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Simulation of an adaptive speech communications system applicable to time-varying, narrow-band channels

Thomas, Bryn and Honary, Bahram (1998) Simulation of an adaptive speech communications system applicable to time-varying, narrow-band channels. SIMULATION, 70 (5). pp. 291-303. ISSN 0037-5497

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Abstract

An adaptive speech and channel coding scheme is described, applicable to the communication of intelligible speech over very narrowband, noisy channels. A fixed- channel bit rate of 1200 bits per second (b/s) is assumed and the channel Eb/N o can drop below 3 decibels. A family of speech coders, derived from a parent coder operating at 1200 b/s, is described which, when combined with a variable rate (punctured) convolutional code, yields an adaptive system capable of operating over a range of channel conditions. The locations of the channel Eb /No threshold points between the various schemes were derived through simulation.

Item Type: Article
Journal or Publication Title: SIMULATION
Uncontrolled Keywords: Digital signal processing ; speech processing ; codec ; channel coder ; low bit-rate speech transmission
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 60763
Deposited By: ep_importer_pure
Deposited On: 03 Jan 2013 16:19
Refereed?: Yes
Published?: Published
Last Modified: 23 Oct 2017 03:17
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/60763

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