Variable-bit-rate speech transmission using punctured convolutional codes

Author

Atkin, Guillermo E. ; Tam, Chung-Chung

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA

Volume

40

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

443

Lastpage

446

Abstract

Rate (n-1)/n punctured convolutional codes are very effective in conjunction with embedded differential pulse code modulation (EDPCM) in variable-bit-rate speech transmission. The authors investigate the performance of this variable-bit-rate EDPCM system in terms of probability of bit error and audio signal-to-noise ratio (SNR) versus channel SNR in an additive white Gaussian noise and Rayleigh fading channel using soft-decision decoding for specific sets of code generators of punctured convolutional codes. The results show that different sets of code generators affect the performance in terms of both the probability of bit error and the audio SNR. Improvements were obtained in the cases of Gaussian nonfading and Rayleigh fading channels using soft-decision decoding

Keywords

decoding; encoding; error correction codes; pulse-code modulation; speech analysis and processing; voice communication; EDPCM; Gaussian nonfading channels; Rayleigh fading channel; additive white Gaussian noise; audio signal-to-noise ratio; bit error probability; channel SNR; embedded differential pulse code modulation; punctured convolutional codes; rate (n-1)/n codes; soft-decision decoding; variable-bit-rate speech transmission; Additive white noise; Convolution; Convolutional codes; Decoding; Fading; Modulation coding; Pulse modulation; Signal generators; Signal to noise ratio; Speech coding;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.124955

Filename

124955