RWTH Aachen
University
Institute for Communication
Systems and Data Processing
Skip to content
Direkt zur Navigation
Home
Home

Publications – Details

Bandwidth Extension of Speech Signals: A Catalyst for the Introduction of Wideband Speech Coding?

Authors:
Peter Jax and Peter Vary
Journal:
IEEE Communications Magazine
Volume:
44
Number:
5
Date:
May 2006
Pages:
106–111
Language:
English

Abstract

The restricted audio quality of today’s telephone networks is mainly due to the narrowband (NB) limitation to the frequency range from

about 300 Hz to 3.4 kHz. Meanwhile, codecs for wideband (WB) telephony (50 Hz to 7 kHz) exist with significantly improved speech intelligibility and naturalness. However, the broad introduction of wideband speech coding will require strong efforts of both network operators and their customers because many elements of the

networks (i.e., terminals and network nodes) have to be modified. An intermediate step to overcome the narrowband limitation can be

achieved by applying artificial bandwidth extension (BWE) in the receiver. In this article we review the basic principles of bandwidth extension, and discuss several application scenarios in which both wideband coding and BWE complement each other. The introduction of BWE methods in terminals and networks may help to speed up the introduction of true wideband speech coding in the near future.

Download of Publication

Copyright Notice

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

The following notice applies to all IEEE publications:
© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

File

jax06b.pdf 358 K