DPCM system design for diversity systems with applications to packetized speech

Author

Ingle, Ajay ; Vaishampayan, Vinay A.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

3

Issue

1

fYear

1995

fDate

1/1/1995 12:00:00 AM

Firstpage

48

Lastpage

58

Abstract

Speech quality in packetized speech systems can degrade substantially when packets are lost. We consider the problem of DPCM system design for packetized speech systems. The problem is formulated as a multiple description problem and the problem of optimal selection of the encoder and decoder filters is addressed. We show that significant improvements in performance are obtained as compared to an earlier system proposed by Jayant and Christensen (1981). Further, we show that for a first-order Gauss-Markov source significant performance improvements can be obtained by using a second-order predictor instead of a first-order predictor

Keywords

Markov processes; differential pulse code modulation; diversity reception; filtering theory; land mobile radio; packet switching; speech coding; speech intelligibility; voice communication; DPCM system design; decoder filters; diversity systems; encoder filters; first-order Gauss-Markov source; optimal selection; packet switched network; packetized speech; performance; second-order predictor; speech coding; speech quality; wireless mobile systems; Buffer overflow; Decoding; Degradation; Fading; Filters; Gaussian processes; Loss measurement; Propagation losses; Source coding; Speech;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.365381

Filename

365381