Title :
Evaluation system for mobile radio speech codec
Author :
Miki, Toshio ; Suda, Hirohito
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
A multifunctional speech quality evaluation system has been developed to test the performance of mobile radio speech codecs. This system is characterized by a simple hardware configuration, a variety of software functions, and general interface specifications. Major degradation factors in mobile radio communications are taken into account, e.g., Rayleigh fading channel errors and background noise. The effects of PSTN, including transmission loss, noise, delay, and echo, are also considered. This evaluation system was used in the full-rate speech codec standardization for the Japanese digital cellular system in 1990
Keywords :
codecs; electronic equipment testing; mobile radio systems; speech analysis and processing; Japanese digital cellular system; PSTN; Rayleigh fading channel errors; background noise; degradation factors; delay; echo; full-rate speech codec standardization; general interface specifications; mobile radio speech codec; multifunctional speech quality evaluation; simple hardware configuration; software functions; transmission loss; Background noise; Degradation; Fading; Hardware; Land mobile radio; Mobile communication; Propagation losses; Speech analysis; Speech codecs; System testing;
Conference_Titel :
Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-87942-582-2
DOI :
10.1109/VETEC.1991.140575
