediction residual of a voiced signal is characterized by an energy sychronous with pitch. The envelope of this signal holds this information and can be used to quantize properly the prediction error. In this work a parametric version of the residual envelope is used in two ways: Dynamic bit assignment in time domain and adaptive control of the dynamic range of the quantizer.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Wave equation -Equacions d'ona
Rights:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Conference Object
Share: