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:
Journal Article
Journal or Publication Title:
SIMULATION
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qa75
Subjects:
ID Code:
60763
Deposited By:
Deposited On:
03 Jan 2013 16:19
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:15