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VLSI Design ofResource Shared Complex-QMF Bank for HE-AAC Decoder


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Abstract


A VLSI design of complex Quadrature Mirror Filterbank (QMF) for MPEG-4 High Efficiency Advanced Audio Coding (MPEG-4 HE-AAC) decoder using resourcesharing technique is proposed. The algorithm that uses conventional discrete cosine transform oftype 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 ofthe proposed algorithm can save about 53% of area and 50% memory due to the shared resources ofDCT-IV

KeyWords
MPEG 4 HE AAC, Resource sharing, Complex QMF, VLSI,neT IV



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