Variable Rate Speech Coding

  • Vladimir Cuperman
  • Peter Lupini
Part of the The Springer International Series in Engineering and Computer Science book series (SECS, volume 327)


An important goal in the design of voice communication networks and storage systems is to maximize capacity while maintaining an acceptable level of voice quality. Conventional speech coding systems use a fixed bit rate regardless of factors such as local speech statistics, transmission channel conditions, or network load. One method of maximizing capacity while maintaining an acceptable level of speech quality is to allow the bit rate to vary as a function of these factors. Variable rate speech coders exploit two important characteristics of speech communications: the large percentage of silence during conversations, and the large local changes in the minimal rate required to achieve a given speech reproduction quality.


Code Division Multiple Access Mean Opinion Score Asynchronous Transfer Mode Time Division Multiple Access Pulse Code Modulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Vladimir Cuperman
    • 1
  • Peter Lupini
    • 2
  1. 1.School of Engineering ScienceSimon Fraser UniversityBurnabyCanada
  2. 2.School of Engineering ScienceSimon Fraser UniversityBurnabyCanada

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