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2006 IEEE International Conference on Multimedia and Expo   pp. 901-904
Efficient Partial Spectrum Reconstruction using an Asymmetric PQMF Algorithm for MPEG-Coded Stereo Audio
Wendong Huang, School of Computing, National University of Singapore, 3 Science Drive, Singapore 117543. Huangwd@comp.nus.edu.sg
Ye Wang, School of Computing, National University of Singapore, 3 Science Drive, Singapore 117543. wangye@comp.nus.edu.sg

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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICME.2006.262665
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Abstract
This paper presents a novel algorithm of a scalable and efficient Pseudo-Quadrature Mirror Filters (PQMF), which is employed for partial decoding a single-layer audio bitstream such as MP3, typically coded in joint/MS mode. The proposed algorithm is a new extension to our previous work on scalable audio decoding and is designed for asymmetric partial spectrum reconstruction (APSR), where perceptually irrelevant computations are removed. Furthermore, an efficient up-sampling operation is introduced for right channel output. The slight distortions introduced by our simple up-sampling method are inaudible according to a set of perceptual evaluations. Simulation results show that 64.6% energy savings can be achieved for a typical configuration in comparison to the standard PQMF algorithm employed by MPEG-1 audio.
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Citation:  Wendong Huang, Ye Wang, "Efficient Partial Spectrum Reconstruction using an Asymmetric PQMF Algorithm for MPEG-Coded Stereo Audio," icme, pp. 901-904,  2006 IEEE International Conference on Multimedia and Expo,  2006