The filterbank in MP3 and AAC encoders: A comparative analysis

Author

Zhu, Jie ; Wang, Rangding ; Li, Juan ; Yan, Diqun

Author_Institution

CKC Software Lab., Ningbo Univ., Ningbo, China

fYear

2011

fDate

9-11 Sept. 2011

Firstpage

1110

Lastpage

1113

Abstract

MP3 and AAC both use the filterbank to convert audio signal from time domain to frequency domain, which plays an important role in the whole encoder processing. Analysis the application of the filterbank in MP3 and AAC will help to understand the difference of them in coding efficiency and audio quality better. Therefore, from three points, which are the components of filterbank, the selection of window shape and the type of the translation block, this paper analyses the filterbank in MP3 and AAC respectively, then explores the differences between them and gives some related experiments. The result shows that, compared with MP3, AAC shows a better coding efficiency and audio distortion control only in the filterbank module.

Keywords

audio signal processing; channel bank filters; encoding; AAC encoder; MP3 encoder; audio distortion control; audio signal encoder; comparative analysis; filterbank; frequency domain analysis; time domain analysis; translation block selection; window shape selection; Audio coding; Digital audio players; Filter banks; Quantization; Shape; Signal resolution; audio quality; coding efficiency; comparative; filterbank;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Communications and Control (ICECC), 2011 International Conference on

Conference_Location

Zhejiang

Print_ISBN

978-1-4577-0320-1

Type

conf

DOI

10.1109/ICECC.2011.6066707

Filename

6066707