Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/69089
Title: A statistics study of the MDCT coefficient distribution for audio
Authors: Yu, R.
Lin, X.
Rahardja, S.
Ko, C.C. 
Issue Date: 2004
Source: Yu, R.,Lin, X.,Rahardja, S.,Ko, C.C. (2004). A statistics study of the MDCT coefficient distribution for audio. 2004 IEEE International Conference on Multimedia and Expo (ICME) 2 : 1483-1486. ScholarBank@NUS Repository.
Abstract: The Modified Discrete Cosine Transform (MDCT) has been widely used in many transform audio coding algorithms such as MPEG-1/2 Layer III (mp3), MPEG-2/4 AAC, Dolby AC2/AC3, and numerous experimental audio coding algorithms. In this paper, we study the probabilistic distribution properties of the MDCT coefficient for audio signals. It is shown that the generalized Gaussian function with distribution parameter r=0.5 or r=1 (Laplacian) provides a good approximation to the distributions of MDCT coefficients for a variety of audio signals. Results from our study also show that although the distribution of these coefficients is not strictly Laplacian, the divergence between them is in fact very small. Therefore it will lead to only marginal redundancy if these coefficients are simply coded with some low-complexity codes designed for Laplacian sources.
Source Title: 2004 IEEE International Conference on Multimedia and Expo (ICME)
URI: http://scholarbank.nus.edu.sg/handle/10635/69089
ISBN: 0780386035
Appears in Collections:Staff Publications

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