Efficient bit allocation algorithm for ISO/MPEG audio encoder

Author

Teh, Do-Hui ; Koh, Soo-Ngee ; Tan, Ah-Peng

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

34

Issue

8

fYear

1998

fDate

4/16/1998 12:00:00 AM

Firstpage

721

Lastpage

722

Abstract

An efficient bit allocation algorithm for the ISO/MPEG audio layer 2 encoder is proposed. The resulting encoder is able to produce an ISO/MPEG compliant bit stream which is almost identical to the bit stream produced by the reference ISO/MPEG encoder suggested in IS 11172-3. More importantly, the number of computational steps is greatly reduced as compared to the method recommended by the ISO/MPEG Committee because the efficient bit allocation algorithm significantly reduces the number of iterations required. It was found that the efficient bit allocation algorithm works best when the bit rate demanded by the psychoacoustic model in order to keep the quantisation noise below the masking threshold is almost equal to the operational bit rate

Keywords

ISO standards; audio coding; data compression; quantisation (signal); telecommunication standards; 96 kbit/s; ISO/MPEG audio encoder; ISO/MPEG compliant bit stream; bit allocation algorithm; computational steps reduction; masking threshold; operational bit rate; psychoacoustic model; quantisation noise;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19980540

Filename

674877