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VLSI design of resource shared complex-QMF bank for HE-AAC decoder

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6 Author(s)
Junqiao Huang ; VLSI Res. Inst., Hefei Univ. of Technol., Hefei, China ; Gaoming Du ; Duoli Zhang ; Yukun Song
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A VLSI design of complex Quadrature Mirror Filterbank (QMF) for MPEG-4 High Efficiency Advanced Audio Coding (MPEG-4 HE-AAC) decoder using resource-sharing technique is proposed. The algorithm that uses conventional discrete cosine transform of type IV(DCT-IV) to optimize complex-QMF is derived in this paper. By using the proposed algorithm, the VLSI design of complex valued analysis quadrature mirror filterbank (complex-AQMF) and synthesis quadrature mirror filterbank (complex-SQMF) can improve resource efficiently by sharing the same DCT module. Experiment results show that the computational complexity of the complex-QMF can be reduced up to 8.59%, the VLSI architecture of the proposed algorithm can save about 53% of area and 50% memory due to the shared resources of DCT-IV.

Published in:

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Date of Conference:

20-23 Oct. 2009