Outlook for high quality 4 kb/s speech coding for cellular mobile

Author

Mermelstein, Paul

Author_Institution

Bell-Northern Res., Verdun, Que., Canada

fYear

1991

fDate

2-5 Dec 1991

Firstpage

1865

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/GLOCOM.1991.188685

Filename

188685