Methods and systems for accurate as well as estimated evaluation of quality of speech signals transcoding in inter-network telecommunications link

• Published in: Measurement : journal of the International Measurement Confederation 2002-09, Vol.32 (2), p.93-107
• Main Authors: Badzmirowski, Krzysztof, Łopatka, Jerzy, Szafraniec, Piotr, Turczyński, Janusz, Zagoździński, Lech
• Format: Article
• Language: English
• Subjects: Applied sciences; Computer interfaces; Computers in experimental physics; Exact sciences and technology; Information, signal and communications theory; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Inter-network telecommunications; ISDN network; Physics; Signal processing; Speech communication systems and speech performance; Speech processing; Speech signals; Telecommunications and information theory
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/S0263-2241(00)00062-2

Co-operation of different communications networks requires implementing specialized interfaces that make possible exchanging user’s information as well as control information. For that reason estimating information processing quality of a given interface is an important issue. The publication presents methodology for estimating quality of processing user’s information. User’s information is in a speech signal form. The methodology has been used for assessing interface between ISDN network and special network. Two methods have been employed – the (objective) method for automatic, though approximate, assessment, and the accurate method using intelligibility tests. The publication discusses the speech signal processing principle for the inter-network interface, measuring methods and systems as well as results of transcoding quality assessment for the developed interface. The above-mentioned research topics have been solved within the framework of the grant (No. 8 T11B 056 11) financed by the State Committee for Scientific Research.