Title
Design of scalar compandor for medium bit rate using spline approximations
Creator
Velimirović, Lazar Z. 1983-
Copyright date
2012
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 26.04.2013.
Other responsibilities
mentor
Perić, Zoran 1964-
član komisije
Stefanović, Mihajlo
član komisije
Đurović, Željko 1964-
član komisije
Stanković, Miomir 1949-
član komisije
Jovanović, Aleksandra
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Nišu
Faculty
Elektronski fakultet
Group
Katedra za telekomunikacije
Alternative title
Projektovanje skalarnih kompandora za srednje brzine korišćenjem splajn aproksimacija
Publisher
[L. Z. Velimirović]
Format
128 listova
description
Biografija: 128.
Abstract (en)
In this doctoral thesis, firstly the general characteristics of the signal and scalar
quantizers, as well as the procedure of signal discretization, are described, and then the
model of scalar compandor is shown. By linearization and approximation of the optimal
compressor function, the simplification of the compandor model is done toward its
simpler realization.
The validity of compandor design based on linearized compressor function and
approximative spline functions of the first and second order is confirmed in this thesis.
Using spline functions, the optimal compressor function can be well approximated.
Therefore, in this PhD thesis, special attention is paid to scalar compandor design by
using first and second order spline functions.
A detailed analysis of the proposed compandor models for the input signals
modelled by Laplacian and Gaussian probability density function is done. Also, it is
shown that by the proposed quantizer model, signal quality that is very close to signal
quality of the optimal companding quantizer, is achieved.
The analysis of the proposed compandor model allows designers to gain complete
insight on the compandor technique significance, the support region, the number of
segments, the number of quantization levels and the types of the input signals on the
compandor performances, and also to design the optimal compandor model for the
desired parameters.
Authors Key words
skalarni kompandor, kompresorska funkcija, linearizacija, skalarna
kvantizacija, optimizacija amplitudskog opsega kompandora, splajn aproksimacije,
prošireno Hafmanovo kodovanje
Classification
621.391(043.3)
Type
Elektronska teza
Abstract (en)
In this doctoral thesis, firstly the general characteristics of the signal and scalar
quantizers, as well as the procedure of signal discretization, are described, and then the
model of scalar compandor is shown. By linearization and approximation of the optimal
compressor function, the simplification of the compandor model is done toward its
simpler realization.
The validity of compandor design based on linearized compressor function and
approximative spline functions of the first and second order is confirmed in this thesis.
Using spline functions, the optimal compressor function can be well approximated.
Therefore, in this PhD thesis, special attention is paid to scalar compandor design by
using first and second order spline functions.
A detailed analysis of the proposed compandor models for the input signals
modelled by Laplacian and Gaussian probability density function is done. Also, it is
shown that by the proposed quantizer model, signal quality that is very close to signal
quality of the optimal companding quantizer, is achieved.
The analysis of the proposed compandor model allows designers to gain complete
insight on the compandor technique significance, the support region, the number of
segments, the number of quantization levels and the types of the input signals on the
compandor performances, and also to design the optimal compandor model for the
desired parameters.
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