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Sinusoidal substitution - an integrated parametric tool for enhancement of transform-based perceptual audio coders

: Disch, Sascha; Schubert, Benjamin


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Signal Processing Society:
IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2014. Vol.9 : Florence, Italy, 4 - 9 May 2014
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-2894-1
ISBN: 978-1-4799-2892-7
ISBN: 978-1-4799-2893-4
International Conference on Acoustics, Speech and Signal Processing (ICASSP) <39, 2014, Florence>
Conference Paper
Fraunhofer IIS ()
semantic audio processing; Psychoakustik; Parametrische Audio Synthese; Audio-Synthese; Audio Analyse; Audio; Analyse; Zerlegung; Separation

Transform-based audio coders are the preferred technique for music data compression. However, at low bitrates, traditional coders based on Modified Discrete Cosine Transform are prone to strong warbling and roughness artifacts originating from sparsely coded tonal components. Parametric coders, in turn, suffer from an unpleasantly artificial sound and do not scale well up to perceptual transparency. Hybrid transform-based and parametric coding could potentially overcome the limits of the individual approaches. Yet, existing hybrid coders are hampered by the lack of integrative interplay between both techniques. We outline our ideas how to tightly integrate transform-based coding and parametric coding to obtain an enhanced perceptual quality and scalability. Also, we provide listening test results which demonstrate the benefits of our hybrid coder design.