Title :
Outlook for high quality 4 kb/s speech coding for cellular mobile
Author :
Mermelstein, Paul
Author_Institution :
Bell-Northern Res., Verdun, Que., Canada
Abstract :
The author presents a personal view on the outlook for 4-kb/s speech coding for cellular mobile systems in the next two-year time frame. When channel coding of roughly 2.4 kb/s is added to the 4 kb/s of speech information, the total 6.4-kb/s transmission rate will allow the speech signal in any conversation to use only one of six time-division multiple-access slots in any frame instead of the current two and thereby achieve a doubling in traffic capacity for each 30-kHz radio channel. Research directions are identified that have led to significant improvements in quality. These suggest that the quality equivalent to the TIA full-rate (8-kb/s) codec is achievable both for error-free and heavily Rayleigh-faded environments
Keywords :
cellular radio; channel capacity; speech coding; time division multiple access; 2.4 kbit/s; 30 kHz; 4 kbit/s; 6.4 kbit/s; TDMA; cellular mobile systems; error-free environments; heavily Rayleigh-faded environments; high quality speech coding; time-division multiple-access slots; traffic capacity; Business; Codecs; Decoding; Delay; Digital signal processing chips; Encoding; Linear predictive coding; Nonlinear filters; Speech coding; Speech processing;
Conference_Titel :
Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-87942-697-7
DOI :
10.1109/GLOCOM.1991.188685
