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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/13785

Title: Wideband (0-7kHz) speech coding techniques
Authors: Koh, Soo N.
Issue Date: 1984
Publisher: © Soo Ngee Koh
Abstract: With the existing telephone networks evolving towards Integrated Services Digital Networks, there is a specific need to transmit high quality wideband (0-7 kHz) speech at 64 kbps or below for special services like voice channels in teleconferencing, commentary channels for broadcasting etc. In this thesis, a computer simulation study of digital coding of wideband speech at 64 kbps using relatively simple coding techniques is first presented. The performance of ADPCM coders employing fixed or adaptive prediction, with or without noise spectral shaping, and 2-band subband coders is examined under ideal as well as noisy channel conditions. While preserving the quality of the 64 kbps recovered speech, the transmission bit rate is reduced to 56 kbps so that 8 kbps data can be accommodated within 64 kbps channel....cont'd.
Description: A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.
URI: https://dspace.lboro.ac.uk/2134/13785
Appears in Collections:PhD Theses (Mechanical, Electrical and Manufacturing Engineering)

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