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New Non-linear Inverse Quantization Algorithm and Hardware Architecture for Digital Audio Codecs  

Moon, Jong-Ha (LG전자 Digital TV 연구소)
Baek, Jae-Hyun (아주대학교 정보통신대학 전자공학부 SoC 연구실)
SunWoo, Myung-Hoon (아주대학교 정보통신대학 전자공학부 SoC 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.1C, 2008 , pp. 12-18 More about this Journal
Abstract
This paper This paper proposes a new inverse-quantization(IQ) table interpolation algorithm, specialized Digital Signal Processor(DSP) instructions and hardware architecture for digital audio codecs. Non-linear inverse quantization algorithm is representatively used in both MPEG-1 Layer-3 and MPEG-2/4 Advanced Audio Coding(AAC). The proposed instructions are optimized for the non-linear inverse quantization. The proposed algorithm can minimize operational complexity which reduces total computational load. Performance comparisons show a significant improvement of average error. The proposed instructions and hardware architecture can reduce 20% of the instruction counts and minimize computational loads of IQ algorithms effectively compared with existing IQ table interpolation algorithms. Proposed algorithm can implement commercial DSPs.
Keywords
Audio Coding; MP3; AAC; Inverse Quantization; ASIP; SoC;
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