The filterbank in MP3 and AAC encoders: A comparative analysis
Jie Zhu, Rangding Wang, Juan Li, Diqun Yan · 2011
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.