A fast bit allocation algorithm for MPEG audio encoder

Author

Fung, Kai-Tat ; Chan, Yui-Lam ; Siu, Wan-chi

Author_Institution

Centre for Multimedia Signal Process., Hong Kong Polytech., Hung Hom, China

fYear

2001

fDate

2001

Firstpage

5

Lastpage

8

Abstract

A fast bit allocation algorithm for the MPEG audio encoder is proposed. The proposed algorithm employs the bit allocation information of the previous audio frame as a reference for allocating the restricted bits to each of the 32 subbands in the current audio frame such that the number of iterations can be significantly reduced. A process of bit reallocation is also suggested to ensure the generation of an identical MPEG bitstream produced by the standard bit allocation algorithm described in the MPEG audio standard. The result shows that the speed-up of the proposed algorithm is remarkable at different encoded bitrates

Keywords

audio coding; data compression; multimedia communication; quantisation (signal); resource allocation; MPEG audio encoder; MPEG audio standard; bit allocation information; bit reallocation; current audio frame; encoded bitrates; fast bit allocation algorithm; identical MPEG bitstream; iterations; previous audio frame; restricted bits; standard bit allocation algorithm; subbands; Audio coding; Bit rate; Ear; Filters; Masking threshold; Noise level; Psychoacoustic models; Quantization; Signal processing algorithms; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Multimedia, Video and Speech Processing, 2001. Proceedings of 2001 International Symposium on

Conference_Location

Hong Kong

Print_ISBN

962-85766-2-3

Type

conf

DOI

10.1109/ISIMP.2001.925316

Filename

925316