Title :
Wordlength optimization of an MPEG-2 audio decoder
Author :
Jeong, Man-Seop ; Kim, Seehyun ; Sohn, Jongseo ; Sung, Wonyong
Author_Institution :
ASIC Center, Samsung Electron. Co., South Korea
Abstract :
A set of internal wordlengths for implementing an MPEG-2 audio decoder has been determined to minimize the hardware cost while limiting the fixed-point noise to be below the perceptual masking curve. The hardware architecture is based on a data path containing a multiplier and an adder. The finite wordlength effects of three DCT algorithms for the efficient implementation of the subband filtering are also compared. For the bit-accurate fixed-point simulation, the fixed-point optimization utility, which has been developed for the rapid evaluation of finite wordlength effects, is used
Keywords :
audio coding; audio signals; data compression; decoding; digital arithmetic; discrete cosine transforms; optimisation; pulse code modulation; DCT algorithms; MPEG-2 audio decoder; PCM; finite wordlength effects; fixed-point noise; fixed-point optimization utility; hardware architecture; subband filtering; wordlength optimization; Application specific integrated circuits; Costs; Decoding; Filtering; Filters; Hardware; Phase change materials; Quantization; Streaming media; Transform coding;
Conference_Titel :
Circuits and Systems, 1996., IEEE Asia Pacific Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-3702-6
DOI :
10.1109/APCAS.1996.569228
