A low bit-rate audio coder based on modified sinusoidal model

Author

Shaopeng, Song ; Junxun, Yin ; Yongcong, Yu ; Raed, AI-Moussawy

Author_Institution

Dept. of Electron. Eng., South China Univ. of Technol., Guangzhou, China

Volume

1

fYear

2002

fDate

29 June-1 July 2002

Firstpage

648

Abstract

A very low bit-rate audio coding algorithm suitable for wireless mobile communications is presented. The codec is based on a sinusoidal model, with modifications to reduce bit-rate and improve reconstructed audio quality. The improvements include signal adaptive analysis length, psychoacoustic model used in both matching pursuits algorithm and parameter quantization, and phaseless frequency domain audio reconstruction. At general bit-rate of 0.5 bit per sample, AM broadcasting audio quality is achieved.

Keywords

adaptive signal processing; amplitude modulation; audio coding; codecs; frequency-domain analysis; land mobile radio; quantisation (signal); radio broadcasting; signal reconstruction; AM broadcasting audio quality; audio coding algorithm; bit-rate reduction; codec; decoding; low bit-rate audio coder; matching pursuits algorithm; modified sinusoidal model; parameter quantization; phaseless frequency domain audio reconstruction; psychoacoustic model; signal adaptive analysis length; wireless mobile communications; Algorithm design and analysis; Audio coding; Codecs; Matching pursuit algorithms; Mobile communication; Psychoacoustic models; Pursuit algorithms; Quantization; Signal analysis; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on

Print_ISBN

0-7803-7547-5

Type

conf

DOI

10.1109/ICCCAS.2002.1180701

Filename

1180701