Overcomplete source expansion aided, soft-bit assisted speech transceiver

Nurul Farahin Bt Tajul Arifin, Noor Shamsiah Othman, Ahmed Mohammed Ahmed

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a scheme that invokes jointly optimized source and channel decoding, which exploits the redundancy imposed by the overcomplete expansion scheme. More explicitly, a structured redundancy based on discrete Fourier transform (DFT) is inserted to the speech signal prior to source encoding. At the receiver the soft-input soft-output (SISO) decoder exploits the source index correlation for error protection. Furthermore, the explicit redundancy introduced in the speech signal is exploited to reconstruct the received voice signal with the aid of pseudo-inverse of the overcomplete block transform. The performance of the proposed scheme is evaluated when communicating over Additive White Gaussian Noise (AWGN) channel. The specific scheme using an overall code rate of 1/2 benefitted from the exploitation of the residual redundancy with about 0.4 dB Eb/N0 gain to its corresponding hard speech decoding based counterpart.

Original languageEnglish
Title of host publicationISTT 2014 - 2014 IEEE 2nd International Symposium on Telecommunication Technologies
EditorsMahamod Ismail, Nordin Ramli
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages326-329
Number of pages4
ISBN (Electronic)9781479959822
DOIs
Publication statusPublished - 02 Sep 2015
Event2nd IEEE International Symposium on Telecommunication Technologies, ISTT 2014 - Langkawi, Malaysia
Duration: 24 Nov 201426 Nov 2014

Publication series

NameISTT 2014 - 2014 IEEE 2nd International Symposium on Telecommunication Technologies

Other

Other2nd IEEE International Symposium on Telecommunication Technologies, ISTT 2014
CountryMalaysia
CityLangkawi
Period24/11/1426/11/14

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All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

Cite this

Arifin, N. F. B. T., Othman, N. S., & Ahmed, A. M. (2015). Overcomplete source expansion aided, soft-bit assisted speech transceiver. In M. Ismail, & N. Ramli (Eds.), ISTT 2014 - 2014 IEEE 2nd International Symposium on Telecommunication Technologies (pp. 326-329). [7238229] (ISTT 2014 - 2014 IEEE 2nd International Symposium on Telecommunication Technologies). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISTT.2014.7238229