AN IMPROVED PROCEDURE FOR QoS MEASUREMENT IN TELECOMMUNICATION SYSTEMS
Domenico Grimaldi
Abstract:
The paper deals with (i) the characteristics of an improved signal-processing procedure for both voiced-unvoiced classification and echo parameter evaluation, and (ii) the reference signal selection to be adopted for clarity measurement. Improvements, respect to the traditional procedures, are achieved (i) in classifying the voice by means of the Learning Vector Quantization neural network, (ii) in echo parameter measurement by means of the recursive evaluation of the FIR filter coefficients estimating the impulse response of the echo path, and (iii) in the clarity measurement by using the optimized multi-sine signal. Numerical tests by using different types of telecommunication network noise show the efficacy of the proposed approach. The test results are also compared with the results obtained by different techniques presented in literature.
Keywords:
Quality of Service, Measurement in Telecommunication Systems, Signal Processing
