High quality MPEG-audio layer III algorithm for a 16-bit DSP

Author

Lee, Keun-Sup ; Oh, Hyen-O ; Park, Young-Cheol ; Youn, Dae Hee

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

2

fYear

2001

fDate

6-9 May 2001

Firstpage

205

Abstract

This paper presents a high quality MPEG-1/2 layer-III decoding algorithm, which is optimized for a 16-bit fixed-point arithmetic. Motorola DSP56600 16-bit DSP family processor is chosen as a target processor, and quantization noise due to fixed-point arithmetic is minimized for each decoding routine via C language-based fixed-point simulations. To maintain high audio quality with limited data precision, finite word length effects of each routine are evaluated. Also, double-precision arithmetic is tried for each routine and their effects are analyzed. Furthermore, to compromise the audio quality with the system complexity, the evaluation is extended to several fast algorithms for IMDCT and sub-band synthesis. To measure the quality of decoded output, ISO/IEC 13818-4 compliance test sequence is applied to the proposed algorithm. This test showed that the proposed decoding algorithms ensured full compliance with ISO/IEC 13818-3 audio decoder

Keywords

IEC standards; ISO standards; audio coding; computer architecture; decoding; digital signal processing chips; fixed point arithmetic; minimisation; 16-bit DSP; C language; IMDCT; ISO/IEC 13818-4 compliance test; MPEG-1/2 layer-III decoding algorithm; MPEG-audio layer III algorithm; Motorola DSP56600; data precision; decoding algorithms; double-precision arithmetic; finite word length effects; fixed-point arithmetic; fixed-point simulation; high audio quality; quantization noise; sub-band synthesis; target processor; Costs; Decoding; Digital signal processing; Fixed-point arithmetic; Hardware; Quantization; Reduced instruction set computing; Registers; Signal processing algorithms; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-6685-9

Type

conf

DOI

10.1109/ISCAS.2001.921043

Filename

921043