Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (1): 29-34.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Relationship Between MDCT and Simultaneous M ask Efect Curve

xie Zhi-wen1  Yin Jun-Xun2   

  1. 1.College of Physics Science and Tech.,South China Univ.of Tech.,Guangzhou 5 10640,Guangdong,China;2.College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-04-04 Online:2006-01-25 Published:2006-01-25
  • Contact: 谢志文(1962-)，男，副教授，主要从事声信号处理、心理声学方面的研究 E-mail:phzhwxie@scut.edu.cn
  • About author:谢志文(1962-)，男，副教授，主要从事声信号处理、心理声学方面的研究

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Abstract:

The relati0nship among modified discrete cosine transform(MDCT),discrete Fourier transform (DFr) and simuhaneous mask effect curve is investigated in this paper,concluding that it is impossible to get a MDCT simultaneous mask effect curve being adapted for all sample ratios and transfornl block sizes via experiments or theoretical analyses.because the amplitude and frequency shift of the sinusoidal component represented by XMDcT(k) are related to samp1e ratio and wave number k.Thus,it is necessary to calculate the simultaneous mask threshold by means of DFr in quantifying the MDCT coefficient.

Key words: Modified Discrete Cosine Transfornl, mask effect, Discrete Fourier Transfornl