Combination of different perceptual models with different audio transform coding schemes

Implementation and evaluation

authored by

Armin Taghipour, Nicole Knölke, Jörn Ostermann, Bernd Edler

Abstract

In this paper four combinations of perceptual models and transform coding systems are implemented and compared. The first of the two perceptual models is based on a DFT with a uniform frequency resolution. The second model uses IIR filters designed in accordance with the temporal/spectral resolution of the auditory system. Both of the two transform coding systems use a uniform spectral decomposition (MDCT). While in the first system the quantizers are directly controlled by the perceptual model, the second system uses a preand post-filter with frequency warping for shaping the quantization noise with a temporal/spectral resolution more adapted to the auditory system. Implementation details are given and results of subjective tests are presented.

Organisation(s)

Institute of Information Processing

Type

Conference contribution

Volume

2

Pages

1171-1177

No. of pages

7

Publication date

2010

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Modelling and Simulation, Acoustics and Ultrasonics