Article (Scientific journals)
DPCM with Forward Gain-Adaptive Quantizer and Simple Switched Predictor for High Quality Speech Signals
Despotovic, Vladimir; Peric, Zoran; Velimirovic, Zoran et al.
2010In Advances in Electrical and Computer Engineering, 10 (4), p. 95-98
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Keywords :
adaptive quantization; companding; correlation; speech processing; prediction
Abstract :
[en] In this article DPCM (Differential Pulse Code Modulation) speech coding scheme with a simple switched first order predictor is presented. Adaptation of the quantizer to the signal variance is performed for each particular frame. Each frame is classified as high or low correlated, based on the value of the correlation coefficient, then the selection of the appropriate predictor coefficient and bitrate is performed. Low correlated frames are encoded with a higher bitrate, while high correlated frames are encoded with a lower bitrate without the objectionable loss in quality. Theoretical model and experimental results are provided for the proposed algorithm.
Disciplines :
Computer science
Author, co-author :
Despotovic, Vladimir ;  University of Belgrade > Technical Faculty in Bor
Peric, Zoran;  University of Nis > Faculty of Electronic Engineering
Velimirovic, Zoran;  University of Nis > Faculty of Electronic Engineering
Delic, Vlado;  University of Novi Sad > Faculty of Technical Sciences
External co-authors :
yes
Language :
English
Title :
DPCM with Forward Gain-Adaptive Quantizer and Simple Switched Predictor for High Quality Speech Signals
Publication date :
November 2010
Journal title :
Advances in Electrical and Computer Engineering
ISSN :
1844-7600
Publisher :
Stefan cel Mare University of Suceava, Suceava, Romania
Volume :
10
Issue :
4
Pages :
95-98
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 10 December 2019

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