Analysis and optimization of speech coder algorithm for CDMA digital cellular

Author

Park, Jh Hyun ; Kim, Young Min

Author_Institution

Dept. of Electron. Eng., Chonnam Nat. Univ., Kwangju, South Korea

Volume

3

fYear

1994

fDate

14-18 Nov 1994

Firstpage

870

Abstract

CELP coding is a powerful technique for the realization of high-quality speech coders operating at variable bit rates. The paper describes an implementation of a QCELP coder algorithm for CDMA. In addition, a hardware implementation for improving the speech coding rate of QCELP speech coders is explored. The coder can operate at different bit rates by simply comparing the energy in the frame with the threshold which is based upon an estimate of the background noise level. This research is based upon the design of DSP chips and ASICs for dedicated digital mobile communication applications

Keywords

cellular radio; code division multiple access; digital radio; linear predictive coding; optimisation; speech coding; variable rate codes; vocoders; ASICs; CDMA digital cellular radio; CELP coding; DSP chips; QCELP coder algorithm; Qualcom CELP; background noise level; hardware implementation; high-quality speech coders; mobile communication applications; optimization; speech coder algorithm; speech coding rate; threshold; variable bit rates; Algorithm design and analysis; Background noise; Bit rate; Hardware; Multiaccess communication; Signal processing algorithms; Speech analysis; Speech codecs; Speech coding; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Singapore ICCS '94. Conference Proceedings.

Print_ISBN

0-7803-2046-8

Type

conf

DOI

10.1109/ICCS.1994.474281

Filename

474281