Parametric AM/FM decomposition for speech and audio coding

Author

Bäckström, Tom ; Disch, Sascha

Author_Institution

Fraunhofer Inst. for Integrated Circuits (IIS), Erlangen, Germany

fYear

2009

fDate

18-21 Oct. 2009

Firstpage

333

Lastpage

336

Abstract

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.

Keywords

amplitude modulation; audio coding; frequency modulation; modulation coding; speech coding; transform coding; amplitude modulation; audio transform coding method; frequency modulation; locally-stationary signal normalization; parametric AM/FM decomposition method; signal variation modeling; voiced speech coding; Acoustic applications; Acoustic signal processing; Amplitude modulation; Audio coding; Conferences; Frequency modulation; Noise shaping; Speech coding; Speech processing; Transform coding; AM/FM decomposition; signal variation modeling; speech and audio coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Signal Processing to Audio and Acoustics, 2009. WASPAA '09. IEEE Workshop on

Conference_Location

New Paltz, NY

ISSN

1931-1168

Print_ISBN

978-1-4244-3678-1

Electronic_ISBN

1931-1168

Type

conf

DOI

10.1109/ASPAA.2009.5346529

Filename

5346529