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An investigation into the scale codec system and the design of A-law PCM-to-scale and scale-to-A-law PCM converters

thesis
posted on 17.10.2018 by Mustafa M. Nwessry
The type of digital coding which has been internationally approved for telephone interexchange transmission is logarithmically-companded Pulse Code Modulation, known as A-law PCM. Delta and delta-sigma modulation with digitally controlled syllabic companding are preferred in military applications and are increasingly used in the local subscriber networks. At the moment the users of these systems are unable to communicate directly with each other. The prime objective of this study is to design digital converters to translate the codes from a syllabically companded mnd logically encoded delta-sigma modulation system, known as SCALE, to A-law PCM codes and vice versa. [Continues.]

Funding

Arabian Gulf Oil Company (Libya).

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Publisher

© M.M. Nwessry

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1976

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.

Language

en

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