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Efficient DSP Architecture For High- Quality Audio Algorithms  

Moon, Jong-Ha (System ASIC Technology Group, Digital TV Laboratory LG Electronics Inc.)
SunWoo, Myung-Hoon (Department of Electrical Engineering, Ajou University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.44, no.5, 2007 , pp. 112-117 More about this Journal
Abstract
This paper presents specialized DSP instructions and their hardware architecture for audio coding algorithms, such as the MPEG-2/4 Advanced Audio Coding(AAC), Dolby AC-3, MPEG-2 Backward Compatible(BC), etc. The proposed architecture is specially designed and optimized for the MDCT/IMDCT(Inverse Modified Discrete Cosine Transform), and Huffman decoding of the AAC decoding algorithm. Performance comparisons show a significant improvement compared with TMS320C62x and ASDSP21060 for the MDCT/IMDCT computation. In addition, the dedicated Huffman decoding accelerator performs decoding and preparing operand in only one cycle. The proposed DPU(Data Processing Unit) consists of 107,860 gates and achieves 150 MIPS.
Keywords
AAC; AC-3; MPEG-2; MDCT; DSP;
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