Spectral Envelope and Perceptual Masking Models

  • Tom BäckströmEmail author
Part of the Signals and Communication Technology book series (SCT)


Envelope models describe the gross shape of a signal, such as the magnitude spectrum of a speech signal. An envelope model of the spectrum is thus a source model of the speech signal. Perceptual (frequency) masking models are evaluation models, which describe the magnitude of the perceptually detrimental effect of errors in different parts of the spectrum. The two models tend to have similar shapes, whereby they are described jointly in this chapter. In CELP-type codecs, envelope models are usually based on linear prediction, whereby that will be the main theme of this chapter.


Speech Signal Linear Prediction Vocal Tract Tube Model Spectral Envelope 
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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.International Audio Laboratories Erlangen (AudioLabs)Friedrich-Alexander University Erlangen-Nürnberg (FAU)ErlangenGermany

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