Title :
Gain comparison of time-frequency mapping for high quality audio coding
Author :
Yan, Jianxin ; Dong, Zaiwang ; Dou, Weibei
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a few time-frequency mappings (TFM) applied to high quality audio coding are introduced at first, and then the related calculation formulae for performance evaluation of TFMs is briefly reviewed. Meantime, several theoretical coding gains for long and short transforms are tabulated. Finally, by analyzing coding gain for five kinds of TFMs with four typical audio clips, a novel TFM structure, which can satisfy time-frequency resolution requirement of audio coding and reduce more redundancy is suggested.
Keywords :
audio coding; time-frequency analysis; coding gains; high quality audio coding; long transforms; short transforms; time-frequency mapping; Audio coding; Audio compression; Bit rate; Digital communication; Laboratories; Masking threshold; Psychoacoustic models; Signal resolution; Source coding; Time frequency analysis;
Conference_Titel :
Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on
Print_ISBN :
0-7803-7946-2
DOI :
10.1109/ISSPA.2003.1224910
