Title :
Voice quality of interconnected PCS, Japanese cellular, and public switched telephone networks
Author :
Dimolitsas, Spiros ; Corcoran, Franklin L. ; Ravishankar, Channasandra ; Baraniecki, Marion
Author_Institution :
COMSAT Lab., Clarksburg, MD, USA
Abstract :
The non-linear nature of low-rate parametric speech coding has made it necessary to resort to formal subjective assessments for quantifying end-to-end voice quality of interconnected networks. At the same time, the rapid growth of cellular communications has highlighted the need to characterize transmission quality when cellular terminals are attached at the access or termination nodes of switched networks. In the paper the voice quality of interconnected North-American and Japanese digital cellular systems over public transmission facilities is quantified. From these assessments it is concluded that cellular networks using 8 kbit/s or 6.4 kbit/s VSELP may meet end-to-end quantization distortion criteria when interconnected with the switched network
Keywords :
cellular radio; digital radio; linear predictive coding; personal communication networks; speech coding; telephone networks; voice communication; 6.4 kbit/s; 8 kbit/s; Japanese cellular network; North-American cellular systems; PCS; end-to-end voice quality; interconnected networks; low-rate parametric speech coding; nonlinear nature; public switched telephone networks; public transmission facilities; quantization distortion criteria; subjective assessments; switched networks; transmission quality; Cellular networks; Code standards; GSM; Integrated circuit interconnections; Laboratories; Land mobile radio cellular systems; Personal communication networks; Phase change materials; Pulse modulation; Speech coding; Telephony;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-2431-5
DOI :
10.1109/ICASSP.1995.479526
