Embedded WI coding between 2.0 and 4.8 kbit/s

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


This paper describes an embedded speech coder based on waveform interpolation (WI) techniques. Since the quantization of line spectral frequency (LSF) parameters is fairly orthogonal to the quantization of excitation information, designing an embedded system with WI is much easier than that of other approaches. By using a hierarchical bit-allocation of excitation signals that consist of a slowly evolving waveform (SEW) and a rapidly evolving waveform (REW), the proposed system works well at the bit-rate of 2.0, 2.4, 3.0, 4.0 and 4.8 kbit/s. Listening tests indicate that the performance of the new system is comparable to an optimized fixed-rate WI coder, and the quality degrades gracefully as the bit-rate decreases.

Original languageEnglish
Title of host publication1999 IEEE Workshop on Speech Coding
Subtitle of host publicationModel, Coders, and Error Criteria, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages3
ISBN (Electronic)0780356519, 9780780356511
Publication statusPublished - 1999
Event6th IEEE Workshop on Speech Coding - Porvoo, Finland
Duration: 1999 Jun 201999 Jun 23

Publication series

Name1999 IEEE Workshop on Speech Coding: Model, Coders, and Error Criteria, Proceedings


Other6th IEEE Workshop on Speech Coding

Bibliographical note

Publisher Copyright:
© 1999 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Signal Processing


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