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

fYear

1996

fDate

18-21 Nov 1996

Firstpage

97

Lastpage

100

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996., IEEE Asia Pacific Conference on

Conference_Location

Seoul

Print_ISBN

0-7803-3702-6

Type

conf

DOI

10.1109/APCAS.1996.569228

Filename

569228