| Paper: | SPTM-P11.12 | ||
| Session: | Filter Banks and Subband Coding | ||
| Time: | Friday, May 21, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing Theory and Methods: Multi-rate Signal Processing & Wavelets | ||
| Title: | IMPROVED INTEGER TRANSFORMS USING MULTI-DIMENSIONAL LIFTING | ||
| Authors: | Ralf Geiger; Fraunhofer IIS | ||
| Yoshikazu Yokotani; University of Texas, Arlington | |||
| Gerald Schuller; Fraunhofer IIS | |||
| Jürgen Herre; Fraunhofer IIS | |||
| Abstract: | Recently lifting-based integer transforms have received much attention,especially in the area of lossless audio and image coding.The usual approach is to apply the lifting scheme to each Givens rotation.Especially in the case of long transform sizes in audio coding applications,this leads to a considerable approximation error in the frequency domain.This paper presents a multi-dimensional lifting approach for reducing thisapproximation error. In this approach, large parts of the transform arecalculated without rounding operations, only the output is rounded and added.The new approach is applied and evaluated for both theInteger Modified Discrete Cosine Transform (IntMDCT)and the Integer Fast Fourier Transform (IntFFT). | ||
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