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Parametric AM/FM decomposition for speech and audio coding

: Bäckström, T.; Disch, S.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009. Proceedings : 18-21 Oct. 2009, New Paltz, NY
Piscataway/NJ: IEEE, 2009
ISBN: 978-1-4244-3678-1
ISBN: 978-1-4244-3679-8
Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) <2009, New Paltz/NY>
Conference Paper
Fraunhofer IIS ()

Audio transform coding methods generally employ an assumption of locally stationary signals. However, as demands on coding efficiency increase, the assumption of stationarity becomes increasingly challenging. In this article we study a parametric method for modeling variability in an audio signal, especially with voiced speech in mind. Namely, we model modulation in fundamental frequency and amplitude, with the objective of allowing normalization of the signal to satisfy the stationarity requirements of transform based coders. ©2009 IEEE.